/* ==========================================
   Video Demo Section Styles
   ========================================== */

.video-demo {
  padding: var(--spacing-3xl) 0;
  background: var(--bg-primary);
}

.video-demo .section-subtitle {
  max-width: 650px;
}

.video-wrapper {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.video-container {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 aspect ratio */
  height: 0;
  overflow: hidden;
  border-radius: var(--radius-xl);
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  box-shadow: var(--shadow-xl);
  cursor: pointer;
}

.video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: var(--radius-xl);
}

.video-thumbnail {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity var(--transition-base);
}

.video-container:hover .video-thumbnail {
  opacity: 0.9;
}

.video-play-button {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  z-index: 1;
  padding: 0;
}

.video-play-button:hover {
  transform: translate(-50%, -50%) scale(1.1);
}

.video-play-button:active {
  transform: translate(-50%, -50%) scale(0.95);
}

.video-play-button svg {
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.3));
  transition: filter var(--transition-base);
}

.video-play-button:hover svg {
  filter: drop-shadow(0 6px 12px rgba(0, 0, 0, 0.4));
}

.video-loading {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--bg-secondary);
  gap: var(--spacing-md);
}

.video-loading .spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--border-primary);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.video-loading p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  margin: 0;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.video-timestamps {
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.timestamps-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-lg);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  gap: var(--spacing-md);
}

.timestamps-toggle:hover {
  background: var(--bg-hover);
}

.timestamps-toggle:hover .toggle-icon {
  color: var(--primary);
}

.timestamps-toggle h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
  text-align: left;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.timestamps-toggle h3::before {
  content: '📑';
  font-size: 1.125rem;
}

.toggle-icon {
  color: var(--text-secondary);
  transition: all var(--transition-base);
  flex-shrink: 0;
  transform: rotate(-90deg);
}

.video-timestamps.expanded .toggle-icon {
  transform: rotate(0deg);
}

.timestamps-list {
  list-style: none;
  padding: 0;
  margin: 0;
  max-height: 0;
  overflow: hidden;
  transition:
    max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1),
    padding 0.4s cubic-bezier(0.4, 0, 0.2, 1),
    border-top 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  border-top: 0 solid var(--border-primary);
}

.video-timestamps.expanded .timestamps-list {
  max-height: 600px;
  padding: var(--spacing-md) var(--spacing-lg) var(--spacing-lg);
  border-top: 1px solid var(--border-primary);
}

.timestamps-list li {
  margin-bottom: var(--spacing-xs);
}

.timestamps-list a {
  display: flex;
  align-items: center;
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.5;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  text-decoration: none;
  position: relative;
}

.timestamps-list a::before {
  content: '▶';
  margin-right: var(--spacing-xs);
  font-size: 0.625rem;
  color: var(--text-tertiary);
  transition: all var(--transition-fast);
}

.timestamps-list a:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
  transform: translateX(4px);
}

.timestamps-list a:hover::before {
  color: var(--primary);
}

.timestamps-list a.active {
  background: rgba(102, 126, 234, 0.1);
  color: var(--primary);
  font-weight: 600;
  border-left: 3px solid var(--primary);
  padding-left: calc(var(--spacing-md) - 3px);
}

.timestamps-list a.active::before {
  color: var(--primary);
}