/* The page shell: design tokens, reset, layout, and the toolbar.
   Part 1 of 6 under roomcad/web/styles/. index.html loads them in
   this order, and that order IS the cascade order — do not reorder the links. */
[hidden] {
  display: none !important;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  /* Breathing space between the side panels and the edge of the screen.
     Set in mm because that is the measure that was asked for; the JS that
     budgets panel widths measures this value rather than assuming a pixel
     count, so the two can never drift apart. */
  --edge-gap: 5mm;
  --bg: #101012;
  --panel: #1b1b1f;
  --panel-2: #232327;
  --line: #2c2c31;
  --text: #e9e9ee;
  --muted: #9a9aa2;
  --accent: #3d8bfd;
  --accent-soft: rgba(61, 139, 253, 0.16);
  --danger: #ff6b5e;
  --sidebar-width: 200px;
  --inspector-width: 260px;
}

html, body {
  height: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 13px;
  color: var(--text);
  background: var(--bg);
  overflow: hidden;
}

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

/* ── Toolbar ─────────────────────────────────────────── */

#toolbar {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 8px 12px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  flex-wrap: wrap;
}

.toolbar-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

.segmented {
  display: inline-flex;
  background: var(--panel-2);
  border-radius: 8px;
  padding: 2px;
}

.segmented .seg,
.segmented button {
  border: none;
  background: transparent;
  padding: 5px 12px;
  border-radius: 6px;
  font-size: 12px;
  color: var(--muted);
  cursor: pointer;
  white-space: nowrap;
}

.segmented .seg.active,
.segmented button.active {
  background: var(--panel);
  color: var(--text);
  font-weight: 600;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
}

/* The chosen grid reads at a glance: a light grey chip, not just bolder text. */
#grid-picker button.active {
  background: #d4d6da;
  color: #16181d;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.45);
}

/* A non-actionable caption inside the right-click menu (e.g. a size readout). */
.ctx-note {
  padding: 5px 12px 7px;
  font-size: 11px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

#toolbar button.tool,
#toolbar button.primary,
#toolbar button {
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 7px;
  padding: 5px 10px;
  font-size: 12px;
  cursor: pointer;
  color: var(--text);
}

#toolbar button:hover {
  background: var(--accent-soft);
}

#toolbar button.tool.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}

/* Save feedback: orange while saving, neon green once verified. */
#save-room.saving {
  background: #f5a623;
  border-color: #f5a623;
  color: #1a1206;
  font-weight: 600;
}

#save-room.saved {
  background: #39ff14;
  border-color: #39ff14;
  color: #0a0a0a;
  font-weight: 600;
}

/* Live collaboration: a calm neon invitation, then an explicit exit. */
#live-room {
  border-color: rgba(57, 255, 20, 0.55);
  color: #b7ffad;
}

#live-room:hover {
  background: rgba(57, 255, 20, 0.14);
}

#live-room.live-on {
  background: #39ff14;
  border-color: #39ff14;
  color: #0a0a0a;
  font-weight: 700;
  box-shadow: 0 0 12px rgba(57, 255, 20, 0.65);
}

#live-room.join-live {
  animation: roomcad-live-pulse 1.7s ease-in-out infinite;
  background: rgba(57, 255, 20, 0.12);
  border-color: #39ff14;
  color: #d9ffd2;
  font-weight: 700;
}

@keyframes roomcad-live-pulse {
  0%, 100% { box-shadow: 0 0 5px rgba(57, 255, 20, 0.3); }
  50% { box-shadow: 0 0 19px rgba(57, 255, 20, 0.95); }
}

#toolbar #leave-live-room.live-leave {
  background: #c93a3a;
  border-color: #e85a5a;
  color: #fff;
  font-weight: 700;
}

#toolbar #leave-live-room.live-leave:hover {
  background: #e34b4b;
}

#toolbar button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}

#toolbar button:disabled {
  opacity: 0.4;
  cursor: default;
}

#toolbar #undo,
#toolbar #redo {
  padding: 5px 9px;
}

/* Undo/redo SVG icons. */
#toolbar #undo .icon-svg,
#toolbar #redo .icon-svg {
  width: 22px;
  height: 22px;
  display: block;
}

.divider {
  width: 1px;
  height: 22px;
  background: var(--line);
  margin: 0 2px;
}

/* ── Main ────────────────────────────────────────────── */

#main {
  display: flex;
  flex: 1;
  min-height: 0;
}

#sidebar {
  width: var(--sidebar-width);
  min-width: 0;
  flex: 0 0 var(--sidebar-width);
  margin-left: var(--edge-gap);
  background: var(--panel);
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  padding: 12px 10px;
  gap: 8px;
  overflow-y: auto;
}

#sidebar h3 {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  padding: 0 6px;
}

#rooms-list {
  list-style: none;
  flex: 1;
  min-height: 60px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

#rooms-list button {
  width: 100%;
  text-align: left;
  border: 1px solid transparent;
  background: transparent;
  border-radius: 8px;
  padding: 8px 10px;
  cursor: pointer;
  color: var(--text);
}

#rooms-list button:hover {
  background: var(--accent-soft);
}

#rooms-list .room-name {
  font-weight: 600;
  font-size: 13px;
}

#rooms-list .room-meta {
  font-size: 11px;
  color: var(--muted);
}

#rooms-list li {
  position: relative;
}