/* UI Style 12 - Layout A */

body {
  font-size: 16px;
  padding: 0;
  margin: 0;
}

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

section {
  margin-bottom: 3rem;
}

h1 {
  font-size: 2rem;
  margin-bottom: 1rem;
  color: #222;
  line-height: 1.3;
}

h2 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: #333;
  border-left: 4px solid #0066cc;
  padding-left: 0.8rem;
}

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

h4 {
  font-size: 1rem;
  margin-bottom: 0.3rem;
}

p {
  margin-bottom: 1rem;
  line-height: 1.8;
}

.hero {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 3rem 2rem;
  border-radius: 8px;
  text-align: center;
  margin-bottom: 2rem;
}

.hero h1 {
  color: white;
  font-size: 2.2rem;
  margin: 0;
}

.intro {
  background: white;
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  margin-bottom: 2rem;
}

.intro p {
  margin: 0;
  font-size: 1.05rem;
  color: #555;
}

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

.card {
  background: white;
  padding: 1.5rem;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}

.card h3 a, .card h4 a {
  color: #0066cc;
}

.card .meta {
  color: #888;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.rank-card {
  position: relative;
  padding-left: 3.5rem;
}

.rank {
  position: absolute;
  left: 1rem;
  top: 1rem;
  width: 2rem;
  height: 2rem;
  background: #0066cc;
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 0.9rem;
}

.date-card .date-tag {
  display: inline-block;
  background: #f0f0f0;
  color: #666;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
}

.topic-group {
  margin-bottom: 2rem;
  background: white;
  padding: 1.5rem;
  border-radius: 8px;
}

.topic-group h3 {
  color: #0066cc;
  margin-bottom: 1rem;
  border-bottom: 2px solid #e0e0e0;
  padding-bottom: 0.5rem;
}

.list-header {
  background: white;
  padding: 2rem;
  border-radius: 8px;
  margin-bottom: 2rem;
}

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

.list-content .card {
  width: 100%;
}

.detail {
  background: white;
  padding: 2rem;
  border-radius: 8px;
}

.detail header {
  border-bottom: 2px solid #e0e0e0;
  padding-bottom: 1rem;
  margin-bottom: 2rem;
}

.meta-info {
  background: #f9f9f9;
  padding: 1.5rem;
  border-radius: 8px;
  margin-bottom: 2rem;
}

.meta-info p {
  margin-bottom: 0.5rem;
}

.one-line, .summary, .review {
  margin-bottom: 2rem;
}

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

.related-card {
  background: #f9f9f9;
  padding: 1rem;
  border-radius: 8px;
  transition: background 0.2s;
}

.related-card:hover {
  background: #f0f0f0;
}

@media (max-width: 768px) {
  main {
    padding: 1rem 0.5rem;
  }

  .hero {
    padding: 2rem 1rem;
  }

  .hero h1 {
    font-size: 1.5rem;
  }

  h1 {
    font-size: 1.5rem;
  }

  h2 {
    font-size: 1.3rem;
  }

  .card-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

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

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.2rem;
  }

  nav a {
    font-size: 0.75rem;
    padding: 0.3rem 0.1rem;
  }
}