:root {
  --bg: #eef0f3;
  --panel: rgba(255, 255, 255, 0.94);
  --ink: #111827;
  --ink-2: #4b5563;
  --line: #d1d5db;
  --accent: #1565c0;
  --accent-ink: #0d47a1;
  --warn-bg: #fff4e5;
  --warn-ink: #7c3e00;
  --radius: 10px;
  --font: 'Rubik', system-ui, -apple-system, 'Segoe UI', Arial, sans-serif;
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}
#scene { position: fixed; inset: 0; }
#scene canvas { display: block; outline: none; }
#labels { position: fixed; inset: 0; pointer-events: none; direction: ltr; }

/* 3D labels (CSS2D). left/top are pinned so the RTL page never shifts the absolute anchor. */
.lbl {
  position: absolute; left: 0; top: 0;
  font-family: var(--font);
  font-size: 13px;
  font-weight: 500;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 2px 8px;
  white-space: nowrap;
  direction: rtl;
  unicode-bidi: plaintext;
  box-shadow: 0 1px 2px rgba(0,0,0,0.06);
}
.lbl.dim { font-variant-numeric: tabular-nums; }
.lbl.side { color: var(--accent-ink); border-color: var(--accent); font-weight: 600; }
.lbl.wall { color: #374151; }
.walls-grid { display: grid; grid-template-columns: 1fr; margin-bottom: 8px; }
.lbl.area { color: var(--ink-2); background: rgba(255,255,255,0.75); }
.lbl.ctx { font-size: 11.5px; font-weight: 400; color: var(--ink-2); background: rgba(255,255,255,0.8); border-style: dashed; }
.lbl.ctx.strong { color: #9a3412; border-color: #f97316; font-weight: 600; }
.lbl.ctx.flow { color: #9a3412; background: rgba(255,247,237,0.9); border-color: #fdba74; }

/* Panel */
.panel {
  z-index: 10;
  position: fixed;
  top: 14px;
  right: 14px;
  width: 300px;
  max-width: calc(100vw - 28px);
  max-height: calc(100vh - 28px);
  overflow: auto;
  background: var(--panel);
  backdrop-filter: blur(8px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 6px 24px rgba(17, 24, 39, 0.10);
  font-size: 13px;
  line-height: 1.45;
}
.panel-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
}
.panel.collapsed { width: auto; }
.panel.collapsed .panel-head { border-bottom: none; gap: 14px; }
.panel-title { display: flex; align-items: center; gap: 8px; font-weight: 600; font-size: 14px; }
.badge {
  display: inline-block; padding: 1px 7px; border-radius: 5px;
  background: var(--accent); color: #fff; font-size: 12px; font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.icon-btn {
  width: 28px; height: 28px; border: 1px solid var(--line); background: #fff;
  border-radius: 6px; cursor: pointer; display: grid; place-items: center;
}
.icon-btn:hover { border-color: var(--accent); }
.chev { width: 8px; height: 8px; border-right: 2px solid var(--ink-2); border-bottom: 2px solid var(--ink-2); transform: rotate(45deg); margin-top: -3px; transition: transform .15s; }
.panel.collapsed .chev { transform: rotate(-135deg); margin-top: 3px; }
.panel-body { padding: 10px 12px 12px; }
.panel.collapsed .panel-body { display: none; }

.note {
  margin: 0 0 10px; padding: 8px 10px;
  background: #f3f6fb; border: 1px solid #dbe4f0; border-radius: 8px;
  color: var(--ink-2); font-size: 12px;
}
.sec { padding: 10px 0; border-top: 1px solid var(--line); }
.sec-title { margin: 0 0 8px; font-size: 12px; font-weight: 600; color: var(--ink-2); letter-spacing: .01em; }
.fields { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 8px; }
.field { display: flex; flex-direction: column; gap: 4px; }
.field-label { color: var(--ink-2); font-size: 12px; }
.field-input { display: flex; align-items: center; gap: 6px; }
.field-input input {
  width: 100%; min-width: 0; padding: 6px 8px; font: inherit; font-size: 14px;
  border: 1px solid var(--line); border-radius: 6px; background: #fff; color: var(--ink);
  direction: ltr; text-align: left; font-variant-numeric: tabular-nums;
}
.field-input input:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent); }
.unit { color: var(--ink-2); font-size: 12px; }
.row { display: flex; justify-content: space-between; align-items: baseline; padding: 3px 0; }
.row-label { color: var(--ink-2); }
.row-value { font-weight: 600; font-variant-numeric: tabular-nums; }
.warn {
  margin: 8px 0 0; padding: 7px 10px; border-radius: 8px;
  background: var(--warn-bg); color: var(--warn-ink); border: 1px solid #f5d0a0; font-size: 12px; font-weight: 500;
}
.btn {
  display: block; width: 100%; margin-top: 8px; padding: 7px 10px;
  font: inherit; font-weight: 500; font-size: 13px;
  border-radius: 7px; border: 1px solid var(--accent); background: var(--accent); color: #fff; cursor: pointer;
}
.btn:hover { background: var(--accent-ink); }
.btn.secondary { background: #fff; color: var(--accent-ink); }
.btn.secondary:hover { background: #f3f6fb; }
.seg { display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--line); border-radius: 7px; overflow: hidden; }
.seg-btn {
  padding: 7px 4px; font: inherit; font-size: 12.5px; border: none; background: #fff; color: var(--ink); cursor: pointer;
  border-inline-start: 1px solid var(--line);
}
.seg-btn:first-child { border-inline-start: none; }
.seg-btn[aria-pressed="true"] { background: var(--accent); color: #fff; font-weight: 600; }
.seg-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }
.hint { margin: 8px 0 0; color: var(--ink-2); font-size: 12px; }
.check { display: flex; align-items: center; gap: 8px; padding: 4px 0; cursor: pointer; }
.check input { width: 16px; height: 16px; accent-color: var(--accent); margin: 0; }
.foot { margin: 8px 0 0; padding-top: 8px; border-top: 1px solid var(--line); color: var(--ink-2); font-size: 11px; }
.hidden { display: none !important; }

/* Walk overlay */
.overlay {
  position: fixed; inset: 0; display: grid; place-items: center;
  background: rgba(17, 24, 39, 0.16); cursor: pointer; z-index: 5;
}
.overlay-card {
  background: #fff; border-radius: 12px; padding: 18px 22px; max-width: 340px; text-align: center;
  box-shadow: 0 10px 30px rgba(0,0,0,.2);
}
.overlay-title { font-weight: 600; font-size: 16px; margin-bottom: 6px; }
.overlay-text { color: var(--ink-2); font-size: 13px; }

@media (max-width: 600px) {
  .panel { top: 10px; right: 10px; left: 10px; width: auto; }
}

/* Components */
.add-row { display: flex; gap: 6px; margin-bottom: 8px; }
.add-row select { flex: 1; min-width: 0; padding: 6px 8px; font: inherit; font-size: 13px; border: 1px solid var(--line); border-radius: 6px; background: #fff; color: var(--ink); }
.btn.small { width: auto; margin-top: 0; padding: 6px 10px; font-size: 12.5px; }
.btn.danger { background: #fff; color: #b91c1c; border-color: #fca5a5; }
.btn.danger:hover { background: #fef2f2; }
.comp-list { list-style: none; margin: 0 0 8px; padding: 0; max-height: 150px; overflow: auto; border: 1px solid var(--line); border-radius: 7px; }
.comp-list:empty { display: none; }
.comp-list li { display: flex; justify-content: space-between; align-items: center; padding: 5px 8px; cursor: pointer; border-bottom: 1px solid var(--line); font-size: 12.5px; }
.comp-list li:last-child { border-bottom: none; }
.comp-list li:hover { background: #f3f6fb; }
.comp-list li[aria-selected="true"] { background: #e3edfb; font-weight: 600; }
.comp-list li .pos { color: var(--ink-2); font-weight: 400; font-variant-numeric: tabular-nums; direction: ltr; }
.comp-edit { padding: 8px; border: 1px solid #c7d7f0; border-radius: 8px; background: #f7faff; display: grid; gap: 6px; }
.fields3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; }
.fields3 .field-input input { padding: 5px 6px; font-size: 13px; }
#ce-name { direction: rtl; text-align: right; }
.btn-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; }
.lbl.comp { font-size: 11px; color: var(--ink-2); background: rgba(255,255,255,0.85); }
.btn-row2 { display: grid; grid-template-columns: 2fr 1fr; gap: 6px; margin-bottom: 8px; }
.seg.mini { display: inline-grid; grid-template-columns: 1fr 1fr; width: 130px; }
.seg.mini .seg-btn { padding: 4px 6px; font-size: 12px; }
.save-row { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; margin-bottom: 8px; }
#layouts-row { grid-template-columns: 1fr auto auto; }
#layouts-row select { min-width: 0; padding: 6px 8px; font: inherit; font-size: 13px; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
.btn.small:disabled { opacity: .45; cursor: default; }

.seg.mini.scene { width: 200px; }