.video-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1.5rem; margin: 1.5rem 0; }
.video-card { padding: 1.5rem; background: white; border-radius: 8px; box-shadow: 0 2px 8px rgba(0,0,0,0.08); transition: transform 0.2s, box-shadow 0.2s; }
.video-card:hover { transform: translateY(-4px); box-shadow: 0 4px 16px rgba(102, 126, 234, 0.2); }
.video-card h3 { margin-bottom: 0.5rem; font-size: 1.1rem; }
.video-card .meta { color: #999; font-size: 0.9rem; margin-bottom: 0.5rem; }
.video-card p { color: #666; line-height: 1.6; }
.intro, .list-entry { line-height: 1.8; }
.intro h2, .list-entry h2 { margin-bottom: 1rem; color: #667eea; }
table { background: white; }
table tr:nth-child(even) { background: #fafafa; }
@media (max-width: 768px) {
  .video-grid { grid-template-columns: 1fr; }
  .container { padding: 0 0.5rem; }
  main.container { padding: 1rem 0.5rem; }
}