:root {
  --bg: #06080f;
  --panel: rgba(255, 255, 255, 0.04);
  --panel-strong: rgba(255, 255, 255, 0.08);
  --border: rgba(255, 255, 255, 0.12);
  --text: #f7fbff;
  --muted: rgba(255, 255, 255, 0.65);
  --accent: #7dd3fc;
  --accent-2: #a78bfa;
  --glass: rgba(125, 211, 252, 0.1);
  --gradient: linear-gradient(135deg, #0f172a 0%, #111827 40%, #1e293b 100%);
  --panel-width: 280px;
  --panel-bg: rgba(15, 23, 42, 0.95);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background: radial-gradient(circle at 20% 20%, rgba(125, 211, 252, 0.07), transparent 30%),
              radial-gradient(circle at 80% 0%, rgba(167, 139, 250, 0.08), transparent 35%),
              var(--gradient);
  color: var(--text);
  overflow: hidden;
}

/* ========== SCENE CONTAINER (Fullscreen) ========== */
#scene-container {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body.panel-open #scene-container {
  right: var(--panel-width);
}

#scene {
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 50% 30%, rgba(125, 211, 252, 0.06), transparent 50%),
              linear-gradient(180deg, rgba(255, 255, 255, 0.03), transparent 40%),
              #0b1221;
}

/* ========== MENU TOGGLE BUTTON ========== */
.menu-toggle {
  position: fixed;
  top: 12px;
  right: 12px;
  z-index: 1000;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--panel-bg);
  backdrop-filter: blur(20px);
  color: var(--text);
  font-size: 18px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  align-items: center;
  justify-content: center;
}

.menu-toggle:hover {
  background: var(--panel-strong);
  border-color: var(--accent);
  transform: scale(1.05);
}

body.panel-open .menu-toggle {
  right: calc(var(--panel-width) + 12px);
}

/* ========== SIDE PANEL ========== */
.panel {
  position: fixed;
  top: 0;
  right: 0;
  width: var(--panel-width);
  height: 100vh;
  background: var(--panel-bg);
  backdrop-filter: blur(30px);
  border-left: 1px solid var(--border);
  overflow-y: auto;
  overflow-x: hidden;
  z-index: 900;
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  padding-bottom: 60px;
}

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

/* Panel Header - More compact */
.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--panel-bg);
  backdrop-filter: blur(30px);
  z-index: 10;
}

.panel-header h2 {
  margin: 0;
  font-size: 1.2rem;
  font-weight: 700;
}

.panel-header .eyebrow {
  margin-bottom: 2px;
  font-size: 0.6rem;
}

.btn-close {
  width: 28px;
  height: 28px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-close:hover {
  background: var(--panel-strong);
  color: var(--text);
  border-color: var(--accent);
}

/* Stats Bar - Compact */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
}

.stat {
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 6px 8px;
  border-radius: 8px;
  text-align: center;
}

.stat p { margin: 0; color: var(--muted); font-size: 0.6rem; text-transform: uppercase; letter-spacing: 0.03em; }
.stat strong { font-size: 0.75rem; display: block; margin-top: 2px; }

/* Panel Sections - Compact */
.panel-section {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
}

.panel-section h3 {
  margin: 0 0 6px;
  font-size: 0.85rem;
}

/* Collapsible Sections */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  padding: 2px 0;
  user-select: none;
}

.section-header .eyebrow {
  margin: 0;
}

.section-toggle {
  font-size: 10px;
  color: var(--muted);
  transition: transform 0.2s ease;
}

.panel-section.collapsed .section-toggle {
  transform: rotate(-90deg);
}

.panel-section.collapsed .section-content {
  display: none;
}

.section-content {
  margin-top: 8px;
}

/* Button Row - Compact */
.button-row {
  display: flex;
  gap: 6px;
}

.button-row .btn {
  flex: 1;
  padding: 8px 10px;
  font-size: 0.75rem;
}

/* ========== COMMON ELEMENTS ========== */
.eyebrow {
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 600;
  font-size: 0.6rem;
  color: var(--muted);
  margin: 0 0 4px;
}

.label-small {
  font-size: 0.65rem;
  color: var(--muted);
  margin: 0 0 4px;
  font-weight: 500;
}

.muted { color: var(--muted); margin: 0 0 6px; line-height: 1.4; font-size: 0.7rem; }

.btn {
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  padding: 7px 10px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.7rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn:hover {
  background: var(--panel-strong);
  border-color: rgba(125, 211, 252, 0.4);
}

.btn--accent {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #0b1221;
  border-color: transparent;
}

.btn--accent:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(125, 211, 252, 0.3);
}

.btn--full {
  width: 100%;
}

.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ========== PILL BUTTONS ========== */
.pill-row {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.pill-row--wrap {
  flex-wrap: wrap;
}

.pill {
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  padding: 5px 8px;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 500;
  font-size: 0.68rem;
  transition: all 0.15s ease;
}

.pill:hover {
  background: var(--glass);
  border-color: rgba(125, 211, 252, 0.4);
}

.pill--active {
  background: var(--glass);
  border-color: var(--accent);
  color: var(--accent);
}

/* ========== COLOR CUSTOM ========== */
.color-custom {
  display: flex;
  gap: 6px;
  margin-bottom: 10px;
  flex-wrap: wrap;
  justify-content: space-between;
}

.color-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  font-size: 0.65rem;
  color: var(--muted);
}

.color-label input[type="color"] {
  width: 36px;
  height: 24px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: transparent;
  cursor: pointer;
  padding: 0;
}

.color-label input[type="color"]::-webkit-color-swatch-wrapper {
  padding: 2px;
}

.color-label input[type="color"]::-webkit-color-swatch {
  border-radius: 2px;
  border: none;
}

/* ========== PHYSICS CONTROLS ========== */
.physics-controls {
  margin-top: 8px;
}

.physics-group {
  margin-bottom: 8px;
  padding: 8px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
}

/* ========== CONTROLS ========== */
.control {
  display: flex;
  flex-direction: column;
  gap: 4px;
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 8px 10px;
  border-radius: 8px;
  font-size: 0.7rem;
  color: var(--muted);
  margin-bottom: 6px;
}

.control:last-child {
  margin-bottom: 0;
}

.control input[type="range"],
.control input[type="color"] {
  width: 100%;
}

.control input[type="range"] {
  height: 4px;
  border-radius: 2px;
  background: var(--panel-strong);
  appearance: none;
  cursor: pointer;
}

.control input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  transition: transform 0.15s ease;
}

.control input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.control input[type="color"] {
  height: 28px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel-strong);
}

.control__value {
  font-weight: 600;
  color: var(--text);
  font-size: 0.68rem;
}

/* ========== CHIP BUTTONS ========== */
.chip-row { display: flex; flex-wrap: wrap; gap: 4px; }

.chip {
  border: 1px solid var(--border);
  background: var(--panel-strong);
  color: var(--text);
  padding: 5px 8px;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 500;
  font-size: 0.68rem;
  transition: all 0.15s ease;
}

.chip:hover { 
  border-color: rgba(125, 211, 252, 0.6); 
  background: var(--glass);
}

/* ========== WEBCAM CONTROLS ========== */
.webcam-controls {
  margin-top: 8px;
  padding: 8px;
  background: var(--panel-strong);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.webcam-controls .pill-row {
  margin-top: 6px;
}

.tracking-status {
  display: flex;
  justify-content: space-between;
  margin-top: 8px;
  font-size: 0.7rem;
  color: var(--muted);
}

.tracking-status span {
  padding: 2px 6px;
  background: var(--panel);
  border-radius: 4px;
  border: 1px solid var(--border);
}

.tracking-status span.active {
  color: var(--accent);
  border-color: var(--accent);
}

/* ========== AUDIO CONTROLS ========== */
.audio-controls {
  margin-top: 8px;
  padding: 8px;
  background: var(--panel-strong);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.audio-levels {
  display: flex;
  gap: 4px;
  margin-top: 6px;
}

.level-bar {
  flex: 1;
  height: 36px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 4px;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.level-bar span {
  position: absolute;
  bottom: 2px;
  left: 0;
  right: 0;
  text-align: center;
  font-size: 0.55rem;
  color: var(--muted);
  z-index: 2;
}

.level-fill {
  width: 100%;
  background: linear-gradient(0deg, var(--accent), var(--accent-2));
  transition: height 0.05s ease-out;
  border-radius: 0 0 3px 3px;
}

#level-low .level-fill { background: linear-gradient(0deg, #ef4444, #f97316); }
#level-mid .level-fill { background: linear-gradient(0deg, #22c55e, #84cc16); }
#level-high .level-fill { background: linear-gradient(0deg, #3b82f6, #8b5cf6); }

/* ========== HOLODECK PRESETS ========== */
#mode-presets .pill {
  background: linear-gradient(135deg, var(--panel), var(--panel-strong));
}

#mode-presets .pill:hover {
  background: linear-gradient(135deg, var(--glass), rgba(167, 139, 250, 0.1));
  border-color: var(--accent-2);
}

[data-mode-preset="neon-sculpture"],
[data-mode-preset="alien-sonar"],
[data-mode-preset="living-clay"],
[data-mode-preset="audio-terrain"] {
  background: linear-gradient(135deg, rgba(125, 211, 252, 0.12), rgba(167, 139, 250, 0.12));
  border-color: rgba(125, 211, 252, 0.25);
}

[data-mode-preset="neon-sculpture"]:hover,
[data-mode-preset="alien-sonar"]:hover,
[data-mode-preset="living-clay"]:hover,
[data-mode-preset="audio-terrain"]:hover {
  background: linear-gradient(135deg, rgba(125, 211, 252, 0.22), rgba(167, 139, 250, 0.22));
  border-color: var(--accent);
}

/* ========== SCROLLBAR ========== */
.panel::-webkit-scrollbar {
  width: 4px;
}

.panel::-webkit-scrollbar-track {
  background: transparent;
}

.panel::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
}

.panel::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* ========== MOBILE RESPONSIVE ========== */
@media (max-width: 768px) {
  :root {
    --panel-width: 100%;
  }
  
  .panel {
    width: 100%;
  }
  
  body.panel-open #scene-container {
    left: 0;
    opacity: 0.2;
    pointer-events: none;
  }
  
  .menu-toggle {
    width: 36px;
    height: 36px;
    font-size: 16px;
  }
  
  body.panel-open .menu-toggle {
    left: auto;
    right: 12px;
  }
}