/* ===== Coloring Book - 3D Effect Styles ===== */

:root {
  --coloring-primary: #0d9488;
  --coloring-primary-light: #14b8a6;
  --coloring-primary-dark: #0f766e;
  --coloring-bg-start: #f0fdfa;
  --coloring-bg-end: #ccfbf1;
  --coloring-card-bg: #ffffff;
  --coloring-shadow-color: rgba(13, 148, 136, 0.15);
  --coloring-border: #e5e7eb;
  --canvas-frame-color: #fef3c7;
}

.coloring-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 20px;
  background: linear-gradient(135deg, var(--coloring-bg-start) 0%, var(--coloring-bg-end) 50%, #ecfeff 100%);
  min-height: calc(100vh - 70px);
  border-radius: 24px;
  box-shadow:
    0 4px 6px -1px rgba(0, 0, 0, 0.05),
    0 10px 30px -5px rgba(13, 148, 136, 0.1),
    inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

/* ===== Header ===== */
.game-header {
  text-align: center;
  padding: 30px 20px 20px;
  position: relative;
}

.header-icon-wrap {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 80px;
  height: 80px;
  background: linear-gradient(145deg, #ffffff, #f0fdfa);
  border-radius: 50%;
  box-shadow:
    0 8px 25px rgba(13, 148, 136, 0.25),
    0 2px 8px rgba(0, 0, 0, 0.08),
    inset 0 -2px 6px rgba(13, 148, 136, 0.1),
    inset 0 2px 6px rgba(255, 255, 255, 1);
  margin-bottom: 16px;
  animation: iconFloat 3s ease-in-out infinite;
}

@keyframes iconFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

.header-icon {
  font-size: 40px;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.15));
}

.game-title {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--coloring-primary-dark);
  margin: 0 0 8px;
  text-shadow: 0 2px 4px rgba(13, 148, 136, 0.15);
  letter-spacing: -0.02em;
}

.game-subtitle {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 1rem;
  color: #6b7280;
  margin: 0;
  font-weight: 500;
}

/* ===== Section Titles ===== */
.section-title {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--coloring-primary-dark);
  margin: 0 0 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.section-title::before {
  content: '';
  width: 4px;
  height: 18px;
  background: linear-gradient(180deg, var(--coloring-primary), var(--coloring-primary-light));
  border-radius: 2px;
}

/* ===== Pattern Selection ===== */
.pattern-section {
  margin-bottom: 24px;
}

.pattern-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
  gap: 10px;
  padding: 16px;
  background: var(--coloring-card-bg);
  border-radius: 16px;
  box-shadow:
    0 4px 12px rgba(0, 0, 0, 0.06),
    0 1px 3px rgba(13, 148, 136, 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 0.9);
}

.pattern-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 10px 6px;
  background: linear-gradient(145deg, #fafafa, #f5f5f5);
  border: 2px solid transparent;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow:
    0 2px 6px rgba(0, 0, 0, 0.06),
    inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

.pattern-card:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow:
    0 8px 20px rgba(13, 148, 136, 0.18),
    inset 0 1px 0 rgba(255, 255, 255, 1);
  border-color: var(--coloring-primary-light);
}

.pattern-card.active {
  background: linear-gradient(145deg, #f0fdfa, #ccfbf1);
  border-color: var(--coloring-primary);
  box-shadow:
    0 4px 14px rgba(13, 148, 136, 0.3),
    0 0 0 3px rgba(13, 148, 136, 0.12),
    inset 0 1px 0 rgba(255, 255, 255, 0.9);
  transform: translateY(-2px);
}

.pattern-preview {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.pattern-preview canvas {
  max-width: 100%;
  max-height: 100%;
}

.pattern-name {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.72rem;
  font-weight: 600;
  color: #4b5563;
  text-align: center;
  white-space: nowrap;
}

.pattern-card.active .pattern-name {
  color: var(--coloring-primary-dark);
}

/* ===== Canvas Section ===== */
.canvas-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 24px;
}

.canvas-wrapper {
  position: relative;
  perspective: 800px;
}

.canvas-frame {
  position: relative;
  background: linear-gradient(145deg, #fffef5, #fff9e6);
  border-radius: 16px;
  padding: 12px;
  box-shadow:
    0 15px 40px rgba(0, 0, 0, 0.12),
    0 5px 15px rgba(13, 148, 136, 0.08),
    inset 0 2px 0 rgba(255, 255, 255, 0.9),
    inset 0 -2px 4px rgba(0, 0, 0, 0.04);
  transform: rotateX(2deg);
  transform-style: preserve-3d;
  transition: transform 0.4s ease;
  border: 3px solid var(--canvas-frame-color);
}

.canvas-frame:hover {
  transform: rotateX(0deg) translateY(-4px);
  box-shadow:
    0 22px 50px rgba(0, 0, 0, 0.15),
    0 8px 20px rgba(13, 148, 136, 0.12),
    inset 0 2px 0 rgba(255, 255, 255, 1);
}

.canvas-frame canvas {
  display: block;
  border-radius: 8px;
  cursor: crosshair;
  background: #ffffff;
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.06);
}

#main-canvas {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 2;
}

#line-canvas {
  position: relative;
  z-index: 1;
  pointer-events: none;
}

.canvas-shadow {
  position: absolute;
  bottom: -12px;
  left: 10%;
  right: 10%;
  height: 16px;
  background: radial-gradient(ellipse at center, rgba(13, 148, 136, 0.2) 0%, transparent 70%);
  border-radius: 50%;
  filter: blur(6px);
  z-index: -1;
}

/* ===== Toolbar ===== */
.toolbar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 16px;
  flex-wrap: wrap;
}

.tool-group {
  display: flex;
  gap: 8px;
  padding: 8px 12px;
  background: var(--coloring-card-bg);
  border-radius: 14px;
  box-shadow:
    0 3px 10px rgba(0, 0, 0, 0.06),
    inset 0 1px 0 rgba(255, 255, 255, 0.9);
}

.tool-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  color: #6b7280;
  background: linear-gradient(145deg, #f9fafb, #f3f4f6);
  border: 2px solid transparent;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.tool-btn:hover {
  color: var(--coloring-primary);
  background: linear-gradient(145deg, #f0fdfa, #ccfbf1);
  border-color: var(--coloring-primary-light);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(13, 148, 136, 0.2);
}

.tool-btn.active {
  color: #ffffff;
  background: linear-gradient(145deg, var(--coloring-primary), var(--coloring-primary-dark));
  border-color: var(--coloring-primary-dark);
  box-shadow:
    0 4px 14px rgba(13, 148, 136, 0.35),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
}

.tool-btn i {
  font-size: 1rem;
}

.brush-size-group {
  align-items: center;
  gap: 10px !important;
}

.brush-size-group label {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  color: #6b7280;
  white-space: nowrap;
}

.brush-size-group input[type="range"] {
  width: 100px;
  height: 6px;
  -webkit-appearance: none;
  appearance: none;
  background: linear-gradient(90deg, #e5e7eb, var(--coloring-primary-light));
  border-radius: 3px;
  outline: none;
  cursor: pointer;
}

.brush-size-group input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  background: linear-gradient(145deg, var(--coloring-primary), var(--coloring-primary-dark));
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(13, 148, 136, 0.35);
  transition: transform 0.2s;
}

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

#brush-size-value {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--coloring-primary-dark);
  min-width: 32px;
}

/* ===== Palette Section ===== */
.palette-section {
  margin-bottom: 24px;
  padding: 18px;
  background: var(--coloring-card-bg);
  border-radius: 16px;
  box-shadow:
    0 4px 12px rgba(0, 0, 0, 0.06),
    inset 0 1px 0 rgba(255, 255, 255, 0.9);
}

.palette-presets {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: 14px;
}

.color-swatch {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 3px solid transparent;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow:
    0 2px 6px rgba(0, 0, 0, 0.12),
    inset 0 1px 0 rgba(255, 255, 255, 0.3);
  position: relative;
}

.color-swatch:hover {
  transform: scale(1.2) translateY(-3px);
  box-shadow:
    0 6px 16px rgba(0, 0, 0, 0.2),
    0 0 0 3px rgba(255, 255, 255, 0.8);
  z-index: 2;
}

.color-swatch.active {
  transform: scale(1.15);
  border-color: var(--coloring-primary);
  box-shadow:
    0 4px 12px rgba(13, 148, 136, 0.35),
    0 0 0 3px rgba(13, 148, 136, 0.2);
}

.custom-color-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  margin-left: 8px;
  padding-left: 12px;
  border-left: 2px dashed #e5e7eb;
}

.custom-color-label {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.7rem;
  font-weight: 600;
  color: #9ca3af;
}

input[type="color"].custom-color-wrapper > input[type="color"],
#custom-color {
  width: 36px;
  height: 36px;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  padding: 0;
  background: none;
  box-shadow:
    0 2px 6px rgba(0, 0, 0, 0.12),
    inset 0 1px 0 rgba(255, 255, 255, 0.3);
  transition: all 0.25s ease;
}

#custom-color::-webkit-color-swatch-wrapper {
  padding: 2px;
}

#custom-color::-webkit-color-swatch {
  border: none;
  border-radius: 50%;
}

#custom-color:hover {
  transform: scale(1.15);
  box-shadow: 0 4px 12px rgba(13, 148, 136, 0.3);
}

.current-color-display {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-top: 12px;
  border-top: 1px solid #f3f4f6;
}

.current-color-display span {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  color: #6b7280;
}

.current-color-box {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  border: 2px solid #e5e7eb;
  box-shadow:
    0 2px 6px rgba(0, 0, 0, 0.1),
    inset 0 1px 0 rgba(255, 255, 255, 0.4);
  transition: all 0.3s ease;
}

#current-color-code {
  font-family: 'Plus Jakarta Sans', monospace;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--coloring-primary-dark);
  background: #f0fdfa;
  padding: 3px 8px;
  border-radius: 6px;
}

/* ===== Action Buttons ===== */
.actions-section {
  margin-bottom: 20px;
}

.action-buttons {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.action-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.88rem;
  font-weight: 700;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.action-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s;
}

.action-btn:hover::before {
  left: 100%;
}

.action-undo {
  color: #ffffff;
  background: linear-gradient(145deg, #6366f1, #4f46e5);
  box-shadow:
    0 4px 14px rgba(99, 102, 241, 0.35),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.action-undo:hover {
  transform: translateY(-3px);
  box-shadow:
    0 8px 22px rgba(99, 102, 241, 0.45),
    inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.action-clear {
  color: #ffffff;
  background: linear-gradient(145deg, #ef4444, #dc2626);
  box-shadow:
    0 4px 14px rgba(239, 68, 68, 0.35),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.action-clear:hover {
  transform: translateY(-3px);
  box-shadow:
    0 8px 22px rgba(239, 68, 68, 0.45),
    inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.action-save {
  color: #ffffff;
  background: linear-gradient(145deg, var(--coloring-primary), var(--coloring-primary-dark));
  box-shadow:
    0 4px 14px rgba(13, 148, 136, 0.35),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.action-save:hover {
  transform: translateY(-3px);
  box-shadow:
    0 8px 22px rgba(13, 148, 136, 0.45),
    inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.action-btn:active {
  transform: translateY(-1px) scale(0.97);
}

.action-btn i {
  font-size: 1rem;
}

/* ===== Footer ===== */
.game-footer {
  text-align: center;
  padding: 16px;
  margin-top: 8px;
}

.game-footer p {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.85rem;
  color: #9ca3af;
  margin: 0;
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
  .coloring-container {
    padding: 14px;
    border-radius: 18px;
  }

  .game-title {
    font-size: 1.6rem;
  }

  .header-icon-wrap {
    width: 64px;
    height: 64px;
  }

  .header-icon {
    font-size: 32px;
  }

  .pattern-grid {
    grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
    gap: 8px;
    padding: 12px;
  }

  .pattern-card {
    padding: 8px 4px;
  }

  .pattern-preview {
    width: 40px;
    height: 40px;
  }

  .canvas-frame {
    padding: 8px;
    transform: none;
  }

  .canvas-frame canvas {
    max-width: 100%;
    height: auto;
  }

  #main-canvas,
  #line-canvas {
    width: 100% !important;
    max-width: 400px;
    aspect-ratio: 1;
  }

  .toolbar {
    flex-direction: column;
    gap: 10px;
  }

  .tool-group {
    width: 100%;
    justify-content: center;
    flex-wrap: wrap;
  }

  .tool-btn {
    padding: 8px 12px;
    font-size: 0.8rem;
  }

  .action-buttons {
    gap: 8px;
  }

  .action-btn {
    padding: 10px 16px;
    font-size: 0.82rem;
  }

  .palette-presets {
    gap: 6px;
  }

  .color-swatch {
    width: 30px;
    height: 30px;
  }
}

@media (max-width: 480px) {
  .coloring-container {
    padding: 10px;
    min-height: auto;
  }

  .game-header {
    padding: 20px 12px 14px;
  }

  .game-title {
    font-size: 1.35rem;
  }

  .pattern-grid {
    grid-template-columns: repeat(5, 1fr);
    gap: 6px;
    padding: 10px;
  }

  .pattern-name {
    font-size: 0.65rem;
  }

  .section-title {
    font-size: 0.95rem;
  }

  .palette-presets {
    justify-content: center;
  }

  .action-buttons {
    flex-direction: column;
    align-items: stretch;
  }

  .action-btn {
    justify-content: center;
  }
}

/* ===== Animation Utilities ===== */
@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(13, 148, 136, 0.4); }
  50% { box-shadow: 0 0 0 10px rgba(13, 148, 136, 0); }
}

.tool-btn.active {
  animation: pulse-glow 2s ease-in-out infinite;
}

/* ===== Cursor Styles ===== */
.canvas-frame[data-tool="fill"] #main-canvas {
  cursor: crosshair;
}

.canvas-frame[data-tool="brush"] #main-canvas {
  cursor: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24'%3E%3Ccircle cx='12' cy='12' r='6' fill='%230d9488' opacity='0.6'/%3E%3Ccircle cx='12' cy='12' r='2' fill='%230d9488'/%3E%3C/svg%3E") 12 12, crosshair;
}

.canvas-frame[data-tool="eraser"] #main-canvas {
  cursor: cell;
}