body.ui-style-3 {
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  min-height: 100vh;
}

.container {
  animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.video-card {
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.video-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

header {
  backdrop-filter: blur(10px);
  background: rgba(255, 255, 255, 0.95);
}

nav a {
  transition: all 0.3s ease;
  position: relative;
}

nav a:hover {
  color: #667eea;
}

nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: #667eea;
  transition: all 0.3s ease;
  transform: translateX(-50%);
}

nav a:hover::after {
  width: 80%;
}

.tag {
  transition: all 0.2s ease;
}

.tag:hover {
  background: #667eea;
  color: #fff;
  transform: scale(1.05);
}

.section h2 {
  animation: slideIn 0.6s ease-out;
}

@keyframes slideIn {
  from { opacity: 0; transform: translateX(-30px); }
  to { opacity: 1; transform: translateX(0); }
}

.detail-header {
  position: relative;
  overflow: hidden;
}

.detail-header::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
  animation: rotate 20s linear infinite;
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.related-card {
  transition: all 0.3s ease;
  border: 1px solid transparent;
}

.related-card:hover {
  background: #fff;
  border-color: #667eea;
  transform: translateY(-3px);
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.2);
}

.rank-badge {
  transition: all 0.3s ease;
}

.video-card:hover .rank-badge {
  transform: scale(1.1) rotate(5deg);
}

.topic-section {
  transition: all 0.3s ease;
  border: 1px solid transparent;
}

.topic-section:hover {
  border-color: #0066cc;
  box-shadow: 0 4px 15px rgba(0, 102, 204, 0.1);
}

.date-badge {
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.8; }
}