:root {
  --bg: #f4f5f7;
  --surface: #ffffff;
  --surface-2: #fafbfc;
  --line: #e3e5e9;
  --line-strong: #d0d4da;
  --text: #16181d;
  --muted: #6b7280;
  --accent: #2f7d4f;
  --accent-soft: #e7f3ec;
  --danger: #d4383d;
  --stage: #4c4c50;
  --stage-2: #2b2b2e;
  --grid: #e8eaee;
  --panel-fill: #ffffff;
  --dim: #2f7d4f;
  --shadow: 0 1px 2px rgba(16, 18, 21, .06), 0 8px 24px rgba(16, 18, 21, .06);
  --radius: 10px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181c;
    --surface: #1e2126;
    --surface-2: #23262c;
    --line: #2e323a;
    --line-strong: #3a3f48;
    --text: #e8eaed;
    --muted: #9aa1ad;
    --accent: #4ade80;
    --accent-soft: #1c2f24;
    --danger: #f87171;
    --stage: #4c4c50;
    --stage-2: #2b2b2e;
    --grid: #262a31;
    --panel-fill: #1a1d21;
    --dim: #4ade80;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 24px rgba(0, 0, 0, .35);
  }
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.45 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

#app { display: flex; flex-direction: column; height: 100%; }

/* ---------- top bar ---------- */
.topbar {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 12px;
  padding: 8px 14px;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}

.brand { display: flex; align-items: center; gap: 10px; min-width: 0; }
.logo { color: var(--accent); font-size: 18px; }

.name-input {
  font: 600 15px/1.2 inherit;
  color: var(--text);
  background: transparent;
  border: 1px solid transparent;
  border-radius: 6px;
  padding: 4px 6px;
  max-width: 230px;
}
.name-input:hover { border-color: var(--line); }
.name-input:focus { outline: none; border-color: var(--accent); background: var(--surface-2); }

.status { color: var(--muted); font-size: 12px; white-space: nowrap; }
.status.busy { color: var(--accent); }

.viewtoggle {
  display: inline-flex;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 3px;
}
.vt {
  border: 0; background: transparent; color: var(--muted);
  font: 600 13px/1 inherit; padding: 7px 16px; border-radius: 6px; cursor: pointer;
}
.vt[aria-selected="true"] { background: var(--surface); color: var(--text); box-shadow: var(--shadow); }

.actions { display: flex; align-items: center; gap: 8px; justify-content: flex-end; }

button { font-family: inherit; }

.icon-btn {
  width: 32px; height: 32px; display: grid; place-items: center;
  border: 1px solid var(--line); background: var(--surface);
  color: var(--text); border-radius: 8px; cursor: pointer; font-size: 15px;
}
.icon-btn:hover:not(:disabled) { background: var(--surface-2); border-color: var(--line-strong); }
.icon-btn:disabled { opacity: .35; cursor: default; }

.primary {
  border: 0; background: var(--accent); color: #fff;
  font: 600 13px/1 inherit; padding: 9px 16px; border-radius: 8px; cursor: pointer;
}
@media (prefers-color-scheme: dark) { .primary { color: #0b1410; } }
.primary:hover { filter: brightness(1.06); }

.ghost {
  border: 1px solid var(--line-strong); background: var(--surface); color: var(--text);
  font: 600 13px/1 inherit; padding: 9px 14px; border-radius: 8px; cursor: pointer;
}
.ghost:hover { background: var(--surface-2); }

/* ---------- layout ---------- */
.layout { flex: 1; display: flex; min-height: 0; }

.tools[hidden] { display: none; }
.tools {
  width: 68px; flex: none;
  background: var(--surface); border-right: 1px solid var(--line);
  display: flex; flex-direction: column; align-items: stretch; padding: 8px 6px; gap: 2px;
}
.tool {
  display: flex; flex-direction: column; align-items: center; gap: 3px;
  border: 0; background: transparent; color: var(--muted);
  font: 500 10px/1 inherit; padding: 9px 2px; border-radius: 8px; cursor: pointer;
}
.tool span { font-size: 17px; line-height: 1; }
.tool:hover { background: var(--surface-2); color: var(--text); }
.tool.danger:hover { color: var(--danger); }
.tool-spacer { flex: 1; }

.stage {
  position: relative; flex: 1; min-width: 0;
  background: radial-gradient(125% 105% at 28% 18%, var(--stage) 0%, var(--stage-2) 78%);
}
/* The preview backdrop is the viewer's choice, independent of the UI theme. */
.stage[data-backdrop="light"] {
  --stage: #ffffff;
  --stage-2: #dde1e8;
  --dim-ink: #23272e;
  --dim-halo: rgba(255, 255, 255, .75);
  --dim-soft: rgba(35, 39, 46, .45);
  --board: #e6e9ef;
  --board-2: #ccd2dc;
  --board-line: #3a4048;
}
.stage[data-backdrop="dark"] {
  --dim-ink: #ffffff;
  --dim-halo: rgba(0, 0, 0, .55);
  --dim-soft: rgba(255, 255, 255, .45);
  --board: #7c828c;
  --board-2: #626873;
  --board-line: #eceef2;
}

.backdrop-pick {
  position: absolute; top: 14px; left: 14px; z-index: 5;
  display: flex; gap: 3px; padding: 4px;
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 10px; box-shadow: var(--shadow);
}
.backdrop-pick button {
  width: 26px; height: 26px; padding: 0; cursor: pointer;
  border: 1.5px solid var(--line-strong); border-radius: 7px;
}
.backdrop-pick button:hover { border-color: var(--muted); }
.backdrop-pick button[aria-pressed="true"] {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-soft);
}
.stage-pane { position: absolute; inset: 0; }
.stage-pane[hidden] { display: none; }
#stage2d { background: var(--bg); }
#stage3d canvas { display: block; }

.dim-overlay { position: absolute; inset: 0; pointer-events: none; overflow: visible; }
.dim-line { stroke: var(--dim-ink); stroke-width: 1.1; opacity: .85; }
.dim-ext { stroke: var(--dim-soft); stroke-width: 1; }
.dim-head { fill: var(--dim-ink); opacity: .85; }
.dim-text {
  fill: var(--dim-ink); font: 500 13px/1 ui-sans-serif, system-ui, sans-serif;
  text-anchor: middle; paint-order: stroke;
  stroke: var(--dim-halo); stroke-width: 3px; stroke-linejoin: round;
}

.editor-svg { display: block; touch-action: none; user-select: none; }
.editor-svg .handle { cursor: grab; }
.editor-svg .obj { cursor: move; }

.stage-hint {
  position: absolute; left: 50%; bottom: 96px; transform: translateX(-50%);
  background: rgba(20, 22, 26, .82); color: #fff; font-size: 12px;
  padding: 6px 12px; border-radius: 999px; pointer-events: none;
  opacity: 0; transition: opacity .2s;
}
.stage-hint.show { opacity: 1; }

.lid-btn[hidden] { display: none; }
.lid-btn {
  position: absolute; top: 14px; right: 14px;
  border: 1px solid var(--line); background: var(--surface); color: var(--text);
  font: 600 12px/1 inherit; padding: 8px 12px; border-radius: 8px; cursor: pointer;
}
.lid-btn:hover { background: var(--surface-2); }

.faces {
  position: absolute; left: 50%; bottom: 16px; transform: translateX(-50%);
  display: flex; align-items: stretch; gap: 0; padding: 6px;
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 12px; box-shadow: var(--shadow);
}
.face {
  border: 0; background: transparent; border-radius: 9px;
  font: 500 11px/1.2 inherit; padding: 5px 7px 6px; cursor: pointer;
  display: flex; flex-direction: column; align-items: center; gap: 5px; min-width: 52px;
  transition: background .12s ease;
}
.face-ico {
  position: relative;
  width: 28px; height: 28px; display: grid; place-items: center;
  color: var(--text); opacity: .68;
  transition: opacity .12s ease, color .12s ease;
}
.face-ico svg { display: block; width: 26px; height: 26px; }
.face:hover { background: var(--surface-2); }
.face:hover .face-ico { opacity: 1; }
.face[aria-pressed="true"] { background: var(--accent-soft); }
.face[aria-pressed="true"] .face-ico { color: var(--accent); opacity: 1; }
.face-label { color: var(--muted); }
.face[aria-pressed="true"] .face-label { color: var(--accent); font-weight: 600; }
.face-sep { width: 1px; align-self: stretch; background: var(--line); margin: 4px 6px; }
.face .badge {
  position: absolute; top: -1px; right: -1px;
  background: var(--accent); color: var(--surface); border-radius: 999px;
  font-size: 9px; font-weight: 700; padding: 0 4px; line-height: 13px;
}

/* ---------- inspector ---------- */
.inspector {
  width: 296px; flex: none; overflow-y: auto;
  background: var(--surface); border-left: 1px solid var(--line);
  padding: 12px 14px 40px;
}
.insp-title { font: 600 13px/1 inherit; color: var(--muted); margin: 4px 0 12px; letter-spacing: .02em; }

.group { border: 1px solid var(--line); border-radius: var(--radius); margin-bottom: 10px; overflow: hidden; }
.group > summary {
  list-style: none; cursor: pointer; padding: 11px 12px;
  font: 600 13px/1 inherit; display: flex; justify-content: space-between; align-items: center;
  background: var(--surface-2);
}
.group > summary::-webkit-details-marker { display: none; }
.group > summary::after { content: "⌄"; color: var(--muted); transition: transform .15s; }
.group[open] > summary::after { transform: rotate(180deg); }
.group-body { padding: 12px; display: grid; gap: 12px; }

.field { display: grid; gap: 6px; }
.field > label { font-size: 12px; color: var(--muted); }
.row { display: flex; gap: 8px; align-items: center; }
.row > * { min-width: 0; }

input[type="text"], input[type="number"], select, textarea {
  width: 100%; padding: 7px 9px; font: inherit; font-size: 13px;
  color: var(--text); background: var(--surface);
  border: 1px solid var(--line-strong); border-radius: 7px;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }
textarea { resize: vertical; min-height: 58px; }

input[type="range"] { width: 100%; accent-color: var(--accent); }

.num { display: flex; align-items: center; gap: 6px; }
.num input { text-align: right; }
.num .unit { font-size: 11px; color: var(--muted); }

.seg { display: flex; border: 1px solid var(--line-strong); border-radius: 8px; overflow: hidden; }
.seg button {
  flex: 1; border: 0; background: var(--surface); color: var(--muted);
  font: 500 12px/1 inherit; padding: 8px 4px; cursor: pointer; white-space: nowrap;
}
.seg button + button { border-left: 1px solid var(--line-strong); }
.seg button[aria-pressed="true"] { background: var(--accent-soft); color: var(--accent); font-weight: 600; }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; }
.card {
  border: 1.5px solid var(--line-strong); border-radius: 10px; background: var(--surface);
  padding: 6px 5px 7px; cursor: pointer; text-align: center;
  font: 500 10.5px/1.25 inherit; color: var(--muted);
  min-width: 0;
}
.card .art {
  display: block; border-radius: 7px; background: var(--surface-2);
  padding: 3px 2px; margin-bottom: 7px;
}
.card svg { display: block; width: 100%; height: 46px; }
.card:hover { border-color: var(--muted); }
.card[aria-pressed="true"] { border-color: var(--accent); color: var(--accent); }
.card[aria-pressed="true"] .art { background: var(--accent-soft); }

.swatch { width: 14px; height: 14px; border-radius: 4px; border: 1px solid rgba(0,0,0,.18); flex: none; }

.hint, .muted { color: var(--muted); font-size: 12px; }
.hint { margin: -4px 0 0; }
.warn { color: var(--danger); font-size: 12px; }

.tick-labels { display: flex; justify-content: space-between; font-size: 10px; color: var(--muted); }

.stat { display: flex; justify-content: space-between; font-size: 12px; color: var(--muted); }
.stat b { color: var(--text); font-weight: 600; }

.link { background: none; border: 0; color: var(--accent); font: inherit; font-size: 12px; cursor: pointer; padding: 0; text-decoration: underline; }

/* ---------- popovers ---------- */
.popover {
  position: fixed; z-index: 40; background: var(--surface);
  border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 10px; max-width: 320px;
}
.popover[hidden] { display: none; }
.pop-title { font: 600 13px/1 inherit; margin: 2px 4px 10px; }
.shape-list { display: grid; gap: 2px; min-width: 160px; }
.shape-list button {
  display: flex; align-items: center; gap: 9px; width: 100%;
  border: 0; background: transparent; color: var(--text);
  font: inherit; font-size: 13px; padding: 8px 9px; border-radius: 7px; cursor: pointer; text-align: left;
}
.shape-list button:hover { background: var(--surface-2); }
.emoji-grid { display: grid; grid-template-columns: repeat(8, 1fr); gap: 2px; max-height: 240px; overflow-y: auto; }
.emoji-grid button { border: 0; background: transparent; font-size: 20px; padding: 4px; border-radius: 6px; cursor: pointer; }
.emoji-grid button:hover { background: var(--surface-2); }
.drop {
  border: 1.5px dashed var(--line-strong); border-radius: 9px;
  padding: 22px 16px; text-align: center; color: var(--muted); font-size: 12px;
}
.drop.over { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }

/* ---------- dialogs ---------- */
.dlg { border: 0; border-radius: 14px; padding: 0; background: var(--surface); color: var(--text); box-shadow: var(--shadow); max-width: 480px; width: calc(100% - 32px); }
.dlg::backdrop { background: rgba(10, 12, 15, .5); }
.dlg-body { padding: 20px; display: grid; gap: 14px; }
.dlg h2 { margin: 0; font-size: 17px; }
.dlg-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 4px; }
.check { display: flex; gap: 8px; align-items: center; font-size: 13px; color: var(--muted); }
.layer-key { display: flex; gap: 14px; font-size: 12px; color: var(--muted); }
.layer-key i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin-right: 5px; }
.note { font-size: 12px; color: var(--accent); margin: 0; }
.steps { margin: 0; padding-left: 20px; display: grid; gap: 8px; font-size: 13px; color: var(--muted); }
.steps li { color: var(--text); }
.steps li span { color: var(--muted); }

@media (max-width: 900px) {
  .inspector { width: 250px; }
  .topbar { grid-template-columns: auto 1fr auto; }
  .name-input { max-width: 130px; }
}

/* ---- text engraver ------------------------------------------------------- */
.preview { position: absolute; inset: 0; width: 100%; height: 100%; }
.preview .ink { stroke: #1f2937; }
.stage[data-backdrop="dark"] .preview .ink { stroke: #eef2f7; }
.preview .box { stroke: #9aa3af; stroke-dasharray: 1.5 1.5; fill: none; }
.stage[data-backdrop="dark"] .preview .box { stroke: #6b7280; }

.text-area {
  width: 100%; min-height: 92px; resize: vertical;
  border: 1px solid var(--line-strong); border-radius: 8px;
  padding: 8px 9px; font: 13px/1.45 inherit; color: var(--text);
  background: var(--surface);
}
.text-area:focus { outline: 2px solid var(--accent); outline-offset: -1px; }

.faces-list { display: flex; flex-direction: column; gap: 5px; }
.face-opt {
  display: block; width: 100%; text-align: left; cursor: pointer;
  border: 1.5px solid var(--line-strong); border-radius: 9px;
  background: var(--surface); padding: 5px 8px;
}
.face-opt svg { display: block; width: 100%; height: 22px; }
.face-opt svg path { fill: none; stroke: var(--text); stroke-width: 1.1;
  stroke-linecap: round; stroke-linejoin: round; vector-effect: non-scaling-stroke; }
.face-opt:hover { border-color: var(--muted); }
.face-opt[aria-pressed="true"] { border-color: var(--accent); background: var(--accent-soft); }
.face-opt[aria-pressed="true"] svg path { stroke: var(--accent); }

.dlg-actions .ghost.wide { padding: 0 16px; }

/* ---------- stand maker ---------- */
.preview { position: absolute; inset: 0; width: 100%; height: 100%; }

.cut { stroke: #d4383d; fill: none; }
.engrave { stroke: #2f6fd0; fill: none; }
/* Opaque on purpose. The base has to actually hide the tenons buried in it, or
   the assembled view shows the joint through the wood as a ragged bottom edge. */
.solid {
  fill: var(--board);
  stroke: var(--board-line);
  stroke-linejoin: round;
}
.solid.base { fill: var(--board-2); }
.hidden-line {
  stroke: var(--board-line); fill: none; opacity: .38;
  stroke-dasharray: 2.5 2;
}
.seam { stroke: var(--dim-soft); }
.panel-tag { fill: var(--dim-soft); font-family: ui-sans-serif, system-ui, sans-serif; }

.warnings {
  position: absolute; left: 14px; right: 14px; bottom: 14px; z-index: 4;
  display: flex; flex-direction: column; gap: 6px; pointer-events: none;
}
.warn-box {
  background: var(--surface); color: var(--text);
  border: 1px solid var(--danger); border-left-width: 4px;
  border-radius: 8px; padding: 8px 12px; font-size: 12.5px; line-height: 1.45;
  box-shadow: var(--shadow);
}

.text-line {
  width: 100%; font: 500 14px/1.3 inherit; color: var(--text);
  background: var(--surface-2); border: 1px solid var(--line);
  border-radius: 7px; padding: 8px 9px;
}
.text-line:focus { outline: none; border-color: var(--accent); background: var(--surface); }

.cat-tabs { display: flex; flex-wrap: wrap; gap: 4px; margin-bottom: 8px; }
.cat-tabs button {
  border: 1px solid var(--line); background: var(--surface);
  color: var(--muted); font: 600 12px/1 inherit;
  padding: 6px 10px; border-radius: 999px; cursor: pointer;
}
.cat-tabs button:hover { background: var(--surface-2); color: var(--text); }
.cat-tabs button[aria-pressed="true"] {
  background: var(--accent-soft); border-color: var(--accent); color: var(--accent);
}

.faces-list { display: flex; flex-direction: column; gap: 4px; }
.face-opt {
  display: flex; align-items: center; gap: 8px; min-height: 42px;
  border: 1px solid var(--line); background: var(--surface);
  border-radius: 8px; padding: 6px 10px; cursor: pointer; text-align: left;
}
.face-opt:hover { background: var(--surface-2); }
.face-opt[aria-pressed="true"] {
  border-color: var(--accent); background: var(--accent-soft);
}
.face-opt .thumb { flex: 1; min-width: 0; display: block; }
.face-opt svg { display: block; width: 100%; height: 26px; }
.thumb-line path { fill: none; stroke: var(--text); stroke-width: .7; }
.thumb-fill path { fill: var(--text); stroke: none; fill-rule: nonzero; }
.face-opt[aria-pressed="true"] .thumb-line path { stroke: var(--accent); }
.face-opt[aria-pressed="true"] .thumb-fill path { fill: var(--accent); }

.pill {
  flex: none; font-size: 10px; font-weight: 700; padding: 2px 6px;
  border-radius: 999px; background: var(--surface-2); color: var(--muted);
}
.pill.warn { background: #fdecec; color: var(--danger); }
@media (prefers-color-scheme: dark) { .pill.warn { background: #3a1f21; } }

.stat b.bad { color: var(--danger); }

.midbar { display: flex; justify-content: center; }

.engrave-fill { fill: #14161a; }
.burn { stroke: color-mix(in srgb, var(--dim-ink) 70%, transparent); }
.burn-fill { fill: color-mix(in srgb, var(--dim-ink) 70%, transparent); }

.face-select {
  width: 100%; font: 500 13px/1.3 inherit; color: var(--text);
  background: var(--surface-2); border: 1px solid var(--line);
  border-radius: 7px; padding: 8px 9px;
}
.face-select:focus { outline: none; border-color: var(--accent); }

/* ---- Template Adjuster ---------------------------------------------------
   Everything above this line is 15_Stand Nama's stylesheet, unchanged, so the
   five tools stay one family. Only what this tool adds is below: the two-pane
   comparison, the drop target, and the colours the result pane marks changed
   features in. */

.compare { position: absolute; inset: 0; display: flex; }
.pane { flex: 1 1 0; min-width: 0; display: flex; flex-direction: column; position: relative; }
.pane + .pane { border-left: 1px solid var(--line); }
.pane-head {
  display: flex; align-items: baseline; justify-content: space-between; gap: 8px;
  padding: 8px 12px; font-size: 12px; flex: none;
}
.pane-title { color: var(--muted); font-weight: 600; letter-spacing: .02em; }
.pane-size { color: var(--text); font-variant-numeric: tabular-nums; }
.pane .preview { position: relative; inset: auto; flex: 1; min-height: 0; width: 100%; height: auto; }

.art { fill: none; stroke: #64707e; }
.stage[data-backdrop="dark"] .art { stroke: #aab4c0; }
.art-box { fill: none; stroke: #b6bec9; stroke-dasharray: 2 2; opacity: .7; }
.stage[data-backdrop="dark"] .art-box { stroke: #5b6572; }

/* Orange for what moved, red-dashed for what was left alone on purpose. Not the
   export colours: these are annotations on a preview, and reusing cut-red here
   would read as "this line is a cut". */
.art-changed { fill: none; stroke: #e07a1f; }
.art-unknown { fill: none; stroke: var(--danger); }

.empty-state {
  position: absolute; inset: 0; display: grid; align-content: center; justify-items: center;
  gap: 10px; text-align: center; padding: 24px; pointer-events: none;
}
.empty-state[hidden] { display: none; }
.empty-state h1 { margin: 0; font-size: 20px; }
.empty-state p { margin: 0; max-width: 40ch; color: var(--muted); font-size: 13px; line-height: 1.5; }
.empty-actions { display: flex; gap: 8px; margin-top: 6px; pointer-events: auto; }

.drop-veil {
  position: absolute; inset: 12px; z-index: 5; display: grid; place-items: center;
  border: 2px dashed var(--accent); border-radius: 12px; background: var(--accent-soft);
  color: var(--accent); font-size: 14px; font-weight: 600; pointer-events: none;
}
.drop-veil[hidden] { display: none; }

.tally { color: var(--muted); font-size: 12px; font-variant-numeric: tabular-nums; }
.tally.has-unknown { color: var(--danger); }

.file-row { display: flex; align-items: center; gap: 8px; justify-content: space-between; }
.file-name { font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.ghost.wide { flex: 1; padding: 0 12px; }
.warn-box.danger { border-color: var(--danger); color: var(--danger); }

/* The pointer to Converter File. Quieter than the empty state's own copy: it is
   a signpost for somebody who opened the wrong tool, not a second pitch. */
.sibling-note {
  margin: 4px 0 0;
  max-width: 40ch;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.5;
  pointer-events: auto;
}
.sibling-note a { color: var(--accent); font-weight: 600; }