:root {
  --bg: #f3f2ee;
  --panel: #ffffff;
  --border: #dcd9d0;
  --text: #1f2329;
  --muted: #6b6f76;
  --accent: #2563eb;
  --accent-soft: rgba(37, 99, 235, 0.3);
  --accent-text: #ffffff;
  --danger: #dc2626;
  --btn: #f7f6f2;
  --btn-hover: #ecebe5;

  --plan-bg: #fbfaf7;
  --plan-grid-minor: #eeede7;
  --plan-grid-major: #d8d5ca;
  --plan-axis: #bdb9aa;
  --plan-label: #8a877c;
  --plan-wall: #3b4049;
  --plan-wall-edge: #1f2329;
  --plan-wall-hover: #5b6370;
  --plan-door: #9a6a3a;
  --plan-glass: #cfe8f6;
  --plan-glass-edge: #2b7bb0;
  --plan-pill: rgba(255, 255, 255, 0.92);

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #17191c;
    --panel: #1f2226;
    --border: #33373d;
    --text: #e6e7e9;
    --muted: #9aa0a8;
    --accent: #5b8def;
    --accent-soft: rgba(91, 141, 239, 0.35);
    --btn: #272a2f;
    --btn-hover: #31353b;

    --plan-bg: #1b1d21;
    --plan-grid-minor: #23262b;
    --plan-grid-major: #30343a;
    --plan-axis: #474c54;
    --plan-label: #7d838c;
    --plan-wall: #c9ccd2;
    --plan-wall-edge: #e8eaee;
    --plan-wall-hover: #a8adb6;
    --plan-door: #d39a5f;
    --plan-glass: #24465c;
    --plan-glass-edge: #6cb6e6;
    --plan-pill: rgba(31, 34, 38, 0.92);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

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

body {
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font: 13px/1.4 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  overflow: hidden;
}

/* ------------------------------------------------------------ toolbar */

.toolbar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
  flex: none;
}

.brand {
  font-weight: 700;
  font-size: 14px;
  margin-right: 4px;
  white-space: nowrap;
}

.group {
  display: flex;
  gap: 4px;
  padding-left: 10px;
  border-left: 1px solid var(--border);
}

button {
  font: inherit;
  color: var(--text);
  background: var(--btn);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 9px;
  cursor: pointer;
  white-space: nowrap;
}
button:hover:not(:disabled) { background: var(--btn-hover); }
button:disabled { opacity: 0.45; cursor: default; }
button:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
button.active, button[aria-pressed="true"],
button.active:hover:not(:disabled), button[aria-pressed="true"]:hover:not(:disabled) {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-text);
}
button.danger { color: var(--danger); }
button.danger:hover { background: rgba(220, 38, 38, 0.1); }

kbd {
  font: 10px ui-monospace, monospace;
  opacity: 0.6;
  margin-left: 3px;
}

.segmented { gap: 0; }
.segmented button { border-radius: 0; margin-left: -1px; }
.segmented button:first-child { border-radius: 6px 0 0 6px; margin-left: 0; }
.segmented button:last-child { border-radius: 0 6px 6px 0; }

/* ------------------------------------------------------------ workspace */

.workspace {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) 260px;
  grid-template-rows: minmax(0, 1fr);
}
.workspace[data-view="2d"] { grid-template-columns: minmax(0, 1fr) 260px; }
.workspace[data-view="3d"] { grid-template-columns: minmax(0, 1fr) 260px; }
.workspace[data-view="2d"] .pane-3d,
.workspace[data-view="3d"] .pane-2d { display: none; }

.pane {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  border-right: 1px solid var(--border);
}

.pane-head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 8px 4px 12px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  font-weight: 600;
  flex: none;
}
.pane-hint {
  font-weight: 400;
  color: var(--muted);
  font-size: 12px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.pane-toggle { margin-left: auto; padding: 2px 8px; font-size: 12px; }

.canvas-wrap {
  position: relative;
  flex: 1;
  min-height: 0;
  overflow: hidden;
  background: var(--plan-bg);
}
#plan {
  position: absolute;
  inset: 0;
  display: block;
  touch-action: none;
  outline: none;
}

.status {
  flex: none;
  padding: 4px 12px;
  border-top: 1px solid var(--border);
  background: var(--panel);
  color: var(--muted);
  font-size: 12px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-height: 25px;
}

.view3d {
  position: relative;
  flex: 1;
  min-height: 0;
  overflow: hidden;
  background: #e9edf1;
}
.view3d canvas { display: block; }
.view3d-msg {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  text-align: center;
  color: #5d636b;
}

.ctxmenu {
  position: absolute;
  z-index: 10;
  display: flex;
  flex-direction: column;
  min-width: 150px;
  padding: 4px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.18);
}
.ctxmenu[hidden] { display: none; }
.ctxmenu button {
  border: 0;
  background: transparent;
  text-align: left;
  padding: 6px 10px;
}

/* ------------------------------------------------------------ properties panel */

.props {
  background: var(--panel);
  overflow-y: auto;
  padding: 14px;
}
.props h2 {
  margin: 0 0 12px;
  font-size: 15px;
}
.props .field {
  display: grid;
  grid-template-columns: 1fr 110px;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}
.props label, .props .k { color: var(--muted); }
.props input, .props select {
  font: inherit;
  width: 100%;
  padding: 4px 6px;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 5px;
}
.props input:focus, .props select:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.props .v { text-align: right; font-variant-numeric: tabular-nums; }
.props .actions { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px; }
.props .hint { color: var(--muted); margin: 10px 0 0; }
.props ul.keys { list-style: none; padding: 0; margin: 12px 0 0; color: var(--muted); }
.props ul.keys li { display: flex; justify-content: space-between; gap: 8px; padding: 2px 0; }
.props ul.keys kbd { opacity: 1; color: var(--text); }

/* ------------------------------------------------------------ narrow screens */

@media (max-width: 860px) {
  body { overflow: auto; }
  .workspace,
  .workspace[data-view="2d"],
  .workspace[data-view="3d"] {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: none;
    grid-auto-rows: minmax(320px, 55vh);
  }
  .workspace .props { min-height: 0; height: auto; }
  .pane { border-right: 0; border-bottom: 1px solid var(--border); }
  .pane-hint { display: none; }
}