:root {
  --bg-deep: #0d0d1a;
  --bg-dark: #13132a;
  --bg-panel: #1a1a30;
  --bg-hover: #22223a;
  --bg-active: #2a2a50;
  --border: #2d2d50;
  --border-bright: #4a4a80;
  --text: #e0e0f0;
  --text-muted: #7070a0;
  --accent: #6c63ff;
  --accent-hover: #8a83ff;
  --accent-glow: rgba(108, 99, 255, 0.25);
  --danger: #ff4d6a;
  --danger-hover: #ff7088;
  --success: #2ecc71;
  --warn: #f39c12;
  --toolbar-h: 64px;
}

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

html, body {
  width: 100%; height: 100%;
  overflow: hidden;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg-deep);
  color: var(--text);
  font-size: 13px;
}

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

/* ─── Toolbar ─── */
#toolbar {
  display: flex;
  align-items: center;
  gap: 4px;
  height: var(--toolbar-h);
  padding: 0 12px;
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  overflow-x: auto;
  overflow-y: hidden;
}

.toolbar-brand {
  font-size: 16px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.5px;
  padding-right: 16px;
  white-space: nowrap;
  text-shadow: 0 0 20px var(--accent-glow);
}

.toolbar-section {
  display: flex;
  align-items: center;
  gap: 3px;
  padding: 0 4px;
}

.toolbar-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-muted);
  padding: 0 6px;
  white-space: nowrap;
}

.toolbar-divider {
  width: 1px;
  height: 36px;
  background: var(--border);
  margin: 0 4px;
  flex-shrink: 0;
}

.tool-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 6px 10px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 8px;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.15s ease;
  font-size: 10px;
  white-space: nowrap;
  min-width: 52px;
}

.tool-btn svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.tool-btn:hover {
  background: var(--bg-hover);
  border-color: var(--border);
  color: var(--text);
}

.tool-btn.active {
  background: var(--bg-active);
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
}

.tool-btn.toggle.active {
  color: var(--success);
  border-color: var(--success);
  box-shadow: 0 0 10px rgba(46, 204, 113, 0.2);
}

.tool-btn.danger {
  color: var(--text-muted);
}
.tool-btn.danger:hover {
  color: var(--danger);
  border-color: var(--danger);
  background: rgba(255, 77, 106, 0.1);
}

/* ─── Main area ─── */
#main {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* ─── Viewport ─── */
#viewport {
  flex: 1;
  position: relative;
  overflow: hidden;
  background: var(--bg-deep);
}

#canvas {
  display: block;
  width: 100%;
  height: 100%;
}

#hint {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  padding: 6px 14px;
  background: rgba(13, 13, 26, 0.8);
  border: 1px solid var(--border);
  border-radius: 20px;
  color: var(--text-muted);
  font-size: 11px;
  pointer-events: none;
  backdrop-filter: blur(8px);
  white-space: nowrap;
}

#selection-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  padding: 6px 14px;
  background: rgba(108, 99, 255, 0.15);
  border: 1px solid var(--accent);
  border-radius: 8px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  pointer-events: none;
  backdrop-filter: blur(8px);
  transition: opacity 0.2s;
}

#selection-badge.hidden {
  opacity: 0;
}

/* ─── Sidebar ─── */
#sidebar {
  width: 220px;
  display: flex;
  flex-direction: column;
  background: var(--bg-panel);
  border-left: 1px solid var(--border);
  flex-shrink: 0;
  overflow: hidden;
}

#scene-panel {
  padding: 12px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

#scene-panel h3,
#properties-panel h3 {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-muted);
  margin-bottom: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

#obj-count {
  font-size: 10px;
  font-weight: 400;
  color: var(--text-muted);
  text-transform: none;
  letter-spacing: 0;
}

#object-list {
  max-height: 180px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

#object-list::-webkit-scrollbar { width: 4px; }
#object-list::-webkit-scrollbar-track { background: transparent; }
#object-list::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.object-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border-radius: 6px;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 12px;
  transition: all 0.1s;
  border: 1px solid transparent;
}

.object-item:hover {
  background: var(--bg-hover);
  color: var(--text);
}

.object-item.selected {
  background: var(--bg-active);
  border-color: var(--accent);
  color: var(--accent);
}

.object-item-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* ─── Properties Panel ─── */
#properties-panel {
  flex: 1;
  padding: 12px;
  overflow-y: auto;
}

#properties-panel::-webkit-scrollbar { width: 4px; }
#properties-panel::-webkit-scrollbar-track { background: transparent; }
#properties-panel::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.no-select {
  color: var(--text-muted);
  font-size: 12px;
  text-align: center;
  padding: 20px 0;
  line-height: 1.6;
}

.prop-group {
  margin-bottom: 14px;
}

.prop-group > label {
  display: block;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.7px;
  color: var(--text-muted);
  margin-bottom: 5px;
}

.prop-value {
  font-size: 12px;
  color: var(--text);
  font-weight: 500;
}

.vec3 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 4px;
}

.vec3-item {
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 4px 6px;
  font-size: 11px;
  color: var(--text);
  text-align: center;
}

.vec3-item span {
  display: block;
  font-size: 9px;
  color: var(--text-muted);
  margin-bottom: 1px;
}

.color-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.color-row input[type="color"] {
  width: 36px;
  height: 28px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-dark);
  cursor: pointer;
  padding: 2px;
}

.color-row input[type="color"]::-webkit-color-swatch-wrapper { padding: 0; }
.color-row input[type="color"]::-webkit-color-swatch { border: none; border-radius: 4px; }

.prop-divider {
  height: 1px;
  background: var(--border);
  margin: 12px 0;
}