:root {
  color-scheme: dark;
  --bg: #050507;
  --panel: #101014;
  --panel-soft: #17171c;
  --text: #f7f7f8;
  --muted: rgba(247, 247, 248, 0.68);
  --line: rgba(255, 255, 255, 0.11);
  --accent: #facc15;
  --blue: #38bdf8;
}

* {
  box-sizing: border-box;
}

body.seo-page {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 18% 10%, rgba(56, 189, 248, 0.14), transparent 32%),
    radial-gradient(circle at 84% 6%, rgba(250, 204, 21, 0.1), transparent 28%),
    var(--bg);
  color: var(--text);
  font-family: Inter, "Segoe UI", system-ui, sans-serif;
}

.seo-header {
  min-height: 72px;
  padding: 18px clamp(18px, 4vw, 64px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  border-bottom: 1px solid var(--line);
  background: rgba(5, 5, 7, 0.82);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(16px);
}

.seo-brand,
.seo-header a {
  color: var(--text);
  text-decoration: none;
}

.seo-brand {
  font-weight: 900;
  font-size: 20px;
  letter-spacing: 0;
}

.seo-header nav {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.seo-header nav a {
  color: var(--muted);
  font-weight: 750;
  font-size: 14px;
}

.seo-book-layout,
.seo-collection {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: clamp(28px, 5vw, 72px) 0;
}

.seo-book-hero,
.seo-collection-hero,
.seo-related {
  border: 1px solid var(--line);
  background: rgba(16, 16, 20, 0.78);
  border-radius: 14px;
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.32);
}

.seo-book-hero {
  display: grid;
  grid-template-columns: minmax(210px, 320px) 1fr;
  gap: clamp(22px, 5vw, 56px);
  padding: clamp(20px, 4vw, 48px);
}

.seo-cover-wrap {
  aspect-ratio: 2 / 3;
  border-radius: 12px;
  overflow: hidden;
  background: var(--panel-soft);
}

.seo-cover-wrap img,
.seo-book-card img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

.seo-book-copy {
  align-self: center;
}

.seo-kicker {
  margin: 0 0 10px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

h1,
h2 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  letter-spacing: 0;
}

h1 {
  max-width: 820px;
  font-size: clamp(36px, 7vw, 72px);
  line-height: 0.94;
}

h2 {
  font-size: clamp(28px, 4vw, 42px);
}

.seo-author,
.seo-description,
.seo-collection-hero p {
  color: var(--muted);
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.65;
}

.seo-description {
  max-width: 760px;
}

.seo-meta-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 28px 0;
}

.seo-meta-grid div {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.04);
}

.seo-meta-grid dt {
  color: var(--muted);
  font-size: 12px;
  font-weight: 850;
  text-transform: uppercase;
}

.seo-meta-grid dd {
  margin: 6px 0 0;
  font-weight: 850;
}

.seo-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.seo-primary-btn,
.seo-secondary-btn {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  border-radius: 999px;
  font-weight: 900;
  text-decoration: none;
}

.seo-primary-btn {
  background: var(--accent);
  color: #111;
}

.seo-secondary-btn {
  border: 1px solid var(--line);
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
}

.seo-related,
.seo-collection-hero {
  margin-top: 24px;
  padding: clamp(20px, 4vw, 36px);
}

.seo-card-grid {
  margin-top: 22px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 18px;
}

.seo-book-card {
  min-width: 0;
  color: var(--text);
  text-decoration: none;
}

.seo-book-card img {
  aspect-ratio: 2 / 3;
  border-radius: 10px;
  background: var(--panel-soft);
}

.seo-book-card span,
.seo-book-card small {
  display: block;
  overflow-wrap: anywhere;
}

.seo-book-card span {
  margin-top: 10px;
  font-weight: 900;
}

.seo-book-card small {
  margin-top: 4px;
  color: var(--muted);
}

@media (max-width: 760px) {
  .seo-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .seo-book-hero {
    grid-template-columns: 1fr;
  }

  .seo-cover-wrap {
    max-width: 260px;
  }

  .seo-meta-grid {
    grid-template-columns: 1fr;
  }
}