:root {
  --bg: #0e1117;
  --panel: #151a23;
  --panel-2: #1b2130;
  --line: #262e3d;
  --text: #e6ebf5;
  --muted: #8b96ad;
  --accent: #5aa9e6;
  --accent-2: #4ec9b0;
  --warn: #f9a03f;
  --radius: 9px;
  --panel-width: 288px;
  --topbar-height: 52px;
  color-scheme: dark;
}

* { box-sizing: border-box; }

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

body {
  background: var(--bg);
  color: var(--text);
  font: 14px/1.5 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  overflow: hidden;
  -webkit-text-size-adjust: 100%;
}

.app {
  display: grid;
  grid-template-columns: var(--panel-width) 1fr;
  grid-template-rows: var(--topbar-height) 1fr;
  grid-template-areas: "topbar topbar" "panel stage";
  height: 100dvh;
}

/* --- top bar --- */
.topbar {
  grid-area: topbar;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 14px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}

.topbar h1 {
  font-size: 15px;
  font-weight: 650;
  letter-spacing: 0.01em;
  margin: 0;
  white-space: nowrap;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
}

.wordmark-short { display: none; }

.topbar h1::before {
  content: "";
  display: inline-block;
  width: 10px;
  height: 10px;
  margin-right: 8px;
  border-radius: 50%;
  background: var(--warn);
  vertical-align: baseline;
}

.topbar-actions {
  display: flex;
  gap: 8px;
  margin-left: auto;
  flex: none;
}

.btn {
  appearance: none;
  border: 1px solid var(--line);
  background: var(--panel-2);
  color: var(--text);
  border-radius: var(--radius);
  padding: 7px 13px;
  font: inherit;
  font-size: 13px;
  cursor: pointer;
  white-space: nowrap;
  transition: background 120ms ease, border-color 120ms ease;
}

.btn:hover { background: #222b3b; border-color: #35405a; }
.btn:active { transform: translateY(1px); }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #06121d;
  font-weight: 620;
  min-width: 82px;
}
.btn.primary:hover { background: #6fb6ea; }

.btn.panel-toggle { display: none; }

/* --- side panel --- */
.panel {
  grid-area: panel;
  background: var(--panel);
  border-right: 1px solid var(--line);
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 4px 0 20px;
  scrollbar-width: thin;
}

.group {
  padding: 14px 14px 16px;
  border-bottom: 1px solid var(--line);
}

.group h2 {
  margin: 0 0 10px;
  font-size: 11px;
  font-weight: 650;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--muted);
}

.scene-grid,
.tool-grid {
  display: grid;
  gap: 6px;
}

.scene-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.tool-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.chip {
  appearance: none;
  border: 1px solid var(--line);
  background: var(--panel-2);
  color: var(--text);
  border-radius: 7px;
  padding: 7px 6px;
  font: inherit;
  font-size: 12px;
  cursor: pointer;
  text-align: center;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: background 120ms ease, border-color 120ms ease, color 120ms ease;
}

.chip:hover { background: #222b3b; }
.chip:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.chip[aria-pressed="true"] {
  background: rgba(90, 169, 230, 0.16);
  border-color: var(--accent);
  color: #cfe6fa;
}

.tool-grid .chip {
  display: grid;
  gap: 2px;
  padding: 8px 4px;
  font-size: 11px;
}

.tool-grid .chip .glyph {
  font-size: 15px;
  line-height: 1.1;
}

.hint {
  margin: 10px 0 0;
  font-size: 12px;
  color: var(--muted);
  min-height: 2.6em;
}

.slider {
  display: block;
  margin-bottom: 12px;
}

.slider > span {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 5px;
}

.slider output {
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
  margin: 0;
}

.toggles {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 7px 10px;
}

.toggle {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 12.5px;
  cursor: pointer;
  min-width: 0;
}

.toggle input { accent-color: var(--accent-2); margin: 0; flex: none; }
.toggle span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.keys {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 5px 12px;
  margin: 0;
  font-size: 12px;
}

.keys dt {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  color: var(--accent-2);
  white-space: nowrap;
}

.keys dd { margin: 0; color: var(--muted); }

.panel-footer {
  padding: 14px;
  font-size: 12px;
}

.panel-footer a { color: var(--muted); }
.panel-footer a:hover { color: var(--accent); }

/* --- stage --- */
.stage {
  grid-area: stage;
  position: relative;
  overflow: hidden;
  background: var(--bg);
  min-width: 0;
  min-height: 0;
}

#canvas {
  display: block;
  position: absolute;
  inset: 0;
  touch-action: none;
  cursor: crosshair;
}

.stats {
  position: absolute;
  left: 12px;
  bottom: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  padding: 7px 11px;
  border-radius: var(--radius);
  background: rgba(21, 26, 35, 0.82);
  border: 1px solid var(--line);
  backdrop-filter: blur(6px);
  font-size: 11.5px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  pointer-events: none;
  max-width: calc(100% - 24px);
}

.stats b { color: var(--text); font-weight: 600; }
.stats[hidden] { display: none; }

.paused-badge {
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 5px 14px;
  border-radius: 999px;
  background: rgba(249, 160, 63, 0.16);
  border: 1px solid rgba(249, 160, 63, 0.5);
  color: var(--warn);
  font-size: 12px;
  letter-spacing: 0.04em;
  pointer-events: none;
}

.paused-badge[hidden] { display: none; }

/* --- narrow screens --- */
@media (max-width: 860px) {
  .app {
    grid-template-columns: 1fr;
    grid-template-rows: var(--topbar-height) 1fr;
    grid-template-areas: "topbar" "stage";
  }

  .btn.panel-toggle { display: inline-block; }

  .panel {
    position: fixed;
    top: var(--topbar-height);
    bottom: 0;
    right: 0;
    width: min(320px, 92vw);
    z-index: 20;
    border-left: 1px solid var(--line);
    border-right: 0;
    transform: translateX(101%);
    transition: transform 180ms ease;
    box-shadow: -18px 0 40px rgba(0, 0, 0, 0.45);
  }

  .panel.open { transform: translateX(0); }

  .topbar h1 { font-size: 13.5px; }
  .btn { padding: 7px 10px; }
  .btn.primary { min-width: 70px; }
}

/* Below this the wordmark is what has to give, not the controls. */
@media (max-width: 560px) {
  .wordmark-long { display: none; }
  .wordmark-short { display: inline; }
  .topbar { padding: 0 10px; gap: 8px; }
  .topbar-actions { gap: 6px; }
  .btn { padding: 7px 9px; font-size: 12.5px; }
  .btn.primary { min-width: 62px; }
  .stats { font-size: 10.5px; gap: 3px 9px; padding: 6px 9px; left: 8px; bottom: 8px; }
}

@media (max-width: 400px) {
  .topbar h1 { display: none; }
  .topbar-actions { margin-left: 0; width: 100%; justify-content: space-between; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition-duration: 1ms !important; }
}