.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.video-card {
  background: white;
  padding: 1.5rem;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
  transition: transform 0.2s, box-shadow 0.2s;
  position: relative;
}

.video-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 16px rgba(0,0,0,0.1);
}

.video-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  color: #333;
}

.video-card .meta {
  font-size: 0.85rem;
  color: #666;
  margin-bottom: 0.5rem;
}

.video-card .intro {
  font-size: 0.9rem;
  color: #555;
  line-height: 1.6;
}

.video-card.ranked .rank {
  position: absolute;
  top: -10px;
  right: -10px;
  background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  color: white;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 1.1rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.video-card.topic .genre-tag {
  display: inline-block;
  background: #667eea;
  color: white;
  padding: 0.3rem 0.8rem;
  border-radius: 20px;
  font-size: 0.8rem;
  margin-bottom: 0.8rem;
}

.video-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.video-item {
  background: white;
  padding: 1.5rem;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
  transition: box-shadow 0.2s;
}

.video-item:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.video-item h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.video-item.latest .date {
  background: #48bb78;
  color: white;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  font-size: 0.85rem;
}

.detail-page {
  background: white;
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.info-section {
  background: #f8f9fa;
  padding: 1.5rem;
  border-radius: 8px;
  margin-bottom: 2rem;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1rem;
}

.info-item {
  font-size: 0.95rem;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.tag {
  background: #667eea;
  color: white;
  padding: 0.3rem 0.8rem;
  border-radius: 20px;
  font-size: 0.85rem;
}

.content-section {
  margin-bottom: 2rem;
}

.content-section h2 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: #333;
  border-left: 4px solid #667eea;
  padding-left: 1rem;
}

.highlight {
  background: linear-gradient(135deg, #667eea20 0%, #764ba220 100%);
  padding: 1rem;
  border-radius: 8px;
  font-size: 1.1rem;
  line-height: 1.8;
  color: #333;
}

.summary, .review {
  line-height: 1.8;
  color: #444;
  font-size: 1rem;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1rem;
}

.related-card {
  background: #f8f9fa;
  padding: 1rem;
  border-radius: 8px;
  transition: background 0.2s;
}

.related-card:hover {
  background: #e9ecef;
}

.related-card h3 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

@media (max-width: 767px) {
  .video-grid {
    grid-template-columns: 1fr;
  }

  .info-grid {
    grid-template-columns: 1fr;
  }

  .related-grid {
    grid-template-columns: 1fr;
  }

  .detail-page {
    padding: 1rem;
  }
}