/* AxeGraft Editor.

   Two themes, chosen from the View menu:
   - dark (the default): near-black and bluish, with glow and monospaced data.
   - classic: Windows 9x-like, with grey bevelled panels, fieldset groups,
     black lists and fields, and system fonts.

   The editor sets data-theme on its root element, and on <html> on the
   editor page. Every colour, border and bevel is a token, so the rules
   below are shared, and the theme blocks only set tokens, plus a few
   touches of the dark theme at the end. Without data-theme, as on the
   test page, the classic tokens apply. */

:root,
[data-theme="classic"] {
  color-scheme: light;
  --bg: #c0c0c0;
  --panel: #c0c0c0;
  --panel-2: #dfdfdf;
  --line: #808080;
  --edge-light: #ffffff;
  --edge-dark: #404040;
  --text: #000000;
  --text-muted: #333333;
  --text-disabled: #808080;
  --bw: 2px;
  --radius: 0;
  --bevel-out: var(--edge-light) var(--edge-dark) var(--edge-dark) var(--edge-light);
  --bevel-in: var(--line) var(--edge-light) var(--edge-light) var(--line);
  --bevel-pressed: var(--edge-dark) var(--edge-light) var(--edge-light) var(--edge-dark);
  --fieldset-border: 2px groove var(--panel-2);
  --button-bg: var(--panel);
  --field-bg: #000000;
  --field-text: #e8e8e8;
  --field-muted: #9a9a9a;
  --select-bg: #2050c0;
  --select-text: #ffffff;
  --hover-bg: #1c2a4a;
  --menu-hover-bg: var(--select-bg);
  --menu-hover-text: var(--select-text);
  --focus: 1px dotted #000000;
  --field-focus: 1px solid var(--select-bg);
  --link: #00008b;
  --changed: #ffd23c;
  --changed-text: #5a4300;
  --error: #ff4a4a;
  --error-strong: #b00000;
  --warning: #ff9b20;
  --problem-error-bg: #b00000;
  --problem-error-text: #ffffff;
  --problem-warning-bg: #ffd29a;
  --problem-warning-text: #000000;
  --problem-unused-bg: #dfdfdf;
  --problem-unused-text: #222222;
  --notice-bg: #fff3b0;
  --notice-text: #3a3000;
  --notice-line: #b8a800;
  --notice-error-bg: #ffe0e0;
  --notice-error-text: #5a0000;
  --tip-bg: #ffffe1;
  --tip-text: #000000;
  --tip-line: #000000;
  --shadow: 2px 2px 0 rgba(0, 0, 0, 0.25);
  --dialog-title-bg: linear-gradient(90deg, #000080, #1084d0);
  --dialog-title-text: #ffffff;
  --backdrop: rgba(0, 0, 0, 0.35);
  --preview-bg: #101010;
  --slot-bg: #1d1d1d;
  --slot-line: #3a3a3a;
  --slot-filled-bg: #2a2a2a;
  --slot-filled-line: #6d6d6d;
  --slot-selected: #3ac8ff;
  --slot-pos: #777777;
  --row-bg: #dfdfdf;
  --row-or-bg: #e8d9ff;
  --row-level-bg: #c9dcff;
  --row-level-line: #6c8fd8;
  --row-alt-line: #9a6ad8;
  --row-error-bg: #ffdcdc;
  --row-original-bg: #d0d0d0;
  --diff-added-bg: #c6efc0;
  --diff-added-text: #0a3a00;
  --diff-missing-bg: #ffc6c6;
  --diff-missing-text: #5a0000;
  --diff-changed-bg: #fff0a0;
  --diff-changed-text: #4a3800;
  --row-idx: #555555;
  --avail-unknown-bg: #ffe9c4;
  --avail-na-bg: #dedede;
  --avail-na-text: #444444;
  --ok-text: #0a5a00;
  --skip-text: #6a5000;
  --string-bg: #000000;
  --string-text: #e8e8e8;
  --string-ctrl: #ffcf5a;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
  --data-font: var(--font);
  --gap-x: 6px;
  --gap-y: 5px;
  --field-margin: 6px;
  --min-width: 900px;
  --max-width: 1200px;
  --main-gap: 12px;
  --panel-pad: 12px 12px;
  --field-width: 520px;
  --min-height: 560px;
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg: #060a12;
  --panel: #0b1220;
  --panel-2: #101a2d;
  --line: #1c2a45;
  --line-strong: #2b4370;
  --edge-light: var(--line);
  --edge-dark: var(--line);
  --text: #c6d8f2;
  --text-muted: #7088ad;
  --text-disabled: #3d4f6e;
  --accent: #3ea6ff;
  --accent-2: #22d3ee;
  --glow: 0 0 0 1px rgba(62, 166, 255, 0.75), 0 0 14px rgba(62, 166, 255, 0.5), 0 0 30px rgba(62, 166, 255, 0.2);
  --glow-soft: 0 0 24px rgba(62, 166, 255, 0.1);
  --glow-text: 0 0 10px rgba(62, 166, 255, 0.65);
  --bw: 1px;
  --radius: 4px;
  --bevel-out: var(--line-strong);
  --bevel-in: var(--line);
  --bevel-pressed: var(--accent);
  --fieldset-border: 1px solid var(--line);
  --button-bg: #0f1c33;
  --field-bg: #050911;
  --field-text: #bfe3ff;
  --field-muted: #56709a;
  --select-bg: #0f3a66;
  --select-text: #eaf6ff;
  --hover-bg: #0e1b30;
  --menu-hover-bg: #12355c;
  --menu-hover-text: #eaf6ff;
  --focus: 1px solid var(--accent);
  --field-focus: 1px solid var(--accent);
  --link: #5cc8ff;
  --changed: #f5c542;
  --changed-text: #f5c542;
  --error: #ff4d6d;
  --error-strong: #ff6b85;
  --warning: #ffa53d;
  --problem-error-bg: rgba(255, 77, 109, 0.14);
  --problem-error-text: #ff9fb0;
  --problem-warning-bg: rgba(255, 165, 61, 0.13);
  --problem-warning-text: #ffc98a;
  --problem-unused-bg: #101a2d;
  --problem-unused-text: #7088ad;
  --notice-bg: rgba(245, 197, 66, 0.08);
  --notice-text: #f0d98a;
  --notice-line: rgba(245, 197, 66, 0.35);
  --notice-error-bg: rgba(255, 77, 109, 0.1);
  --notice-error-text: #ffb3c0;
  --tip-bg: #0a1426;
  --tip-text: #d6eaff;
  --tip-line: var(--accent);
  --shadow: 0 6px 24px rgba(0, 0, 0, 0.6);
  --dialog-title-bg: linear-gradient(90deg, #0a2341, #0d3f6e);
  --dialog-title-text: #eaf6ff;
  --backdrop: rgba(2, 5, 12, 0.7);
  --preview-bg: #03060c;
  --slot-bg: #0a111e;
  --slot-line: #182540;
  --slot-filled-bg: #0f1c33;
  --slot-filled-line: #2f5590;
  --slot-selected: var(--accent-2);
  --slot-pos: #4b6185;
  --row-bg: #0e182b;
  --row-or-bg: #171433;
  --row-level-bg: #0e2445;
  --row-level-line: #3e7bd6;
  --row-alt-line: #9a6ad8;
  --row-error-bg: #26101a;
  --row-original-bg: #0a1220;
  --diff-added-bg: #143d1c;
  --diff-added-text: #c4f5c4;
  --diff-missing-bg: #4d161b;
  --diff-missing-text: #ffcfcf;
  --diff-changed-bg: #4a3d0c;
  --diff-changed-text: #ffeaa6;
  --row-idx: #56709a;
  --avail-unknown-bg: rgba(245, 197, 66, 0.1);
  --avail-na-bg: #0a1220;
  --avail-na-text: #56709a;
  --ok-text: #4ade80;
  --skip-text: #fbbf24;
  --string-bg: #03060c;
  --string-text: #bfe3ff;
  --string-ctrl: #ffcf5a;
  --font: "Inter", "Segoe UI Variable", "Segoe UI", system-ui, -apple-system, Roboto, sans-serif;
  --mono: "JetBrains Mono", "Cascadia Code", "Fira Code", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --data-font: var(--mono);
  --gap-x: 8px;
  --gap-y: 6px;
  --field-margin: 8px;
  --ctl-pad: 4px 8px;
  --button-pad: 4px 12px;
  --button-small-pad: 2px 9px;
  --main-gap: 20px;
  --panel-pad: 20px 20px 16px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
}

body {
  overflow: auto;
  background: var(--bg);
  color: var(--text);
  font: 13px/1.35 var(--font);
}

/* The editor's root, which carries the theme, also carries its colours. */
[data-theme] { color: var(--text); font: 13px/1.35 var(--font); }

button, input, select, textarea { font: inherit; }

.app {
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  height: 100vh;
  max-width: var(--max-width);
  margin: 0 auto;
  min-width: var(--min-width);
  min-height: var(--min-height);
  background: var(--bg);
}

/* Menu bar */
.menubar {
  display: flex;
  gap: 2px;
  padding: 2px 4px;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}
.menubar details { position: relative; }
.menubar summary {
  list-style: none;
  padding: 2px 8px;
  cursor: default;
  user-select: none;
  border-radius: var(--radius);
}
.menubar summary::-webkit-details-marker { display: none; }
.menubar details[open] summary,
.menubar summary:hover,
.menubar summary:focus-visible { background: var(--menu-hover-bg); color: var(--menu-hover-text); outline: none; }
.menu {
  position: absolute;
  z-index: 20;
  top: 100%;
  left: 0;
  min-width: 230px;
  padding: 2px;
  background: var(--panel);
  border: var(--bw) solid;
  border-color: var(--bevel-out);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
}
.menu button {
  text-align: left;
  border: 0;
  border-radius: var(--radius);
  background: transparent;
  color: var(--text);
  padding: 3px 18px;
  display: flex;
  justify-content: space-between;
  gap: 24px;
}
.menu button:hover:not(:disabled), .menu button:focus-visible { background: var(--menu-hover-bg); color: var(--menu-hover-text); outline: none; box-shadow: none; }
.menu button:disabled { color: var(--text-disabled); }
.menu button[aria-checked="true"] > span:first-child::before { content: "\2713\00a0"; margin-left: -1.1em; }
.menu .shortcut { opacity: 0.75; }
.menu hr { width: 100%; border: 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--edge-light); margin: 2px 0; }

/* Notices under the menu */
.notices { display: flex; flex-direction: column; }
.notice {
  margin: 4px 6px 0;
  padding: 4px 8px;
  background: var(--notice-bg);
  color: var(--notice-text);
  border: 1px solid var(--notice-line);
  border-radius: var(--radius);
  display: flex;
  gap: 8px;
  align-items: baseline;
}
.notice.error { background: var(--notice-error-bg); color: var(--notice-error-text); border-color: var(--error-strong); }
.notice .grow { flex: 1; }
.notice ul { margin: 2px 0 0; padding-left: 18px; }

/* Main area */
.main {
  display: grid;
  grid-template-columns: minmax(240px, 300px) 1fr;
  gap: var(--main-gap);
  padding: 6px;
  min-height: 0;
}
.welcome {
  grid-column: 1 / -1;
  display: grid;
  place-content: center;
  text-align: center;
  gap: 10px;
}
.welcome h1 { font-size: 20px; margin: 0; display: grid; justify-items: center; gap: 2px; }
.welcome .logo { width: min(480px, 80vw); height: auto; }
.welcome .actions { align-items: center; }
.welcome .new-mod { justify-self: center; margin: 0; padding: 10px 16px 14px; display: grid; gap: 10px; }
.welcome .logo-button { padding: 8px 14px; height: 104px; display: inline-flex; align-items: center; justify-content: center; }
.welcome .logo-button img { display: block; width: 220px; height: auto; }
.welcome .open-mod { display: inline-flex; flex-direction: column; align-items: center; gap: 4px; padding: 8px 18px; }
.welcome .open-mod svg { display: block; width: 36px; height: 36px; }
.welcome .actions { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; }
.welcome .mod-info { text-align: left; justify-self: center; }
.welcome .new-mod legend { text-align: left; }

/* Guide dialog */
dialog.guide .body { width: min(700px, 86vw); line-height: 1.45; }
dialog.guide .body:focus { outline: none; }
dialog.guide h2 { font-size: 16px; margin: 18px 0 6px; }
dialog.guide h3 { font-size: 14px; margin: 14px 0 4px; }
dialog.guide p { margin: 6px 0; }
dialog.guide ol, dialog.guide ul { margin: 6px 0; padding-left: 24px; }
dialog.guide li { margin: 3px 0; }
dialog.guide table { border-collapse: collapse; margin: 8px 0; }
dialog.guide th, dialog.guide td { border: 1px solid var(--line); padding: 3px 8px; text-align: left; vertical-align: top; }
dialog.guide code { font-family: var(--mono, monospace); }
dialog.guide a { color: var(--link); }

/* About dialog */
dialog.about .body { display: grid; justify-items: center; gap: 10px; text-align: center; }
dialog.about p { margin: 0; }
dialog.about .logo { width: min(320px, 70vw); height: auto; }
dialog.about .thanks { text-align: left; }
dialog.about .thanks ul { margin: 4px 0 0; padding-left: 20px; }
dialog.about .jorsys { display: grid; justify-items: center; gap: 2px; color: var(--link); }
dialog.about .jorsys img { display: block; width: 200px; height: auto; }

.sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--gap-y);
  min-height: 0;
}
.sidebar .search-row { display: flex; gap: var(--gap-x); align-items: center; }
.sidebar .search-row input { flex: 1; min-width: 0; }
/* The item list's toolbar: view, filters and search, as small icon buttons. */
.tree-toolbar { display: flex; gap: 3px; align-items: center; min-height: 24px; }
.tree-toolbar .tool-group { display: inline-flex; gap: 0; margin-right: 3px; }
.tree-toolbar .grow { flex: 1; }
.tree-toolbar input[type="search"] { flex: 1; min-width: 0; }
/* Buttons under the item list, such as adding and removing items. */
.tree-actions { display: flex; flex-wrap: wrap; gap: 3px; }
/* Small buttons that stay focusable while disabled, to show why in a tooltip. */
button.small[aria-disabled="true"] { color: var(--text-disabled); cursor: default; }
[data-theme="dark"] button.small[aria-disabled="true"]:hover:not(:disabled) { border-color: var(--bevel-out); background: var(--button-bg); box-shadow: none; }
.icon-btn {
  width: 24px;
  height: 24px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: none;
}
.icon-btn .icon { display: inline-flex; }
.icon-btn .icon svg { display: block; }
.icon-btn .mark { margin: 0; }
.icon-btn[aria-pressed="true"] { border-color: var(--bevel-pressed); background: var(--panel-2); }
.icon-btn[aria-disabled="true"] { color: var(--text-disabled); cursor: default; }
.icon-btn[aria-disabled="true"] .icon { opacity: 0.6; }
.filters { display: flex; flex-wrap: wrap; gap: 4px 12px; }
.filters label { display: inline-flex; gap: 3px; align-items: center; }

/* Tree */
.tree {
  flex: 1;
  min-height: 0;
  overflow: auto;
  margin: 0;
  padding: 2px 0;
  list-style: none;
  background: var(--field-bg);
  color: var(--field-text);
  border: var(--bw) solid;
  border-color: var(--bevel-in);
  border-radius: var(--radius);
  font: 12px/1.35 var(--data-font);
}
.tree:focus { outline: 1px dotted var(--select-bg); outline-offset: -3px; }
.tree ul { list-style: none; margin: 0; padding: 0; }
.tree .row {
  display: flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
  padding: 1px 4px 1px calc(4px + var(--depth, 0) * 14px);
  cursor: default;
}
.tree .twisty { flex: none; width: 10px; display: inline-block; text-align: center; color: var(--field-muted); }
.tree .row:hover { background: var(--hover-bg); }
.tree [aria-selected="true"] > .row { background: var(--select-bg); color: var(--select-text); }
/* The keyboard cursor, which can rest on a group as well as on an item. */
.tree .cursor > .row { outline: 1px dotted var(--field-text); outline-offset: -1px; }
.tree .empty { padding: 6px; color: var(--field-muted); }
/* A long name is cut short so the row's marks stay visible at its right edge. */
.tree .row > .text { flex: 0 1 auto; min-width: 0; overflow: hidden; text-overflow: ellipsis; }
.tree .row > .marks { flex: none; }
/* A group's changed dot only says something inside it changed, so it's fainter. */
.tree [aria-expanded] > .row .mark.changed { opacity: 0.45; }
.tree.flat .twisty { display: none; }

/* Markers for changes, errors and warnings: different shapes and colours. */
.marks { display: inline-flex; gap: 2px; margin-left: auto; }
.mark {
  display: inline-block;
  min-width: 14px;
  padding: 0 2px;
  font: bold 10px/13px var(--font);
  text-align: center;
  border-radius: 2px;
}
/* The same dot as a changed field's mark. */
.mark.changed {
  align-self: center;
  width: 9px;
  height: 9px;
  min-width: 0;
  padding: 0;
  margin: 0 2px;
  border-radius: 50%;
  background: var(--changed-text);
  font-size: 0;
  color: transparent;
}
.mark.error { background: var(--error); color: #fff; border-radius: 7px; }
.mark.warning { background: var(--warning); color: #000; clip-path: polygon(50% 0, 100% 100%, 0 100%); padding: 1px 3px 0; }

/* Tabs */
.tabs-area { display: flex; flex-direction: column; min-height: 0; min-width: 0; }
.tablist { display: flex; gap: 0; padding-left: 4px; }
.tab {
  border: 2px solid;
  border-color: var(--edge-light) var(--edge-dark) transparent var(--edge-light);
  border-radius: 4px 4px 0 0;
  background: var(--panel);
  color: var(--text);
  padding: 3px 12px;
  margin-bottom: -2px;
  display: inline-flex;
  gap: 4px;
  align-items: center;
}
.tab[aria-selected="true"] { background: var(--panel); position: relative; z-index: 1; padding-top: 5px; font-weight: 600; }
.tab[aria-selected="false"] { background: var(--panel-2); margin-top: 3px; }
.tab:focus-visible { outline: var(--focus); outline-offset: -4px; }
.tabpanel {
  flex: 1;
  min-height: 0;
  overflow: auto;
  background: var(--panel);
  border: var(--bw) solid;
  border-color: var(--bevel-out);
  border-radius: 0 var(--radius) var(--radius) var(--radius);
  padding: var(--panel-pad);
}
.panel-title { margin: 0 0 10px; font-size: 15px; display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.panel-title .sub { font-weight: normal; color: var(--text-muted); font-size: 12px; }
.panel-title .unit-icon { width: 36px; height: 34px; image-rendering: pixelated; background: #000; }
.empty-panel { color: var(--text-muted); padding: 16px; }

fieldset {
  border: var(--fieldset-border);
  border-radius: var(--radius);
  margin: 0 0 12px;
  padding: 8px 12px 10px;
}
legend { padding: 0 4px; }

/* A field: label, control, original value and a ? button. */
.field {
  display: grid;
  grid-template-columns: 150px minmax(0, var(--field-width)) 20px;
  justify-content: start;
  gap: var(--gap-y) var(--gap-x);
  align-items: center;
  margin: var(--field-margin) 0;
}
.field > .label-cell { display: flex; justify-content: flex-end; align-items: center; gap: 5px; text-align: right; }
.field .controls { display: flex; gap: var(--gap-x); align-items: center; flex-wrap: wrap; min-width: 0; }
.field .note { grid-column: 2 / 4; font-size: 12px; color: var(--text-muted); }
.field .problem { grid-column: 2 / 4; font-size: 12px; padding: 1px 4px; border-radius: var(--radius); }
.field .problem.error { color: var(--problem-error-text); background: var(--problem-error-bg); }
.field .problem.warning { color: var(--problem-warning-text); background: var(--problem-warning-bg); }
.field .problem.unused { color: var(--problem-unused-text); background: var(--problem-unused-bg); }
/* The changed mark: a dot whose tooltip gives the original value. */
.changed-mark {
  flex: none;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--changed-text);
  cursor: help;
}
.changed-mark:focus-visible { outline: var(--focus); outline-offset: 2px; }
.field.changed > .label-cell > label, .field.changed > .label-cell > .label { font-weight: 600; }
.field.has-error .ctl { outline: 2px solid var(--error-strong); }
.field.has-warning .ctl { outline: 2px solid var(--warning); }

input[type="text"], input[type="number"], input[type="search"], select, textarea, .ctl {
  background: var(--field-bg);
  color: var(--field-text);
  border: var(--bw) solid;
  border-color: var(--bevel-in);
  border-radius: var(--radius);
  padding: var(--ctl-pad, 2px 4px);
  min-width: 0;
  font-family: var(--data-font);
}
input[type="number"] { width: 90px; }
select { max-width: 100%; }
select.wide, input.wide { flex: 1; min-width: 220px; }
input:focus, select:focus, textarea:focus { outline: var(--field-focus); }
input:disabled, select:disabled { color: var(--field-muted); }

button {
  background: var(--button-bg);
  color: var(--text);
  border: var(--bw) solid;
  border-color: var(--bevel-out);
  border-radius: var(--radius);
  padding: var(--button-pad, 2px 10px);
}
button:active:not(:disabled) { border-color: var(--bevel-pressed); }
button:disabled { color: var(--text-disabled); }
button:focus-visible { outline: var(--focus); outline-offset: -4px; }
button.link {
  border: 0;
  background: none;
  padding: 0 2px;
  color: var(--link);
  text-decoration: underline;
  cursor: pointer;
}
button.small { padding: var(--button-small-pad, 0 6px); }

/* Help: a real button that shows its text on hover and on focus. */
.help {
  position: relative;
  width: 18px;
  height: 18px;
  padding: 0;
  border-radius: 50%;
  font-size: 11px;
  font-weight: bold;
  line-height: 14px;
  flex: none;
}
/* The text is fixed to the window, placed by help.js, so panels that
   scroll can't clip it. */
.help .tip,
.changed-mark .tip,
.relabelled-mark .tip {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: max-content;
  max-width: 320px;
  padding: 5px 7px;
  background: var(--tip-bg);
  color: var(--tip-text);
  border: 1px solid var(--tip-line);
  border-radius: var(--radius);
  font: normal 12px/1.35 var(--font);
  text-align: left;
  white-space: normal;
  box-shadow: var(--shadow);
}
.help.show .tip, .changed-mark.show .tip, .relabelled-mark.show .tip { display: block; }

/* Status bar */
.statusbar {
  display: flex;
  gap: 2px;
  padding: 2px 4px;
  border-top: 1px solid var(--edge-light);
  background: var(--panel);
  font-family: var(--data-font);
}
.statusbar > * {
  padding: 1px 8px;
  border: 1px solid;
  border-color: var(--bevel-in);
  border-radius: var(--radius);
  white-space: nowrap;
}
.statusbar .file { flex: 1; overflow: hidden; text-overflow: ellipsis; }
.statusbar button.link { padding: 0; }

/* Button sets */
.buttonset-layout { display: flex; gap: 12px; align-items: flex-start; }
/* The box is as wide as its toolbar; the list fills it without widening it. */
/* The minimum width is what the toolbar took when it had Up, Down and Clear set. */
.buttonset-layout .buttons-box { width: max-content; min-width: 417px; flex: none; }
[data-theme="dark"] .buttonset-layout .buttons-box { min-width: 443px; }
.buttonset-layout .buttons-box .toolbar { flex-wrap: nowrap; }
.buttonset-layout .buttons-box .button-list-row > div { width: 0; min-width: 100%; }
.buttonset-layout .preview-box { padding-top: 8px; }
.button-list { list-style: none; margin: 0; padding: 0; background: var(--field-bg); color: var(--field-text); border: var(--bw) solid; border-color: var(--bevel-in); border-radius: var(--radius); min-height: 60px; font-family: var(--data-font); }
.button-list li { padding: 2px 6px; display: flex; gap: 6px; align-items: center; cursor: default; }
.button-list li > span:not(.pos):not(.mark):not(.marks):not(.grip) { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.button-list li:hover { background: var(--hover-bg); }
.button-list li[aria-selected="true"] { background: var(--select-bg); color: var(--select-text); }
.button-list li .pos { width: 22px; text-align: right; color: var(--field-muted); }
.button-list li[aria-selected="true"] .pos { color: inherit; }
.button-list:focus { outline: 1px dotted var(--select-bg); outline-offset: -3px; }
.original-list { list-style: none; margin: 0 0 6px; padding: 0; font-family: var(--data-font); }
.original-list li { padding: 1px 6px; display: flex; gap: 6px; align-items: center; }
.original-list li .pos { width: 22px; text-align: right; color: var(--field-muted); }
.original-buttons { margin: 6px 0; }
.differs-on { margin: 2px 0 6px; color: var(--field-muted); }
.original-diff-wrap { overflow-x: auto; max-width: 100%; }
.original-diff { border-collapse: collapse; font-family: var(--data-font); }
.original-diff th { text-align: left; font-size: 13px; padding: 2px 8px; border-bottom: 1px solid var(--line); }
.original-diff td { padding: 1px 8px; min-width: 200px; height: 30px; border-bottom: 1px solid var(--line); }
.original-diff .cell { display: flex; gap: 6px; align-items: center; white-space: nowrap; }
.original-diff .cell .pos { width: 22px; text-align: right; }
.diff-added { background: var(--diff-added-bg); color: var(--diff-added-text); }
.diff-missing { background: var(--diff-missing-bg); color: var(--diff-missing-text); }
.diff-changed { background: var(--diff-changed-bg); color: var(--diff-changed-text); }
.diff-key { margin: 4px 0; font-size: 12px; }
.diff-key span { padding: 1px 6px; border-radius: var(--radius); }
.toolbar { display: flex; gap: var(--gap-x); flex-wrap: wrap; margin: 8px 0 2px; align-items: center; }

.preview {
  display: grid;
  grid-template-columns: repeat(var(--cols, 3), 46px);
  gap: 3px;
  padding: 6px;
  background: var(--preview-bg);
  border: var(--bw) solid;
  border-color: var(--bevel-in);
  border-radius: var(--radius);
}
.slot {
  position: relative;
  width: 46px;
  height: 42px;
  padding: 0;
  border: 1px solid var(--slot-line);
  border-radius: var(--radius);
  background: var(--slot-bg);
  color: var(--field-text);
  display: grid;
  place-items: center;
  font-size: 9px;
  overflow: hidden;
}
.slot.filled { border-color: var(--slot-filled-line); background: var(--slot-filled-bg); }
.slot.selected { outline: 2px solid var(--slot-selected); outline-offset: -2px; }
.slot .count { position: absolute; right: 1px; top: 0; font-size: 9px; background: var(--warning); color: #000; padding: 0 2px; }
.slot img { image-rendering: pixelated; max-width: 36px; max-height: 34px; }
.slot .slotpos { position: absolute; left: 2px; bottom: 0; color: var(--slot-pos); font-size: 9px; }

.icon-ph {
  display: inline-grid;
  place-items: center;
  min-width: 28px;
  height: 22px;
  padding: 0 2px;
  border: 1px dashed var(--slot-pos);
  color: var(--field-muted);
  font-size: 9px;
  background: var(--slot-bg);
}
.icon-img { image-rendering: pixelated; width: 36px; height: 34px; background: #000; }
.icon-picker { display: grid; grid-template-columns: repeat(auto-fill, minmax(40px, 1fr)); gap: 2px; max-height: 260px; overflow: auto; background: var(--preview-bg); padding: 4px; }
.icon-picker button { padding: 1px; background: var(--slot-bg); border-color: var(--slot-line); }
.icon-picker button[aria-pressed="true"] { outline: 2px solid var(--slot-selected); }
.string-text { font-family: var(--mono); font-size: 12px; background: var(--string-bg); color: var(--string-text); padding: 2px 4px; border-radius: var(--radius); white-space: pre-wrap; word-break: break-word; grid-column: 2 / 4; }
.string-text .ctrl { color: var(--string-ctrl); }

.used-by { margin-top: 6px; }
.used-by ul { margin: 2px 0; padding-left: 18px; }
.used-by li::marker { color: var(--text-disabled); }

/* Requirements */
.rows { list-style: none; margin: 0; padding: 0; }
.req-row { display: flex; gap: var(--gap-x); align-items: center; padding: 3px 6px; margin: 2px 0; background: var(--row-bg); border-left: 4px solid transparent; flex-wrap: wrap; }
.req-row.or-row { background: var(--row-or-bg); }
.req-row.level-row { background: var(--row-level-bg); font-weight: 600; }
.req-row.in-level { margin-left: 15px; border-left-color: var(--row-level-line); }
.req-row.alt { border-left-color: var(--row-alt-line); }
.req-row.has-error { border-left-color: var(--error-strong); background: var(--row-error-bg); }
.req-row .idx { width: 22px; color: var(--row-idx); text-align: right; font-family: var(--data-font); }
.req-row .row-problem { flex-basis: 100%; margin-left: 28px; font-size: 12px; color: var(--error-strong); }
.req-columns { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 10px; }
.req-original .req-row { background: var(--row-original-bg); }

/* Constants */
.availability { border-collapse: collapse; font-size: 12px; margin-top: 4px; }
.availability th, .availability td { border: 1px solid var(--line); padding: 1px 6px; text-align: left; }
.availability .unknown { background: var(--avail-unknown-bg); }
.availability .not_applicable { background: var(--avail-na-bg); color: var(--avail-na-text); }

/* Problem list and report */
.problem-list { list-style: none; margin: 0; padding: 0; max-height: 50vh; overflow: auto; }
.problem-list li { display: flex; gap: 6px; padding: 2px 4px; align-items: baseline; }
.problem-list li + li { border-top: 1px solid var(--panel-2); }
.problem-list .path { font-family: var(--mono); font-size: 11px; color: var(--text-muted); }
.sev { font-weight: bold; font-size: 11px; padding: 0 4px; border-radius: var(--radius); }
.sev.error { background: var(--error); color: #fff; }
.sev.warning { background: var(--warning); color: #000; }

.report-table { border-collapse: collapse; width: 100%; }
.report-table th, .report-table td { border: 1px solid var(--line); padding: 2px 6px; text-align: left; vertical-align: top; }
.result-applies { color: var(--ok-text); font-weight: 600; }
.result-skipped { color: var(--skip-text); font-weight: 600; }
.result-rejected { color: var(--error-strong); font-weight: 600; }

dialog {
  background: var(--panel);
  color: var(--text);
  border: var(--bw) solid;
  border-color: var(--bevel-out);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 0;
  max-width: min(760px, 92vw);
  min-width: 340px;
}
dialog::backdrop { background: var(--backdrop); }
dialog .title { background: var(--dialog-title-bg); color: var(--dialog-title-text); padding: 3px 8px; font-weight: 600; }
dialog .body { padding: 10px; max-height: 70vh; overflow: auto; }
dialog .buttons { display: flex; gap: 6px; justify-content: flex-end; padding: 0 10px 10px; }
progress { width: 100%; }

.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* Compact rows and headings */
.with-help { display: inline-flex; gap: 3px; align-items: center; }
.req-row .ctl { max-width: 250px; }
.req-row input.ctl { width: 70px; }
.req-row .with-help select.wide { min-width: 0; }
.panel-title button { font-size: 12px; font-weight: normal; }
.panel-title button.title-label { font: inherit; color: inherit; text-shadow: inherit; background: none; border: 0; border-bottom: 1px dashed transparent; border-radius: 0; padding: 0; cursor: text; }
.panel-title button.title-label:hover { border-bottom-color: currentColor; }
.title-named { display: inline-flex; gap: 8px; align-items: center; }
.relabelled-mark .tip { text-shadow: none; }
.relabelled-mark { position: relative; padding: 0 5px; border: 1px solid currentColor; border-radius: var(--radius); font-size: 12px; font-weight: normal; line-height: 16px; color: var(--changed-text); opacity: 0.6; cursor: help; }
.relabelled-mark:hover, .relabelled-mark.show { opacity: 1; }
.relabelled-mark:focus-visible { outline: var(--focus); outline-offset: 2px; }
.title-edit { display: inline-flex; gap: 6px; align-items: center; }
.title-edit .title-input { font-size: 13px; font-weight: normal; min-width: 16em; }
.panel-title label.sub { display: inline-flex; gap: 3px; align-items: center; }
.range { font-size: 12px; color: var(--text-muted); }
.view { height: 100%; }

/* ---- Dark theme: touches the tokens can't express ---- */

[data-theme="dark"] .app {
  background:
    radial-gradient(1200px 600px at 85% -10%, rgba(62, 166, 255, 0.08), transparent 60%),
    radial-gradient(900px 500px at -10% 110%, rgba(34, 211, 238, 0.05), transparent 60%),
    var(--bg);
}

/* Menu and status bars: glass panels edged with a thin accent line. */
[data-theme="dark"] .menubar {
  padding: 4px 8px;
  background: rgba(11, 18, 32, 0.85);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 1px 0 rgba(62, 166, 255, 0.15);
}
[data-theme="dark"] .menu { padding: 4px; background: #0a1222; }
[data-theme="dark"] .menu hr { border-bottom: 0; border-top-color: var(--line); margin: 4px 2px; }
[data-theme="dark"] .statusbar { font-size: 12px; gap: 6px; padding: 4px 8px; border-top: 1px solid var(--line); color: var(--text-muted); }
[data-theme="dark"] .statusbar > * { border-color: transparent; background: var(--panel-2); }

/* Panels and lists */
[data-theme="dark"] .main { padding: 10px; }
[data-theme="dark"] .tree,
[data-theme="dark"] .button-list { padding: 4px 0; font-size: 12px; }
[data-theme="dark"] .tree [aria-selected="true"] > .row,
[data-theme="dark"] .button-list li[aria-selected="true"] {
  background: linear-gradient(90deg, rgba(62, 166, 255, 0.32), rgba(62, 166, 255, 0.1));
  box-shadow: inset 2px 0 0 var(--accent);
}
[data-theme="dark"] .tree:focus,
[data-theme="dark"] .button-list:focus { outline: none; border-color: var(--line-strong); }
[data-theme="dark"] fieldset { background: rgba(255, 255, 255, 0.015); }
[data-theme="dark"] legend {
  color: var(--accent);
  font: 600 11px/1 var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
[data-theme="dark"] .panel-title { font: 600 15px/1.3 var(--mono); color: #e3f1ff; letter-spacing: 0.01em; }
[data-theme="dark"] .panel-title .sub { font-family: var(--font); }
[data-theme="dark"] .welcome h1 { font-family: var(--mono); color: #e3f1ff; text-shadow: 0 0 18px rgba(62, 166, 255, 0.45); }

/* Tabs: flat, with an accent line under the selected one. */
[data-theme="dark"] .tablist { gap: 2px; padding-left: 4px; margin-bottom: 6px; }
[data-theme="dark"] .tab,
[data-theme="dark"] .tab[aria-selected="true"],
[data-theme="dark"] .tab[aria-selected="false"] {
  border: 0;
  border-radius: var(--radius) var(--radius) 0 0;
  margin: 0;
  padding: 6px 14px;
  background: transparent;
  color: var(--text-muted);
  font-weight: 500;
  box-shadow: none;
}
[data-theme="dark"] .tab:hover { color: var(--text); background: var(--hover-bg); }
[data-theme="dark"] .tab[aria-selected="true"] { color: #eaf6ff; background: var(--panel); box-shadow: inset 0 -2px 0 var(--accent); }
[data-theme="dark"] .tabpanel { border-color: var(--line); border-radius: var(--radius); }

/* Buttons and fields: flat, glowing on hover and focus. */
[data-theme="dark"] button:not(.link):not(.slot) { transition: border-color 0.12s, box-shadow 0.12s, background 0.12s; }
[data-theme="dark"] button:hover:not(:disabled):not(.link):not(.slot) { border-color: var(--accent); background: #12233f; }
[data-theme="dark"] .menu button:hover:not(:disabled) { background: var(--menu-hover-bg); }
[data-theme="dark"] button:active:not(:disabled):not(.link) { background: #0a1730; }
[data-theme="dark"] button:focus-visible { outline: none; box-shadow: var(--glow); }
[data-theme="dark"] input:focus,
[data-theme="dark"] select:focus,
[data-theme="dark"] textarea:focus { outline: none; border-color: var(--accent); box-shadow: var(--glow); }
[data-theme="dark"] button.link { text-decoration: none; border-bottom: 1px dashed rgba(92, 200, 255, 0.2); border-radius: 0; }
[data-theme="dark"] button.link:hover { color: var(--accent-2); border-bottom: 1px solid rgba(34, 211, 238, 0.45); }
[data-theme="dark"] .help { color: var(--accent); border-color: var(--line-strong); background: transparent; }
[data-theme="dark"] .help:hover { color: #fff; }
[data-theme="dark"] .field.has-error .ctl { outline: 1px solid var(--error); box-shadow: 0 0 8px rgba(255, 77, 109, 0.35); }
[data-theme="dark"] .field.has-warning .ctl { outline: 1px solid var(--warning); }

/* Command panel preview */
[data-theme="dark"] .slot.filled:hover { border-color: var(--accent); }
[data-theme="dark"] .slot.selected { box-shadow: 0 0 10px rgba(34, 211, 238, 0.5); }

/* Requirement rows */
[data-theme="dark"] .req-row { border-radius: 0 var(--radius) var(--radius) 0; margin: 2px 0; }
[data-theme="dark"] .req-row.in-level { margin-left: 15px; }

/* Dialogs */
[data-theme="dark"] dialog { border-color: var(--line-strong); box-shadow: var(--shadow), 0 0 0 1px rgba(62, 166, 255, 0.12); }
[data-theme="dark"] dialog .title { padding: 6px 10px; font-family: var(--mono); letter-spacing: 0.02em; border-bottom: 1px solid var(--line-strong); }

/* Scrollbars */
[data-theme="dark"] * { scrollbar-color: #2b4370 transparent; scrollbar-width: thin; }

/* Glow: panels edged in light, lit text on what's selected or a heading. */
[data-theme="dark"] .menubar { box-shadow: 0 1px 0 rgba(62, 166, 255, 0.35), 0 4px 20px rgba(62, 166, 255, 0.14); }
[data-theme="dark"] .statusbar { box-shadow: 0 -1px 0 rgba(62, 166, 255, 0.25), 0 -4px 20px rgba(62, 166, 255, 0.08); }
[data-theme="dark"] .menu { border-color: rgba(62, 166, 255, 0.45); box-shadow: var(--shadow), 0 0 22px rgba(62, 166, 255, 0.22); }
[data-theme="dark"] .menubar details[open] summary { box-shadow: 0 0 12px rgba(62, 166, 255, 0.45); }
[data-theme="dark"] .tabpanel {
  border-color: rgba(62, 166, 255, 0.28);
  box-shadow: var(--glow-soft), inset 0 0 60px rgba(62, 166, 255, 0.035);
}
[data-theme="dark"] .tree,
[data-theme="dark"] .button-list,
[data-theme="dark"] .preview {
  border-color: rgba(62, 166, 255, 0.25);
  box-shadow: inset 0 0 22px rgba(62, 166, 255, 0.07), 0 0 14px rgba(62, 166, 255, 0.06);
}
[data-theme="dark"] fieldset { border-color: rgba(62, 166, 255, 0.2); box-shadow: inset 0 0 30px rgba(62, 166, 255, 0.03); }
[data-theme="dark"] .tree [aria-selected="true"] > .row,
[data-theme="dark"] .button-list li[aria-selected="true"] {
  text-shadow: var(--glow-text);
  box-shadow: inset 2px 0 0 var(--accent), inset 0 0 16px rgba(62, 166, 255, 0.22), 0 0 12px rgba(62, 166, 255, 0.18);
}
[data-theme="dark"] .tab[aria-selected="true"] {
  text-shadow: var(--glow-text);
  box-shadow: inset 0 -2px 0 var(--accent), 0 8px 16px -8px rgba(62, 166, 255, 0.9);
}
[data-theme="dark"] legend { text-shadow: 0 0 8px rgba(62, 166, 255, 0.8); }
[data-theme="dark"] .panel-title { text-shadow: 0 0 14px rgba(62, 166, 255, 0.5); }
[data-theme="dark"] button:hover:not(:disabled):not(.link):not(.slot) { box-shadow: 0 0 12px rgba(62, 166, 255, 0.45), inset 0 0 8px rgba(62, 166, 255, 0.15); }
[data-theme="dark"] .menu button:hover:not(:disabled) { box-shadow: inset 0 0 12px rgba(62, 166, 255, 0.25); text-shadow: var(--glow-text); }
[data-theme="dark"] input:hover:not(:focus):not(:disabled),
[data-theme="dark"] select:hover:not(:focus):not(:disabled) { border-color: var(--line-strong); box-shadow: 0 0 8px rgba(62, 166, 255, 0.15); }
[data-theme="dark"] .help { box-shadow: 0 0 6px rgba(62, 166, 255, 0.25); }
[data-theme="dark"] .help:hover, [data-theme="dark"] .help.show { box-shadow: 0 0 12px rgba(62, 166, 255, 0.7); text-shadow: var(--glow-text); }
[data-theme="dark"] .help .tip,
[data-theme="dark"] .changed-mark .tip,
[data-theme="dark"] .relabelled-mark .tip { box-shadow: var(--shadow), 0 0 18px rgba(62, 166, 255, 0.3); }
[data-theme="dark"] .changed-mark { box-shadow: 0 0 6px rgba(245, 197, 66, 0.9), 0 0 12px rgba(245, 197, 66, 0.4); }
[data-theme="dark"] .changed-mark:hover, [data-theme="dark"] .changed-mark.show { box-shadow: 0 0 8px rgba(245, 197, 66, 1), 0 0 18px rgba(245, 197, 66, 0.6); }
[data-theme="dark"] .changed-mark:focus-visible { outline: none; box-shadow: 0 0 0 2px var(--accent), 0 0 12px rgba(245, 197, 66, 0.9); }
[data-theme="dark"] .relabelled-mark { box-shadow: 0 0 5px rgba(245, 197, 66, 0.35); }
[data-theme="dark"] .relabelled-mark:hover, [data-theme="dark"] .relabelled-mark.show { box-shadow: 0 0 8px rgba(245, 197, 66, 0.6); }
[data-theme="dark"] .mark.changed { box-shadow: 0 0 6px rgba(245, 197, 66, 0.6); }
[data-theme="dark"] .mark.error { box-shadow: 0 0 7px rgba(255, 77, 109, 0.7); }
[data-theme="dark"] .mark.warning { filter: drop-shadow(0 0 3px rgba(255, 165, 61, 0.8)); }
[data-theme="dark"] .slot.filled { box-shadow: inset 0 0 10px rgba(62, 166, 255, 0.12); }
[data-theme="dark"] .slot.filled:hover { box-shadow: 0 0 10px rgba(62, 166, 255, 0.45); }
[data-theme="dark"] .slot.selected { box-shadow: 0 0 14px rgba(34, 211, 238, 0.7), inset 0 0 10px rgba(34, 211, 238, 0.3); }
[data-theme="dark"] .statusbar button.link:hover { text-shadow: var(--glow-text); }
[data-theme="dark"] dialog { border-color: rgba(62, 166, 255, 0.5); box-shadow: var(--shadow), 0 0 40px rgba(62, 166, 255, 0.22); }
[data-theme="dark"] dialog .title { text-shadow: var(--glow-text); box-shadow: 0 1px 12px rgba(62, 166, 255, 0.25); }

/* The application is centred, with edges, when the window is wider. */
.app { border-inline: 1px solid var(--line); }
[data-theme="dark"] .app { border-inline-color: rgba(62, 166, 255, 0.18); box-shadow: 0 0 60px rgba(62, 166, 255, 0.07); }
[data-theme="dark"] .tree .cursor > .row { outline: 1px solid rgba(34, 211, 238, 0.75); outline-offset: -1px; box-shadow: 0 0 10px rgba(34, 211, 238, 0.3); }
[data-theme="dark"] .tree .cursor[aria-selected="true"] > .row { box-shadow: inset 2px 0 0 var(--accent), inset 0 0 16px rgba(62, 166, 255, 0.22), 0 0 12px rgba(34, 211, 238, 0.35); }

/* Dragging */
.grip { color: var(--field-muted); cursor: grab; user-select: none; touch-action: none; font-size: 14px; line-height: 1; flex: none; }
.grip::before { content: "\283F"; }
.button-list li .grip { opacity: 0.6; }
.button-list li[aria-selected="true"] .grip { color: inherit; }
.button-list li:hover .grip { opacity: 1; }
.req-row .grip:hover { color: var(--field-text); }
/* Less space on both sides of the grip than the row padding and flex gap give. */
.button-list li .grip { margin: 0 -3px; }
.req-row .grip { margin: 0 calc(var(--gap-x) * -0.75); }
.button-list li:not(.empty) { cursor: grab; }
.slot.draggable { cursor: grab; touch-action: none; }
.drag-source { opacity: 0.4; }
.drop-before { box-shadow: inset 0 3px 0 var(--slot-selected); }
.drop-after { box-shadow: inset 0 -3px 0 var(--slot-selected); }
.slot.drop-target { outline: 2px dashed var(--slot-selected); outline-offset: -2px; }
.drag-ghost { position: fixed; z-index: 1000; margin: 0; pointer-events: none; opacity: 0.7; box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4); }
html.dragging, html.dragging * { cursor: grabbing !important; user-select: none !important; }
.preview { position: relative; }
.slot.drop-pushed { outline: 2px dashed var(--warning); outline-offset: -2px; }
.drop-gap { position: absolute; width: 3px; background: var(--slot-selected); border-radius: 2px; pointer-events: none; }
.button-list li.drop-target { outline: 2px dashed var(--slot-selected); outline-offset: -2px; }
.button-list li.drop-pushed { outline: 2px dashed var(--warning); outline-offset: -2px; }
.req-row .row-tools { margin-left: auto; display: inline-flex; gap: var(--gap-x); align-items: center; }
.icon-button { display: inline-flex; align-items: center; justify-content: center; }
.icon-button svg { display: block; }

/* Item list toolbar in the dark theme: pressed toggles glow; disabled ones don't react. */
[data-theme="dark"] .icon-btn[aria-pressed="true"] { border-color: var(--accent); background: #12233f; color: var(--accent-2); box-shadow: inset 0 0 8px rgba(62, 166, 255, 0.25); }
[data-theme="dark"] button.icon-btn[aria-disabled="true"]:hover:not(:disabled):not(.link) { border-color: var(--bevel-out); background: var(--button-bg); box-shadow: none; }