.book-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
}

.book-card {
  border: 1px solid #ddd;
  padding: 15px;
  background: #fff;
  border-radius: 8px;
  text-align: center;
  transition: transform .2s, box-shadow .2s;
}
.book-card:hover {
  transform: scale(1.03);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
.card-cover {
  width: 150px;
  height: auto;
  display: block;
  margin: 0 auto 10px;
}
.author {
  font-size: 0.9em;
  color: #666;
}
.source-link {
  font-size: 0.9em;
  color: #007acc;
}

.book-detail {
  display: block !important;
  margin-top: 20px;
}
.book-detail .book-cover {
  display: block !important;
  float: none !important;
  width: 100%;
  max-width: 360px;
  height: auto;
  border-radius: 6px;
  margin: 0 0 16px 0;
}
.book-detail .book-info {
  display: block !important;
  max-width: 600px;
  width: 100%;
  margin: 0;
}

/* --------- New base styles and homepage polish --------- */
:root {
  --bg: #f6f8fb;
  --card-bg: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e5e7eb;
  --primary: #2563eb;
  --primary-contrast: #ffffff;
  --shadow: 0 6px 20px rgba(0,0,0,0.08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1020;
    --card-bg: #121836;
    --text: #e5e7eb;
    --muted: #9ca3af;
    --border: #26304d;
    --primary: #60a5fa;
    --primary-contrast: #0b1020;
    --shadow: 0 10px 24px rgba(0,0,0,0.4);
  }
}

html, body {
  background: var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Apple Color Emoji", "Segoe UI Emoji";
  line-height: 1.6;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

.hero {
  background: linear-gradient(135deg, rgba(37,99,235,0.08), rgba(99,102,241,0.08));
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px 24px;
  margin: 16px 0 28px;
}

.hero h1 {
  margin: 0 0 8px;
  font-size: 28px;
}

.hero p {
  margin: 0;
  color: var(--muted);
}

.book-grid {
  gap: 24px;
}

.book-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
  text-align: left;
  box-shadow: var(--shadow);
  transition: transform .18s ease, box-shadow .18s ease;
}

.book-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 28px rgba(0,0,0,0.12);
}

.card-cover-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 3/4;
  overflow: hidden;
  border-radius: 10px;
  background: #0d1117;
  margin-bottom: 12px;
}

.card-cover-wrapper img.card-cover {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  margin: 0;
}

.year-badge {
  position: absolute;
  top: 10px;
  left: 10px;
  background: rgba(0,0,0,0.65);
  color: #fff;
  font-size: 12px;
  padding: 4px 8px;
  border-radius: 999px;
  backdrop-filter: blur(4px);
}

.book-card h3 {
  font-size: 16px;
  margin: 6px 0 4px;
}

.author {
  margin: 0 0 8px;
  color: var(--muted);
}

.card-quote {
  margin: 10px 0 12px;
  color: var(--text);
  opacity: 0.9;
  font-size: 14px;
}

.clamp-3 {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary);
  color: var(--primary-contrast);
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
  padding: 8px 12px;
  border-radius: 10px;
  border: 1px solid transparent;
}

.btn:hover {
  filter: brightness(1.05);
}

.source-link-btn {
  justify-content: center;
}

.muted { color: var(--muted); }

/* Detail page nits */
.book-detail {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  box-shadow: var(--shadow);
}

.book-detail .book-info h1 {
  margin-top: 0;
}

@media (min-width: 720px) {
  .hero { padding: 32px 28px; }
  .hero h1 { font-size: 32px; }
  .book-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
}