:root {
  --bg: #e9edf2;
  --chrome: #f7f8fa;
  --line: #d3d9e1;
  --text: #1d2733;
  --muted: #5d6b7b;
  --accent: #1f5fbf;
  --accent-soft: #dde8f8;
  --sel: #0a84ff;
  --danger: #d93025;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  display: grid; grid-template-rows: 40px auto 1fr 32px; background: var(--bg); color: var(--text);
  font: 13px/1.35 var(--font); overflow: hidden; user-select: none;
}
button, input, select, textarea { font: inherit; color: inherit; }

/* ---- top bar & menus ---- */
.topbar { display: flex; align-items: center; gap: 10px; padding: 0 10px; background: var(--chrome); border-bottom: 1px solid var(--line); min-width: 0; }
.brand { display: flex; align-items: center; gap: 7px; font-weight: 700; white-space: nowrap; }
.menu { position: relative; }
.menu-list {
  position: fixed; z-index: 50; min-width: 250px; background: #fff; border: 1px solid var(--line); border-radius: 8px;
  box-shadow: 0 10px 30px rgba(20, 30, 50, .18); padding: 5px; display: none; max-height: calc(100vh - 60px); overflow-y: auto;
}
.menu.open .menu-list { display: block; }
.menu-list button {
  display: flex; width: 100%; justify-content: space-between; gap: 18px; border: 0; background: none; text-align: left;
  padding: 6px 10px; border-radius: 5px; cursor: pointer;
}
.menu-list button:hover:not(:disabled) { background: var(--accent-soft); }
.menu-list button:disabled { color: #a0a9b4; cursor: default; }
.menu-list kbd { color: var(--muted); font: 12px var(--font); }
/* Menu item icons: a fixed slot so labels line up; toolbar icons are line drawings, the rest filled. */
.menu-list button span { flex: 1; }
.menu-list .mi { width: 18px; height: 18px; flex: none; display: grid; place-items: center; margin-right: -8px; color: #4a5563; }
.menu-list .mi svg { width: 18px; height: 18px; fill: currentColor; }
.menu-list .mi.tool-ic svg { fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.menu-list .mi.tool-ic svg .thin { stroke-width: 1; opacity: .7; }
.menu-list .mi.tool-ic svg .red { stroke: var(--danger); }
.menu-list .mi.tool-ic svg .fillc { fill: currentColor; }
.menu-list button:disabled .mi { opacity: .45; }
.menu-list hr { border: 0; border-top: 1px solid var(--line); margin: 4px 6px; }
.menu-list .check::before { content: "✓ "; }
.panel-toggle { display: none; }

/* ---- workspace ---- */
.workspace { display: grid; grid-template-columns: 46px 1fr 270px; min-height: 0; }
.toolbar {
  background: var(--chrome); border-right: 1px solid var(--line); padding: 6px; display: grid;
  grid-template-columns: 1fr; justify-items: center; align-content: start; gap: 3px; overflow-y: auto;
}
.toolbar hr { grid-column: 1 / -1; width: 100%; border: 0; border-top: 1px solid var(--line); margin: 3px 0; }
.tool {
  width: 30px; height: 30px; display: grid; place-items: center; border: 1px solid transparent; border-radius: 7px;
  background: none; cursor: pointer; padding: 0;
}
.tool:hover { background: var(--accent-soft); }
.tool.on { background: var(--accent); border-color: var(--accent); color: #fff; }
.tool svg { fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.tool svg .thin { stroke-width: 1; opacity: .7; }
.tool svg .red { stroke: var(--danger); }
.tool.on svg .red { stroke: #ffd2cc; }
.tool svg .fillc { fill: currentColor; }
/* View buttons on the rail use the menus' (filled) icons. */
.tool.view .mi { width: 20px; height: 20px; display: grid; place-items: center; }
.tool.view .mi svg { width: 20px; height: 20px; fill: currentColor; stroke: none; }

.stage { position: relative; min-width: 0; min-height: 0; overflow: hidden; }
#canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; background: var(--bg); outline: none; touch-action: none; }
#canvas.crosshair { cursor: crosshair; }
#canvas.grab { cursor: grab; }
#page { fill: #fff; }
#pageShadow { fill: #fff; }
#mat { fill: #d9e2e8; stroke: #b7c4cd; stroke-width: 0.5; }
.grid-minor { stroke: #e3e8ef; }
.grid-major { stroke: #cdd5df; }
.drop-hint {
  position: absolute; inset: 14px; border: 3px dashed var(--accent); border-radius: 14px; display: none; place-items: center;
  font-size: 20px; font-weight: 600; color: var(--accent); background: rgba(221, 232, 248, .7); pointer-events: none;
}
.stage.dropping .drop-hint { display: grid; }

/* overlay */
#overlay path, #overlay rect, #overlay circle { fill: none; stroke-width: 1; }
.ov { stroke: var(--sel); }
.preview { stroke: var(--sel); stroke-dasharray: 5 3; }
.sel-outline { stroke: var(--sel); stroke-width: 1.5 !important; opacity: .65; }
.sel-box { stroke: var(--sel); stroke-dasharray: 4 3; }
.handle { fill: #fff !important; stroke: var(--sel); }
.handle.rot { fill: var(--accent-soft) !important; }
.node { fill: #fff !important; stroke: var(--text); }
.node.on { fill: var(--sel) !important; stroke: var(--sel); }
.handle-line { stroke: var(--sel); opacity: .7; }
.picked { fill: var(--sel) !important; stroke: none; }
.rubber { stroke: var(--sel); fill: rgba(10, 132, 255, .07) !important; }
.rubber.crossing { stroke-dasharray: 5 3; fill: rgba(40, 180, 90, .08) !important; stroke: #1e9e50; }
.snap { stroke: #ff7a00; stroke-width: 2 !important; }
.measure { stroke: #ff7a00; stroke-dasharray: 6 3; }
.trim-gone { stroke: var(--danger); stroke-width: 3 !important; opacity: .55; }
.ov-label { fill: #fff; paint-order: stroke; stroke: rgba(29, 39, 51, .85) !important; stroke-width: 3px !important; stroke-linejoin: round; font-family: var(--font); }

/* ---- right panel ---- */
.panel { background: var(--chrome); border-left: 1px solid var(--line); overflow-y: auto; padding: 10px 12px 30px; user-select: text; }
.panel h3 { margin: 14px 0 6px; font-size: 11px; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
.panel h3:first-child { margin-top: 2px; }
.panel .info { color: var(--muted); margin: 0 0 6px; }
.field { display: grid; grid-template-columns: 1fr 1.25fr; align-items: center; gap: 6px; margin: 5px 0; }
.field.check { grid-template-columns: auto 1fr; }
.field label, .field > span { color: var(--muted); }
.grid4 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 6px 8px; }
.grid4 label { display: grid; grid-template-columns: 16px 1fr; align-items: center; gap: 4px; color: var(--muted); }
input[type=number], input[type=text], input[type=search], select, textarea, .statusbar input {
  width: 100%; min-width: 0; border: 1px solid var(--line); border-radius: 6px; padding: 4px 6px; background: #fff;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }
.swatches { display: flex; flex-wrap: wrap; gap: 4px; margin: 4px 0; }
.swatch { width: 24px; height: 24px; border-radius: 6px; border: 1px solid rgba(0, 0, 0, .2); cursor: pointer; padding: 0; position: relative; }
.swatch.on { outline: 2px solid var(--accent); outline-offset: 1px; }
.swatch.none { background: linear-gradient(135deg, #fff 45%, var(--danger) 45% 55%, #fff 55%); }
.swatch input { position: absolute; inset: 0; opacity: 0; cursor: pointer; width: 100%; height: 100%; }
.swatch.custom { background: conic-gradient(red, yellow, lime, cyan, blue, magenta, red); }
.btns { display: flex; flex-wrap: wrap; gap: 4px; }
.btn { border: 1px solid var(--line); background: #fff; border-radius: 6px; padding: 5px 9px; cursor: pointer; }
.btn:hover { border-color: var(--accent); background: var(--accent-soft); }
.btn.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.legend { font-size: 12px; color: var(--muted); margin: 4px 0 0; }
.legend b { display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin-right: 3px; vertical-align: -1px; }

.layers { border: 1px solid var(--line); border-radius: 8px; background: #fff; overflow: hidden; }
.layer { display: grid; grid-template-columns: 26px 26px 1fr 26px; align-items: center; border-bottom: 1px solid var(--line); }
.layer:last-child { border-bottom: 0; }
.layer.current { background: var(--accent-soft); }
.layer button { border: 0; background: none; cursor: pointer; height: 28px; }
.layer .name { text-align: left; padding: 0 4px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.layer .off { opacity: .35; }

/* ---- status bar ---- */
.statusbar {
  display: flex; align-items: center; gap: 10px; padding: 0 10px; background: var(--chrome); border-top: 1px solid var(--line);
  min-width: 0; white-space: nowrap;
}
.prompt { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; }
.prompt.message { color: var(--accent); font-weight: 600; }
.coord-entry { display: flex; align-items: center; gap: 5px; color: var(--muted); }
.coord-entry input { width: 120px; padding: 2px 6px; font-family: ui-monospace, monospace; }
.cursor-pos { font-family: ui-monospace, monospace; color: var(--muted); min-width: 150px; }
.snaps { display: flex; gap: 2px; }
.snaps button { border: 1px solid var(--line); background: #fff; border-radius: 5px; padding: 1px 6px; cursor: pointer; font-size: 12px; color: var(--muted); }
.snaps button.on { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); }
.zoom { color: var(--muted); min-width: 46px; text-align: right; }

/* ---- dialogs ---- */
dialog.dlg { border: 0; border-radius: 12px; padding: 0; box-shadow: 0 20px 60px rgba(20, 30, 50, .3); width: min(420px, calc(100vw - 32px)); user-select: text; }
dialog.dlg::backdrop { background: rgba(20, 30, 50, .3); }
.dlg form { padding: 18px 20px; }
.dlg h2 { margin: 0 0 12px; font-size: 17px; }
.dlg-note { color: var(--muted); white-space: pre-line; margin: 0 0 10px; }
.dlg-row { display: grid; grid-template-columns: 150px 1fr; gap: 8px; align-items: center; margin: 8px 0; }
.dlg-row.check { grid-template-columns: 150px auto; justify-content: start; }
.dlg-row small { grid-column: 2; color: var(--muted); }
.dlg-row textarea { resize: vertical; font-size: 15px; }
.dlg-buttons { display: flex; justify-content: flex-end; gap: 8px; margin-top: 16px; }
.dlg-buttons button { border: 1px solid var(--line); background: #fff; border-radius: 7px; padding: 6px 14px; cursor: pointer; }
.dlg-buttons .primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.keys { columns: 2; font-size: 12px; margin: 0; padding: 0; list-style: none; }
.keys li { margin: 2px 0; }
.keys kbd { display: inline-block; min-width: 54px; color: var(--accent); font-weight: 600; }

@media (max-width: 900px) {
  .workspace { grid-template-columns: 46px 1fr; }
  .panel { position: fixed; right: 0; top: 40px; bottom: 32px; width: 260px; z-index: 20; box-shadow: -8px 0 20px rgba(0, 0, 0, .12); transform: translateX(100%); transition: transform .2s; }
  body.panel-open .panel { transform: none; }
  .cursor-pos, .snaps { display: none; }
  .panel-toggle { display: inline-block; }
}
@media (max-width: 600px) {
  .brand { font-size: 0; gap: 0; }
  .coord-entry span { display: none; }
}

/* stamp library */
.stamp-search, .stamp-cat { margin: 0 0 6px; }
.stamp-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 4px; max-height: 330px; overflow-y: auto; padding: 2px; }
.stamp {
  position: relative; display: grid; justify-items: center; gap: 2px; padding: 5px 2px 3px; border: 1px solid var(--line);
  border-radius: 8px; background: #fff; cursor: pointer; min-width: 0;
}
.stamp:hover { border-color: var(--accent); background: var(--accent-soft); }
.stamp.on { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-soft); background: var(--accent-soft); }
.stamp svg { width: 34px; height: 34px; fill: var(--text); }
.stamp svg.mine { fill: none; }
.stamp span { font-size: 10px; line-height: 1.15; color: var(--muted); width: 100%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.stamp i { position: absolute; top: 1px; right: 3px; font-style: normal; font-size: 11px; color: var(--danger); opacity: 0; }
.stamp:hover i { opacity: 1; }

/* laser check & preview */
#canvas.simulating #content { opacity: .18; }
#sim path { stroke-width: 1.5; }
.sim-now { fill: none; stroke-width: 2.5 !important; vector-effect: non-scaling-stroke; }
.sim-head { fill: #ff2a00; stroke: #fff; stroke-width: 1; vector-effect: non-scaling-stroke; filter: drop-shadow(0 0 3px #ff6a00); }
.sim-bar {
  position: absolute; left: 50%; bottom: 14px; transform: translateX(-50%); width: min(640px, calc(100% - 24px));
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px; padding: 10px 12px; background: #fff;
  border: 1px solid var(--line); border-radius: 12px; box-shadow: 0 10px 30px rgba(20, 30, 50, .2); z-index: 10;
}
.sim-bar .sim-step { flex: 1; color: var(--muted); min-width: 120px; }
.sim-bar select { width: auto; }
.sim-progress { flex-basis: 100%; height: 6px; border-radius: 3px; background: var(--accent-soft); overflow: hidden; }
.sim-progress i { display: block; height: 100%; width: 0; background: #ff2a00; }
.sim-bar small { color: var(--muted); }
dialog.check { width: min(520px, calc(100vw - 32px)); }
.issues { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.issues li { border: 1px solid var(--line); border-left: 4px solid #e8a200; border-radius: 8px; padding: 8px 10px; }
.issues p { margin: 4px 0 6px; color: var(--muted); }
.issues .count { display: inline-block; min-width: 22px; text-align: center; border-radius: 11px; background: #fff1cc; color: #8a5a00; font-size: 12px; padding: 0 6px; }
.ok-msg { color: #1e8e3e; font-weight: 600; font-size: 15px; }

/* class stamps share button */
.stamp b { position: absolute; top: 1px; left: 4px; font-size: 12px; color: var(--accent); opacity: 0; font-weight: 700; }
.stamp:hover b { opacity: 1; }
.sent .st { margin: 4px 0 0; }
.muted { color: var(--muted); }

/* step-by-step guide card */
.guide-card {
  position: absolute; top: 12px; right: 12px; width: min(330px, calc(100% - 24px)); background: #fff; border: 1px solid var(--line);
  border-left: 5px solid var(--accent); border-radius: 12px; box-shadow: 0 10px 30px rgba(20, 30, 50, .18); padding: 10px 12px; z-index: 9; user-select: text;
}
.guide-card .g-head { display: flex; align-items: center; gap: 8px; }
.guide-card .g-head span { color: var(--muted); font-size: 12px; flex: 1; }
.guide-card .g-head button { border: 0; background: none; cursor: pointer; font-size: 14px; color: var(--muted); }
.guide-card p { margin: 8px 0; line-height: 1.45; }
.guide-card kbd { background: #eef1f5; border: 1px solid var(--line); border-radius: 4px; padding: 0 4px; font: 12px ui-monospace, monospace; }
.guide-card .g-state { color: var(--muted); font-size: 12px; }
.guide-card .g-state.ok { color: #1e8e3e; font-weight: 700; }
.guide-card .btn:disabled { opacity: .4; cursor: default; }

/* rulers & guides */
.ruler { position: absolute; display: none; z-index: 2; cursor: copy; touch-action: none; }
.stage.rulers .ruler, .stage.rulers .ruler-corner { display: block; }
.ruler.top { top: 0; left: 20px; right: 0; height: 20px; width: calc(100% - 20px); border-bottom: 1px solid var(--line); }
.ruler.left { top: 20px; left: 0; bottom: 0; width: 20px; height: calc(100% - 20px); border-right: 1px solid var(--line); }
.ruler-corner { position: absolute; top: 0; left: 0; width: 20px; height: 20px; background: #eef1f5; border: solid var(--line); border-width: 0 1px 1px 0; display: none; z-index: 2; }
.stage.rulers #canvas { top: 20px; left: 20px; width: calc(100% - 20px); height: calc(100% - 20px); }
.guide { stroke: #00a3c4; stroke-dasharray: 6 4; fill: none; }
.guide.draft { stroke: #ff7a00; }

/* touch: Done / Undo point / Cancel while drawing */
.touch-bar { position: absolute; left: 50%; bottom: 14px; transform: translateX(-50%); display: flex; gap: 8px; padding: 8px;
  background: #fff; border: 1px solid var(--line); border-radius: 12px; box-shadow: 0 8px 24px rgba(20, 30, 50, .18); z-index: 8; }
.touch-bar[hidden] { display: none; }
.touch-bar .btn { padding: 10px 16px; font-size: 15px; }
@media (pointer: coarse) {
  .tool { width: 40px; height: 40px; }
  .workspace { grid-template-columns: 56px 1fr 270px; }
  .menu-list button { padding: 10px 12px; }
  .snaps button { padding: 4px 8px; }
}
@media (pointer: coarse) and (max-width: 900px) { .workspace { grid-template-columns: 56px 1fr; } }

/* colour key list */
.colour-list { display: grid; gap: 3px; }
.colour-row { display: grid; grid-template-columns: 22px 1fr auto; align-items: center; gap: 6px; border: 1px solid var(--line); background: #fff; border-radius: 6px; padding: 3px 6px; cursor: pointer; text-align: left; }
.colour-row:hover { border-color: var(--accent); background: var(--accent-soft); }
.colour-row i { width: 18px; height: 12px; border-radius: 3px; display: block; }
.colour-row i.line { height: 0; border-top: 3px solid; border-radius: 0; }
.colour-row small { color: var(--muted); }
.colour-row.warn { border-color: #e8a200; }

/* offline & versions */
.net { background: #fff1cc; color: #8a5a00; border-radius: 10px; padding: 1px 8px; font-size: 12px; font-weight: 600; }
.net[hidden] { display: none; }
.net.reply { background: #dcf5e3; color: #1e7a3c; border: 0; cursor: pointer; font-family: inherit; animation: reply-pulse 1.2s ease-in-out 3; }
@keyframes reply-pulse { 50% { box-shadow: 0 0 0 4px #1e7a3c33; } }
@media (prefers-reduced-motion: reduce) { .net.reply { animation: none; } }
.sent li.new-reply { border-left-color: #1e7a3c; background: #f2fbf4; }
.vlist { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; max-height: 55vh; overflow-y: auto; }
.vlist li { display: grid; grid-template-columns: 70px 1fr auto; gap: 10px; align-items: center; border: 1px solid var(--line); border-radius: 8px; padding: 6px; }
.vpic { width: 70px; height: 50px; display: grid; place-items: center; background: #f3f5f8; border-radius: 4px; overflow: hidden; }
.vpic img { max-width: 100%; max-height: 100%; background: #fff; }

/* trace window */
dialog.trace-dlg { width: min(900px, calc(100vw - 24px)); }
.trace-body { display: grid; grid-template-columns: 1.4fr 1fr; gap: 16px; align-items: start; }
.trace-preview { display: grid; justify-items: center; gap: 6px; background: #f3f5f8; border-radius: 10px; padding: 8px; min-height: 200px; }
.trace-preview canvas { border-radius: 6px; box-shadow: 0 1px 4px rgba(0, 0, 0, .12); max-width: 100%; }
.trace-show { color: var(--muted); font-size: 12px; display: flex; gap: 6px; align-items: center; }
.trace-controls { display: grid; gap: 12px; }
.trace-controls label { display: grid; gap: 3px; font-weight: 600; }
.trace-controls label.check { display: flex; gap: 6px; align-items: center; font-weight: 400; }
.trace-controls small { color: var(--muted); font-weight: 400; }
.trace-controls .val { color: var(--accent); font-weight: 600; margin-left: 4px; }
.trace-controls .row { display: flex; gap: 6px; align-items: center; }
.trace-controls input[type=range] { width: 100%; accent-color: var(--accent); }
.seg { display: flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.seg button { flex: 1; border: 0; background: #fff; padding: 7px 6px; cursor: pointer; }
.seg button + button { border-left: 1px solid var(--line); }
.seg button.on { background: var(--accent); color: #fff; }
.trace-info { margin: 0; color: var(--muted); min-height: 2.6em; }
@media (max-width: 700px) { .trace-body { grid-template-columns: 1fr; } }

.dlg .steps { margin: 6px 0 10px; padding-left: 20px; line-height: 1.5; }
.dlg .steps li { margin: 4px 0; }

.tool:disabled { opacity: .35; cursor: default; }
.tool:disabled:hover { background: none; }

/* history panel */
.history { list-style: none; margin: 0; padding: 0; display: grid; gap: 1px; max-height: 220px; overflow-y: auto; border: 1px solid var(--line); border-radius: 8px; background: #fff; }
.history button { width: 100%; text-align: left; border: 0; background: none; padding: 4px 8px; cursor: pointer; font-size: 12px; }
.history button:hover { background: var(--accent-soft); }
.history button.now { font-weight: 700; color: var(--accent); }
.history .future button { color: #a0a9b4; }

/* ---- MakerCAD theme: dark header, side bars and status bar, orange highlights ----
   The dark areas get their own colour variables, so everything inside them follows;
   the drawing page, dialogs and drop-down menus stay light. */
:root { --accent: #c2570c; --accent-soft: #fdebd9; --accent-bright: #f28c28; }
.topbar, .ribbon, .toolbar, .panel, .statusbar {
  --chrome: #1b222b; --text: #e8edf3; --muted: #9eabbb; --line: #333e4b; --field: #252f3b;
  --accent-soft: rgba(242, 140, 40, .2);
  color: var(--text); color-scheme: dark;
}
.topbar { border-bottom-color: #10161d; }
.brand { color: #fff; }
.menu-list { --text: #1d2733; --muted: #5d6b7b; --line: #d3d9e1; --accent-soft: #fdebd9; color: var(--text); color-scheme: light; }
.toolbar hr { border-top-color: var(--line); }
.tool.on { background: var(--accent-bright); border-color: var(--accent-bright); color: #1b222b; }
.tool.on svg .red { stroke: #7a1d00; }
.panel h3 { color: var(--accent-bright); }
:is(.topbar, .toolbar, .panel, .statusbar) :is(input[type=number], input[type=text], input[type=search], select, textarea, .btn, .layers, .colour-row, .history, .seg button, .snaps button) {
  background: var(--field); border-color: var(--line); color: var(--text);
}
:is(.panel, .statusbar) .btn.primary, .panel .seg button.on { background: var(--accent-bright); border-color: var(--accent-bright); color: #1b222b; }
.panel .btn:hover:not(:disabled), .statusbar .snaps button:hover { border-color: var(--accent-bright); }
.statusbar .snaps button.on { background: rgba(242, 140, 40, .22); border-color: var(--accent-bright); color: #fff; }
.panel .history button.now { color: var(--accent-bright); }
.panel .swatch { border-color: #56636f; }
/* Stamp tiles stay white so the black pictures show. */
.panel .stamp { --text: #1d2733; --muted: #5d6b7b; color: var(--text); background: #fff; border-color: #d3d9e1; }
.panel .stamp:hover { background: #fdebd9; border-color: var(--accent); }

/* Demo mode (demo.js): a badge in the top bar, and the browser's own Print gives a blank page. */
.demo-badge { margin-left: auto; background: var(--accent-bright); color: #1b222b; border-radius: 999px; padding: 4px 10px; font-size: 12px; font-weight: 700; text-decoration: none; white-space: nowrap; }
.demo-badge:hover { filter: brightness(1.08); }
@media print { body.demo > * { display: none !important; } }

/* Live design add-on (addons/live.js): modifier cards in the properties panel, the script editor. */
.live-mod { border: 1px solid var(--line); border-radius: 8px; padding: 6px 8px 8px; margin: 6px 0; background: var(--field); }
.live-head { display: flex; align-items: center; justify-content: space-between; gap: 6px; margin-bottom: 4px; }
.live-head b { flex: 1; min-width: 0; }
.live-head span { flex: none; white-space: nowrap; }
.live-head button { border: 0; background: none; color: var(--muted); cursor: pointer; min-width: 24px; min-height: 24px; border-radius: 4px; font: inherit; }
.live-head button:hover:not(:disabled) { color: var(--text); background: var(--accent-soft); }
.live-head button:disabled { opacity: .35; cursor: default; }
.live-mod .field input[type=text] { font-family: ui-monospace, Menlo, Consolas, monospace; }
.live-err { color: #ff8a80; font-size: 12px; margin: 4px 0 0; }
.live-code { font: 11px/1.35 ui-monospace, Menlo, Consolas, monospace; white-space: pre-wrap; max-height: 4.2em; overflow: hidden; margin: 2px 0 6px; opacity: .8; }
.live-add { width: 100%; margin-top: 4px; }
.live-code-dlg { width: min(760px, 94vw); }
.live-code-dlg textarea { width: 100%; font: 13px/1.45 ui-monospace, Menlo, Consolas, monospace; tab-size: 2; }
.live-code-dlg .live-err { color: #b3261e; }

/* ---- Ribbon: the most used commands as icons, in labelled colour groups (built in main.js) ---- */
.ribbon { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 6px 8px; padding: 5px 10px 7px; background: var(--chrome); border-bottom: 1px solid #10161d; min-width: 0; }
.ribbon[hidden] { display: none; }
.rib-group { display: flex; flex-direction: column; align-items: center; gap: 2px; }
.rib-label { font-size: 10px; font-weight: 700; letter-spacing: .07em; text-transform: uppercase; color: var(--c); line-height: 1.2; }
.rib-btns { display: flex; gap: 1px; padding: 2px; border: 1.5px solid var(--c); border-radius: 9px; background: color-mix(in srgb, var(--c) 7%, transparent); }
.rib-btn { width: 34px; height: 34px; display: grid; place-items: center; padding: 0; border: 0; border-radius: 6px; background: none; color: var(--text); cursor: pointer; transition: background-color 120ms ease-out, transform 120ms ease-out; }
.rib-btn:hover:not(:disabled) { background: color-mix(in srgb, var(--c) 24%, transparent); }
.rib-btn:active:not(:disabled) { transform: scale(.92); }
.rib-btn:disabled { opacity: .32; cursor: default; }
.rib-btn.on { background: color-mix(in srgb, var(--c) 30%, transparent); }
.rib-btn:focus-visible { outline: 2px solid var(--c); outline-offset: 1px; }
.rib-btn .mi { width: 21px; height: 21px; display: grid; place-items: center; }
.rib-btn .mi svg { width: 21px; height: 21px; fill: currentColor; }
.rib-btn .mi.tool-ic svg { fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.rib-btn .mi.tool-ic svg .thin { stroke-width: 1; opacity: .7; }
.rib-btn .mi.tool-ic svg .red { stroke: var(--danger); }
.rib-btn .mi.tool-ic svg .fillc { fill: currentColor; }
/* Pop-up buttons (Draw, Make, Align) open panels like Layerling's: a big panel of tiles in folding
   sections with a pin (Draw, Make), or a small card of outlined rows (Align). Light, like the menus. */
.rib-pop { position: relative; display: flex; }
.rib-btn.rib-more { width: auto; display: flex; gap: 5px; padding: 0 8px 0 6px; font: 600 12px var(--font); }
.rib-btn.rib-more .caret { font-style: normal; font-size: 10px; opacity: .75; }
.rib-pop.open .rib-more { background: color-mix(in srgb, var(--c) 30%, transparent); }
.rib-panel {
  display: none; position: fixed; z-index: 60; background: #fff; color: #1d2733; color-scheme: light;
  --line: #d3d9e1; --muted: #5d6b7b; --accent-soft: #fdebd9; --tile: color-mix(in srgb, var(--c) 70%, #000);
  border: 1px solid var(--line); border-radius: 12px; box-shadow: 0 18px 50px rgba(15, 23, 35, .28);
}
.rib-panel.big { width: min(880px, calc(100vw - 16px)); max-height: calc(100vh - 150px); flex-direction: column; }
.rib-pop.open .rib-panel.big { display: flex; }
.rib-pop.open .rib-panel.card { display: block; }
.rp-head { display: flex; align-items: center; gap: 4px; padding: 10px 10px 10px 16px; border-bottom: 1px solid var(--line); }
.rp-head b { flex: 1; font-size: 16px; }
.rp-head button { width: 34px; height: 34px; display: grid; place-items: center; border: 0; border-radius: 8px; background: none; color: var(--muted); cursor: pointer; transition: background-color 120ms ease-out, color 120ms ease-out; }
.rp-head button svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.rp-head button:hover, .rp-head .rp-pin.on { background: var(--accent-soft); color: #c2570c; }
.rp-body { overflow: auto; padding: 4px 14px 16px; }
.rp-sec-head { display: flex; align-items: center; gap: 8px; width: 100%; min-height: 36px; border: 0; background: none; padding: 8px 2px 6px; font: 700 11px var(--font); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); cursor: pointer; }
.rp-sec-head:hover { color: #1d2733; }
.rp-sec-head .chev { font-style: normal; font-size: 15px; line-height: 1; display: inline-block; transform: rotate(90deg); transition: transform 150ms ease-out; }
.rp-sec.shut .chev { transform: none; }
.rp-sec.shut .rp-grid { display: none; }
.rp-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(196px, 1fr)); gap: 6px; }
.rib-tile { display: flex; align-items: center; gap: 12px; min-height: 54px; padding: 8px 12px; border: 1px solid transparent; border-radius: 10px; background: #f4f5f7; color: inherit; text-align: left; font: 600 13px/1.25 var(--font); cursor: pointer; transition: background-color 120ms ease-out, border-color 120ms ease-out, transform 120ms ease-out; }
.rib-tile:hover:not(:disabled) { background: var(--accent-soft); border-color: #f3c9a0; }
.rib-tile:active:not(:disabled) { transform: scale(.97); }
.rib-tile:disabled { opacity: .42; cursor: default; }
.rib-tile span { flex: 1; }
.rib-tile kbd { font: 11px var(--font); color: var(--muted); }
.rib-tile .mi, .rp-row .mi { flex: none; display: grid; place-items: center; color: var(--tile); }
.rib-tile .mi { width: 34px; height: 34px; border-radius: 9px; background: color-mix(in srgb, var(--c) 16%, #fff); }
.rib-tile .mi svg { width: 24px; height: 24px; fill: currentColor; }
.rp-row .mi, .rp-row .mi svg { width: 20px; height: 20px; }
.rp-row .mi svg { fill: currentColor; }
.rib-tile .mi.tool-ic svg, .rp-row .mi.tool-ic svg { fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.rib-tile .mi.tool-ic svg .thin, .rp-row .mi.tool-ic svg .thin { stroke-width: 1; opacity: .7; }
.rib-tile .mi.tool-ic svg .red, .rp-row .mi.tool-ic svg .red { stroke: var(--danger); }
.rib-tile .mi.tool-ic svg .fillc, .rp-row .mi.tool-ic svg .fillc { fill: currentColor; }
.rib-panel.card { width: 280px; padding: 8px; }
.rp-rows { display: grid; gap: 6px; }
.rp-row { display: flex; align-items: center; gap: 12px; min-height: 42px; padding: 6px 12px; border: 1px solid var(--line); border-radius: 9px; background: #fafbfc; color: inherit; text-align: left; font: 600 13px var(--font); cursor: pointer; transition: background-color 120ms ease-out, border-color 120ms ease-out; }
.rp-row:hover:not(:disabled) { background: var(--accent-soft); border-color: #f3c9a0; }
.rp-row:disabled { opacity: .45; cursor: default; }
.rp-gap { display: block; height: 2px; }
.rp-hint { margin: 10px 4px 2px; font-size: 12px; color: var(--muted); }
@media (prefers-reduced-motion: reduce) { .rp-sec-head .chev, .rib-tile { transition: none; } }
/* Laptop widths: smaller buttons so the ribbon stays at two rows. */
@media (max-width: 1360px) {
  .ribbon { gap: 4px 6px; padding: 4px 8px 6px; }
  .rib-btn { width: 28px; height: 28px; }
  .rib-btn .mi, .rib-btn .mi svg { width: 18px; height: 18px; }
  .rib-label { font-size: 9px; }
}
/* Narrow screens: one row that scrolls sideways instead of several rows. */
@media (max-width: 900px) { .ribbon { flex-wrap: nowrap; overflow-x: auto; scrollbar-width: thin; } }

/* ---- Top bar: ☰ Menu, then one tab per open drawing (state.js tabs), then the end items ---- */
.main-menu { display: flex; flex: none; }
.main-menu .rib-more { height: 30px; color: var(--text); }
.tabs { flex: 1; min-width: 0; display: flex; align-items: flex-end; align-self: stretch; gap: 2px; overflow-x: auto; scrollbar-width: none; padding-top: 6px; }
.tabs::-webkit-scrollbar { display: none; }
.tab { display: flex; align-items: center; flex: 0 1 200px; min-width: 96px; height: 34px; border-radius: 9px 9px 0 0; background: rgba(255, 255, 255, .04); border: 1px solid transparent; border-bottom: 0; transition: background-color 120ms ease-out; }
.tab:hover { background: rgba(255, 255, 255, .08); }
.tab.on { background: var(--field); border-color: var(--line); box-shadow: inset 0 2px 0 var(--accent-bright); }
.tab-name { flex: 1; min-width: 0; height: 100%; display: flex; align-items: center; gap: 4px; padding: 0 4px 0 12px; border: 0; background: none; color: var(--muted); font: 600 13px var(--font); text-align: left; cursor: pointer; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.tab.on .tab-name { color: #fff; }
.tab-dirty { font-style: normal; color: var(--accent-bright); }
.tab-x { flex: none; width: 26px; height: 26px; margin-right: 4px; border: 0; border-radius: 6px; background: none; color: var(--muted); font-size: 17px; line-height: 1; cursor: pointer; }
.tab-x:hover { background: rgba(255, 255, 255, .12); color: #fff; }
.tab-new { flex: none; width: 32px; height: 32px; margin: 0 0 1px 2px; border: 0; border-radius: 8px; background: none; color: var(--muted); font-size: 20px; cursor: pointer; }
.tab-new:hover { background: rgba(242, 140, 40, .2); color: #fff; }
.tab-name:focus-visible, .tab-x:focus-visible, .tab-new:focus-visible { outline: 2px solid var(--accent-bright); outline-offset: -2px; }
.top-end { display: flex; align-items: center; gap: 8px; flex: none; }
.top-end .demo-badge { margin-left: 0; }
.rib-tile.on { border-color: var(--accent-bright); }
.rib-tile.on span::after { content: " ✓"; color: #c2570c; }

/* Font credits list. */
.credits { max-height: 55vh; overflow: auto; font-size: 13px; }
.credits h3 { margin: 12px 0 4px; font-size: 12px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }
.credits ul { margin: 0; padding-left: 18px; }
.credits li { margin: 4px 0; }
.credits small { color: var(--muted); }

/* Font picker button (panel) and the picker itself: each font previewed in its own lettering. */
.font-pick { display: flex; align-items: center; gap: 8px; width: 100%; min-height: 40px; padding: 4px 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--field); color: var(--text); cursor: pointer; }
.font-pick:hover { border-color: var(--accent-bright); }
.font-pick .fp-svg { height: 22px; max-width: 200px; flex: 1; object-fit: contain; }
.font-pick i { font-style: normal; color: var(--muted); font-size: 11px; }
.fp-svg { display: block; height: 24px; width: auto; max-width: 100%; }
.fp-wait { font-size: 13px; opacity: .55; }
.font-picker { position: fixed; z-index: 70; width: 300px; max-height: min(70vh, 560px); display: flex; flex-direction: column; background: #fff; color: #1d2733; border: 1px solid #d3d9e1; border-radius: 12px; box-shadow: 0 18px 50px rgba(15, 23, 35, .28); color-scheme: light; --muted: #5d6b7b; }
.fp-search { box-sizing: border-box; width: calc(100% - 20px); margin: 10px; padding: 8px 10px; border: 1px solid #d3d9e1; border-radius: 8px; font: 13px var(--font); }
.fp-list { overflow: auto; padding: 0 8px 8px; }
.fp-group { margin: 10px 4px 4px; font: 700 11px var(--font); letter-spacing: .07em; text-transform: uppercase; color: var(--muted); }
.fp-row { display: flex; align-items: center; width: 100%; min-height: 40px; padding: 6px 10px; border: 1px solid transparent; border-radius: 8px; background: none; color: #1d2733; cursor: pointer; }
.fp-row:hover { background: #fdebd9; border-color: #f3c9a0; }
.fp-row.on { border-color: #f28c28; background: #fff6ec; }
.fp-foot { display: flex; justify-content: space-between; gap: 8px; padding: 8px 10px; border-top: 1px solid #d3d9e1; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 8px; }