/* Layout Variant F - UI Style 3 */
.video-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15) !important;
}

.video-list > div:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,0.1) !important;
}

@media (max-width: 768px) {
  .video-grid {
    grid-template-columns: 1fr !important;
  }
  .container {
    padding: 0 0.5rem !important;
  }
  main.container {
    margin-top: 1rem !important;
  }
}

button.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 50px;
  height: 50px;
  background: #1a73e8;
  color: white;
  border: none;
  border-radius: 50%;
  font-size: 1.2rem;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.3s;
  z-index: 1000;
}

button.back-to-top.visible {
  opacity: 1;
}

button.back-to-top:hover {
  background: #1557b0;
}