/* ============================================
   Animations Showcase Styles
   ============================================ */

.showcase-section {
  padding: var(--spacing-6);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-default);
  margin-bottom: var(--spacing-6);
}

.showcase-section h3 {
  margin: 0 0 var(--spacing-4) 0;
  font-size: var(--font-size-lg);
  color: var(--color-text-primary);
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
}

.demo-grid {
  display: grid;
  grid-template-columns: repeat(1, 1fr); /* 手機：1 欄 */
  gap: var(--spacing-4);
  margin-bottom: var(--spacing-4);
}

/* 平板：2 欄 */
@media (min-width: 640px) {
  .demo-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-5);
  }
}

/* 小桌面：3 欄 */
@media (min-width: 1024px) {
  .demo-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-6);
  }
}

/* 大桌面：4 欄 */
@media (min-width: 1280px) {
  .demo-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-6);
  }
}

.demo-card {
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  padding: var(--spacing-4);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-3);
}

.demo-card h4 {
  margin: 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.demo-btn {
  padding: var(--spacing-2) var(--spacing-4);
  background: linear-gradient(135deg, #0ea5e9, #06b6d4);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: var(--font-size-xs);
  font-weight: 500;
  transition: all 0.3s ease;
  min-width: 100px;
}

.demo-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(0, 217, 255, 0.2);
}

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

/* ============================================
   Anime.js Specific Styles
   ============================================ */

.circle-progress {
  max-width: 100%;
  filter: drop-shadow(0 0 10px rgba(0, 217, 255, 0.2));
}

.counter-display {
  font-size: 2rem;
  font-weight: 700;
  color: #00d9ff;
  text-align: center;
  min-height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.demo-list {
  list-style: none;
  padding: 0;
  margin: 0;
  width: 100%;
}

.demo-list li {
  padding: var(--spacing-2) var(--spacing-3);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-2);
  color: var(--color-text-primary);
  text-align: center;
  font-size: var(--font-size-xs);
}

.hover-box {
  width: 100px;
  height: 100px;
  background: linear-gradient(135deg, rgba(0, 217, 255, 0.1), rgba(6, 182, 212, 0.1));
  border: 2px solid #00d9ff;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: #00d9ff;
  font-weight: 500;
  transition: all 0.3s ease;
}

.hover-box:hover {
  background: linear-gradient(135deg, rgba(0, 217, 255, 0.2), rgba(6, 182, 212, 0.2));
  box-shadow: 0 0 20px rgba(0, 217, 255, 0.3);
}

/* ============================================
   GSAP Specific Styles
   ============================================ */

.flip-box {
  width: 100px;
  height: 100px;
  background: linear-gradient(135deg, #f43f5e, #ec4899);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 600;
  cursor: pointer;
  perspective: 1000px;
}

.timeline-box {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
  width: 100%;
}

.timeline-item {
  padding: var(--spacing-2) var(--spacing-3);
  background: linear-gradient(135deg, #8b5cf6, #7c3aed);
  color: white;
  border-radius: var(--radius-md);
  text-align: center;
  font-size: var(--font-size-xs);
  opacity: 0.3;
}

.text-anim {
  font-size: 1.5rem;
  font-weight: 700;
  color: #06b6d4;
  min-height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.combo-box {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, #fbbf24, #f59e0b);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-align: center;
}

/* ============================================
   Canvas Styles
   ============================================ */

canvas {
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-md);
  background: var(--color-bg-secondary);
  max-width: 100%;
  display: block;
  margin-bottom: var(--spacing-3);
}

.particle-canvas,
.wave-canvas,
.grid-canvas,
.draw-canvas {
  cursor: crosshair;
}

/* ============================================
   Tabs Navigation
   ============================================ */

.tabs-container {
  margin-bottom: var(--spacing-6);
  border-bottom: 1px solid var(--color-border-default);
  overflow: hidden;
}

.tabs {
  display: flex;
  gap: var(--spacing-1);
  overflow-x: auto;
  padding-bottom: var(--spacing-2);
  scrollbar-width: thin;
  scrollbar-color: var(--color-border-default) transparent;
  -webkit-overflow-scrolling: touch;
}

.tabs::-webkit-scrollbar {
  height: 4px;
}

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

.tabs::-webkit-scrollbar-thumb {
  background: var(--color-border-default);
  border-radius: 4px;
}

.tabs::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-tertiary);
}

.tab-item {
  padding: var(--spacing-2) var(--spacing-3);
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--color-text-secondary);
  cursor: pointer;
  font-size: var(--font-size-xs);
  font-weight: 500;
  transition: all 0.3s ease;
  white-space: nowrap;
  flex-shrink: 0;
}

.tab-item:hover {
  color: var(--color-text-primary);
}

.tab-item.active {
  color: #00d9ff;
  border-bottom-color: #00d9ff;
}

.tab-content {
  display: none;
  animation: fadeIn 0.3s ease;
}

.tab-content.active {
  display: block;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   Performance Monitor
   ============================================ */

.perf-monitor {
  position: fixed;
  top: 20px;
  right: 20px;
  background: rgba(15, 23, 42, 0.95);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  padding: var(--spacing-4);
  z-index: 1000;
  min-width: 120px;
}

.perf-metric {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-2) 0;
  font-size: var(--font-size-xs);
}

.metric-label {
  color: var(--color-text-secondary);
}

.metric-value {
  color: #00d9ff;
  font-weight: 600;
  font-family: 'Courier New', monospace;
}

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 639px) {
  .demo-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-4);
  }

  .tabs {
    flex-wrap: wrap;
  }

  .perf-monitor {
    top: 80px;
    right: 10px;
    font-size: var(--font-size-xs);
  }
}