Typed arguments, calculated tables, spans, closed-world fonts, top-level fnt/ and env/

Sync with klammertext-dev through b90b0e09: - Argument types end to end: :python_cast values are applied (Python @eval receives real bools/numbers/lists), argument values are validated against their argtype patterns with the argtype's description as the error message, argtypes can declare :default (overridable per declaration), and parameterized type families are supported: rest(N) casts a rest argument to an N-dimensional list (bar-count = dimension). - Unified indexed_range syntax (selector with parenthesized subsets, composable mnemonic names) for table lines and spans. - Table klammer: caption fonts fixed in both targets, :column_width / :leading / :colsep wired, :colspan and :rowspan render (HTML attributes; \multicolumn / \multirow), calculated cell values (:calc) with prefix operators, display-precision semantics, :calc_format and :decimal period|comma. - Fonts: closed-world resolution on the Klammertext font store (infrastructure in mac/font_store; no Google Fonts links or fetch). Default fonts live in the top-level fnt/; additional fonts install into KLAMMERTEXT_FONTS directories via kdesc --font (list, samples, preview, install — classification by font metadata). CSS font family names are quoted (digit-initial families were silently lost). - Environment files moved from mac/env/ to the top-level env/; shell profiles source env/runtime.env. Dead per-host variants removed. - Container: fnt/ ships in the image; curl removed (no network use).
2026-07-22 18:17:43 +02:00
parent 6b75aa0c54
commit 8a2699a253
100 changed files with 1726 additions and 1152 deletions
--- a/com/Makefile
+++ b/com/Makefile
@@ -5,7 +5,7 @@ K := $(KLAMMERTEXT_HOME)
 KS := $(K)/sks
 KM := $(K)/mac

-include $(KM)/env/makefile.env
+include $(K)/env/makefile.env

 # Commands to build
 COMMANDS := kdiag kdesc ktext
--- a/com/kdesc.cpp
+++ b/com/kdesc.cpp
@@ -2,6 +2,7 @@
 #include "command.h"
 #include "error.h"
 #include "file.h"
+#include "font_store.h"
 #include "ktype.h"
 #include "log.h"
 #include "argtype_set.h"
@@ -9,6 +10,52 @@
 #include "show.h"
 #include "util.h"

+static void font_usage()
+{
+    std::cout <<
+        "Font maintenance commands:\n"
+        "  --font                        List the available fonts\n"
+        "  --font list                   The same\n"
+        "  --font samples <output-dir>   Write a sample page of the available fonts\n"
+        "                                to <output-dir>/index.html\n"
+        "  --font samples <input-dir> <output-dir>\n"
+        "                                Write a sample page for the (not yet\n"
+        "                                installed) font files under <input-dir>\n"
+        "  --font install <input-dir>    Install the font files found under\n"
+        "                                <input-dir> into the user font directory\n"
+        "  --font install <input-dir> <output-dir>\n"
+        "                                Install into <output-dir> instead\n"
+        "  --font help                   This description\n"
+        "\n"
+        "Fonts are searched in the directories of the KLAMMERTEXT_FONTS\n"
+        "environment variable (colon-separated; default $HOME/.klammertext/fonts)\n"
+        "and then in the default font set.\n";
+}
+
+static void font_command(const strings_t& words)
+{
+    std::string verb = words.empty() ? "list" : words[0];
+    size_t n = words.size() - (words.empty() ? 0 : 1);
+    if (verb == "list" && n == 0) {
+        std::cout << boldblack << "Fonts\n" << black << describe_fonts();
+    } else if (verb == "samples" && n == 1) {
+        std::cout << "Font samples written to "
+                  << write_font_samples(words[1]) << "\n";
+    } else if (verb == "samples" && n == 2) {
+        std::cout << "Font samples written to "
+                  << write_font_samples(words[2], words[1]) << "\n";
+    } else if (verb == "install" && (n == 1 || n == 2)) {
+        std::cout << "Installing fonts from " << words[1] << ":\n"
+                  << install_fonts(words[1], n == 2 ? words[2] : "");
+    } else if (verb == "help") {
+        font_usage();
+    } else {
+        std::cout << "Unrecognized font command: --font " << join(words, " ")
+                  << "\n\n";
+        font_usage();
+    }
+}
+
 int main(int argc, char* argv[])
 {
    try {
@@ -22,6 +69,7 @@ int main(int argc, char* argv[])
        args.opt("input", "Input filename", "filename", "", "'text'");
        args.flag("targets", "Show targets defined by the input file");
        args.flag("klammers", "Show klammers defined by the input file");
+        args.var("font", "List installed fonts.  Enter \"--font help\" for font maintenance commands.");
        args.opt("v",  "'verbosity'", "n", "0", "'verbosity'");

        if (show_usage(argc, argv)) {
@@ -55,6 +103,19 @@ int main(int argc, char* argv[])
            describe_rewrite_patterns();
        }

+        // The --font subcommands operate on the Klammertext font store
+        // (infrastructure) and load no klammer set.
+        if (args.given("font")) {
+            strings_t words {};
+            for (const std::string& w : word_split(args.get("font"))) {
+                if (!w.empty()) {
+                    words.push_back(w);
+                }
+            }
+            font_command(words);
+            return 0;
+        }
+
        Machine M;

        strings_t input_filenames = args.as_vector("input");
--- a/doc/install/linux_source_install.md
+++ b/doc/install/linux_source_install.md
@@ -51,7 +51,7 @@ Klammertext's runtime environment is provided by a single self-configuring
 file. Source it from your shell profile (e.g., `~/.bashrc` or `~/.zshrc`):

 ```bash
-source /path/to/klammertext/mac/env/runtime.env
+source /path/to/klammertext/env/runtime.env
 ```

 It self-locates `KLAMMERTEXT_HOME` from its own path, adds `bin/` and
@@ -59,7 +59,7 @@ It self-locates `KLAMMERTEXT_HOME` from its own path, adds `bin/` and
 TeX Live is installed there), sets `LD_LIBRARY_PATH` so `libklammertext.so` is
 found, and sets the LSan suppressions. There is no per-host or per-OS variable
 to set. For a TeX Live or library in a non-standard location, add it to an
-optional, gitignored `mac/env/runtime.env.local` (sourced at the end).
+optional, gitignored `env/runtime.env.local` (sourced at the end).

 After editing your shell profile, reload it:

@@ -70,7 +70,7 @@ source ~/.bashrc

 ## Configure the build

-No build configuration is needed. The single `mac/env/makefile.env` is
+No build configuration is needed. The single `env/makefile.env` is
 cross-platform: it reads `KLAMMERTEXT_HOME` from the environment (set by
 `runtime.env` above), auto-detects the platform with `uname`, and auto-detects
 Python with `python3-config` — no hardcoded version and no per-host file to
@@ -149,7 +149,7 @@ from the gitignored escape hatch instead, and install the SKS's extra packages
 into it yourself (the package list is in `doc/install/texlive_additional_packages.sh`):

 ```bash
-cat >> "$KLAMMERTEXT_HOME/mac/env/runtime.env.local" <<'EOF'
+cat >> "$KLAMMERTEXT_HOME/env/runtime.env.local" <<'EOF'
 export KLAMMERTEXT_TEXLIVE_BIN=/path/to/texlive/bin/x86_64-linux
 export PATH="$KLAMMERTEXT_TEXLIVE_BIN:$PATH"
 EOF
--- a/doc/install/macos_source_install.md
+++ b/doc/install/macos_source_install.md
@@ -3,7 +3,7 @@
 Companion to `linux_source_install.md`. Verified on an Apple-Silicon Mac
 (arm64, macOS 26 "Tahoe"). Klammertext's core (engine, SKS, HTML/LaTeX,
 `@image`) builds and runs natively with Apple Clang; the cross-platform build
-environment (`mac/env/makefile.env`) auto-detects the OS via `uname`.
+environment (`env/makefile.env`) auto-detects the OS via `uname`.

 ## 1. Toolchain prerequisites

@@ -63,7 +63,7 @@ ffmpeg/openexr/etc.)
 ```sh
 git clone https://git.andykopra.com/ack/klammertext.git ~/projects/klammertext
 # Set up the runtime environment (KLAMMERTEXT_HOME, PATH); add to ~/.zprofile:
-echo 'source "$HOME/projects/klammertext/mac/env/runtime.env"' >> ~/.zprofile
+echo 'source "$HOME/projects/klammertext/env/runtime.env"' >> ~/.zprofile
 ```

 The single self-configuring `runtime.env` self-locates `KLAMMERTEXT_HOME` from
@@ -132,7 +132,7 @@ variable **and** prepend it to `PATH`, since `runtime.env.local` is sourced
 after the main `PATH` is built:

 ```sh
-cat >> "$KLAMMERTEXT_HOME/mac/env/runtime.env.local" <<'EOF'
+cat >> "$KLAMMERTEXT_HOME/env/runtime.env.local" <<'EOF'
 export KLAMMERTEXT_TEXLIVE_BIN=/usr/local/texlive/2025basic/bin/universal-darwin
 export PATH="$KLAMMERTEXT_TEXLIVE_BIN:$PATH"
 EOF
--- a/mac/env/lsan.supp
+++ b/mac/env/lsan.supp
--- a/mac/env/makefile.env
+++ b/mac/env/makefile.env
@@ -1,7 +1,7 @@
-# mac/env/makefile.env — single cross-platform build environment for Klammertext.
+# env/makefile.env — single cross-platform build environment for Klammertext.
 #
 # Included identically by every component Makefile:
-#     include $(KLAMMERTEXT_HOME)/mac/env/makefile.env
+#     include $(KLAMMERTEXT_HOME)/env/makefile.env
 #
 # The platform is auto-detected with uname; the compiler is chosen with
 #     make COMPILER=gcc      (default)
@@ -9,10 +9,10 @@
 # There is no per-host/per-OS file and no DESKTOP_SESSION/HOST/SITE selector.

 ifndef KLAMMERTEXT_HOME
-$(error KLAMMERTEXT_HOME is not set -- source mac/env/runtime.env first)
+$(error KLAMMERTEXT_HOME is not set -- source env/runtime.env first)
 endif

-include $(KLAMMERTEXT_HOME)/mac/env/optimize.env
+include $(KLAMMERTEXT_HOME)/env/optimize.env

 UNAME_S     := $(shell uname -s)
 CPP_VERSION := c++20
--- a/mac/env/optimize.env
+++ b/mac/env/optimize.env
--- a/mac/env/runtime.env
+++ b/mac/env/runtime.env
@@ -1,22 +1,22 @@
-# mac/env/runtime.env — single self-configuring runtime environment for Klammertext.
+# env/runtime.env — single self-configuring runtime environment for Klammertext.
 #
 # Source this from your shell profile (~/.bashrc etc.):
-#     source /path/to/klammertext/K/mac/env/runtime.env
+#     source /path/to/klammertext/K/env/runtime.env
 #
-# This is the runtime counterpart of the shared mac/env/makefile.env: one file
+# This is the runtime counterpart of the shared env/makefile.env: one file
 # for every machine, with all machine-specific values AUTO-DETECTED. There is no
 # per-host runtime.env.<host> file and no HOST/OS/SITE selector.
 #   - KLAMMERTEXT_HOME     : derived from this file's own location (self-locating)
 #   - KLAMMERTEXT_TEXLIVE_BIN : newest ~/external/texlive/<year>/bin/<arch>
 # Machine-unique, non-committable additions (extra library paths such as NVIDIA
-# iray, local tools, etc.) go in an optional, gitignored mac/env/runtime.env.local
+# iray, local tools, etc.) go in an optional, gitignored env/runtime.env.local
 # sourced at the end -- NOT in this shared file, so one machine's bundled
 # libraries can't shadow another's system libraries.

 # --- KLAMMERTEXT_HOME: self-locate (bash sets BASH_SOURCE; zsh sets $0) --------
-# This file lives at $KLAMMERTEXT_HOME/mac/env/runtime.env, so go up two levels.
+# This file lives at $KLAMMERTEXT_HOME/env/runtime.env, so go up one level.
 _kt_self="${BASH_SOURCE[0]:-$0}"
-export KLAMMERTEXT_HOME="$(cd "$(dirname "$_kt_self")/../.." && pwd)"
+export KLAMMERTEXT_HOME="$(cd "$(dirname "$_kt_self")/.." && pwd)"
 unset _kt_self

 _kt_uname="$(uname -s)"
@@ -58,7 +58,7 @@ else
    # LSan suppressions for unactionable libpython/OpenImageIO leaks (see
    # lsan.supp). Real leaks in Klammertext code are still reported; no effect
    # in performance builds (OPTIMIZE=1, which disables ASan).
-    export LSAN_OPTIONS="suppressions=$KLAMMERTEXT_HOME/mac/env/lsan.supp:print_suppressions=0"
+    export LSAN_OPTIONS="suppressions=$KLAMMERTEXT_HOME/env/lsan.supp:print_suppressions=0"
    export LD_LIBRARY_PATH="$KLAMMERTEXT_HOME/mac:$KLAMMERTEXT_HOME/sks/kutil:$KLAMMERTEXT_HOME/sks/document:$KLAMMERTEXT_HOME/doc/handbook${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}"
 fi
 unset _kt_uname
@@ -67,6 +67,6 @@ unset _kt_uname
 # Use an if-block (not `[ -f ] && .`) so that when the local file is absent this
 # file's final exit status is 0 -- otherwise `source runtime.env` returns
 # non-zero, breaking `source runtime.env && ...` and `set -e` callers.
-if [ -f "$KLAMMERTEXT_HOME/mac/env/runtime.env.local" ]; then
-    . "$KLAMMERTEXT_HOME/mac/env/runtime.env.local"
+if [ -f "$KLAMMERTEXT_HOME/env/runtime.env.local" ]; then
+    . "$KLAMMERTEXT_HOME/env/runtime.env.local"
 fi
--- a/sks/font/fonts/crimson-pro.css
+++ b/sks/font/fonts/crimson-pro.css
--- a/sks/font/fonts/crimson-pro/Bold.ttf
+++ b/sks/font/fonts/crimson-pro/Bold.ttf
--- a/sks/font/fonts/crimson-pro/BoldItalic.ttf
+++ b/sks/font/fonts/crimson-pro/BoldItalic.ttf
--- a/sks/font/fonts/crimson-pro/Italic.ttf
+++ b/sks/font/fonts/crimson-pro/Italic.ttf
--- a/sks/font/fonts/crimson-pro/Regular.ttf
+++ b/sks/font/fonts/crimson-pro/Regular.ttf
--- a/sks/font/fonts/inconsolata.css
+++ b/sks/font/fonts/inconsolata.css
--- a/sks/font/fonts/inconsolata/Bold.ttf
+++ b/sks/font/fonts/inconsolata/Bold.ttf
--- a/sks/font/fonts/inconsolata/Regular.ttf
+++ b/sks/font/fonts/inconsolata/Regular.ttf
--- a/sks/font/fonts/libre-baskerville.css
+++ b/sks/font/fonts/libre-baskerville.css
--- a/sks/font/fonts/libre-baskerville/libre-baskerville-v5-latin-regular.eot
+++ b/sks/font/fonts/libre-baskerville/libre-baskerville-v5-latin-regular.eot
--- a/sks/font/fonts/libre-baskerville/libre-baskerville-v5-latin-regular.svg
+++ b/sks/font/fonts/libre-baskerville/libre-baskerville-v5-latin-regular.svg
--- a/sks/font/fonts/libre-baskerville/libre-baskerville-v5-latin-regular.ttf
+++ b/sks/font/fonts/libre-baskerville/libre-baskerville-v5-latin-regular.ttf
--- a/sks/font/fonts/libre-baskerville/libre-baskerville-v5-latin-regular.woff
+++ b/sks/font/fonts/libre-baskerville/libre-baskerville-v5-latin-regular.woff
--- a/sks/font/fonts/libre-baskerville/libre-baskerville-v5-latin-regular.woff2
+++ b/sks/font/fonts/libre-baskerville/libre-baskerville-v5-latin-regular.woff2
--- a/sks/font/fonts/linux-libertine.css
+++ b/sks/font/fonts/linux-libertine.css
--- a/sks/font/fonts/linux-libertine/GPL.txt
+++ b/sks/font/fonts/linux-libertine/GPL.txt
--- a/sks/font/fonts/linux-libertine/LICENCE.txt
+++ b/sks/font/fonts/linux-libertine/LICENCE.txt
--- a/sks/font/fonts/linux-libertine/LinLibertine_RBah.ttf
+++ b/sks/font/fonts/linux-libertine/LinLibertine_RBah.ttf
--- a/sks/font/fonts/linux-libertine/LinLibertine_RIah.ttf
+++ b/sks/font/fonts/linux-libertine/LinLibertine_RIah.ttf
--- a/sks/font/fonts/linux-libertine/LinLibertine_Rah.ttf
+++ b/sks/font/fonts/linux-libertine/LinLibertine_Rah.ttf
--- a/sks/font/fonts/linux-libertine/OFL-1.1.txt
+++ b/sks/font/fonts/linux-libertine/OFL-1.1.txt
--- a/sks/font/fonts/open-sans.css
+++ b/sks/font/fonts/open-sans.css
--- a/sks/font/fonts/open-sans/Bold.ttf
+++ b/sks/font/fonts/open-sans/Bold.ttf
--- a/sks/font/fonts/open-sans/BoldItalic.ttf
+++ b/sks/font/fonts/open-sans/BoldItalic.ttf
--- a/sks/font/fonts/open-sans/Italic.ttf
+++ b/sks/font/fonts/open-sans/Italic.ttf
--- a/sks/font/fonts/open-sans/Regular.ttf
+++ b/sks/font/fonts/open-sans/Regular.ttf
--- a/sks/font/fonts/roboto-mono.css
+++ b/sks/font/fonts/roboto-mono.css
--- a/sks/font/fonts/roboto-mono/LICENSE.txt
+++ b/sks/font/fonts/roboto-mono/LICENSE.txt
--- a/sks/font/fonts/roboto-mono/RobotoMono-Italic.ttf
+++ b/sks/font/fonts/roboto-mono/RobotoMono-Italic.ttf
--- a/sks/font/fonts/roboto-mono/RobotoMono-Regular.ttf
+++ b/sks/font/fonts/roboto-mono/RobotoMono-Regular.ttf
--- a/sks/font/fonts/source-code-pro.css
+++ b/sks/font/fonts/source-code-pro.css
--- a/sks/font/fonts/source-code-pro/source-code-pro-v7-latin-regular.eot
+++ b/sks/font/fonts/source-code-pro/source-code-pro-v7-latin-regular.eot
--- a/sks/font/fonts/source-code-pro/source-code-pro-v7-latin-regular.svg
+++ b/sks/font/fonts/source-code-pro/source-code-pro-v7-latin-regular.svg
--- a/sks/font/fonts/source-code-pro/source-code-pro-v7-latin-regular.ttf
+++ b/sks/font/fonts/source-code-pro/source-code-pro-v7-latin-regular.ttf
--- a/sks/font/fonts/source-code-pro/source-code-pro-v7-latin-regular.woff
+++ b/sks/font/fonts/source-code-pro/source-code-pro-v7-latin-regular.woff
--- a/sks/font/fonts/source-code-pro/source-code-pro-v7-latin-regular.woff2
+++ b/sks/font/fonts/source-code-pro/source-code-pro-v7-latin-regular.woff2
--- a/sks/font/fonts/source-sans-pro.css
+++ b/sks/font/fonts/source-sans-pro.css
--- a/sks/font/fonts/source-sans-pro/OFL.txt
+++ b/sks/font/fonts/source-sans-pro/OFL.txt
--- a/sks/font/fonts/source-sans-pro/SourceSansPro-Italic.ttf
+++ b/sks/font/fonts/source-sans-pro/SourceSansPro-Italic.ttf
--- a/sks/font/fonts/source-sans-pro/SourceSansPro-Regular.ttf
+++ b/sks/font/fonts/source-sans-pro/SourceSansPro-Regular.ttf
--- a/mac/Makefile
+++ b/mac/Makefile
@@ -4,13 +4,13 @@
 K := $(KLAMMERTEXT_HOME)
 KS := $(K)/sks

-include $(K)/mac/env/makefile.env
+include $(K)/env/makefile.env

 # Source files
 BASENAMES := util error locator file argv character ktype katom katom_list \
             log show command argument argument_set argtype argtype_set \
             state eval eval_python eval_cpp klammer klammer_set deftype \
-             target target_set machine
+             target target_set machine font_store

 SOURCES := $(addsuffix .cpp,$(BASENAMES))
 OBJECTS := $(addsuffix .o,$(BASENAMES))
--- a/mac/argtype.cpp
+++ b/mac/argtype.cpp
@@ -7,12 +7,13 @@
 #include "util.h"

 Argtype::Argtype(std::string name, std::string desc, std::string symbolic_pattern, std::string pattern,
-                 std::string python_cast, modify_string_f python_format,
+                 std::string default_value, std::string python_cast, modify_string_f python_format,
                 const Locator& loc)
    : m_name(name)
    , m_desc(desc)
    , m_symbolic_pattern(symbolic_pattern)
    , m_pattern(pattern)
+    , m_default(default_value)
    , m_python_cast(python_cast)
    , m_python_format(python_format)
    , m_regex(std::regex(pattern))
@@ -20,22 +21,25 @@ Argtype::Argtype(std::string name, std::string desc, std::string symbolic_patter
 {
 }

+static bool empty_value(const strings_t& v)
+{
+    return v.empty() || (v.size() == 1 && v[0].empty());
+}
+
 std::string pyformat_string(const strings_t& v)
 {
-    std::string p = v[0];
-    std::string delim = "\"";
-    if (contains(p, "\"\"\"")) {
-        delim = "'''";
-    } else if (contains(p, "'''")) {
-        delim = "\"\"\"";
-    } else if (contains(p, "\"")) {
-        delim = "'";
-    }
-    return delim + p + delim;
+    std::string p = v.empty() ? "" : v[0];
+    p = string_replace(p, "\\", "\\\\");
+    p = string_replace(p, "\"", "\\\"");
+    p = string_replace(p, "\n", "\\n");
+    return "\"" + p + "\"";
 }

 std::string pyformat_bool(const strings_t& v)
 {
+    if (empty_value(v)) {
+        return "None";
+    }
    std::string value = v[0];
    std::set<std::string> true_values { "1", "true", "True", "yes" };
    std::set<std::string> false_values { "0", "false", "False", "no" };
@@ -50,6 +54,9 @@ std::string pyformat_bool(const strings_t& v)

 std::string pyformat_number(const strings_t& value)
 {
+    if (empty_value(value)) {
+        return "None";
+    }
    return value[0];
 }

@@ -62,12 +69,29 @@ std::string pylist(strings_t words)

 std::string pyformat_list(const strings_t& value)
 {
-    return pylist(value);
+    strings_t words {};
+    for (const std::string& v : value) {
+        for (const std::string& word : word_split(v)) {
+            if (!word.empty()) {
+                words.push_back(word);
+            }
+        }
+    }
+    return pylist(words);
 }

 std::string pyformat_dlist(const strings_t& value)
 {
-    return pylist(value);
+    strings_t items {};
+    for (const std::string& v : value) {
+        if (v.empty()) {
+            continue;
+        }
+        for (const std::string& item : dlist_split(v)) {
+            items.push_back(item);
+        }
+    }
+    return pylist(items);
 }

 std::string Argtype::python_value(const std::string& var_name, std::vector<std::string> value, size_t name_size)
@@ -76,7 +100,18 @@ std::string Argtype::python_value(const std::string& var_name, std::vector<std::
    ss << "    " << std::left << std::setw(name_size) << var_name << " = ";
    if (m_python_format) {
        ss << m_python_format(value);
+    } else if (m_python_cast.empty() || m_python_cast == "str") {
+        // String-family types (and untyped variables): plain quoted string.
+        ss << pyformat_string(value);
+    } else if (!m_parameter.empty()) {
+        // Parameterized type: bind the type parameter as N around the
+        // cast, e.g. (lambda N: <cast>)(2)("A | B || C | D").
+        ss << "(lambda N: " << m_python_cast << ")(" << m_parameter << ")("
+           << pyformat_string(value) << ")";
    } else {
+        // User-defined :python_cast expression, applied to the raw value.
+        // The cast is applied to an empty value too, so e.g. a split lambda
+        // yields [] for an unsupplied argument.
        ss << m_python_cast << "(" << pyformat_string(value) << ")";
    }
    return ss.str();
--- a/mac/argtype.h
+++ b/mac/argtype.h
@@ -17,23 +17,42 @@ public:
    Argtype()
        : m_name("default")
        , m_desc("default argument type")
-        , m_symbolic_pattern(".+")
-        , m_pattern(".+")
+        , m_symbolic_pattern(R"((?:.|\n)*)")
+        , m_pattern(R"((?:.|\n)*)")
        , m_python_cast("str")
        , m_python_format()
+        , m_regex(std::regex(R"((?:.|\n)*)"))
        , m_loc()
        {};

    Argtype(std::string name, std::string desc, std::string symbolic_pattern, std::string pattern,
-            std::string python_cast, modify_string_f python_format,
+            std::string default_value, std::string python_cast, modify_string_f python_format,
            const Locator& loc);

    std::string python_value(const std::string& var_name, std::vector<std::string> value, size_t name_size);

+    // True for the match-everything pattern shared by the string family
+    // (string, rest, literal, and the default type).  Validating against
+    // it is pointless, and running std::regex over a large value (e.g.
+    // @document's :text holding a whole document) overflows the regex
+    // executor's recursion stack.
+    bool matches_all() const { return m_pattern == R"((?:.|\n)*)"; };
+
    std::string m_name {};
    std::string m_desc {};
    std::string m_symbolic_pattern {};
    std::string m_pattern {};
+    // Default value for parameters of this type; a default given in a
+    // klammer's parameter declaration overrides it (see
+    // parse_optional_parameter).  Useful for single-purpose types
+    // (cell_hpos, column_width); general types (bool, float) have no
+    // sensible universal default and leave it empty.
+    std::string m_default {};
+    // Type parameter for parameterized types like rest(2): the value N
+    // is bound around the python cast as (lambda N: <cast>)(2)(...).
+    // Empty means unparameterized; a type with a default parameter
+    // (rest -> "1") is specialized by writing type(N) in a declaration.
+    std::string m_parameter {};
    std::string m_python_cast {};
    modify_string_f m_python_format {};
    std::regex m_regex {};
--- a/mac/argtype_set.cpp
+++ b/mac/argtype_set.cpp
@@ -13,7 +13,7 @@

 Parameter_set& Argtype_set::parameters()
 {
-    static Parameter_set instance("name | desc :pattern .* :python_cast str");
+    static Parameter_set instance("name | desc :pattern .* :python_cast str :default");
    return instance;
 }

@@ -22,8 +22,11 @@ Argtype_set::Argtype_set()
    (void)(void)K::log(2);
    Locator loc = current_locator();
    for (auto [name, desc, pattern, python_cast, python_format] : base_argtypes) {
-        add(name, desc, pattern, python_cast, python_format, loc);
+        add(name, desc, pattern, "", python_cast, python_format, loc);
    }
+    // rest is a parameterized type (rest(N)); an unparameterized use is
+    // one-dimensional.
+    m_types["rest"].m_parameter = "1";
 }

 std::string Argtype_set::replace_symbols(const std::string& pattern, const Locator& loc)
@@ -59,7 +62,7 @@ void Argtype_set::check_for_existing_definition(
 }

 void Argtype_set::add(const std::string& name, const std::string& desc,
-                      const std::string& pattern,
+                      const std::string& pattern, const std::string& default_value,
                      const std::string& python_cast, modify_string_f python_format,
                      const Locator& loc)
 {
@@ -68,17 +71,35 @@ void Argtype_set::add(const std::string& name, const std::string& desc,
    std::string expanded_pattern = replace_symbols(pattern, loc);
    m_name_size = std::max(m_name_size, name.size()); // For display
    m_pattern_size = std::max(m_pattern_size, expanded_pattern.size());
-    m_types[name] = Argtype(name, desc, pattern, expanded_pattern, python_cast, python_format, loc);
+    try {
+        m_types[name] = Argtype(name, desc, pattern, expanded_pattern,
+                                default_value, python_cast, python_format, loc);
+    } catch (const std::regex_error& e) {
+        std::stringstream ss {};
+        ss << "The pattern for argument type \"" << name
+           << "\" is not a valid regular expression (" << e.what() << "):\n"
+           << "  " << pattern << "\n";
+        if (pattern != expanded_pattern) {
+            ss << "expanded to:\n  " << expanded_pattern << "\n";
+        }
+        throw Definition_error(ss.str(), loc, false);
+    }
+    if (!default_value.empty() &&
+        !std::regex_match(default_value, m_types[name].m_regex)) {
+        std::stringstream ss {};
+        ss << "The default value \"" << default_value << "\" for argument type \""
+           << name << "\" does not match its own pattern:\n"
+           << "  " << pattern << "\n";
+        throw Definition_error(ss.str(), loc, false);
+    }
    m_names.push_back(name);
 }

 void Argtype_set::add(std::vector<Katom>::iterator begin, std::vector<Katom>::iterator end, std::vector<Katom>& katoms)
 {
    (void)K::log(3);
-    //Argument_set parameters("name | desc :pattern .* :python_cast str");
-    
    auto [positional, optional, rest] =
-        argument_split(begin + 1, end); //, Argtype_set::parameters.m_positional.size());
+        argument_split(begin + 1, end - 1); //, Argtype_set::parameters.m_positional.size());

    check_for_existing_definition(positional[0][0].m_text, begin->m_loc);

@@ -86,11 +107,8 @@ void Argtype_set::add(std::vector<Katom>::iterator begin, std::vector<Katom>::it

    // std::for_each(begin, end+1, [](Katom& k) { k.m_type = katom_t::replaced; });

-    modify_string_f pyformat {};
-    std::string pycast {};
-
-    add(values["name"], values["desc"], values["pattern"],
-        pycast, pyformat,
+    add(values["name"], values["desc"], values["pattern"], values["default"],
+        values["python_cast"], modify_string_f{},
        begin->m_loc);
    
    modify_type(katom_t::replaced, begin, end);
--- a/mac/argtype_set.h
+++ b/mac/argtype_set.h
@@ -18,7 +18,8 @@ public:
    std::string replace_symbols(const std::string& pattern, const Locator& loc);
    void check_for_existing_definition(const std::string& name, const Locator& loc);
    void add(const std::string& name, const std::string& desc,
-             const std::string& pattern, const std::string& python_cast, modify_string_f python_format,
+             const std::string& pattern, const std::string& default_value,
+             const std::string& python_cast, modify_string_f python_format,
             const Locator& loc);
    void add(std::vector<Katom>::iterator begin, std::vector<Katom>::iterator end, std::vector<Katom>& katoms);

@@ -63,7 +64,7 @@ std::vector<std::tuple<std::string, std::string, std::string, std::string, modif
      pyformat_number },

    { "float", "a floating-point number",
-      R"([-+]?\d+(\.\d*)?)", "float",
+      R"([-+]?(\d+(\.\d*)?|\.\d+))", "float",
      pyformat_number },

    { "fraction", "a number in the form 'n/d'",
@@ -78,9 +79,11 @@ std::vector<std::tuple<std::string, std::string, std::string, std::string, modif
      R"((?:.|\n)*)", "",
      pyformat_dlist },

-    { "rest", "a list of strings delimited by the bar character",
-      R"(.*)", "str",
-      pyformat_string },
+    { "rest", "the remaining arguments as a list nested to N dimensions "
+      "(rest(N)); the delimiter for dimension n is a run of n bar "
+      "characters, so | separates elements and || lists of elements",
+      R"((?:.|\n)*)", R"((lambda s : __import__("kutil").rest_split(s, N)))",
+      nullptr },

    { "literal", "literal text passed without interpretation",
      R"((?:.|\n)*)", "str",
--- a/mac/argument.h
+++ b/mac/argument.h
@@ -30,6 +30,10 @@ public:
    Argtype m_argtype; // {};
    bool m_optional {};
    std::string m_default {};
+    // True when m_default was filled from the argument type's :default
+    // rather than declared in the klammer's parameter list (for kdesc
+    // provenance display).
+    bool m_default_from_type {};
    Locator m_loc;
    std::string m_target {};
 };
--- a/mac/argument_set.cpp
+++ b/mac/argument_set.cpp
@@ -17,16 +17,44 @@ bool operator==(Parameter_set lhs, Parameter_set rhs)

 std::regex parameter_regex(bool optional=false)
 {
-    //std::string pattern = R"(([A-Za-z]\w*)(?:(\.\w*)(?:(\.\w*)))?)";
-    std::string pattern = R"((?:([A-Za-z]\w*))|(?:([A-Za-z]\w*)\.(\w+))|(?:([A-Za-z]\w*)\.(\w+)\.(\w+)))";
+    // The type component may carry a numeric type parameter, e.g.
+    // rows.rest(2) (see resolve_argtype below).  In the optional
+    // three-part form the type may be empty (:paper_size..tex).
+    std::string type = R"(\w+(?:\(\d+\))?)";
+    std::string opt_type = R"(\w*(?:\(\d+\))?)";
+    std::string pattern = R"((?:([A-Za-z]\w*))|(?:([A-Za-z]\w*)\.()" + type +
+        R"())|(?:([A-Za-z]\w*)\.()" + type + R"()\.(\w+)))";
    if (optional) {
-        pattern = R"((?::([A-Za-z]\w*))|(?::([A-Za-z]\w*)\.(\w+))|(?::([A-Za-z]\w*)\.(\w*)\.(\w+)))";
-        //                             x                         x
+        pattern = R"((?::([A-Za-z]\w*))|(?::([A-Za-z]\w*)\.()" + type +
+            R"())|(?::([A-Za-z]\w*)\.()" + opt_type + R"()\.(\w+)))";
    }
    // (void)K::log(3, pattern);
    return std::regex(pattern);
 }

+// Look up an argument type, specializing a parameterized use such as
+// rest(2): the base type is copied, its type parameter set, and its
+// display name extended, so kdesc signatures show rows.rest(2).
+static Argtype resolve_argtype(
+    const std::string& type_text, const Argtype_set& argtypes, const Locator& loc)
+{
+    static const std::regex parameterized(R"((\w+)\((\d+)\))");
+    std::smatch match {};
+    if (std::regex_match(type_text, match, parameterized)) {
+        Argtype argtype = argtypes.get(match[1], loc);
+        argtype.m_parameter = match[2];
+        argtype.m_name += "(" + std::string(match[2]) + ")";
+        return argtype;
+    }
+    return argtypes.get(type_text, loc);
+}
+
+// True for the rest type in any parameterization (rest, rest(2), ...).
+static bool is_rest(const Argtype& argtype)
+{
+    return argtype.m_name == "rest" || argtype.m_name.rfind("rest(", 0) == 0;
+}
+
 Parameter_set::Parameter_set(const std::string parameter_string)
 {
    (void)K::log(3);
@@ -77,7 +105,7 @@ Parameter parse_positional_parameter(const katom_list& katoms, const Argtype_set
        if (match_type.empty()) {
            match_type = "string";
        }
-        return Parameter(match_name, argtypes.get(match_type, k.m_loc), k.m_loc);
+        return Parameter(match_name, resolve_argtype(match_type, argtypes, k.m_loc), k.m_loc);
    }
 }

@@ -105,8 +133,19 @@ Parameter parse_optional_parameter(const katom_list& katoms, const Argtype_set&
        if (match_type.empty()) {
            match_type = "string";
        }
-        return Parameter(match_name, argtypes.get(match_type, k.m_loc),
+        Parameter parameter(match_name, resolve_argtype(match_type, argtypes, k.m_loc),
                            k.m_loc, true, default_value);
+        // Two-level default resolution: a default declared in the
+        // parameter list wins; otherwise the argument type's :default
+        // fills in.  Both are validated here, at definition time, so an
+        // invalid default cannot reach an application.
+        if (default_value.empty() && !parameter.m_argtype.m_default.empty()) {
+            parameter.m_default = parameter.m_argtype.m_default;
+            parameter.m_default_from_type = true;
+        } else if (!default_value.empty()) {
+            Parameter_set::validate(parameter, default_value, k.m_loc);
+        }
+        return parameter;
    }
 }

@@ -213,7 +252,7 @@ void Parameter_set::parse_parameters(const katom_list& katoms, const Argtype_set
    auto [positional, optional] = parameter_split(katoms.cbegin(), katoms.cend());
    for (auto req : positional) {
        auto pos = parse_positional_parameter(req, argtypes);
-        if (pos.m_argtype.m_name == "rest") {
+        if (is_rest(pos.m_argtype)) {
            m_rest.push_back(pos);
        } else {
            m_positional.push_back(pos);
@@ -295,6 +334,13 @@ argument_split(katom_list::const_iterator kbegin, katom_list::const_iterator ken
        } else if (positional.size() < positional_limit) {
            positional.push_back(trim_part(p));
        } else {
+            // Parts were trimmed, so adjacent parts would abut their bar
+            // katoms (a row separator "||" next to an empty cell's "|"
+            // would serialize as "|||").  A space keeps the writer's
+            // bar/double-bar distinction parseable.
+            if (!rest.empty()) {
+                rest.push_back(Katom(" ", katom_t::space, p[0].m_loc));
+            }
            rest.insert(rest.end(), p.begin(), p.end());
        }
    }
@@ -386,9 +432,59 @@ Parameter_set::value_map(
            throw Argument_error(ss.str(), loc);
        }
    }
+    for (const auto& [name, value] : values) {
+        const Parameter* parameter = find(name);
+        if (parameter) {
+            validate(*parameter, value, loc);
+        }
+    }
    return values;
 }

+// Check an argument value against its argument type's pattern.  An empty
+// value (an unsupplied optional argument without a default) is not checked.
+// The error message includes the argument type's description from its
+// @@@argtype definition, so the .k description text is what the writer
+// sees when a complicated value (e.g. a table line specification) is wrong.
+// The value-size limit guards against std::regex stack overflow: the
+// libstdc++ executor recurses per character, so a pattern applied to a
+// very large value crashes.  Typed argument values are short; large
+// values are content (rest, :text) whose types match everything and are
+// excluded by matches_all() anyway.
+const size_t validation_size_limit = 4096;
+
+void Parameter_set::validate(
+    const Parameter& parameter, const std::string& value, const Locator& loc)
+{
+    if (value.empty() || value.size() > validation_size_limit) {
+        return;
+    }
+    const Argtype& argtype = parameter.m_argtype;
+    if (argtype.matches_all()) {
+        return;
+    }
+    if (!std::regex_match(value, argtype.m_regex)) {
+        std::stringstream ss {};
+        ss << "The value \"" << value << "\" given for the argument \""
+           << parameter.m_name << "\" does not match the \"" << argtype.m_name
+           << "\" argument type:\n\n"
+           << trim(argtype.m_desc) << "\n";
+        throw Argument_error(ss.str(), loc, false);
+    }
+}
+
+const Parameter* Parameter_set::find(const std::string& name) const
+{
+    for (const auto& params : {&m_positional, &m_optional, &m_rest}) {
+        for (const Parameter& p : *params) {
+            if (p.m_name == name) {
+                return &p;
+            }
+        }
+    }
+    return nullptr;
+}
+
 // Parameter/argument substitution

 std::string replace_arguments(
--- a/mac/argument_set.h
+++ b/mac/argument_set.h
@@ -34,6 +34,9 @@ public:
        const std::vector<std::vector<Katom>>& optional,
        const std::vector<Katom>& rest,
        const Locator& loc);
+    const Parameter* find(const std::string& name) const;
+    static void validate(
+        const Parameter& parameter, const std::string& value, const Locator& loc);
    bool empty() const { return m_katoms.size() == 0; };

    std::vector<Katom> m_katoms {};
--- a/mac/argv.cpp
+++ b/mac/argv.cpp
@@ -145,6 +145,40 @@ void Argv::opt(const std::string& name, const std::string& desc, const std::stri
    update_width(arg);
 }

+void Argv::var(const std::string& name, const std::string& desc)
+{
+    (void)K::log(2, name, desc);
+    Arg arg {};
+    arg.m_type = "var";
+    arg.m_name = name;
+    arg.m_desc = get_regex_desc(desc);
+    arg.m_syntax = arg.symbol();
+    m_args[name] = arg;
+    m_names.push_back(name);
+    m_var_names.push_back(name);
+    m_hyphen_markers.push_back(flag_name(name));
+    update_width(arg);
+}
+
+void Argv::parse_vars(strings_t& words, string_map& named_args)
+{
+    for (const std::string& name : m_var_names) {
+        auto it = std::ranges::find(words, flag_name(name));
+        named_args[name] = "";
+        if (it == words.end()) {
+            continue;
+        }
+        m_given.insert(name);
+        auto first = it + 1;
+        auto last = first;
+        while (last != words.end() && !(*last).empty() && (*last)[0] != '-') {
+            last++;
+        }
+        named_args[name] = join(strings_t(first, last), " ");
+        words.erase(it, last);
+    }
+}
+
 void Argv::usage_line(Arg arg)
 {
    std::cout.fill(' ');
@@ -330,6 +364,7 @@ Argv::classify_arguments(int argc, char* argv[], bool full_parse)
    if (full_parse) {
        check_flags_and_options(argv[0], words);
    }
+    parse_vars(words, named_args);
    parse_flags(words, named_args);
    parse_optional(words, named_args);
    parse_positional(argv_to_string(argc, argv), join(words, " "), named_args);
--- a/mac/argv.h
+++ b/mac/argv.h
@@ -3,6 +3,7 @@
 // Delusions of generality, but it's really just for Klammertext commands.

 #include <map>
+#include <set>
 #include <ranges>
 #include <algorithm>
 #include <regex>
@@ -52,12 +53,23 @@ public:
    void flag(const std::string& name, const std::string& desc);
    void req(const std::string& name, const std::string& desc, const std::string& regex_pattern="'text'");
    void opt(const std::string& name, const std::string& desc="", const std::string& parameter="", const std::string& default_value="", const std::string& regex_pattern="text");
+    // A variadic option: --name collects every following word up to the
+    // next -/-- token (zero or more).  get(name) returns the words
+    // space-joined; given(name) distinguishes "--name with no words"
+    // from an absent --name.  Used for subcommand-style interfaces
+    // (kdesc --font install <dir>).
+    void var(const std::string& name, const std::string& desc);

    void update_width(Arg arg);

    void check_flags_and_options(std::string command, std::vector<std::string>& words);
    void parse_flags(std::vector<std::string>& words, std::map<std::string, std::string>& named_args);
    void parse_optional(std::vector<std::string>& words, std::map<std::string, std::string>& named_args);
+    void parse_vars(std::vector<std::string>& words, std::map<std::string, std::string>& named_args);
+
+    // True when the named variadic option appeared on the command line
+    // (even with no following words).
+    bool given(const std::string& name) { return m_given.contains(name); };

    void parse_positional(
        std::string command, // std::vector<std::string> words,
@@ -98,6 +110,8 @@ public:
    std::vector<std::string> m_req_names {};
    std::vector<std::string> m_flag_names {};
    std::vector<std::string> m_opt_names {};
+    std::vector<std::string> m_var_names {};
+    std::set<std::string> m_given {};
    std::vector<std::string> m_hyphen_markers {};
    long unsigned int m_syntax_size = 0;
 };
--- a/mac/env/makefile.env.hollis.DISABLED
+++ b/mac/env/makefile.env.hollis.DISABLED
@@ -1,46 +0,0 @@
-KLAMMERTEXT_HOME = /home/ack/projects/klammertext/K
-
-include $(KLAMMERTEXT_HOME)/mac/env/optimize.env
-
-CPP_VERSION = c++20
-
-#GCC_LIB = /usr/lib/gcc/x86_64-linux-gnu/7.4.0
-CXX = /usr/bin/g++
-
-#IMPORT = -fmodules -fsearch-include-path bits/std.cc
-IMPORT = 
-
-# Hack for now; to be generalized:
-ifneq ("$(wildcard /usr/include/python3.14)","")
-    PYTHON = python3.14
-else ifneq ("$(wildcard /usr/include/python3.13)","")
-    PYTHON = python3.13
-else
-    PYTHON = python3.12
-endif
-
-# -no-pie?
-CXXFLAGS =  -Wall -Wextra -Weffc++ -fPIC $(PROFILE) -std=$(CPP_VERSION) $(IMPORT) $(OPTIMIZE) \
-I$(KLAMMERTEXT_HOME)/mac \
-I/usr/include \
-I/usr/include/$(PYTHON)
-
-# -L$(GCC_LIB) \
-
-LDFLAGS = \
-L/usr/lib/x86_64-linux-gnu
-
-LDLIBS = \
-ldl
-
-ifndef NOPYTHON
-LDLIBS += -l$(PYTHON)
-endif
-
-#GCC_ROOT = /h/dev/pkg/gcc-$(GCC_VERSION)
-#GCC_LIB = $(GCC_ROOT)/$(GCC_DIR)/lib/gcc/$(GCC_DIR)/$(GCC_VERSION)
-#$(GCC_LIB)
-
-LD_LIBRARY_PATH=\
-/usr/lib64\
-:/usr/lib/x86_64-linux-gnu
--- a/mac/env/makefile.env.jatke.DISABLED
+++ b/mac/env/makefile.env.jatke.DISABLED
@@ -1,33 +0,0 @@
-KLAMMERTEXT_HOME = /home/ack/projects/klammertext/K
-
-include $(KLAMMERTEXT_HOME)/mac/env/optimize.env
-
-CPP_VERSION = c++20
-
-CXX = /usr/bin/g++
-
-# Hack for now; to be generalized:
-ifneq ("$(wildcard /usr/include/python3.14)","")
-    PYTHON = python3.14
-else ifneq ("$(wildcard /usr/include/python3.13)","")
-    PYTHON = python3.13
-else
-    PYTHON = python3.12
-endif
-
-CPPFLAGS = \
-I$(KLAMMERTEXT_HOME)/mac \
-I/usr/include \
-I/usr/include/$(PYTHON)
-
-CXXFLAGS = -Wall -Wextra -Weffc++ -Wshadow -std=$(CPP_VERSION) -fPIC $(OPTIMIZE) $(SANITIZE)
-
-LDFLAGS = \
-L/usr/lib/x86_64-linux-gnu
-
-LDLIBS = \
-ldl
-
-ifndef NOPYTHON
-LDLIBS += -l$(PYTHON)
-endif
--- a/mac/env/makefile.env.pop.DISABLED
+++ b/mac/env/makefile.env.pop.DISABLED
@@ -1,33 +0,0 @@
-KLAMMERTEXT_HOME = /home/ack/projects/klammertext/K
-
-include $(KLAMMERTEXT_HOME)/mac/env/optimize.env
-
-CPP_VERSION = c++20
-
-CXX = /usr/bin/g++
-
-# Hack for now; to be generalized:
-ifneq ("$(wildcard /usr/include/python3.14)","")
-    PYTHON = python3.14
-else ifneq ("$(wildcard /usr/include/python3.13)","")
-    PYTHON = python3.13
-else
-    PYTHON = python3.12
-endif
-
-CPPFLAGS = \
-I$(KLAMMERTEXT_HOME)/mac \
-I/usr/include \
-I/usr/include/$(PYTHON)
-
-CXXFLAGS = -Wall -Wextra -Weffc++ -Wshadow -std=$(CPP_VERSION) -fPIC $(OPTIMIZE) $(SANITIZE)
-
-LDFLAGS = \
-L/usr/lib/x86_64-linux-gnu
-
-LDLIBS = \
-ldl
-
-ifndef NOPYTHON
-LDLIBS += -l$(PYTHON)
-endif
--- a/mac/env/makefile.env.ubuntu.DISABLED
+++ b/mac/env/makefile.env.ubuntu.DISABLED
@@ -1,33 +0,0 @@
-KLAMMERTEXT_HOME = /home/ack/projects/klammertext/K
-
-include $(KLAMMERTEXT_HOME)/mac/env/optimize.env
-
-CPP_VERSION = c++20
-
-CXX = /usr/bin/g++
-
-# Hack for now; to be generalized:
-ifneq ("$(wildcard /usr/include/python3.14)","")
-    PYTHON = python3.14
-else ifneq ("$(wildcard /usr/include/python3.13)","")
-    PYTHON = python3.13
-else
-    PYTHON = python3.12
-endif
-
-CPPFLAGS = \
-I$(KLAMMERTEXT_HOME)/mac \
-I/usr/include \
-I/usr/include/$(PYTHON)
-
-CXXFLAGS = -Wall -Wextra -Weffc++ -Wshadow -std=$(CPP_VERSION) -fPIC $(OPTIMIZE) $(SANITIZE)
-
-LDFLAGS = \
-L/usr/lib/x86_64-linux-gnu
-
-LDLIBS = \
-ldl
-
-ifndef NOPYTHON
-LDLIBS += -l$(PYTHON)
-endif
--- a/mac/font_store.cpp
+++ b/mac/font_store.cpp
@@ -0,0 +1,602 @@
+// The Klammertext font store: INFRASTRUCTURE, not part of the
+// Klammermachine (the Machine class never references it) and not part of
+// any klammer set.  Klammer sets (the SKS's @document, a future music
+// set) consume the store; the kdesc command lists, installs into, and
+// samples it without loading any klammer set.  The store's search runs
+// over the KLAMMERTEXT_FONTS directories and ends at the distribution's
+// default font set in $KLAMMERTEXT_HOME/fnt.
+
+#include "font_store.h"
+#include "file.h"
+#include "locator.h"
+#include "util.h"
+#include "error.h"
+#include "log.h"
+#include "show.h"
+
+#include <algorithm>
+#include <fstream>
+#include <regex>
+#include <set>
+#include <sstream>
+#include <filesystem>
+
+namespace fs = std::filesystem;
+
+
+std::string name_to_dirname(std::string name)
+{
+    std::string result {};
+    for (char c : name) {
+        if (c == ' ')
+            result += '-';
+        else
+            result += std::tolower(c);
+    }
+    return result;
+}
+
+
+// The directories searched for installed fonts: the colon-separated
+// KLAMMERTEXT_FONTS environment variable, or ~/.klammertext/fonts when it
+// is not set.  Directories are searched in listed order, and the default
+// fonts in $KLAMMERTEXT_HOME/fnt are searched last, so an installed font
+// can deliberately shadow a default one.
+strings_t installed_font_dirs()
+{
+    strings_t result {};
+    std::string paths {};
+    const char* env = std::getenv("KLAMMERTEXT_FONTS");
+    if (env && *env) {
+        paths = env;
+    } else if (const char* home = std::getenv("HOME"); home && *home) {
+        paths = std::string(home) + "/.klammertext/fonts";
+    }
+    std::stringstream ss(paths);
+    std::string dir;
+    while (std::getline(ss, dir, ':')) {
+        if (!dir.empty()) {
+            result.push_back(dir);
+        }
+    }
+    return result;
+}
+
+std::string default_font_dir()
+{
+    const char* home = std::getenv(klammertext_home_var.c_str());
+    if (home == nullptr || *home == '\0') {
+        throw Argument_error(
+            "The environment variable " + klammertext_home_var + " is not defined");
+    }
+    return std::string(home) + "/fnt";
+}
+
+
+static void classify_from_css(Resolved_font& font, std::string css_path)
+{
+    // Parse the @font-face blocks in the CSS to determine variant → filename mapping
+    std::string css = string_from_file(css_path);
+    std::regex face_rgx(
+        R"(@font-face\s*\{[^}]*font-style:\s*(\w+);[^}]*font-weight:\s*(\w+);[^}]*url\('([^']+\.ttf)'\)[^}]*\})",
+        std::regex::multiline);
+    auto begin = std::sregex_iterator(css.begin(), css.end(), face_rgx);
+    auto end = std::sregex_iterator();
+    for (auto it = begin; it != end; ++it) {
+        std::string style = (*it)[1];
+        std::string weight = (*it)[2];
+        std::string url_path = (*it)[3];
+        // URL is like 'dir-name/Filename.ttf' — extract just the filename
+        std::string filename = url_path.substr(url_path.rfind('/') + 1);
+        bool is_bold = (weight == "700" || weight == "bold");
+        bool is_italic = (style == "italic" || style == "oblique");
+        if (is_bold && is_italic)
+            font.bold_italic = filename;
+        else if (is_bold)
+            font.bold = filename;
+        else if (is_italic)
+            font.italic = filename;
+        else
+            font.regular = filename;
+    }
+}
+
+// Resolve a font within one base directory: <base>/<dir-name>/ holding the
+// .ttf files and <base>/<dir-name>.css declaring the @font-face variants.
+static Resolved_font resolve_in_directory(
+    const std::string& family_name, const std::string& dir_name, const std::string& base_dir)
+{
+    std::string font_dir = base_dir + "/" + dir_name;
+    std::string css_file = font_dir + ".css";
+    if (fs::exists(font_dir) && fs::exists(css_file)) {
+        Resolved_font font {};
+        font.family_name = family_name;
+        font.dir_name = dir_name;
+        font.font_dir = font_dir;
+        font.css_file = css_file;
+        classify_from_css(font, css_file);
+        return font;
+    }
+    return {};
+}
+
+// Every font available for the three @document role parameters: each
+// <name>.css with a matching <name>/ directory, across the installed
+// directories and the default font set.  The reported name is the family name
+// from the CSS (what the writer types), falling back to the directory name.
+strings_t available_font_families()
+{
+    strings_t result {};
+    static const std::regex family_rgx(R"(font-family:\s*'([^']+)')");
+    auto scan = [&](const std::string& base) {
+        if (!fs::exists(base)) {
+            return;
+        }
+        for (auto& entry : fs::directory_iterator(base)) {
+            if (entry.path().extension() == ".css" &&
+                fs::is_directory(base + "/" + entry.path().stem().string())) {
+                std::string css = string_from_file(entry.path());
+                std::smatch match {};
+                if (std::regex_search(css, match, family_rgx)) {
+                    result.push_back(match[1]);
+                } else {
+                    result.push_back(entry.path().stem());
+                }
+            }
+        }
+    };
+    for (const std::string& dir : installed_font_dirs()) {
+        scan(dir);
+    }
+    scan(default_font_dir());
+    std::sort(result.begin(), result.end());
+    result.erase(std::unique(result.begin(), result.end()), result.end());
+    return result;
+}
+
+
+static void extract_font_metrics(Resolved_font& font)
+{
+    if (font.regular.empty() || font.font_dir.empty())
+        return;
+    std::string ttf_path = font.font_dir + "/" + font.regular;
+    if (!fs::exists(ttf_path))
+        return;
+    // Extract both x-height and cap-height ratios from OS/2 table
+    std::string script =
+        "python3 -c \""
+        "import struct; "
+        "f = open('" + ttf_path + "', 'rb'); "
+        "_, n = struct.unpack('>IH', f.read(6)); "
+        "f.read(6); "
+        "t = {};\n"
+        "for _ in range(n):\n"
+        "    tag = f.read(4).decode('latin-1').strip('\\\\x00'); "
+        "    _, o, l = struct.unpack('>III', f.read(12)); "
+        "    t[tag] = o\n"
+        "f.seek(t['head'] + 18); "
+        "upm = struct.unpack('>H', f.read(2))[0]; "
+        "f.seek(t['OS/2']); "
+        "ver = struct.unpack('>H', f.read(2))[0]; "
+        "f.seek(t['OS/2'] + 86); "
+        "xh, ch = struct.unpack('>hh', f.read(4)); "
+        "print(f'{xh/upm:.4f} {ch/upm:.4f}') if ver >= 2 else None; "
+        "f.close()\"";
+    std::string result = trim(exec(script.c_str()));
+    if (!result.empty()) {
+        try {
+            auto pos = result.find(' ');
+            if (pos != std::string::npos) {
+                font.xheight_ratio = std::stof(result.substr(0, pos));
+                font.capheight_ratio = std::stof(result.substr(pos + 1));
+            }
+        } catch (...) {}
+    }
+}
+
+Resolved_font resolve_font(std::string family_name)
+{
+    if (family_name.empty())
+        return {};
+
+    std::string dir_name = name_to_dirname(family_name);
+
+    // Installed directories in listed order, then the default font set, so an
+    // installed font can shadow a default one.
+    strings_t bases = installed_font_dirs();
+    bases.push_back(default_font_dir());
+    for (const std::string& base : bases) {
+        Resolved_font font = resolve_in_directory(family_name, dir_name, base);
+        if (!font.family_name.empty()) {
+            extract_font_metrics(font);
+            return font;
+        }
+    }
+
+    std::stringstream ss {};
+    ss << "The font \"" << family_name << "\" is not installed.\n\n"
+       << "Available fonts:\n";
+    for (const std::string& name : available_font_families()) {
+        ss << "  " << name << "\n";
+    }
+    ss << "\nFonts are searched in the directories of the KLAMMERTEXT_FONTS\n"
+       << "environment variable (colon-separated; default $HOME/.klammertext/fonts)\n"
+       << "and then in the default font set.  To install a font,\n"
+       << "place its files as <fonts-dir>/" << dir_name << "/*.ttf with a\n"
+       << "<fonts-dir>/" << dir_name << ".css declaring its @font-face variants.";
+    throw Argument_error(ss.str());
+}
+
+
+// Font file classification: read the family name, weight, and style from
+// the font's internal tables (sfnt 'name', 'OS/2', 'fvar') rather than
+// from filenames, which vary by source (Google zips, foundries, ...).
+
+namespace {
+
+uint16_t be16(const std::string& d, size_t off)
+{
+    return (uint8_t(d[off]) << 8) | uint8_t(d[off + 1]);
+}
+
+uint32_t be32(const std::string& d, size_t off)
+{
+    return (uint32_t(be16(d, off)) << 16) | be16(d, off + 2);
+}
+
+std::string read_binary_file(const std::string& path)
+{
+    std::ifstream in(path, std::ios::binary);
+    std::stringstream ss {};
+    ss << in.rdbuf();
+    return ss.str();
+}
+
+// Decode a name-table string: UTF-16BE for Windows records (keep the BMP
+// low bytes; family names are almost always Latin), bytes as-is otherwise.
+std::string decode_name(const std::string& raw, bool utf16be)
+{
+    std::string result {};
+    if (utf16be) {
+        for (size_t i = 0; i + 1 < raw.size(); i += 2) {
+            if (raw[i] == 0) {
+                result += raw[i + 1];
+            }
+        }
+    } else {
+        result = raw;
+    }
+    return result;
+}
+
+} // namespace
+
+Font_file classify_font_file(const std::string& path)
+{
+    Font_file file {};
+    file.path = path;
+    file.extension = fs::path(path).extension();
+
+    std::string d = read_binary_file(path);
+    if (d.size() < 12) {
+        file.note = "not a font file (too short)";
+        return file;
+    }
+    uint32_t tag = be32(d, 0);
+    if (tag == 0x74746366) {  // 'ttcf'
+        file.note = "font collections (.ttc) are not supported; "
+                    "use the individual font files";
+        return file;
+    }
+    if (tag != 0x00010000 && tag != 0x4F54544F) {  // sfnt or 'OTTO'
+        file.note = "not a TrueType or OpenType font";
+        return file;
+    }
+
+    uint16_t num_tables = be16(d, 4);
+    std::map<std::string, std::pair<uint32_t, uint32_t>> tables {};  // tag -> offset,length
+    for (uint16_t i = 0; i < num_tables; i++) {
+        size_t rec = 12 + i * 16;
+        if (rec + 16 > d.size()) {
+            break;
+        }
+        tables[d.substr(rec, 4)] = { be32(d, rec + 8), be32(d, rec + 12) };
+    }
+    file.variable = tables.contains("fvar");
+
+    // Family name from the 'name' table: typographic family (16) wins
+    // over family (1); Windows records (platform 3) win over Macintosh.
+    if (auto it = tables.find("name"); it != tables.end()) {
+        size_t base = it->second.first;
+        uint16_t count = be16(d, base + 2);
+        uint16_t string_offset = be16(d, base + 4);
+        int best_rank = -1;
+        for (uint16_t i = 0; i < count; i++) {
+            size_t rec = base + 6 + i * 12;
+            if (rec + 12 > d.size()) {
+                break;
+            }
+            uint16_t platform = be16(d, rec);
+            uint16_t name_id = be16(d, rec + 6);
+            uint16_t length = be16(d, rec + 8);
+            uint16_t offset = be16(d, rec + 10);
+            if (name_id != 1 && name_id != 16) {
+                continue;
+            }
+            int rank = (name_id == 16 ? 2 : 0) + (platform == 3 ? 1 : 0);
+            size_t at = base + string_offset + offset;
+            if (rank > best_rank && at + length <= d.size()) {
+                file.family = decode_name(d.substr(at, length), platform == 3);
+                best_rank = rank;
+            }
+        }
+    }
+    if (file.family.empty()) {
+        file.note = "no family name found in the font's name table";
+        return file;
+    }
+
+    bool italic = false;
+    if (auto it = tables.find("OS/2"); it != tables.end()) {
+        size_t base = it->second.first;
+        file.weight = be16(d, base + 4);
+        italic = be16(d, base + 62) & 0x0001;  // fsSelection italic bit
+    } else if (auto ht = tables.find("head"); ht != tables.end()) {
+        uint16_t mac_style = be16(d, ht->second.first + 44);
+        file.weight = (mac_style & 0x0001) ? 700 : 400;
+        italic = mac_style & 0x0002;
+    }
+
+    if (file.variable) {
+        // A variable font covers the weight axis; use it as the regular
+        // (or italic) face and let renderers derive weights.
+        file.variant = italic ? "Italic" : "Regular";
+    } else if (file.weight >= 380 && file.weight <= 450) {
+        file.variant = italic ? "Italic" : "Regular";
+    } else if (file.weight >= 650 && file.weight <= 760) {
+        file.variant = italic ? "BoldItalic" : "Bold";
+    } else {
+        std::stringstream note {};
+        note << "weight " << file.weight
+             << " not installed (only regular 400 and bold 700 are used)";
+        file.note = note.str();
+    }
+    return file;
+}
+
+std::vector<Font_file> classify_font_files(const std::string& directory)
+{
+    std::vector<Font_file> result {};
+    if (!fs::exists(directory)) {
+        throw Argument_error(
+            "The font directory \"" + directory + "\" does not exist");
+    }
+    for (auto& entry : fs::recursive_directory_iterator(directory)) {
+        std::string ext = entry.path().extension();
+        if (entry.is_regular_file() && (ext == ".ttf" || ext == ".otf")) {
+            result.push_back(classify_font_file(entry.path()));
+        }
+    }
+    return result;
+}
+
+// The css is always generated, never copied, so its urls are relative and
+// the installed pair stays relocatable.
+static std::string font_face_css(
+    const std::string& family, const std::string& dir_name,
+    const std::map<std::string, const Font_file*>& slots)
+{
+    std::stringstream css {};
+    auto emit = [&](const std::string& variant,
+                    const std::string& style, const std::string& weight) {
+        auto it = slots.find(variant);
+        if (it == slots.end()) {
+            return;
+        }
+        std::string format =
+            it->second->extension == ".otf" ? "opentype" : "truetype";
+        css << "\n@font-face {\n"
+            << "  font-family: '" << family << "';\n"
+            << "  font-style: " << style << ";\n"
+            << "  font-weight: " << weight << ";\n"
+            << "  src: url('" << dir_name << "/" << variant
+            << it->second->extension << "') format('" << format << "');\n"
+            << "}\n";
+    };
+    emit("Regular", "normal", "400");
+    emit("Bold", "normal", "700");
+    emit("Italic", "italic", "400");
+    emit("BoldItalic", "italic", "700");
+    return css.str();
+}
+
+std::string install_fonts(const std::string& source_dir, std::string dest_dir)
+{
+    if (dest_dir.empty()) {
+        strings_t dirs = installed_font_dirs();
+        if (dirs.empty()) {
+            throw Argument_error(
+                "No installation directory: KLAMMERTEXT_FONTS is empty and "
+                "HOME is not set");
+        }
+        dest_dir = dirs[0];
+    }
+    std::vector<Font_file> files = classify_font_files(source_dir);
+    if (files.empty()) {
+        throw Argument_error(
+            "No font files (.ttf or .otf) found under \"" + source_dir + "\"");
+    }
+
+    // Choose one file per (family, variant) slot; a static face wins over
+    // a variable font's derived face.
+    std::map<std::string, std::map<std::string, const Font_file*>> families {};
+    std::stringstream report {};
+    for (const Font_file& file : files) {
+        if (file.variant.empty()) {
+            report << "  skipped " << fs::path(file.path).filename().string()
+                   << ": " << file.note << "\n";
+            continue;
+        }
+        auto& slots = families[file.family];
+        auto it = slots.find(file.variant);
+        if (it == slots.end() || (it->second->variable && !file.variable)) {
+            slots[file.variant] = &file;
+        }
+    }
+
+    for (auto& [family, slots] : families) {
+        std::string dir_name = name_to_dirname(family);
+        std::string family_dir = dest_dir + "/" + dir_name;
+        fs::create_directories(family_dir);
+        strings_t variants {};
+        for (auto& [variant, file] : slots) {
+            copy_file_stream(file->path,
+                             family_dir + "/" + variant + file->extension);
+            variants.push_back(variant + (file->variable ? " (variable)" : ""));
+        }
+        string_to_file(dest_dir + "/" + dir_name + ".css",
+                       font_face_css(family, dir_name, slots));
+        report << "  installed \"" << family << "\" (" << join(variants, ", ")
+               << ") in " << family_dir << "\n";
+    }
+    return report.str();
+}
+
+std::string describe_fonts()
+{
+    std::stringstream ss {};
+    std::set<std::string> seen {};
+    strings_t bases = installed_font_dirs();
+    bases.push_back(default_font_dir());
+    for (size_t i = 0; i < bases.size(); i++) {
+        const std::string& base = bases[i];
+        bool is_default = (i == bases.size() - 1);
+        ss << base << (is_default ? " (default font set)" : "") << ":\n";
+        if (!fs::exists(base)) {
+            ss << "  [directory does not exist]\n";
+            continue;
+        }
+        strings_t names {};
+        for (auto& entry : fs::directory_iterator(base)) {
+            if (entry.path().extension() == ".css" &&
+                fs::is_directory(base + "/" + entry.path().stem().string())) {
+                names.push_back(entry.path().stem());
+            }
+        }
+        std::sort(names.begin(), names.end());
+        if (names.empty()) {
+            ss << "  [no fonts]\n";
+        }
+        for (const std::string& dir_name : names) {
+            Resolved_font font = resolve_in_directory("?", dir_name, base);
+            std::string css = string_from_file(font.css_file);
+            std::smatch match {};
+            std::string family = dir_name;
+            if (std::regex_search(css, match,
+                                  std::regex(R"(font-family:\s*'([^']+)')"))) {
+                family = match[1];
+            }
+            strings_t variants {};
+            if (!font.regular.empty()) variants.push_back("Regular");
+            if (!font.bold.empty()) variants.push_back("Bold");
+            if (!font.italic.empty()) variants.push_back("Italic");
+            if (!font.bold_italic.empty()) variants.push_back("BoldItalic");
+            ss << "  " << family << " (" << join(variants, ", ") << ")";
+            if (seen.contains(dir_name)) {
+                ss << "  [shadowed by an earlier directory]";
+            }
+            seen.insert(dir_name);
+            ss << "\n";
+        }
+    }
+    return ss.str();
+}
+
+std::string write_font_samples(const std::string& output_dir, const std::string& source_dir)
+{
+    fs::create_directories(output_dir);
+    strings_t families {};
+    if (source_dir.empty()) {
+        for (const std::string& family : available_font_families()) {
+            install_resolved_font(resolve_font(family), output_dir);
+            families.push_back(family);
+        }
+    } else {
+        // Uninstalled preview: install the classified fonts directly into
+        // the sample page's own fonts directory.
+        install_fonts(source_dir, output_dir + "/fonts");
+        for (auto& entry : fs::directory_iterator(output_dir + "/fonts")) {
+            if (entry.path().extension() == ".css") {
+                std::string css = string_from_file(entry.path());
+                std::smatch match {};
+                if (std::regex_search(css, match,
+                                      std::regex(R"(font-family:\s*'([^']+)')"))) {
+                    families.push_back(match[1]);
+                }
+            }
+        }
+        std::sort(families.begin(), families.end());
+    }
+
+    std::stringstream html {};
+    html << "<!DOCTYPE html>\n<html lang=\"en\">\n<head>\n"
+         << "<meta charset=\"UTF-8\">\n<title>Klammertext font samples</title>\n";
+    for (const std::string& family : families) {
+        html << "<link href=\"fonts/" << name_to_dirname(family)
+             << ".css\" rel=\"stylesheet\">\n";
+    }
+    html << "<style>\n"
+         << "body { margin: 2rem auto; max-width: 46rem; font-family: sans-serif; }\n"
+         << "h2 { border-bottom: 1px solid #999; margin-top: 2.5rem; }\n"
+         << ".sample { font-size: 1.3rem; margin: .3rem 0; }\n"
+         << ".alphabet { font-size: 1.0rem; color: #333; margin: .3rem 0; }\n"
+         << "</style>\n</head>\n<body>\n<h1>Klammertext font samples</h1>\n";
+    for (const std::string& family : families) {
+        html << "<h2>" << family << "</h2>\n"
+             << "<div style=\"font-family: '" << family << "'\">\n"
+             << "<p class=\"sample\">The quick brown fox jumps over the lazy dog.</p>\n"
+             << "<p class=\"sample\" style=\"font-style: italic\">"
+             << "The quick brown fox jumps over the lazy dog.</p>\n"
+             << "<p class=\"sample\" style=\"font-weight: bold\">"
+             << "The quick brown fox jumps over the lazy dog.</p>\n"
+             << "<p class=\"sample\" style=\"font-weight: bold; font-style: italic\">"
+             << "The quick brown fox jumps over the lazy dog.</p>\n"
+             << "<p class=\"alphabet\">ABCDEFGHIJKLMNOPQRSTUVWXYZ "
+             << "abcdefghijklmnopqrstuvwxyz 0123456789 "
+             << "&auml;&ouml;&uuml;&szlig; &ldquo;quoted&rdquo; 3.14159</p>\n"
+             << "</div>\n";
+    }
+    html << "</body>\n</html>\n";
+    std::string index = output_dir + "/index.html";
+    string_to_file(index, html.str());
+    return index;
+}
+
+// Font assets are copied with copy_file_stream() (mac/file.h) rather than
+// std::filesystem::copy_file, which fails on Apple `container` virtiofs mounts
+// — see the note on copy_file_stream() in file.cpp for the full rationale.
+
+
+void install_resolved_font(const Resolved_font& font, std::string output_dir)
+{
+    if (font.family_name.empty())
+        return;
+
+    std::string output_font_dir = output_dir + "/fonts";
+    if (!fs::exists(output_font_dir))
+        fs::create_directory(output_font_dir);
+
+    // Copy .css file and font directory to output
+    std::string dest_css = output_font_dir + "/" + font.dir_name + ".css";
+    std::string dest_dir = output_font_dir + "/" + font.dir_name;
+
+    copy_file_stream(font.css_file, dest_css);
+
+    if (!fs::exists(dest_dir)) {
+        fs::create_directory(dest_dir);
+        for (auto& entry : fs::directory_iterator(font.font_dir)) {
+            copy_file_stream(entry.path(),
+                             dest_dir + "/" + entry.path().filename().string());
+        }
+    }
+}
--- a/mac/font_store.h
+++ b/mac/font_store.h
@@ -0,0 +1,59 @@
+#pragma once
+
+// The Klammertext font store (infrastructure; see font_store.cpp).
+
+#include <string>
+#include <vector>
+
+struct Resolved_font {
+    std::string family_name {};   // "Crimson Pro"
+    std::string dir_name {};      // "crimson-pro"
+    std::string font_dir {};      // Full path to font directory
+    std::string css_file {};      // Full path to .css file
+    // .ttf filenames for each variant (empty if variant not available):
+    std::string regular {};
+    std::string bold {};
+    std::string italic {};
+    std::string bold_italic {};
+    float xheight_ratio = 0.0f;   // x-height / unitsPerEm from OS/2 table
+    float capheight_ratio = 0.0f;  // cap-height / unitsPerEm from OS/2 table
+};
+
+std::string name_to_dirname(std::string name);
+// Directories searched for installed fonts (KLAMMERTEXT_FONTS, default
+// ~/.klammertext/fonts); the default font set is searched after them.
+std::vector<std::string> installed_font_dirs();
+// The distribution's default fonts: $KLAMMERTEXT_HOME/fnt.
+std::string default_font_dir();
+// Every installable font family found across those directories.
+std::vector<std::string> available_font_families();
+Resolved_font resolve_font(std::string family_name);
+void install_resolved_font(const Resolved_font& font, std::string output_dir);
+
+// One font file classified by its internal metadata (name table, OS/2).
+struct Font_file {
+    std::string path {};
+    std::string family {};       // from name table (nameID 16, else 1)
+    std::string variant {};      // Regular | Bold | Italic | BoldItalic
+    std::string extension {};    // ".ttf" or ".otf"
+    bool variable = false;       // has an 'fvar' table
+    int weight = 0;              // OS/2 usWeightClass
+    std::string note {};         // reason when the file is not installable
+};
+
+// Recursively classify every .ttf/.otf under a directory.
+std::vector<Font_file> classify_font_files(const std::string& directory);
+
+// Install the classified families from source_dir into dest_dir (default:
+// the first KLAMMERTEXT_FONTS directory, created if necessary), in the
+// canonical relocatable layout <dest>/<family-kebab>/{Variant}.ttf plus a
+// generated <family-kebab>.css with relative urls.  Returns a report.
+std::string install_fonts(const std::string& source_dir, std::string dest_dir = "");
+
+// Describe every font in the store with provenance and variants.
+std::string describe_fonts();
+
+// Write an HTML specimen page for fonts into output_dir.  With an empty
+// source_dir, samples every available font in the store; otherwise
+// classifies and samples the (possibly uninstalled) fonts in source_dir.
+std::string write_font_samples(const std::string& output_dir, const std::string& source_dir = "");
--- a/mac/machine.cpp
+++ b/mac/machine.cpp
@@ -405,7 +405,7 @@ katom_list Machine::apply_klammer(
    katom_list result(klammer.m_body[target].begin(), klammer.m_body[target].end());
    auto varmap = klammer.m_varmap[target];
    m_state.open_frame("Arguments for klammer " + q_(klammer.m_name));
-    m_state.set(values);
+    m_state.set(values, klammer.m_parameters);
    for (const auto& [name, indices] : varmap) {
        std::regex arg("\\*" + name + "\\*");
        for (auto i : indices) {
--- a/mac/state.cpp
+++ b/mac/state.cpp
@@ -25,9 +25,9 @@ std::vector<std::string> Frame::names() const
 }

 void Frame::set(std::string name, std::string value,
-                std::string delim, std::string desc, Locator loc)
+                std::string delim, std::string desc, Locator loc, Argtype argtype)
 {
-    Var v(name, value, delim, desc, loc);
+    Var v(name, value, delim, desc, loc, argtype);
    m_vars[name] = v;
 }

@@ -70,7 +70,7 @@ void State::close_frame()
 }

 void State::set(std::string name, std::string value, bool update,
-                std::string delim, std::string desc, Locator loc)
+                std::string delim, std::string desc, Locator loc, Argtype argtype)
 {
    if (m_frames.empty()) {
        std::stringstream ss {};
@@ -86,7 +86,7 @@ void State::set(std::string name, std::string value, bool update,
           << q_(current.m_value) << ".";
        throw Argument_error(ss.str(), current.m_loc);
    }
-    m_frames[0].set(name, value, delim, desc, loc);
+    m_frames[0].set(name, value, delim, desc, loc, argtype);
 }

 void State::set(std::map<std::string, std::string> varmap)
@@ -96,6 +96,16 @@ void State::set(std::map<std::string, std::string> varmap)
    }
 }

+void State::set(const std::map<std::string, std::string>& varmap,
+                const Parameter_set& parameters)
+{
+    for (const auto& [name, value] : varmap) {
+        const Parameter* parameter = parameters.find(name);
+        set(name, value, false, " ", "", Locator(),
+            parameter ? parameter->m_argtype : Argtype());
+    }
+}
+

 void State::replace(std::string name, std::string value, bool error_if_not_defined)
 {
@@ -269,13 +279,8 @@ std::string State::python_code()
           << margin << std::left << std::setw(name_length) << "K_eval_id" << " = "
           << State::class_id++ << "\n";
        for (const auto& name : names) {
-            // auto [var_value, argtype] = value_type(name);
-            // ss << argtype.python_value(name, var_value, name_length) << "\n";
-            std::string v = value(name);
-            v = string_replace(v, "\\", "\\\\");
-            v = string_replace(v, "\"", "\\\"");
-            std::string var_value = qq_(v);
-            ss << margin << std::left << std::setw(name_length) << name << " = " << var_value << "\n";
+            Var var = get(name);
+            ss << var.m_argtype.python_value(name, {var.m_value}, name_length) << "\n";
        }
    }
    // msg() << ss.str() << "\n";
--- a/mac/state.h
+++ b/mac/state.h
@@ -15,12 +15,14 @@ class Var
 public:
    Var() = default;
    Var(std::string name, std::string value=klammerstate::no_value,
-        std::string delim=":", std::string desc="", Locator loc=Locator())
+        std::string delim=":", std::string desc="", Locator loc=Locator(),
+        Argtype argtype=Argtype())
        : m_name(name)
        , m_value(value)
        , m_delim(delim)
        , m_desc(desc)
        , m_loc(loc)
+        , m_argtype(argtype)
        {};
    bool defined();

@@ -29,6 +31,7 @@ public:
    std::string m_delim {};
    std::string m_desc {};
    Locator m_loc {};
+    Argtype m_argtype {};
 };

 namespace klammerstate {
@@ -44,7 +47,8 @@ public:

    std::vector<std::string> names() const;
    void set(std::string name, std::string value,
-             std::string delim=":", std::string desc="", Locator loc=Locator());
+             std::string delim=":", std::string desc="", Locator loc=Locator(),
+             Argtype argtype=Argtype());
    std::pair<Var, bool> get(std::string name);

    std::string m_name {};
@@ -58,8 +62,11 @@ public:
    void open_frame(std::string name);
    void close_frame();
    void set(std::string name, std::string value, bool update=false,
-             std::string delim=" ", std::string desc="", Locator loc=Locator());
+             std::string delim=" ", std::string desc="", Locator loc=Locator(),
+             Argtype argtype=Argtype());
    void set(std::map<std::string, std::string> varmap);
+    void set(const std::map<std::string, std::string>& varmap,
+             const Parameter_set& parameters);
    void replace(std::string name, std::string value, bool error_if_not_defined=true);
    void add_environment_frame();
    Var get(std::string name, bool error_if_not_defined=false, Locator loc=Locator());
--- a/sks/document/Makefile
+++ b/sks/document/Makefile
@@ -5,7 +5,7 @@ K := $(KLAMMERTEXT_HOME)
 KS := $(K)/sks
 KM := $(K)/mac

-include $(KM)/env/makefile.env
+include $(K)/env/makefile.env

 # Additional include paths for sks components
 LOCAL_CPPFLAGS := -I$(KM) -I$(KS)/kutil -I$(KS)/target
@@ -23,8 +23,7 @@ LOCAL_DEPFILES := document_class.d document_html.d document_latex.d heading.d re

 # External object files from sks/ (mac/*.o now in libklammertext.so)
 SKS_OBJECTS := $(KS)/kutil/kutil.o $(KS)/kutil/klammer_base.o \
-               $(KS)/target/html_util.o $(KS)/target/latex_util.o \
-               $(KS)/target/font_resolve.o
+               $(KS)/target/html_util.o $(KS)/target/latex_util.o

 ALL_OBJECTS := $(LOCAL_OBJECTS) $(SKS_OBJECTS)

--- a/sks/document/document.k
+++ b/sks/document/document.k
@@ -1,8 +1,10 @@
@@@argtype document_structure |
  Structure of a document: plain, article, or book
  :pattern plain^|article^|book
+  :default plain
@@@

+
@@document.k
 :title
 :subtitle
@@ -19,7 +21,7 @@
 :toc.bool false
 ]#

-:structure.document_structure plain
+:structure.document_structure

 :text
 :files
@@ -38,9 +40,6 @@
 :include_sks_js.bool true
 :include_fonts.bool true

-:local_fonts.list linux-libertine
-:google_fonts.list Inconsolata Open+Sans:wght^@500 Libre+Baskerville
-
 :serif_font Crimson Pro
 :sans_font Open Sans
 :mono_font Inconsolata
--- a/sks/document/document_class.cpp
+++ b/sks/document/document_class.cpp
@@ -62,8 +62,6 @@ Document_class::Document_class(Machine& machine) : Klammer_base(machine)
    m_include_sks_js = strbool(get("include_sks_js"), loc);

    // font_dirs = word_split(get("font_dirs"));
-    m_local_fonts = word_split(get("local_fonts"));
-    m_google_fonts = word_split(get("google_fonts"));

    auto strip_quotes = [](std::string s) {
        if (s.size() >= 2 && s.front() == '"' && s.back() == '"')
--- a/sks/document/document_class.h
+++ b/sks/document/document_class.h
@@ -5,7 +5,7 @@
 #include "latex_util.h"
 #include "machine.h"
 #include "heading.h"
-#include "font_resolve.h"
+#include "font_store.h"

 const std::string closed_symbol { "&^#9656;" };
 const std::string open_symbol { "&^#9662;" };
@@ -120,8 +120,6 @@ public:
    bool m_include_sks_js = true;

    strings_t m_font_dirs {};
-    strings_t m_local_fonts {};
-    strings_t m_google_fonts {};

    std::string m_serif_font {};
    std::string m_sans_font {};
--- a/sks/document/document_html.cpp
+++ b/sks/document/document_html.cpp
@@ -87,8 +87,7 @@ strings_t Document_class::resolved_font_names()
 {
    strings_t result {};
    auto add = [&](const Resolved_font& rf) {
-        if (!rf.family_name.empty() &&
-            std::find(m_local_fonts.begin(), m_local_fonts.end(), rf.dir_name) == m_local_fonts.end())
+        if (!rf.family_name.empty())
            result.push_back(rf.dir_name);
    };
    add(m_resolved_serif);
@@ -101,13 +100,17 @@ std::string Document_class::font_definitions()
 {
    std::stringstream ss {};
    if (!m_serif_font.empty() || !m_sans_font.empty() || !m_mono_font.empty()) {
+        // Family names are quoted: an unquoted name with a digit-initial
+        // word ("Source Sans 3") is invalid CSS, and a font-family using
+        // var() with such a value computes to inherit, silently losing
+        // the font.
        ss << ":root {\n";
        if (!m_serif_font.empty())
-            ss << "    --serif: " << m_serif_font << ", serif;\n";
+            ss << "    --serif: \"" << m_serif_font << "\", serif;\n";
        if (!m_sans_font.empty())
-            ss << "    --sans-serif: " << m_sans_font << ", sans-serif;\n";
+            ss << "    --sans-serif: \"" << m_sans_font << "\", sans-serif;\n";
        if (!m_mono_font.empty())
-            ss << "    --monospace: " << m_mono_font << ", monospace;\n";
+            ss << "    --monospace: \"" << m_mono_font << "\", monospace;\n";
        ss << "}\n";
    }
    // Emit scale factors so sans and mono fonts match the serif font.
@@ -180,7 +183,6 @@ std::string Document_class::create_html_output_directories()
        if (!file_exists(output_directory)) {
            fs::create_directory(output_directory);
        }
-        html::install_local_fonts(m_font_dirs, m_local_fonts, output_directory);
        install_resolved_font(m_resolved_serif, output_directory);
        install_resolved_font(m_resolved_sans, output_directory);
        install_resolved_font(m_resolved_mono, output_directory);
@@ -665,13 +667,9 @@ elements_t Document_class::page(std::string body_text, std::string output_dir, i

    std::string page_title = m_page_title.empty() ? m_title : m_page_title;

-    strings_t all_local_fonts = m_local_fonts;
-    for (auto& name : resolved_font_names())
-        all_local_fonts.push_back(name);
-
    elements_t page = html::make_page(
        body, page_title,
-        css_text, css_filenames, all_local_fonts, m_google_fonts);
+        css_text, css_filenames, resolved_font_names());

    return page;
 }
@@ -734,10 +732,7 @@ std::string Document_class::make_html_navigation_structure(
        m_file_components[0].second,
        m_date, m_version, m_copyright,
        css_text, all_css_files, all_js_files,
-        [&]() { strings_t f = m_local_fonts;
-                for (auto& n : resolved_font_names()) f.push_back(n);
-                return f; }(),
-        m_google_fonts,
+        resolved_font_names(),
        m_logo);
    std::string result = t.str();
    result = string_replace(result,
--- a/sks/font/font.k
+++ b/sks/font/font.k
@@ -12,9 +12,10 @@
  'b' (bold), 's' (sans-serif), 't' (typewriter or monospace) or 'c'
  (code) for each cell in a row. If there are fewer font symbols than
  cells in a row, the last symbol is repeated.  Extra symbols are
-  ignored.  Default is 'r'
+  ignored.
  :pattern ('font'^|\s)+
  :python_cast (lambda s : s.split())
+  :default r
@@@

@@font.k fontname : Switch to an available font for PDF output. @@
--- a/sks/font/font.py
+++ b/sks/font/font.py
@@ -34,7 +34,7 @@ def html_fontify(text, font_symbol, font_size):
    if cls:
        if font_symbol == "c":
            result = re.sub(" ", "&nbsp;", result)
-        cls = f'class="cls"'
+        cls = f'class="{cls}"'
    sty = ""
    if font_size != 1:
        sty = f'style="font-size: {float(font_size) * 100}%"'
--- a/sks/image/image.k
+++ b/sks/image/image.k
@@ -16,6 +16,13 @@
 # @@@argtype pixels | a pixel count :pattern \d+px @@@
 # @@image.k basename : Image read from a file @@
 # @@image.html basename | width | height : @eval import image ; result = image.image(K) eval@ @@
+
+@@@argtype image_hpos |
+  horizontal position of an image
+  :pattern left^|center^|right^|none
+  :default center
+@@@
+
@@image
  basename
  :id
@@ -23,7 +30,7 @@
  @caption_arguments@
  :vmargin.bool true
  :center.bool true
-  :hpos.hpos center
+  :hpos.image_hpos
  :rel
  :abswidth.number 0.0
  :border.bool false
@@ -32,13 +39,13 @@
@@

@@image_grid
-  image_specs.rest
+  image_specs.rest(2)
  :caption
  :number.bool true
  :cell_number.bool false
  :landscape.bool false
  :scale.number 0.98
-  :caption_side.side bottom
+  :caption_side.caption_side
  :caption_side_center.bool true
 #
  :thumbnail.bool false
--- a/sks/image/image.py
+++ b/sks/image/image.py
@@ -122,7 +122,6 @@ class Image(klammer_base.Klammer_base):
        #if self.caption or self.number:
        #    width = "\\textwidth"
        #else:
-        self.number = self.number == "true"
        width = kutil.parse_length("tex", self.width, self.rel_fraction)[0]
        width = re.sub("px", "pt", width)
        #result = f'\\includegraphics[width={width}]{{{source}}}'
--- a/sks/image/image_grid.py
+++ b/sks/image/image_grid.py
@@ -25,11 +25,16 @@ class Kargs:
        self.K_input_filenames = K.K_input_filenames
        self.K_output_dir = K.K_output_dir
        self.K_output_basename = K.K_output_basename
-        self.image_output_dir = K.Image_output_dir
+        self.Image_output_dir = K.Image_output_dir
        self.K_toc_only = False
        self.id = ""
        self.as_string = False
        self.rel = None
+        # Defaults for @image parameters the grid does not use per cell.
+        self.border = False
+        self.vmargin = False
+        self.abswidth = 0.0
+        self.caption_font_size = .9

 def img(K, target, basename, caption, width):
    result = image.Image(
@@ -46,7 +51,7 @@ class Image_grid(klammer_base.Klammer_base):
        self.basenames = []
        self.captions = []

-        for row in kutil.rest_args(self.image_specs, dimensions=2):
+        for row in self.image_specs:
            self.images.append(
                [e.groups() for e in [image_pat.fullmatch(s.strip()) for s in row]])
            self.basenames.append([e[0] for e in self.images[-1]])
--- a/sks/kutil/Makefile
+++ b/sks/kutil/Makefile
@@ -4,7 +4,7 @@
 K := $(KLAMMERTEXT_HOME)
 KM := $(K)/mac

-include $(KM)/env/makefile.env
+include $(K)/env/makefile.env

 # Source files
 SOURCES := kutil.cpp klammer_base.cpp
--- a/sks/kutil/kutil.k
+++ b/sks/kutil/kutil.k
@@ -1,9 +1,15 @@
@@show s : @eval :cpp show show @ @@

+@@@argtype caption_side |
+  the side of its element on which a caption is placed
+  :pattern top^|right^|bottom^|left
+  :default bottom
+@@@
+
@@caption_arguments :
  :caption
  :number.bool true
-  :caption_side.side bottom
+  :caption_side.caption_side
  :caption_font.font i
  :caption_font_size.float .9
@@
@@ -29,14 +35,6 @@
  #:python_cast (lambda s : [__import__("kutil").parse_length("tex", e) for e in s.split()])
@@@

-@@@argtype side | a side of a box
-  :pattern top^|right^|bottom^|left
-@@@
-
-@@@argtype hpos | horizontal position
-  :pattern left^|center^|right^|none
-@@@
-
@@@argtype figure_id |
 an identifier for a figure.

--- a/sks/kutil/kutil.py
+++ b/sks/kutil/kutil.py
@@ -91,20 +91,32 @@ def caption_marker(name, caption, delimiter=" - "):
        caption = f"{delimiter}{caption}"
    return f"{d}{name}{d}{caption}{d}"

+def rest_split(s, dimensions=1):
+    """Split bar-delimited text into nested lists, one level per dimension.
+
+    The delimiter for dimension n is a run of exactly n bar characters:
+    | separates elements, || separates lists of elements, ||| lists of
+    lists, and so on.  This is the cast behind the rest(N) argument type.
+    One trailing top-level delimiter (the customary dangling separator
+    before a closing @) is removed; all other empty elements are
+    preserved, so a trailing | still makes an empty final cell.
+    """
+    s = s.strip()
+    if not s:
+        return [] if dimensions > 0 else s
+    delimiter = "|" * dimensions
+    if s.endswith(delimiter) and not s.endswith("|" + delimiter):
+        s = s[:-len(delimiter)]
+    return _rest_split_level(s, dimensions)
+
+def _rest_split_level(s, dimensions):
+    if dimensions <= 0:
+        return s.strip()
+    pattern = re.compile("(?<!\\|)" + "\\|" * dimensions + "(?!\\|)")
+    return [_rest_split_level(part, dimensions - 1) for part in pattern.split(s)]
+
 def rest_args(s, dimensions=1):
-    if s.endswith("||"):
-        s = s[:-2]
-    s = re.sub(r"\t", r"\\t", s)
-    double_bar_pat = re.compile(r"\|\|")
-    bar_pat = re.compile(r"\s*\|\s*")
-    parts = [e.strip() for e in double_bar_pat.split(s.strip())]
-    for p in parts:
-        elts = bar_pat.split(p.strip())
-        elts = ["~" if (e.strip() == "") else e.strip() for e in elts]
-    result = [bar_pat.split(e) for e in parts]
-    if dimensions == 1:
-        result = result[0]
-    return result
+    return rest_split(s, dimensions)

 def parse_length(target, s, rel_fraction):
    def choose(html_value, tex_value):
--- a/sks/link/link.py
+++ b/sks/link/link.py
@@ -63,7 +63,7 @@ class Link(klammer_base.Klammer_base):
        # self.show("Link")
          
    def html(self):
-        return html_link(self.target, self.text, self.section == "true", self.nq)
+        return html_link(self.target, self.text, self.section, self.nq)

    def tex(self):
        return latex_link(self.target, self.text, self.section, self.nq, self.footnote)
--- a/sks/list/list.k
+++ b/sks/list/list.k
@@ -9,9 +9,9 @@
@@ol.k list_items.rest :cmp.bool false :initial.int 1 : Ordered list, with numbered list elements. @@
@@ol :: @eval list.List(K, "ol") eval@ @@

-@@define descriptions.rest :font i : @eval list.Define(K) eval@ @@
+@@define descriptions.rest(2) :font i : @eval list.Define(K) eval@ @@

-@@columns items.rest :n.int 2 : @eval list.columns(K) eval@ @@
+@@columns items :n.int 2 : @eval list.columns(K) eval@ @@
 ##

 #[
--- a/sks/list/list.py
+++ b/sks/list/list.py
@@ -11,9 +11,7 @@ class List(klammer_base.Klammer_base):
    def __init__(self, K, list_type):
        super().__init__(K)
        self.list_type = list_type
-        self.items = kutil.rest_args(self.list_items)
-        if self.items[-1].strip() == "":
-            self.items = self.items[:-1]
+        self.items = self.list_items
        word_count = max([len(e.strip().split()) for e in self.items])
        self.compressed = False #and word_count < int(self.List_compressed_word_max)
        
@@ -31,11 +29,11 @@ class List(klammer_base.Klammer_base):
        command = {'ol' : 'enumerate', 'ul' : 'itemize'}[self.list_type]
        init = ""
        if self.__dict__.get("initial") and self.initial != 1:
-            init = "\\addtocounter{enumi}{" + str(int(self.initial) - 1) + "}"
+            init = "\\addtocounter{enumi}{" + str(self.initial - 1) + "}"
        #topsep = '[noitemsep,topsep=0pt]'
        topsep = "[noitemsep,topsep=0pt," if self.compressed else "[topsep=0pt,itemsep=2pt,"
        topsep += "leftmargin=16pt]"
-        listsep = '\\setlist{nolistsep}' if self.cmp == 'true' else ''
+        listsep = '\\setlist{nolistsep}' if self.cmp else ''
        result = f'{listsep}\n\\begin{{{command}}}{topsep}{init}\n{body}\n\\end{{{command}}}\n'
        return result

@@ -58,7 +56,7 @@ class List(klammer_base.Klammer_base):
 class Define(klammer_base.Klammer_base):
    def __init__(self, K):
        super().__init__(K)
-        self.items = kutil.rest_args(self.descriptions, 2)
+        self.items = self.descriptions
        #self.show()
        #pprint.pprint(self.items)

--- a/sks/phase/Makefile
+++ b/sks/phase/Makefile
@@ -1,4 +1,4 @@
-include $(KLAMMERTEXT_HOME)/mac/env/makefile.env
+include $(KLAMMERTEXT_HOME)/env/makefile.env

 FLAGS = -std=c++17 -fvisibility=hidden -I $(KLAMMERTEXT_HOME)/src -I$(KLAMMERTEXT_HOME)/sks/kutil $(CXXFLAGS)

--- a/sks/table/indexed_range.py
+++ b/sks/table/indexed_range.py
@@ -0,0 +1,197 @@
+"""Parsing for the indexed_range argument syntax.
+
+An indexed_range selects positions in one dimension of a grid, with an
+optional extent in the other dimension.  The same syntax serves the table
+klammer's :hline and :vline arguments (index = boundary, subsets = how far
+along the line) and its :colspan and :rowspan arguments (index = row or
+column, subsets = the cells to merge).  Which dimension the index selects
+is a property of the argument, not of the syntax.
+
+This module replaces the former sequences.py and span.py (see debris).
+"""
+
+import re
+
+syntax_description = """
+An indexed_range is a selector, optionally followed by parenthesized
+subsets, written with no spaces:
+
+    <selector>              full extent
+    <selector>(<subsets>)   restricted extent
+
+The selector is a single index "3", a closed index range "2-5", an open
+index range "2-" (to the last index), or a name defined by the argument
+(for example "top" or "inner" for table lines).  Subsets are separated by
+commas; each is an index "4", a closed range "1-4", or an open range "6-"
+(to the end).  All indices are zero-origin.
+
+Examples:
+    3            index 3, full extent
+    2-5(0-2)     indices 2 through 5, each restricted to 0 through 2
+    3(1-4,6-9)   index 3, restricted to 1-4 and 6-9
+    head(1-)     with table hline names: boundary 1, from column 1 on
+""".strip()
+
+
+class Range_error(Exception):
+    def __init__(self, message):
+        super().__init__(f"{message}\n\n{syntax_description}")
+
+
+item_rgx = re.compile(r"(?:(\d+)(-)?(\d*)|([A-Za-z]+))(?:\(([\d,\-]+)\))?$")
+subset_rgx = re.compile(r"(\d+)(-)?(\d*)$")
+
+
+def hline_names(count):
+    """Boundary-name map for horizontal lines; count = row_count + 1."""
+    last = count - 1
+    return {"top": [0],
+            "head": [1],
+            "bottom": [last],
+            "inner": list(range(1, last)),
+            "all": list(range(count))}
+
+
+def vline_names(count):
+    """Boundary-name map for vertical lines; count = column_count + 1."""
+    last = count - 1
+    return {"outer": [0, last],
+            "inner": list(range(1, last)),
+            "all": list(range(count))}
+
+
+class Indexed_range:
+    """The selected extent for one primary-dimension index."""
+
+    def __init__(self, index, maxval):
+        self.index = index
+        self.maxval = maxval
+        self.all = False        # Full extent (no subsets given)
+        self.ranges = []        # [[start, end], ...], inclusive
+
+    def add_full(self):
+        self.all = True
+        self.ranges = [[0, self.maxval]]
+
+    def add_ranges(self, ranges):
+        if not self.all:
+            self.ranges += ranges
+
+    def has(self, i):
+        return any(start <= i <= end for start, end in self.ranges)
+
+    def items(self, invert=False):
+        result = []
+        for start, end in self.ranges:
+            for e in range(start, end + 1):
+                result.append((e, self.index) if invert else (self.index, e))
+        return result
+
+    def __str__(self):
+        subsets = ",".join([f"{s}-{e}" for s, e in self.ranges])
+        return f"{self.index}({subsets})"
+
+    def __repr__(self):
+        return self.__str__()
+
+
+class Indexed_ranges:
+    """A parsed indexed_range argument: Indexed_range entries by index.
+
+    count    - number of valid primary indices (0 .. count-1)
+    maxval   - largest valid subset value (the cross dimension)
+    specs    - the argument value: a list of items (from the argtype's
+               python_cast), a whitespace-separated string, or None
+    names    - map of selector names to index lists (hline_names, ...)
+    argument - argument name for error messages (":hline", ...)
+
+    Items targeting the same index merge: their subsets are unioned, and a
+    full-extent item absorbs any subsets.
+    """
+
+    def __init__(self, count, maxval, specs, names=None, argument=""):
+        self.count = count
+        self.maxval = maxval
+        self.names = names or {}
+        self.argument = argument
+        self.by_index = {}
+        if specs is None:
+            specs = []
+        elif isinstance(specs, str):
+            specs = specs.split()
+        for spec in specs:
+            self.parse(spec)
+
+    def error(self, message):
+        argument = f"{self.argument} argument: " if self.argument else ""
+        raise Range_error(f"{argument}{message}")
+
+    def parse(self, spec):
+        match = item_rgx.match(spec)
+        if not match:
+            self.error(f'"{spec}" is not a valid indexed_range.')
+        number, hyphen, end, name, subsets = match.groups()
+        if name is not None:
+            if name not in self.names:
+                known = " ".join(self.names) or "none"
+                self.error(f'"{name}" is not a valid name here '
+                           f"(valid names: {known}).")
+            indices = self.names[name]
+        else:
+            start = int(number)
+            if not hyphen:
+                indices = [start]
+            else:
+                last = int(end) if end else self.count - 1
+                if start > last:
+                    self.error(f'In "{spec}", the index range start {start} '
+                               f"is greater than its end {last}.")
+                indices = list(range(start, last + 1))
+        for i in indices:
+            if i >= self.count:
+                self.error(f'In "{spec}", index {i} is out of range '
+                           f"(0 through {self.count - 1}).")
+        ranges = self.parse_subsets(spec, subsets) if subsets else None
+        for i in indices:
+            entry = self.by_index.setdefault(i, Indexed_range(i, self.maxval))
+            if ranges is None:
+                entry.add_full()
+            else:
+                entry.add_ranges(ranges)
+
+    def parse_subsets(self, spec, subsets):
+        ranges = []
+        for part in subsets.split(","):
+            match = subset_rgx.match(part)
+            if not match:
+                self.error(f'In "{spec}", "{part}" is not a valid subset.')
+            number, hyphen, end = match.groups()
+            start = int(number)
+            if not hyphen:
+                last = start
+            else:
+                last = int(end) if end else self.maxval
+            if start > last:
+                self.error(f'In "{spec}", the subset start {start} '
+                           f"is greater than its end {last}.")
+            if last > self.maxval:
+                self.error(f'In "{spec}", {last} is out of range '
+                           f"(0 through {self.maxval}).")
+            ranges.append([start, last])
+        return ranges
+
+    def __getitem__(self, index):
+        return self.by_index.get(index)
+
+    def __iter__(self):
+        return iter(self.by_index)
+
+    def has(self, index, i):
+        entry = self[index]
+        return entry.has(i) if entry else False
+
+    def __str__(self):
+        return " ".join([str(self.by_index[i]) for i in sorted(self.by_index)])
+
+    def __repr__(self):
+        return self.__str__()
--- a/sks/table/sequences.py
+++ b/sks/table/sequences.py
@@ -1,147 +0,0 @@
-import sys
-import re
-
-syntax_description = """
-
-A "sequence" is an integer (the "index") followed by an optional description of one
-or more sequence subsets.  A subset is defined by a series of subset
-descriptions, separated by a comma.  A subset description is either an integer,
-two integers separated by a hypen to indicate a range, or an integer followed
-only by a hyphen, which will include all the following elements of the sequence to
-the end. No spaces are allowed in a sequence.  All indices are zero-origin.
-
-Sequence examples for an index of "3":
-   3 
-   3(1)
-   3(0-4)
-   3(1-4,6-9)
-   3(5-)
-
-Note that some sequence subsets must include two numbers, for example, border
-lines in a table.
-
-""".strip()
-
-
-class Sequence:
-    def __init__(self, count, maxval, spec):
-        def parse_range(match):
-            start, hyphen, end = match.groups()
-            if hyphen is None and end is None:
-                end = start
-            elif end is None:
-                end = maxval
-            return [int(start), int(end)]
-        self.maxval = maxval
-        self.all = True
-        subset_pat = "[-\\d,]+"
-        sequence_rgx = re.compile(fr"(\d+)(\({subset_pat}\))*")
-        match = sequence_rgx.match(spec)
-        self.spec = spec
-        if match and match.group(0) == spec:
-            range_rgx = re.compile(r"(\d+)(-)?(\d+)?")
-            self.index = int(match.group(1))
-            if (match.group(2)):
-                self.subsets = match.group(2).strip("()").split(",")
-                matches = [range_rgx.match(e) for e in self.subsets]
-                self.ranges = [parse_range(e) if e else None for e in matches]
-                self.all = False
-            else:
-                self.ranges = [[0, self.maxval]]
-        else:
-            print(f'The sequence specification "{spec}" is incorrect.\n\n{syntax_description}\n')
-            sys.exit(1)
-
-    def __str__(self):
-        #subsets = "all" if self.all else ",".join([f"{e[0]}-{e[1]}" for e in self.ranges])
-        subsets = "all" if False else ",".join([f"{e[0]}-{e[1]}" for e in self.ranges])
-        return f"{self.index}[{subsets}]"
-
-    def __repr__(self):
-        return self.__str__()
-
-    def has(self, i):
-        for start, end in self.ranges:
-            if i >= start and i <= end:
-                return True
-        return False
-
-    def items(self, invert=False):
-        result = []
-        for start,end in self.ranges:
-            for e in range(start, end+1):
-                result.append((e, self.index) if invert else (self.index, e))
-        return result
-
-class Sequences:
-    def __init__(self, count, maxval, sequence_specs):
-        self.count = count
-        self.maxval = maxval
-        self.sequences = {}
-        match_all = re.compile(r"\*(.*)").match(sequence_specs)
-        match_some = re.compile(r"\[(\d+)-(\d+)\](.*)").match(sequence_specs)
-        spec_list = []
-        if match_all:
-            subseq = match_all.group(1)
-            for i in range(count):
-                spec_list.append(f"{i}{subseq}")
-        elif match_some:
-            start = int(match_some.group(1))
-            end = int(match_some.group(2))
-            subseq = match_some.group(3)
-            for i in range(start, end+1):
-                spec_list.append(f"{i}{subseq}")
-        else:
-            spec_list = sequence_specs.split()
-        for specs in spec_list:
-            for spec in self.parse_spec(specs):
-                self.sequences[spec.index] = spec
-
-    def __getitem__(self, index):
-        return self.sequences.get(index)
-
-    def has(self, index, subseq_index):
-        return self[index].has(subseq_index) if self[index] else None
-
-    def parse_spec(self, spec):
-        named_spec = { "last" : [str(self.count-1)],
-                       "outer"  : ["0", str(self.count-1)],
-                       "inner"  : [str(e) for e in range(1, self.count - 1)],
-                       "all"    : [str(e) for e in range(0, self.count)]
-                      }.get(spec)
-        if named_spec is None:
-            return [Sequence(self.count, self.maxval, spec)]
-        else:
-            return [Sequence(self.count, self.maxval, e) for e in named_spec]
-
-    def items(self, invert=False):
-        result = []
-        for seq in self.sequences:
-            result += self.sequences[seq].items(invert)
-        return set(result)
-
-if __name__ == "__main__":
-    import pprint
-    for s in [
-            Sequence(10, "0"),
-            Sequence(10, "1"),
-            Sequence(10, "2(2)"),
-            Sequence(10, "3(2-)"),
-            Sequence(10, "4(2-4)"),
-            Sequence(10, "5(2-4)"),
-            Sequence(10, "6(2-4,6)"),
-            Sequence(10, "7(2,6-8)"),
-            Sequence(10, "8(2,7-8,9-11,13-14)")]:
-        print(s.spec, "->", s)
-
-    print("Sequences")
-    S = Sequences(10, "0")
-    for name in "top bottom head outer inner all 1(2-3)".split():
-        print(name, "->", S.parse_spec(name))
-
-    print("Instantiate:")
-    s = Sequences(10, "3(1-2,4-5) 4(8-9)")
-
-    #print(s.items(True))
-    print(s)
-    print(s.has(3,1))
--- a/sks/table/span.py
+++ b/sks/table/span.py
@@ -1,111 +0,0 @@
-import sys
-import re
-
-syntax_description = """
-
-A "span" is an integer (the "index") followed by an optional description of one
-or more sequence subsets.  A subset is defined by a series of subset
-descriptions, separated by a comma.  A subset description is either an integer,
-two integers separated by a hypen to indicate a range, or an integer followed
-only by a hyphen, which will include all the following elements of the span to
-the end. No spaces are allowed in a span.  All indices are zero-origin.
-
-Span examples for an index of "3":
-   3 
-   3(1)
-   3(0-4)
-   3(1-4,6-9)
-   3(5-)
-
-Note that some sequence subsets must include two numbers, for example, border
-lines in a table.
-
-""".strip()
-
-
-class Span:
-    def __init__(self, count, spec):
-        def parse_range(match):
-            start, hyphen, end = match.groups()
-            if hyphen is None and end is None:
-                end = start
-            elif end is None:
-                end = count - 1
-            return [int(start), int(end)]
-        self.all = True
-        subset_pat = "[-\\d,]+"
-        span_rgx = re.compile(f"(\d+)(\({subset_pat}\))*")
-        match = span_rgx.match(spec)
-        self.spec = spec
-        if match and match.group(0) == spec:
-            range_rgx = re.compile("(\d+)(-)?(\d+)?")
-            self.index = int(match.group(1))
-            if (match.group(2)):
-                self.subsets = match.group(2).strip("()").split(",")
-                matches = [range_rgx.match(e) for e in self.subsets]
-                self.ranges = [parse_range(e) if e else None for e in matches]
-                self.all = False
-            else:
-                self.ranges = [[0, count-1]]
-        else:
-            print(f'The span specification "{spec}" is incorrect.\n\n{syntax_description}\n')
-            sys.exit(1)
-
-    def __str__(self):
-        subsets = "all" if self.all else ",".join([f"{e[0]}-{e[1]}" for e in self.ranges])
-        return f"{self.index}[{subsets}]"
-
-    def __repr__(self):
-        return self.__str__()
-
-
-
-class Spanset:
-    def __init__(self, count, span_specs):
-        self.count = count
-        self.spans = {}
-        for specs in span_specs.split():
-            for spec in self.parse_spec(specs):
-                print("Spanset spec:", spec)
-                self.spans[spec.index] = spec
-
-
-    def parse_spec(self, spec):
-        named_spec = {"top" : ["0"],
-                      "bottom" : [str(self.count-1)],
-                      "head"   : ["1"],
-                      "outer"  : ["0", str(self.count-1)],
-                      "inner"  : [str(e) for e in range(1,self.count-1)],
-                      "all"    : [str(e) for e in range(0,self.count+1)]
-                      }.get(spec)
-        if named_spec is None:
-            return [Span(self.count, spec)]
-        else:
-            return [Span(self.count, e) for e in named_spec]
-
-
-if __name__ == "__main__":
-    import pprint
-    for s in [
-            Span(10, "0"),
-            Span(10, "1"),
-            Span(10, "2(2)"),
-            Span(10, "3(2-)"),
-            Span(10, "4(2-4)"),
-            Span(10, "5(2-4)"),
-            Span(10, "6(2-4,6)"),
-            Span(10, "7(2,6-8)"),
-            Span(10, "8(2,7-8,9-11,13-14)")]:
-        print(s.spec, "->", s)
-
-    print("Spanset")
-    S = Spanset(10, "1")
-    for name in "top bottom head outer inner all 1(2-3)".split():
-        print(name, "->", S.parse_spec(name))
-
-    print("Instantiate:")
-    s = Spanset(10, "3(1-2,4-5)")
-    print(s.tex_hline(3))
-
-
-    
--- a/sks/table/table.k
+++ b/sks/table/table.k
@@ -1,63 +1,165 @@
-#[  f: 0->1; n: 1.. (integer)
-    l, c, r
-[<numeric-size>] <width> <justification>
-width is widest line in a cell     f [default]
-width is fraction of table   <f>t
-width is specific length  <n>pt|px|in|cm   [...not portable?]
-width width is remaining (evenly divided) *
-]#
+# Table argument types and klammer declaration

-@@@argtype table_hpos |
+@@@argtype index_subsets |
+  one or more subsets in parentheses, attached to an index.  Each subset is a
+  single index <n>, a closed range <n>-<m>, or an open range <n>- (from <n> to
+  the end).  Several subsets are separated by commas, with no spaces.
+  Example: (1-4,6-9)
+  :pattern \((?^:\d+(?^:-\d*)?)(?^:,\d+(?^:-\d*)?)*\)
+@@@
+
+@@@argtype indexed_range |
+  an index with optional subsets, written with no spaces.  The index part is a
+  single index <i>, a closed index range <i>-<j>, or an open index range <i>-
+  (from <i> to the last index).  It may be followed by parenthesized subsets
+  (see the index_subsets type) restricting the extent in the other dimension.
+  All indices are zero-origin.  Examples:
+
+    3            index 3, full extent
+    2-5          indices 2 through 5, full extent
+    3(1-4,6-9)   index 3, restricted to 1 through 4 and 6 through 9
+    2-5(0-2)     indices 2 through 5, each restricted to 0 through 2
+
+  :pattern \d+(?^:-\d*)?(?^:'index_subsets')?
+@@@
+
+@@@argtype column_width |
+  width of the table columns.  Each column is one of 'fit' (widest line of the
+  cells in that column), a fraction 0.0->1.0 (that fraction of the total table
+  width), or '*' (use the remaining width of the table; there can only be one
+  column with '*'). If there are fewer positions than columns in the table, the
+  last value is repeated.  Extra positions generate a warning.
+  :pattern (fit^|f^|0?\.\d+^|\*^|\s+)+
+  :python_cast (lambda s : s.split())
+  :default fit
+@@@
+
+@@@argtype cell_hpos |
  horizontal formatting in a table cell. One of 'l', 'c' or 'r' for each
  cell in a row. If there are fewer positions than cells in a row, the
-  last value is repeated.  Extra positions generate a warning. Default is 'l'
-  #  :pattern ((f^|(0?\.'uint't^|\\*))[lcr]?^|\s)+
-#  :pattern ((f^|'float't^|\\*)[lcr]?^|\s)+
-   :pattern ([.\w]+^|\*^|\s+)+
-  #:pattern (l^|c^|r^|\s)+
+  last value is repeated.  Extra positions generate a warning.
+  :pattern (l^|c^|r^|\s+)+
  :python_cast (lambda s : s.split())
+  :default l
@@@

@@@argtype table_hline |
-   a table's horizontal line description; one or more of 'top',
-   'head', 'inner', 'bottom', or a row number for a line at the bottom
-   of that row
-   #:pattern (top^|head^|inner^|bottom^|\d+^|\d+:\(\d+\-\d+\)^|\s+)*
-   #:python_cast (lambda s : s.split())
+
+  a table's horizontal lines, as one or more whitespace-separated items.
+  With N rows there are N+1 horizontal boundaries, numbered 0 to N from the
+  top; boundary i lies above row i, and boundary N is the bottom.  An item
+  is either a boundary name or an indexed_range of boundary indices.  The
+  names are 'top' (boundary 0), 'head' (boundary 1, under a header row),
+  'bottom' (boundary N), 'inner' (all boundaries between top and bottom),
+  and 'all' (every boundary).  A name or index may be followed by
+  parenthesized subsets to draw only part of a line, given as zero-origin
+  column ranges.  Examples:
+
+    top bottom     lines above and below the table
+    head(1-)       a line under the header, from column 1 to the last
+    3(1-4,6-9)     two partial lines at boundary 3
+    all            every line
+
+  :pattern ((?^:top^|head^|inner^|bottom^|all)(?^:'index_subsets')?^|'indexed_range'^|\s+)+
+  :python_cast (lambda s : s.split())
@@@

@@@argtype table_vline |
-  a table's vertical line description; one or more of 'outer', 'inner,
-  or a column number for a line at the right of that column
-  #  :pattern (outer^|inner^|\d+^|\d+^|\d+:\(\d+\-\d+\)^|\s+)*
-  #  :python_cast (lambda s : s.split())
+
+  a table's vertical lines, as one or more whitespace-separated items.
+  With M columns there are M+1 vertical boundaries, numbered 0 to M from
+  the left; boundary i lies to the left of column i, and boundary M is the
+  right edge.  An item is either a boundary name or an indexed_range of
+  boundary indices.  The names are 'outer' (boundaries 0 and M), 'inner'
+  (all boundaries between them), and 'all' (every boundary).  A name or
+  index may be followed by parenthesized subsets to draw only part of a
+  line, given as zero-origin row ranges.  Examples:
+
+    outer          lines at the left and right edges
+    2(0-3)         a line left of column 2, spanning rows 0 through 3
+    all            every line
+
+  :pattern ((?^:outer^|inner^|all)(?^:'index_subsets')?^|'indexed_range'^|\s+)+
+  :python_cast (lambda s : s.split())
@@@

@@@argtype table_span |
-  a list of spans in a table in the form (X,Y):N (no spaces), where
-  (X,Y) is the position in the table (zero origin in the top left
-  corner) and N is the number of columns or rows in the span
-  #:pattern  (\(\d+(?:-\d+)?,\d+(?:-\d+)?\):\d+\s*)*
-  #:python_cast (lambda s : s.split())
+
+  a list of cell spans, each an indexed_range whose index selects the row
+  (for colspan) or the column (for rowspan), and whose parenthesized subset
+  gives the zero-origin range of cells to merge.  An index range repeats
+  the same span; several subsets make several spans.  Examples for colspan:
+
+    1(2-4)         in row 1, merge columns 2 through 4
+    1(0-1,3-5)     two merges in row 1
+    2-4(0-1)       the same merge in rows 2 through 4
+
+  :pattern ('indexed_range'^|\s+)+
+  :python_cast (lambda s : s.split())
+@@@
+
+@@@argtype table_calc |
+
+  calculations that fill table cells with computed values, separated by
+  semicolons.  Each calculation has the form
+
+    <target> = <operator> <operand> <operand> ...
+
+  where the target is a single cell written <row>(<column>) with zero-origin
+  indices, the operator is one of + - * /, and each operand is either a cell
+  selection or a number.  A cell selection is an indexed_range read as
+  <rows>(<columns>); a range expands to all of its cells in row order, so
+  "+ 1-2(3)" sums column 3 of rows 1 and 2.  A plain number is a constant
+  and always uses a period as its decimal mark.  Operators fold from the
+  left ("- 1(0-2)" is a minus b minus c); with a single operand, - negates
+  and / gives the reciprocal.  Calculations run in the order given, and each
+  reads the values earlier calculations have written, as displayed.
+  Example:
+
+    1(3) = * 1(1-2) ;
+    2(3) = * 2(1-2) ;
+    3(3) = + 1-2(3)
+
+  :pattern \s*(\d+\(\d+\)\s*=\s*[-+*/](\s+(\d+(?^:-\d*)?'index_subsets'^|'float'))+\s*(;\s*^|\s*$))+
+
+@@@
+
+@@@argtype decimal_mark |
+  the character used as the decimal mark in numeric cell values, either
+  'period' (1,234.56) or 'comma' (1.234,56).  Governs both the reading of
+  numbers from cells in table calculations and the formatting of
+  calculated values.
+  :pattern period^|comma
+  :default period
+@@@
+
+@@@argtype format_spec |
+  a Python format specification applied to calculated cell values, for
+  example ",.2f" for two decimal places with grouped thousands.
+  :pattern \S+
@@@

@@rowcolor.tex s : \colorrow{*s*} @@

-@@table rows.rest
+@@table rows.rest(2)
  :id
  @caption_arguments@
  :center.bool true
  :indent.length 1em
  :header.bool true
  :allow_break.bool false
+  :column_width.column_width
  :hline.table_hline
  :vline.table_vline
  :grid.bool false
-  :cell_hpos.table_hpos c
+  :cell_hpos.cell_hpos
  :header_font.font i
-  :font.font_list r
+  :font.font_list
  :colspan.table_span
  :rowspan.table_span
+  :calc.table_calc
+  :calc_format.format_spec
+  :decimal.decimal_mark
  :leading.float 1.3
  :colsep 4pt
  :
--- a/sks/table/table.py
+++ b/sks/table/table.py
@@ -10,13 +10,13 @@ import klammer_base
 import html_util
 from html_util import E
 import latex_util
-from sequences import Sequences
+from indexed_range import Indexed_ranges, hline_names, vline_names
 import table_cell
 import font

 def extend(lst, count, fill=None):
    if isinstance(lst, str):
-        lst = lst.strip().split("\\s+")
+        lst = lst.split()
    if fill is None:
        fill = lst[-1] if lst else ""
    return lst + ([fill] * (count - len(lst)))
@@ -44,34 +44,154 @@ class Table(klammer_base.Klammer_base):
    id = 0
    def __init__(self, K):
        super().__init__(K)
-        # pprint.pprint(self.__dict__)
        if self.grid:
-            self.vline = "all"
-            self.hline = "all"
-        self.number = self.number == "true"
-        self.rows = kutil.rest_args(self.rows, 2)
+            self.vline = ["all"]
+            self.hline = ["all"]
        self.row_count = len(self.rows)
        if self.header:
-            self.hline += f" 1 {self.row_count}"
+            self.hline += ["1", str(self.row_count)]
        self.row_size = max([len(e) for e in self.rows])
-        self.s_vline = Sequences(self.row_size + 1, self.row_count - 1, self.vline)
-        self.s_hline = Sequences(self.row_count + 1, self.row_size - 1, self.hline)
-        self.s_rowspan = Sequences(self.row_size, self.row_count, self.rowspan)
-        self.s_colspan = Sequences(self.row_count, self.row_size, self.colspan)
-        self.cell_hpos = extend(parse_hpos(self.K_target, self.cell_hpos.split()), self.row_size)
+        # Rows with fewer cells than the widest row are padded with empty
+        # cells (last-value duplication is for argument lists, not content).
+        self.rows = [row + [""] * (self.row_size - len(row)) for row in self.rows]
+        if self.calc:
+            self.calculate()
+        self.s_vline = Indexed_ranges(self.row_size + 1, self.row_count - 1, self.vline,
+                                      vline_names(self.row_size + 1), ":vline")
+        self.s_hline = Indexed_ranges(self.row_count + 1, self.row_size - 1, self.hline,
+                                      hline_names(self.row_count + 1), ":hline")
+        self.s_rowspan = Indexed_ranges(self.row_size, self.row_count - 1, self.rowspan,
+                                        argument=":rowspan")
+        self.s_colspan = Indexed_ranges(self.row_count, self.row_size - 1, self.colspan,
+                                        argument=":colspan")
+        self.cell_hpos = extend(parse_hpos(self.K_target, self.cell_hpos), self.row_size)
        #self.cell_hpos = self.cell_hpos.split(";")
        self.font = extend(self.font, self.row_size)
        self.make_cells(self.rows)

-    def span_count(self, span_seq, row_i, col_i):
-        result = 0
-        row_seq = span_seq[row_i]
-        if row_seq:
-            for range in row_seq.ranges:
-                if range[0] == col_i:
-                    result = range[1] - range[0] + 1
+    # Calculated cell values (:calc).  Calculations run in the order given;
+    # each reads cell values as displayed (display-precision semantics), so
+    # a printed total always equals the sum of the printed lines.  Only
+    # calculation targets are formatted (:calc_format); other cells keep
+    # their authored text.  Future operators to consider: min, max, mean,
+    # and a per-calculation format override.
+
+    calc_target_rgx = re.compile(r"(\d+)\((\d+)\)$")
+    calc_cell_rgx = re.compile(r"\d+(-\d*)?\(")
+
+    def calc_error(self, calc, message):
+        raise Exception(f'In the :calc calculation "{calc}": {message}')
+
+    def parse_number(self, text, ref, calc):
+        s = text.strip()
+        if self.decimal == "comma":
+            s = s.translate(str.maketrans(",.", ".,"))
+        s = s.replace(",", "")  # Remove thousands separators
+        try:
+            return float(s)
+        except ValueError:
+            self.calc_error(
+                calc, f'the cell {ref} contains "{text.strip()}", '
+                "which is not a number")
+
+    def format_number(self, value, calc):
+        if self.calc_format:
+            try:
+                s = format(value, self.calc_format)
+            except ValueError:
+                self.calc_error(
+                    calc, f'"{self.calc_format}" is not a valid '
+                    "format specification")
+        elif value.is_integer():
+            s = str(int(value))
+        else:
+            s = str(value)
+        if self.decimal == "comma":
+            s = s.translate(str.maketrans(",.", ".,"))
+        return s
+
+    def operand_values(self, token, calc):
+        # A token with subsets is a cell selection; a bare number is a
+        # constant (always period-decimal, independent of :decimal).
+        if not self.calc_cell_rgx.match(token):
+            return [float(token)]
+        selection = Indexed_ranges(self.row_count, self.row_size - 1,
+                                   [token], argument=":calc")
+        values = []
+        for row_i in selection.by_index:
+            for _, col_i in selection.by_index[row_i].items():
+                values.append(self.parse_number(
+                    self.rows[row_i][col_i], f"{row_i}({col_i})", calc))
+        return values
+
+    def apply_operator(self, op, values, calc):
+        if len(values) == 1:  # Lisp-style unary - and /
+            return {"+": values[0], "*": values[0],
+                    "-": -values[0], "/": 1 / values[0]}[op]
+        result = values[0]
+        for v in values[1:]:  # Fold from the left
+            if op == "+":
+                result += v
+            elif op == "-":
+                result -= v
+            elif op == "*":
+                result *= v
+            else:
+                result /= v
        return result

+    def calculate(self):
+        for calc in [c.strip() for c in self.calc.split(";") if c.strip()]:
+            target, eq, expression = calc.partition("=")
+            match = self.calc_target_rgx.match(target.strip())
+            if not eq or not match:
+                self.calc_error(calc, "the target must be a single cell "
+                                "written <row>(<column>), followed by \"=\"")
+            row_i, col_i = int(match.group(1)), int(match.group(2))
+            if row_i >= self.row_count or col_i >= self.row_size:
+                self.calc_error(
+                    calc, f"the target {target.strip()} is outside the "
+                    f"table (rows 0-{self.row_count - 1}, "
+                    f"columns 0-{self.row_size - 1})")
+            tokens = expression.split()
+            if not tokens or tokens[0] not in "+-*/" or len(tokens) < 2:
+                self.calc_error(calc, "the expression must be an operator "
+                                "(+ - * /) followed by at least one operand")
+            values = []
+            for token in tokens[1:]:
+                values += self.operand_values(token, calc)
+            try:
+                result = self.apply_operator(tokens[0], values, calc)
+            except ZeroDivisionError:
+                self.calc_error(calc, "division by zero")
+            self.rows[row_i][col_i] = self.format_number(result, calc)
+
+    def span_count(self, spans, index, cross_i):
+        # The count of cells merged by a span anchored at (index, cross_i):
+        # for colspan, index is the row and cross_i the column; for rowspan,
+        # index is the column and cross_i the row.  Non-anchor cells get 0.
+        result = 0
+        entry = spans[index]
+        if entry:
+            for start, end in entry.ranges:
+                if start == cross_i:
+                    result = end - start + 1
+        return result
+
+    def compute_coverage(self):
+        # Cells hidden by a span (every spanned cell except the anchor).
+        self.colspan_covered = set()
+        self.rowspan_covered = set()
+        for row_i in self.s_colspan.by_index:
+            for start, end in self.s_colspan.by_index[row_i].ranges:
+                for col_i in range(start + 1, end + 1):
+                    self.colspan_covered.add((row_i, col_i))
+        for col_i in self.s_rowspan.by_index:
+            for start, end in self.s_rowspan.by_index[col_i].ranges:
+                for row_i in range(start + 1, end + 1):
+                    self.rowspan_covered.add((row_i, col_i))
+        self.covered = self.colspan_covered | self.rowspan_covered
+
    def remove_redundant_borders(self):
        remove_right = []
        for row_i in range(self.row_count):
@@ -83,66 +203,76 @@ class Table(klammer_base.Klammer_base):
                    a.border.right_all = False

    def column_width_text(self):
+        # For each column, the text used to measure a 'fit' width in the
+        # tex target.  The longest cell's font is applied, so a bold or
+        # italic cell is measured in the font it will be set in.
        self.column_widths = []
-        # print("column_width_text:", len(self.cells), len(self.cells[0]))
        for col_i in range(len(self.cells[0])):
            longest = ""
+            longest_font = "r"
            for row_i in range(len(self.cells)):
                cell = self.cells[row_i][col_i]
-                if cell is not None:
-                    cell_text = cell.text
-                    #lines = [e.strip() for e in cell_text.split("\\newline")]
-                    lines = [e.strip() for e in cell_text.split("\newline")]
+                # A colspan anchor's text spans several columns and must
+                # not set the width of its own column.
+                if cell is not None and cell.colspan <= 1:
+                    lines = [e.strip() for e in cell.text.split("\\newline")]
                    lines = sorted(lines, key=len)
                    longest_in_line = lines[-1]
                    if len(longest_in_line) > len(longest):
                        longest = longest_in_line
+                        longest_font = cell.font
+            if longest_font != "r":
+                longest = font.tex_fontify(longest, longest_font, 1.0)
            self.column_widths.append(longest)
-        # kutil.msg("column_widths:")
-        # print(self.column_widths)

    def make_cells(self, rows):
+        self.compute_coverage()
        result = []
        cells = []
        for row_i, row in enumerate(rows):
            row_cells = []
            for cell_i, cell in enumerate(row):
-                rspan = self.span_count(self.s_rowspan, row_i, cell_i)
+                rspan = self.span_count(self.s_rowspan, cell_i, row_i)
                cspan = self.span_count(self.s_colspan, row_i, cell_i)
                font = self.font[cell_i]
                if row_i == 0 and self.header:
                    font = self.header_font
+                # A span anchor's right and bottom borders come from the
+                # boundary at the END of the merged region.
+                right_i = cell_i + max(cspan, 1)
+                bottom_i = row_i + max(rspan, 1)
                row_cells.append(
                    table_cell.Cell(
                        cell,
                        font, self.cell_hpos[cell_i],
                        self.s_hline.has(row_i, cell_i),
-                        self.s_vline.has(cell_i+1, row_i),
-                        self.s_hline.has(row_i+1, cell_i),
+                        self.s_vline.has(right_i, row_i),
+                        self.s_hline.has(bottom_i, cell_i),
                        self.s_vline.has(cell_i, row_i),
-                        self.s_vline.sequences.get(cell_i),
-                        self.s_vline.sequences.get(cell_i+1),
-                        rspan, cspan))
+                        self.s_vline.by_index.get(cell_i),
+                        self.s_vline.by_index.get(right_i),
+                        rspan, cspan,
+                        first_column=(cell_i == 0)))
            cells.append(row_cells)
-        widths = [len(e) for e in cells]
-        max_width = max(widths)
-        self.cells = [extend(row, max_width, None) for row in cells] \
-            if max_width != min(widths) else cells
+        self.cells = cells
        self.column_width_text()
                
    # HTML

    def html(self):
        result = ""
-        for row in self.cells:
+        for row_i, row in enumerate(self.cells):
            row_html = ""
-            for cell in row:
+            for cell_i, cell in enumerate(row):
+                if (row_i, cell_i) in self.covered:
+                    continue
                row_html += cell.html().strip() + "\n"
            result += E("tr").body(row_html).str()
        result = E("table").body(result)
        if self.number or self.caption:
            result = html_util.add_caption(
-                result, "Table", self.number, self.caption, self.caption_font)
+                result, "Table", self.number, self.caption, self.caption_font,
+                side=self.caption_side, font_size=self.caption_font_size)
        else:
            result = result.str()
        return result
@@ -150,6 +280,9 @@ class Table(klammer_base.Klammer_base):
    # LaTeX

    def tex_hpos(self):
+        # One column specification per column: the width comes from
+        # :column_width ('fit', a fraction of \tablewidth, or '*' for the
+        # remaining width), the justification from :cell_hpos.
        def par_format(s, justification):
            command = {"l" : "raggedright",
                       "c" : "centering",
@@ -157,68 +290,26 @@ class Table(klammer_base.Klammer_base):
            return f">{{\\{command}}}p{{{s}}}"

        widths = []
-        hpos_pat = re.compile("(f|(?:0?(\\.\\d+)(t))|\\*)?([lcr]?)")
-
-        def parse(s, width_text):
-            match = hpos_pat.match(s)
-            # print("MATCH:", match, match.groups())
-            width, frac, table, just = match.groups()
-            width = width or "f"
-            just = just or "l"
-            if width and width[0] == "{":
-                width = f"\\widthof{{{s}}}"
-            elif table == "t":
-                width = f"{frac}\\tablewidth"
-            elif width == "f":
-                width = f"\\widthof{{{width_text}}}"
-
-            if width != "*":
-                widths.append(width)
-
-            result = par_format(width, just) if width != "*" else s
-            # print("PARSE:", result)
-            return result
-
-        # print("self.column_widths:", len(self.column_widths), self.column_widths)
-        # return extend([parse(e) for e in self.cell_hpos], self.row_size)
-        hpos_list = []
-        for i, hpos in enumerate(extend(self.cell_hpos, self.row_size)):
-            # print(f"  Loop {i}:", hpos)
-            if i >= len(self.column_widths):
-                print(f"Warning: Ignoring table column width: {hpos}")
+        for i, w in enumerate(extend(self.column_width, self.row_size)):
+            if w in ("fit", "f"):
+                widths.append(f"\\widthof{{{self.column_widths[i]}}}")
+            elif w == "*":
+                widths.append(None)
            else:
-                hpos_list.append(parse(hpos, self.column_widths[i]))
-
-        # print("hpos_list:", hpos_list)
-        fill_count = sum([1 if "*" in e else 0 for e in hpos_list])
-        # print("fill_count:", fill_count)
-
+                widths.append(f"{w}\\tablewidth")
+        fill_count = widths.count(None)
        if fill_count > 0:
-            margins = f"(\\tabcolsep * {2 * len(hpos_list)})"
-            # print("MARGINS:", margins)
-            #expr = "\\linewidth - " + " - ".join(widths) + str("
-            if fill_count == len(hpos_list):
+            fixed = [e for e in widths if e is not None]
+            if fixed:
+                expr = f"(\\tablewidth - {' - '.join(fixed)}) / {fill_count}"
+            else:
                expr = f"{1 / fill_count}\\tablewidth"
-            else:
-                #expr = f"(\\textwidth - {margins} - {' - '.join(widths)}) / {fill_count}"                
-                expr = f"(\\tablewidth - {' - '.join(widths)}) / {fill_count}"                
-            # print(expr)
-            result = []
-            for h in hpos_list:
-                if h[0] == "*":
-                    just = h[1] if len(h) > 1 else "l"
-                    result.append(par_format(expr, just))
-                else:
-                    result.append(h)
-        else:
-            result = hpos_list
-        # print("tex_hpos:", result)
-
-        return result
+            widths = [e if e is not None else expr for e in widths]
+        return [par_format(w, j) for w, j in zip(widths, self.cell_hpos)]

    def tex_column_spec(self):
        parts = [""] * (self.row_size * 2 + 1)
-        for i in self.s_vline.sequences:
+        for i in self.s_vline.by_index:
            parts[i * 2] = "|"
        for i, hpos in enumerate(self.tex_hpos()):
            parts[i * 2 + 1] = hpos
@@ -226,30 +317,42 @@ class Table(klammer_base.Klammer_base):
        return "".join(parts)

    def tex_hline(self, index):
-        hline = ""
+        # Contiguous cell borders coalesce into single \cline runs; a
+        # full-width line becomes \hline.
        bottom = index == self.row_count
        if bottom:
            index -= 1
-        count = 0
-        for i, cell in enumerate(self.cells[index]):
-            has_border = cell.border.bottom if bottom else cell.border.top
-            if has_border:
-                hline += f"\\cline{{{i+1}-{i+1}}} "
-                count += 1
-        #if count == self.row_size:
-        #    hline = "\\hline"
+        flags = [(cell.border.bottom if bottom else cell.border.top)
+                 for cell in self.cells[index]]
+        if not bottom:
+            # No line through the interior of a merged (rowspan) cell.
+            flags = [flag and (index, col_i) not in self.rowspan_covered
+                     for col_i, flag in enumerate(flags)]
+        if flags and all(flags):
+            return "\\hline\n"
+        hline = ""
+        start = None
+        for i, flag in enumerate(flags + [False]):
+            if flag and start is None:
+                start = i
+            elif not flag and start is not None:
+                hline += f"\\cline{{{start + 1}-{i}}} "
+                start = None
        return hline.strip() + "\n"

    def tex_rows(self):
        result = ""
        for row_i, row in enumerate(self.cells):
            result += self.tex_hline(row_i)
-            tab = ""
+            parts = []
            for cell_i, cell in enumerate(row):
-                result += tab + cell.tex()
-                tab = " & "
-            #result += " \\\\\n"
-            result += " \\tabularnewline\n"
+                if (row_i, cell_i) in self.colspan_covered:
+                    continue  # Absorbed by the \multicolumn anchor
+                if (row_i, cell_i) in self.rowspan_covered:
+                    parts.append("")  # Occupied by the \multirow anchor
+                else:
+                    parts.append(cell.tex())
+            result += " & ".join(parts) + " \\tabularnewline\n"
        result += self.tex_hline(self.row_count)
        return result

@@ -277,9 +380,7 @@ class Table(klammer_base.Klammer_base):

    def tex(self):
        result = self.get_width()
-        result += "\\vspace*{-.75\\baselineskip}"
-        # result = ""
-        result += "\\renewcommand*{\\arraystretch}{1.3}\n"
+        result += f"\\renewcommand*{{\\arraystretch}}{{{self.leading}}}\n"
        if self.allow_break:
            result += "\\vspace*{12pt}\n"
        result += "\\begin{longtable}{"
@@ -292,17 +393,26 @@ class Table(klammer_base.Klammer_base):

        if not self.allow_break:
            if self.number or self.caption:
-                result = latex_util.add_caption(result, "Table", self.number, self.caption, "\\tablewidth")
+                result = latex_util.add_caption(
+                    result, "Table", self.number, self.caption, "\\tablewidth",
+                    side=self.caption_side, font_symbol=self.caption_font,
+                    font_size=self.caption_font_size)
            else:
                result = latex_util.caption_wrapper(result, "center")

        name = f"Reference-Table-{Table.id}"
+        Table.id += 1
        result = f"\\hypertarget{{{name}}}{{}}\\label{{Label-{name}}}\n{result}"
-        result = f"\\setlength{{\\tablewidth}}{{\\textwidth - {2 * self.row_count}\\tabcolsep}}\n" + result
-        # result += "\\vspace*{-8pt}"
+        # The wrapper (add_caption/caption_wrapper) owns all vertical space
+        # around the table; longtable's own glue is zeroed.
+        result = (f"\\setlength{{\\tabcolsep}}{{{self.colsep}}}\n"
+                  "\\setlength{\\LTpre}{0pt}\n"
+                  "\\setlength{\\LTpost}{0pt}\n"
+                  f"\\setlength{{\\tablewidth}}{{\\textwidth - {2 * self.row_size}\\tabcolsep}}\n"
+                  + result)
        result = re.sub(r"\newline", r"\\\\", result)
        return result
    
    def txt(self):
-        return "TXT"
+        return "Table in .txt format not implemented"

--- a/sks/table/table_cell.py
+++ b/sks/table/table_cell.py
@@ -1,19 +1,25 @@
+import re
+
 import border
 import font
 import html_util
 from html_util import E

+# A purely numeric cell value (either decimal-mark style, optional sign).
+number_rgx = re.compile(r"[-+]?[\d.,]+$")
+
 class Cell:
    def __init__(self, text, font, hpos,
                 top, right, bottom, left,
                 left_all, right_all,
-                 rowspan, colspan):
+                 rowspan, colspan, first_column=False):
        self.text = text
        self.font = font
        self.hpos = hpos
        self.border = border.Border(top, right, bottom, left, left_all, right_all)
        self.rowspan = rowspan
        self.colspan = colspan
+        self.first_column = first_column
        #print("Cell:", text, hpos)

    def __str__(self):
@@ -30,6 +36,10 @@ class Cell:
    def html(self):
        result = self.text
        result = E("td").body(font.html_fontify(result, self.font, 1.0))
+        if self.rowspan > 1:
+            result.attr("rowspan", self.rowspan)
+        if self.colspan > 1:
+            result.attr("colspan", self.colspan)
        for pred, cls_name in zip(self.border.has(), "Bt Br Bb Bl".split()):
            if pred:
                result.cls(cls_name)
@@ -38,8 +48,26 @@ class Cell:

    def tex(self, debug=False): # , left_line, right_line):
        result = self.text
+        # A number must not line-break (LaTeX breaks after a minus sign
+        # read as a hyphen in narrow fit-width columns).
+        if number_rgx.match(result.strip()):
+            result = f"\\mbox{{{result.strip()}}}"
        if self.font != "r":
            result = font.tex_fontify(result, self.font, 1.0)
+        if self.rowspan > 1:
+            result = f"\\multirow{{{self.rowspan}}}{{*}}{{{result}}}"
+        if self.colspan > 1:
+            # \multicolumn carries the merged cell's own column spec.  A
+            # left bar may only be given when the span starts at the
+            # table's first column: elsewhere the bar to the left belongs
+            # to the preceding column's preamble entry, and adding one
+            # here draws a doubled line.
+            pos = self.hpos
+            if self.border.left and self.first_column:
+                pos = "|" + pos
+            if self.border.right:
+                pos = pos + "|"
+            return f"\\multicolumn{{{self.colspan}}}{{{pos}}}{{{result}}}"
        remove_left = self.border.left_all and not self.border.left
        remove_right = self.border.right_all and not self.border.right
        if debug:
--- a/sks/target/Makefile
+++ b/sks/target/Makefile
@@ -5,12 +5,12 @@ K := $(KLAMMERTEXT_HOME)
 KS := $(K)/sks
 KM := $(K)/mac

-include $(KM)/env/makefile.env
+include $(K)/env/makefile.env

 # Source files
-SOURCES := html_util.cpp latex_util.cpp font_resolve.cpp
-OBJECTS := html_util.o latex_util.o font_resolve.o
-DEPFILES := html_util.d latex_util.d font_resolve.d
+SOURCES := html_util.cpp latex_util.cpp
+OBJECTS := html_util.o latex_util.o
+DEPFILES := html_util.d latex_util.d

 # Additional include paths
 LOCAL_CPPFLAGS := -I$(KM) -I$(KS)/kutil
--- a/sks/target/font_resolve.cpp
+++ b/sks/target/font_resolve.cpp
@@ -1,329 +0,0 @@
-#include "font_resolve.h"
-#include "file.h"
-#include "util.h"
-#include "error.h"
-#include "log.h"
-#include "show.h"
-#include "kutil.h"
-
-#include <algorithm>
-#include <regex>
-#include <sstream>
-#include <filesystem>
-
-namespace fs = std::filesystem;
-
-
-std::string name_to_dirname(std::string name)
-{
-    std::string result {};
-    for (char c : name) {
-        if (c == ' ')
-            result += '-';
-        else
-            result += std::tolower(c);
-    }
-    return result;
-}
-
-
-std::string name_to_google_query(std::string name)
-{
-    std::string result {};
-    for (char c : name) {
-        if (c == ' ')
-            result += '+';
-        else
-            result += c;
-    }
-    return result;
-}
-
-
-static void classify_from_css(Resolved_font& font, std::string css_path)
-{
-    // Parse the @font-face blocks in the CSS to determine variant → filename mapping
-    std::string css = string_from_file(css_path);
-    std::regex face_rgx(
-        R"(@font-face\s*\{[^}]*font-style:\s*(\w+);[^}]*font-weight:\s*(\w+);[^}]*url\('([^']+\.ttf)'\)[^}]*\})",
-        std::regex::multiline);
-    auto begin = std::sregex_iterator(css.begin(), css.end(), face_rgx);
-    auto end = std::sregex_iterator();
-    for (auto it = begin; it != end; ++it) {
-        std::string style = (*it)[1];
-        std::string weight = (*it)[2];
-        std::string url_path = (*it)[3];
-        // URL is like 'dir-name/Filename.ttf' — extract just the filename
-        std::string filename = url_path.substr(url_path.rfind('/') + 1);
-        bool is_bold = (weight == "700" || weight == "bold");
-        bool is_italic = (style == "italic" || style == "oblique");
-        if (is_bold && is_italic)
-            font.bold_italic = filename;
-        else if (is_bold)
-            font.bold = filename;
-        else if (is_italic)
-            font.italic = filename;
-        else
-            font.regular = filename;
-    }
-}
-
-static Resolved_font resolve_bundled(std::string family_name, std::string dir_name)
-{
-    std::string bundled_dir = klammertext_dir() + "/sks/font/fonts/" + dir_name;
-    std::string bundled_css = bundled_dir + ".css";
-    if (fs::exists(bundled_dir) && fs::exists(bundled_css)) {
-        Resolved_font font {};
-        font.family_name = family_name;
-        font.dir_name = dir_name;
-        font.font_dir = bundled_dir;
-        font.css_file = bundled_css;
-        font.from_cache = false;
-        classify_from_css(font, bundled_css);
-        return font;
-    }
-    return {};
-}
-
-
-static Resolved_font resolve_cached(std::string family_name, std::string dir_name)
-{
-    std::string cache_base = cache_directory("_fonts");
-    std::string cache_dir = cache_base + "/" + dir_name;
-    std::string cache_css = cache_base + "/" + dir_name + ".css";
-    if (fs::exists(cache_dir) && fs::exists(cache_css)) {
-        Resolved_font font {};
-        font.family_name = family_name;
-        font.dir_name = dir_name;
-        font.font_dir = cache_dir;
-        font.css_file = cache_css;
-        font.from_cache = true;
-        classify_from_css(font, cache_css);
-        return font;
-    }
-    return {};
-}
-
-
-static Resolved_font fetch_google_font(std::string family_name, std::string dir_name)
-{
-    (void)K::log(1, "Fetching font \"" + family_name + "\" from Google Fonts");
-
-    std::string query = name_to_google_query(family_name);
-    std::string url =
-        "https://fonts.googleapis.com/css2?family=" + query +
-        ":ital,wght@0,400;0,700;1,400;1,700&display=swap";
-
-    std::string cmd = "curl -s -H 'User-Agent: Mozilla/4.0' '" + url + "'";
-    std::string css_response = exec(cmd.c_str());
-
-    if (css_response.empty() || css_response.find("@font-face") == std::string::npos) {
-        return {};
-    }
-
-    // Parse @font-face blocks to extract style, weight, and .ttf URL
-    struct Font_variant {
-        std::string style;   // "normal" or "italic"
-        std::string weight;  // "400" or "700"
-        std::string url;
-    };
-    std::vector<Font_variant> variants {};
-
-    std::regex face_rgx(
-        R"(@font-face\s*\{[^}]*font-style:\s*(\w+);[^}]*font-weight:\s*(\d+);[^}]*src:\s*url\((https?://[^)]+\.ttf)\)[^}]*\})",
-        std::regex::multiline);
-
-    auto begin = std::sregex_iterator(css_response.begin(), css_response.end(), face_rgx);
-    auto end = std::sregex_iterator();
-
-    for (auto it = begin; it != end; ++it) {
-        Font_variant v {};
-        v.style = (*it)[1];
-        v.weight = (*it)[2];
-        v.url = (*it)[3];
-        variants.push_back(v);
-    }
-
-    if (variants.empty()) {
-        return {};
-    }
-
-    // Create cache directory
-    std::string cache_base = cache_directory("_fonts");
-    if (!fs::exists(cache_base))
-        fs::create_directories(cache_base);
-
-    std::string cache_dir = cache_base + "/" + dir_name;
-    if (!fs::exists(cache_dir))
-        fs::create_directory(cache_dir);
-
-    Resolved_font font {};
-    font.family_name = family_name;
-    font.dir_name = dir_name;
-    font.font_dir = cache_dir;
-    font.from_cache = true;
-
-    // Download each .ttf file with descriptive names
-    for (auto& v : variants) {
-        std::string local_name;
-        if (v.style == "normal" && v.weight == "400")
-            local_name = "Regular.ttf";
-        else if (v.style == "normal" && v.weight == "700")
-            local_name = "Bold.ttf";
-        else if (v.style == "italic" && v.weight == "400")
-            local_name = "Italic.ttf";
-        else if (v.style == "italic" && v.weight == "700")
-            local_name = "BoldItalic.ttf";
-        else
-            continue;
-
-        std::string ttf_path = cache_dir + "/" + local_name;
-
-        if (!fs::exists(ttf_path)) {
-            std::string dl_cmd = "curl -s -o '" + ttf_path + "' '" + v.url + "'";
-            (void)exec(dl_cmd.c_str());
-            if (!fs::exists(ttf_path)) {
-                (void)K::log(1, "Failed to download font file: " + v.url);
-                continue;
-            }
-        }
-
-        if (local_name == "Regular.ttf")
-            font.regular = local_name;
-        else if (local_name == "Bold.ttf")
-            font.bold = local_name;
-        else if (local_name == "Italic.ttf")
-            font.italic = local_name;
-        else if (local_name == "BoldItalic.ttf")
-            font.bold_italic = local_name;
-    }
-
-    // Generate @font-face CSS file
-    std::string css_file = cache_base + "/" + dir_name + ".css";
-    std::stringstream css {};
-    auto emit_face = [&](std::string style, std::string weight, std::string filename) {
-        if (filename.empty())
-            return;
-        css << "\n@font-face {\n"
-            << "  font-family: '" << family_name << "';\n"
-            << "  font-style: " << style << ";\n"
-            << "  font-weight: " << weight << ";\n"
-            << "  src: url('" << dir_name << "/" << filename << "') format('truetype');\n"
-            << "}\n";
-    };
-    emit_face("normal", "400", font.regular);
-    emit_face("normal", "700", font.bold);
-    emit_face("italic", "400", font.italic);
-    emit_face("italic", "700", font.bold_italic);
-
-    string_to_file(css_file, css.str());
-    font.css_file = css_file;
-
-    return font;
-}
-
-
-static void extract_font_metrics(Resolved_font& font)
-{
-    if (font.regular.empty() || font.font_dir.empty())
-        return;
-    std::string ttf_path = font.font_dir + "/" + font.regular;
-    if (!fs::exists(ttf_path))
-        return;
-    // Extract both x-height and cap-height ratios from OS/2 table
-    std::string script =
-        "python3 -c \""
-        "import struct; "
-        "f = open('" + ttf_path + "', 'rb'); "
-        "_, n = struct.unpack('>IH', f.read(6)); "
-        "f.read(6); "
-        "t = {};\n"
-        "for _ in range(n):\n"
-        "    tag = f.read(4).decode('latin-1').strip('\\\\x00'); "
-        "    _, o, l = struct.unpack('>III', f.read(12)); "
-        "    t[tag] = o\n"
-        "f.seek(t['head'] + 18); "
-        "upm = struct.unpack('>H', f.read(2))[0]; "
-        "f.seek(t['OS/2']); "
-        "ver = struct.unpack('>H', f.read(2))[0]; "
-        "f.seek(t['OS/2'] + 86); "
-        "xh, ch = struct.unpack('>hh', f.read(4)); "
-        "print(f'{xh/upm:.4f} {ch/upm:.4f}') if ver >= 2 else None; "
-        "f.close()\"";
-    std::string result = trim(exec(script.c_str()));
-    if (!result.empty()) {
-        try {
-            auto pos = result.find(' ');
-            if (pos != std::string::npos) {
-                font.xheight_ratio = std::stof(result.substr(0, pos));
-                font.capheight_ratio = std::stof(result.substr(pos + 1));
-            }
-        } catch (...) {}
-    }
-}
-
-Resolved_font resolve_font(std::string family_name)
-{
-    if (family_name.empty())
-        return {};
-
-    std::string dir_name = name_to_dirname(family_name);
-
-    // 1. Check bundled fonts
-    Resolved_font font = resolve_bundled(family_name, dir_name);
-    if (!font.family_name.empty()) {
-        extract_font_metrics(font);
-        return font;
-    }
-
-    // 2. Check font cache
-    font = resolve_cached(family_name, dir_name);
-    if (!font.family_name.empty()) {
-        extract_font_metrics(font);
-        return font;
-    }
-
-    // 3. Fetch from Google Fonts
-    font = fetch_google_font(family_name, dir_name);
-    if (!font.family_name.empty()) {
-        extract_font_metrics(font);
-        return font;
-    }
-
-    // 4. Error
-    throw Argument_error(
-        "Font \"" + family_name + "\" not found.\n"
-        "  Not bundled in sks/font/fonts/" + dir_name + "/,\n"
-        "  not cached, and not available from Google Fonts.\n"
-        "  Check the font name or install it locally.");
-}
-
-
-// Font assets are copied with copy_file_stream() (mac/file.h) rather than
-// std::filesystem::copy_file, which fails on Apple `container` virtiofs mounts
-// — see the note on copy_file_stream() in file.cpp for the full rationale.
-
-
-void install_resolved_font(const Resolved_font& font, std::string output_dir)
-{
-    if (font.family_name.empty())
-        return;
-
-    std::string output_font_dir = output_dir + "/fonts";
-    if (!fs::exists(output_font_dir))
-        fs::create_directory(output_font_dir);
-
-    // Copy .css file and font directory to output
-    std::string dest_css = output_font_dir + "/" + font.dir_name + ".css";
-    std::string dest_dir = output_font_dir + "/" + font.dir_name;
-
-    copy_file_stream(font.css_file, dest_css);
-
-    if (!fs::exists(dest_dir)) {
-        fs::create_directory(dest_dir);
-        for (auto& entry : fs::directory_iterator(font.font_dir)) {
-            copy_file_stream(entry.path(),
-                             dest_dir + "/" + entry.path().filename().string());
-        }
-    }
-}
--- a/sks/target/font_resolve.h
+++ b/sks/target/font_resolve.h
@@ -1,24 +0,0 @@
-#pragma once
-
-#include <string>
-#include <vector>
-
-struct Resolved_font {
-    std::string family_name {};   // "Crimson Pro"
-    std::string dir_name {};      // "crimson-pro"
-    std::string font_dir {};      // Full path to font directory
-    std::string css_file {};      // Full path to .css file
-    bool from_cache = false;
-    // .ttf filenames for each variant (empty if variant not available):
-    std::string regular {};
-    std::string bold {};
-    std::string italic {};
-    std::string bold_italic {};
-    float xheight_ratio = 0.0f;   // x-height / unitsPerEm from OS/2 table
-    float capheight_ratio = 0.0f;  // cap-height / unitsPerEm from OS/2 table
-};
-
-std::string name_to_dirname(std::string name);
-std::string name_to_google_query(std::string name);
-Resolved_font resolve_font(std::string family_name);
-void install_resolved_font(const Resolved_font& font, std::string output_dir);
--- a/sks/target/html_util.cpp
+++ b/sks/target/html_util.cpp
@@ -254,25 +254,6 @@ namespace html {
        return result;
    }

-    elements_t google_font_elements(strings_t fontnames)
-    {
-        elements_t result {};
-        if (fontnames.size() > 0) {
-            result.push_back(elt("link")
-                             .attr("rel", "preconnect")
-                             .attr("href", "https://fonts.googleapis.com"));
-            result.push_back(elt("link")
-                             .attr("rel", "preconnect")
-                             .attr("href", "https://fonts.gstatic.com"));
-        }
-        for (auto name : fontnames)
-            result.push_back(
-                elt("link")
-                .attr("href", "https://fonts.googleapis.com/css2?family=" + name + "&display=swap")
-                .attr("rel", "stylesheet"));
-        return result;
-    }
-
    elements_t javascript(std::string output_dir, strings_t js_filenames)
    {
        //elements_t result { jquery_elements() };
@@ -298,15 +279,12 @@ namespace html {
    HTML head(std::string title,
              std::string css,
              strings_t css_filenames,
-              strings_t local_fonts, strings_t google_fonts)
+              strings_t local_fonts)
    {
        elements_t elts = meta_elements();
        // msg() << "ELTS sks: " << elts << "\n";
        for (auto e : local_font_elements(local_fonts))
            elts.push_back(e);
-        for (auto e : google_font_elements(google_fonts))
-            elts.push_back(e);
-        //elts += google_font_prolog();

        //std::string css_dir = output_dir + "/css/";
        // No; a single file at the top level...?
@@ -471,55 +449,6 @@ namespace html {
        return result; 
    }

-    void install_local_fonts(strings_t font_dirs, strings_t names, std::string output_dir)
-    {
-        std::string output_font_dir = output_dir + "/fonts";
-        //std::cout << "Font directory for website: " << output_font_dir << "\n";
-        if (!file_exists(output_font_dir)) {
-            fs::create_directory(output_font_dir);
-            //std::cout << "  Font directory created: " << output_font_dir << "\n";
-        }
-
-        for (auto name : names) {
-            //std::cout << "Font search for " << name << ": " << klammertext_dir() << "/sks/font/fonts/\n";
-            std::string src_font_dir = klammertext_dir() + "/sks/font/fonts/" + name;
-            if (!file_exists(src_font_dir)) {
-                    bool found = false;
-                    for (std::string font_dir : font_dirs) {
-                        src_font_dir = font_dir + "/" + name;
-                        //std::cout << "Font search for " << name << ": " << font_dir << "/\n";
-                        if (file_exists(src_font_dir)) {
-                            found = true;
-                            break;
-                        }
-                    }
-                    if (!found) {
-                        throw Argument_error(
-                            "Local font directory \"" + src_font_dir + "\" does not exist");
-                    }
-            }
-            //std::cout << "Font " << name << ": " << src_font_dir << "\n";
-
-            std::string src_font_css = src_font_dir + ".css";
-            if (!fs::exists(src_font_css)) {
-                throw Argument_error(
-                    "Local font CSS file \"" + src_font_css + "\" does not exist");
-            }
-            std::string font_copy =
-                "cp -r " + src_font_css + " " + src_font_dir + " " + output_font_dir;
-
-            //std::string files_copy = "cp -r " + basename + " " + font_dir;
-            //cout << css_copy << "\n" << files_copy << "\n";
-            //std::cout << system(css_copy.c_str()) << "\n";
-            //std::cout << system(files_copy.c_str()) << "\n";
-
-            if (system(font_copy.c_str()) != 0) {
-                std::cout << "Font copy command: " << font_copy << "\n";
-                throw Argument_error("Local font \"" + name + "\" not found");
-            }
-        }
-    }
-
    elements_t status(std::string date, std::string version, std::string copyright)
    {
        elements_t result {};
@@ -550,7 +479,6 @@ namespace html {
        strings_t css_filenames,
        strings_t js_filenames,
        strings_t local_fonts,
-        strings_t google_fonts,
        std::string logo)
    {
        if (page_title.empty())
@@ -601,7 +529,7 @@ namespace html {
            page_title = title;
        result.push_back(
            elt("html",
-                { head(page_title, css, css_filenames, local_fonts, google_fonts),
+                { head(page_title, css, css_filenames, local_fonts),
                  elt("body", body)
                }).attr("lang", "en"));
        return result;
@@ -666,12 +594,12 @@ namespace html {
    elements_t make_page(
        elements_t body,
        std::string page_title, std::string css,
-        strings_t css_filenames, strings_t local_fonts, strings_t google_fonts)
+        strings_t css_filenames, strings_t local_fonts)
    {
        elements_t page { preamble() };
        page.push_back(
            elt("html",
-                { head(page_title, css, css_filenames, local_fonts, google_fonts),
+                { head(page_title, css, css_filenames, local_fonts),
                  elt("body", body)
                }).attr("lang", "en"));
        return page;
--- a/sks/target/html_util.h
+++ b/sks/target/html_util.h
@@ -76,8 +76,6 @@ namespace html {
    //HTML preamble();
    //HTML head(strings_t css_filenames, strings_t js_filenames);

-    void install_local_fonts(strings_t font_dirs, strings_t names, std::string output_dir);
-
    elements_t page(
        std::string title,
        std::string page_title,
@@ -93,7 +91,6 @@ namespace html {
        strings_t css_filenames = {},
        strings_t js_filenames = {},
        strings_t local_fonts = {},
-        strings_t google_fonts = {},
        std::string logo = {});

    void add_title(elements_t& body, std::string title, std::string logo="");
@@ -108,8 +105,7 @@ namespace html {
        elements_t body,
        std::string page_title, std::string css,
        std::vector<std::string> css_filenames,
-        std::vector<std::string> local_fonts,
-        std::vector<std::string> google_fonts);
+        std::vector<std::string> local_fonts);

    bool tag_is_block_element(std::string tag);
    std::string make_paragraphs(std::string html_text);
--- a/sks/target/html_util.py
+++ b/sks/target/html_util.py
@@ -198,7 +198,7 @@ def add_caption(element, caption_label, number, caption_text,
    tag = element_tag(element)
    # Caption
    caption = ""
-    if number == "true":
+    if number:
        caption = kutil.caption_marker(caption_label, caption_text)
    elif caption_text:
        caption = caption_text
--- a/sks/target/latex_util.cpp
+++ b/sks/target/latex_util.cpp
@@ -3,7 +3,7 @@
 #include "util.h"
 #include "log.h"
 #include "show.h"
-#include "font_resolve.h"
+#include "font_store.h"

 namespace latex {

--- a/sks/target/latex_util.h
+++ b/sks/target/latex_util.h
@@ -2,7 +2,7 @@

 #include <string>
 #include <vector>
-#include "font_resolve.h"
+#include "font_store.h"

 namespace latex {

--- a/sks/target/latex_util.py
+++ b/sks/target/latex_util.py
@@ -73,9 +73,8 @@ def make_caption_text(number, label, text, font_symbol, font_size):
        # caption = text   # f"{{\\small \\it \\par {caption_text}}}"
        caption = text

-    font_symbol = "r"
-    font_size = 1.2
-
+    if caption is None:
+        return ""
    caption = font.tex_fontify(caption, font_symbol, font_size)
    return caption

@@ -108,9 +107,9 @@ def add_caption(element, caption_label, number, caption_text, latex_width,
                               # minipage(caption),
                               latex_width, vertical="t")
        elif side == "top":
-            element = minipage(caption + "\n" + element,
-                               # minipage(caption, vertical="t") +
-                               # caption_margin + "\n" +
-                               # minipage(element),
+            # A depth strut: the bottom-caption case uses \vstrut (height)
+            # above the caption; a top caption needs the mirror image,
+            # space below its line.
+            element = minipage(caption + "\\rule[-0.75\\baselineskip]{0pt}{0pt}\n" + element,
                               latex_width, vertical="t")
    return caption_wrapper(element, hpos)
--- a/tst/cond_test.sh
+++ b/tst/cond_test.sh
@@ -17,7 +17,7 @@
 # theoretical basis (operadic arity, the precedence-order proposition, and
 # @cond as a non-strict special form).
 #
-# Usage: ./cond_test.sh   (LSan suppressions come from mac/env/runtime.env.*)
+# Usage: ./cond_test.sh   (LSan suppressions come from env/runtime.env.*)
 # Exit code: 0 if all tests pass, 1 otherwise.

 PASS=0