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

:root {
  --bg-dark: #0a1628;
  --bg-panel: rgba(10, 22, 40, 0.94);
  --accent-blue: #00a2ff;
  --accent-green: #00e676;
  --accent-teal: #00bcd4;
  --accent-orange: #C4722A;
  --text-main: #e8f0ff;
  --text-dim: #7a8fa8;
  --border-color: rgba(0, 162, 255, 0.2);
  --card-bg: rgba(20, 40, 70, 0.7);
  --btn-hover: rgba(0, 162, 255, 0.15);
}

html, body {
  height: 100%;
  overflow: hidden;
  background: var(--bg-dark);
  font-family: 'Fredoka', sans-serif;
  color: var(--text-main);
}

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

#header {
  background: linear-gradient(135deg, #0a1628 0%, #0d2847 50%, #0a2a3f 100%);
  padding: 12px 20px;
  text-align: center;
  border-bottom: 2px solid var(--border-color);
  flex-shrink: 0;
  position: relative;
  z-index: 10;
}

#header h1 {
  font-size: 1.6rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 0.5px;
}

#header .subtitle {
  font-size: 0.82rem;
  color: var(--text-dim);
  font-weight: 400;
  margin-top: 2px;
}

#main-layout {
  display: flex;
  flex: 1;
  overflow: hidden;
  position: relative;
}

#scene-container {
  flex: 1;
  position: relative;
  min-height: 0;
  background: radial-gradient(ellipse at 50% 60%, #132848 0%, #0a1628 100%);
}

#scene-container canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
}

#username-overlay {
  position: absolute;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent-green);
  background: rgba(0, 0, 0, 0.5);
  padding: 4px 14px;
  border-radius: 20px;
  border: 1px solid rgba(0, 230, 118, 0.3);
  pointer-events: none;
  white-space: nowrap;
  z-index: 5;
}

#panel {
  width: 310px;
  flex-shrink: 0;
  background: var(--bg-panel);
  border-left: 2px solid var(--border-color);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

#panel-scroll {
  overflow-y: auto;
  overflow-x: hidden;
  flex: 1;
  padding: 12px;
  scrollbar-width: thin;
  scrollbar-color: var(--accent-blue) transparent;
}

#panel-scroll::-webkit-scrollbar {
  width: 5px;
}

#panel-scroll::-webkit-scrollbar-track {
  background: transparent;
}

#panel-scroll::-webkit-scrollbar-thumb {
  background: var(--accent-blue);
  border-radius: 3px;
}

.panel-section {
  margin-bottom: 16px;
}

.panel-section h3 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-teal);
  margin-bottom: 8px;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--border-color);
}

/* Presets */
.preset-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5px;
}

.preset-btn {
  background: var(--card-bg);
  border: 2px solid transparent;
  border-radius: 8px;
  padding: 8px 6px;
  color: var(--text-main);
  font-family: 'Fredoka', sans-serif;
  font-size: 0.76rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  text-align: center;
}

.preset-btn:hover {
  border-color: var(--accent-blue);
  background: var(--btn-hover);
  transform: translateY(-1px);
}

/* Color pickers */
.color-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5px;
}

.color-item {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--card-bg);
  border-radius: 8px;
  padding: 6px 10px;
}

.color-item label {
  font-size: 0.73rem;
  color: var(--text-dim);
  flex: 1;
  font-weight: 500;
}

.color-item input[type="color"] {
  -webkit-appearance: none;
  border: 2px solid var(--border-color);
  border-radius: 6px;
  width: 32px;
  height: 26px;
  cursor: pointer;
  background: none;
  padding: 0;
}

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

.color-item input[type="color"]::-webkit-color-swatch {
  border: none;
  border-radius: 3px;
}

/* Face grid */
.face-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 5px;
}

.face-btn {
  background: var(--card-bg);
  border: 2px solid transparent;
  border-radius: 8px;
  padding: 5px;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.face-btn canvas {
  border-radius: 4px;
}

.face-btn span {
  font-size: 0.58rem;
  color: var(--text-dim);
  font-family: 'JetBrains Mono', monospace;
}

.face-btn:hover {
  border-color: var(--accent-blue);
  background: var(--btn-hover);
}

.face-btn.active {
  border-color: var(--accent-green);
  background: rgba(0, 230, 118, 0.12);
}

/* Hair toggle */
.hair-toggle-container {
  padding: 4px 0;
}

.hair-toggle-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--card-bg);
  border-radius: 10px;
  padding: 10px 14px;
}

.hair-label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-main);
  flex: 1;
}

.toggle-switch {
  cursor: pointer;
  user-select: none;
}

.toggle-track {
  width: 48px;
  height: 26px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 13px;
  position: relative;
  transition: background 0.3s;
  border: 2px solid rgba(255, 255, 255, 0.15);
}

.toggle-switch.on .toggle-track {
  background: linear-gradient(135deg, var(--accent-orange), #D2801E);
  border-color: var(--accent-orange);
}

.toggle-thumb {
  width: 20px;
  height: 20px;
  background: #fff;
  border-radius: 50%;
  position: absolute;
  top: 1px;
  left: 1px;
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
}

.toggle-switch.on .toggle-thumb {
  transform: translateX(22px);
}

.toggle-status {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-dim);
  min-width: 26px;
}

.toggle-switch.on + .toggle-status {
  color: var(--accent-orange);
}

/* Pose */
.pose-grid {
  display: flex;
  gap: 6px;
}

.pose-btn {
  flex: 1;
  background: var(--card-bg);
  border: 2px solid transparent;
  border-radius: 8px;
  padding: 8px;
  color: var(--text-main);
  font-family: 'Fredoka', sans-serif;
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  text-align: center;
}

.pose-btn:hover {
  border-color: var(--accent-blue);
  background: var(--btn-hover);
}

.pose-btn.active {
  border-color: var(--accent-green);
  background: rgba(0, 230, 118, 0.12);
}

/* Action buttons */
.action-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}

.action-btn {
  background: linear-gradient(135deg, rgba(0, 162, 255, 0.18), rgba(0, 188, 212, 0.12));
  border: 2px solid var(--accent-blue);
  border-radius: 10px;
  padding: 10px 8px;
  color: var(--text-main);
  font-family: 'Fredoka', sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s;
  text-align: center;
}

.action-btn:hover {
  background: linear-gradient(135deg, rgba(0, 162, 255, 0.35), rgba(0, 188, 212, 0.3));
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0, 162, 255, 0.3);
}

.action-btn:active {
  transform: translateY(0);
}

/* Sparkle overlay */
.sparkle-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 4;
  overflow: hidden;
}

.sparkle {
  position: absolute;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-green);
  animation: sparkle-fly 1s ease-out forwards;
  box-shadow: 0 0 10px currentColor;
}

@keyframes sparkle-fly {
  0% {
    opacity: 1;
    transform: scale(1) translateY(0) rotate(0deg);
  }
  50% {
    opacity: 0.8;
    transform: scale(1.3) translateY(-30px) rotate(180deg);
  }
  100% {
    opacity: 0;
    transform: scale(0.1) translateY(-70px) rotate(360deg);
  }
}

footer {
  text-align: center;
  padding: 8px;
  background: rgba(10, 22, 40, 0.95);
  border-top: 1px solid var(--border-color);
  flex-shrink: 0;
  font-size: 0.72rem;
  color: var(--text-dim);
}

footer a {
  color: var(--accent-blue);
  text-decoration: none;
  font-weight: 600;
  margin-left: 12px;
}

footer a:hover {
  text-decoration: underline;
}

/* Mobile */
@media (max-width: 768px) {
  #main-layout {
    flex-direction: column;
  }

  #scene-container {
    height: 42vh;
    flex: none;
  }

  #panel {
    width: 100%;
    flex: 1;
    border-left: none;
    border-top: 2px solid var(--border-color);
  }

  #header h1 {
    font-size: 1.3rem;
  }

  #header .subtitle {
    font-size: 0.75rem;
  }

  .color-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }

  .preset-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }

  .face-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (max-width: 400px) {
  .color-grid {
    grid-template-columns: 1fr 1fr;
  }

  .preset-grid {
    grid-template-columns: 1fr 1fr;
  }
}