/* Site-wide polish for the book landing pages and chapters. */

:root {
  --book-accent: #3f5f57;
  --book-accent-soft: #e5ece8;
  --book-ink: #1f2529;
  --book-muted: #5b6670;
  --book-border: rgba(63, 95, 87, 0.16);
  --book-surface: rgba(255, 255, 255, 0.86);
}


a {
  color: var(--book-accent);
}

a:hover {
  color: #2e4a43;
}

.quarto-title-block .quarto-title-banner {
  background:
    linear-gradient(135deg, rgba(54, 77, 87, 0.94), rgba(39, 53, 61, 0.96)),
    radial-gradient(circle at top right, rgba(255, 255, 255, 0.14), transparent 35%);
  color: #fff;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.quarto-title-block .quarto-title-banner h1,
.quarto-title-block .quarto-title-banner .subtitle,
.quarto-title-block .quarto-title-banner .quarto-subtitle {
  color: #fff;
}

.book-hero {
  padding: 2rem 1.5rem;
  margin: 1rem 0 2rem;
  border: 1px solid var(--book-border);
  border-radius: 18px;
  background:
    linear-gradient(180deg, rgba(237, 240, 238, 0.88), rgba(255, 255, 255, 0.96)),
    linear-gradient(135deg, rgba(63, 95, 87, 0.07), transparent 60%);
  box-shadow: 0 14px 34px rgba(18, 35, 47, 0.06);
}

.book-cover-wrap {
  max-width: 420px;
  margin: 1.5rem auto 1rem;
}

.book-cover-img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 14px;
  box-shadow: 0 18px 42px rgba(18, 35, 47, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.35);
}

.quarto-cover-image {
  display: block;
  max-width: 340px;
  margin: 1.25rem auto 0.5rem;
  border-radius: 14px;
  box-shadow: 0 18px 42px rgba(18, 35, 47, 0.16);
}

.book-hero h2 {
  margin-top: 0;
  margin-bottom: 0.5rem;
  font-size: 1.75rem;
}

.book-hero p {
  color: var(--book-muted);
  font-size: 1.05rem;
}

.book-pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 1rem 0 0;
}

.book-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--book-border);
  color: var(--book-accent);
  font-size: 0.92rem;
  font-weight: 600;
}

.book-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0 2rem;
}

.book-card {
  padding: 1rem 1.1rem;
  border: 1px solid var(--book-border);
  border-radius: 14px;
  background: var(--book-surface);
  box-shadow: 0 10px 24px rgba(18, 35, 47, 0.04);
}

.book-card h3 {
  margin-top: 0;
  margin-bottom: 0.35rem;
  font-size: 1.05rem;
}

.book-card p {
  margin-bottom: 0;
  color: var(--book-muted);
}

.book-cta {
  display: inline-flex;
  margin-top: 1rem;
  padding: 0.65rem 1rem;
  border-radius: 12px;
  background: var(--book-accent);
  color: #fff;
  text-decoration: none;
  font-weight: 700;
}

.book-cta:hover {
  color: #fff;
  background: #304b45;
}

.book-cta-secondary {
  margin-left: 0.75rem;
  background: transparent;
  color: var(--book-accent);
  border: 1px solid var(--book-accent);
}

.book-cta-secondary:hover {
  color: #fff;
  background: var(--book-accent);
}

@media (max-width: 576px) {
  .book-cta-secondary {
    margin-left: 0;
  }
}

[data-bs-theme="dark"] {
  --book-ink: #dce6eb;
  --book-muted: #9cadb8;
  --book-accent: #7ab5a8;
  --book-accent-soft: rgba(63, 95, 87, 0.22);
  --book-surface: rgba(28, 38, 44, 0.88);
  --book-border: rgba(120, 180, 170, 0.18);
}

[data-bs-theme="dark"] .book-hero {
  background:
    linear-gradient(180deg, rgba(32, 44, 52, 0.94), rgba(22, 32, 38, 0.97)),
    linear-gradient(135deg, rgba(63, 95, 87, 0.14), transparent 60%);
}

[data-bs-theme="dark"] .book-pill {
  background: rgba(63, 95, 87, 0.28);
  border-color: rgba(120, 180, 170, 0.22);
  color: #7ab5a8;
}

[data-bs-theme="dark"] .book-card {
  background: var(--book-surface);
}

[data-bs-theme="dark"] .book-note {
  background: rgba(63, 95, 87, 0.14);
}

.book-note {
  padding: 0.95rem 1rem;
  border-left: 4px solid var(--book-accent);
  background: rgba(63, 95, 87, 0.07);
  border-radius: 0 12px 12px 0;
  margin: 1.25rem 0;
}

@media (max-width: 576px) {
  .book-hero {
    padding: 1.25rem 1rem;
    margin: 0.75rem 0 1.5rem;
    border-radius: 14px;
  }

  .book-hero h2 {
    font-size: 1.35rem;
    line-height: 1.15;
  }

  .book-hero p {
    font-size: 1rem;
  }

  .quarto-cover-image {
    max-width: 220px;
    margin: 1rem auto 0.75rem;
    float: none !important;
    clear: both;
  }

  .book-pill-row {
    gap: 0.45rem;
  }

  .book-pill {
    padding: 0.3rem 0.6rem;
    font-size: 0.84rem;
  }

  .book-grid {
    grid-template-columns: 1fr;
    margin: 1.25rem 0 1.5rem;
  }

  .book-card {
    padding: 0.9rem 1rem;
  }

  .book-cta {
    width: 100%;
    justify-content: center;
  }
}