* {
  box-sizing: border-box;
}

html[data-theme="dark"] {
  --cp-bg: #050713;
  --cp-bg-elevated: #080b1d;
  --cp-surface: #0e1428;
  --cp-surface-soft: #131a33;
  --cp-border: rgba(229, 235, 255, 0.14);
  --cp-border-strong: rgba(229, 235, 255, 0.26);
  --cp-text: #f7f8ff;
  --cp-text-muted: #7d88aa;
  --cp-text-soft: #b8c1df;
  --cp-accent: #45ecff;
  --cp-accent-hover: #16ddff;
  --cp-accent-soft: rgba(48, 170, 217, 0.18);
  --cp-link: #428fff;
  --cp-shadow: 0 30px 100px rgba(0, 0, 0, 0.52);
  --cp-overlay: rgba(5, 7, 19, 0.84);
  --cp-panel: rgba(14, 20, 40, 0.82);
  --cp-panel-strong: rgba(8, 11, 29, 0.96);
  --cp-sheen: rgba(229, 235, 255, 0.035);
  --cp-highlight: #131a33;
}

html {
  background: var(--cp-bg);
  scroll-behavior: smooth;
}

body {
  position: relative;
  isolation: isolate;
  margin: 0;
  min-width: 20rem;
  background:
    radial-gradient(70rem 44rem at 8% -14%, var(--cp-accent-soft), transparent 62%),
    radial-gradient(58rem 42rem at 92% 8%, var(--cp-highlight), transparent 64%),
    radial-gradient(64rem 42rem at 52% 112%, var(--cp-accent-soft), transparent 68%),
    linear-gradient(180deg, var(--cp-bg-elevated), var(--cp-bg));
  background-attachment: fixed;
  color: var(--cp-text);
  font-family: "Segoe UI", Aptos, Calibri, -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 1rem;
  line-height: 1.5;
}

.starfield {
  position: fixed;
  z-index: 0;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

main,
.site-footer {
  position: relative;
  z-index: 1;
  width: min(100% - 2rem, 64rem);
  margin-inline: auto;
}

.site-header {
  padding: 4.5rem 0 2.5rem;
  border-bottom: 1px solid var(--cp-border);
}

.eyebrow {
  margin: 0 0 0.75rem;
  color: var(--cp-accent);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.title-row {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 2rem;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  max-width: 14ch;
  margin-bottom: 0.75rem;
  font-size: 2.75rem;
  font-weight: 750;
  line-height: 1.08;
  letter-spacing: 0;
}

.intro {
  max-width: 34rem;
  margin-bottom: 0;
  color: var(--cp-text-soft);
  font-size: 1.1rem;
}

.book-count {
  flex: 0 0 auto;
  margin-bottom: 0.25rem;
  color: var(--cp-text-muted);
}

.book-count strong {
  display: block;
  color: var(--cp-text);
  font-size: 2rem;
  font-weight: 650;
  line-height: 1;
}

.book-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 13rem), 1fr));
  gap: 1.5rem;
  margin: 0;
  padding: 2.5rem 0 5rem;
  list-style: none;
}

.book-grid > li {
  min-width: 0;
}

.book-card {
  position: relative;
  height: 100%;
  overflow: hidden;
  border: 1px solid var(--cp-border);
  border-radius: 1rem;
  background: var(--cp-surface);
  box-shadow: var(--cp-shadow);
  isolation: isolate;
}

.book-card::before {
  position: absolute;
  z-index: -1;
  inset: 0;
  background-image: linear-gradient(var(--cp-overlay), var(--cp-panel-strong)), var(--book-cover);
  background-position: center;
  background-size: cover;
  content: "";
  filter: saturate(0.9);
}

.cover-frame {
  aspect-ratio: 2 / 3;
  margin: 1rem 1rem 0;
  overflow: hidden;
  border: 1px solid var(--cp-border);
  border-radius: 0.625rem;
  background: var(--cp-bg-elevated);
}

.cover-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.book-content {
  padding: 1.125rem 1rem 1.25rem;
}

.rating {
  display: flex;
  width: max-content;
  min-height: 2rem;
  align-items: center;
  color: var(--cp-text-muted);
  font-size: 1.55rem;
  line-height: 1;
  letter-spacing: 0;
}

.star {
  display: inline-block;
  width: 1.35rem;
  text-align: center;
}

.star.is-filled {
  color: var(--cp-warning);
}

.reading-state {
  margin: 0.25rem 0 1.25rem;
  color: var(--cp-text-muted);
  font-size: 0.75rem;
}

h2 {
  margin-bottom: 0.3rem;
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: 0;
  overflow-wrap: anywhere;
}

.authors {
  min-height: 3rem;
  margin-bottom: 1rem;
  color: var(--cp-text-soft);
  font-size: 0.9rem;
}

.metadata {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 0.75rem;
  margin: 0;
  padding-top: 1rem;
  border-top: 1px solid var(--cp-border);
  font-size: 0.75rem;
}

.metadata div {
  min-width: 0;
}

.metadata .isbn {
  grid-column: 1 / -1;
}

.metadata dt {
  color: var(--cp-text-muted);
}

.metadata dd {
  margin: 0.15rem 0 0;
  color: var(--cp-text);
  font-variant-numeric: tabular-nums;
  overflow-wrap: anywhere;
}

blockquote {
  margin: 1rem 0 0;
  padding: 0.75rem 0 0.75rem 1rem;
  border-left: 2px solid var(--cp-accent);
  color: var(--cp-text-soft);
  font-size: 0.9rem;
}

.site-footer {
  padding: 1.5rem 0 2.5rem;
  border-top: 1px solid var(--cp-border);
  color: var(--cp-text-muted);
  font-size: 0.75rem;
}

.site-footer p {
  margin: 0;
}

@media (hover: hover) {
  .book-card {
    transition: border-color 180ms ease, transform 180ms ease;
  }

  .book-card:hover {
    border-color: var(--cp-border-strong);
    transform: translateY(-0.25rem);
  }
}

@media (min-width: 75rem) {
  .book-grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

@media (max-width: 40rem) {
  main,
  .site-footer {
    width: min(100% - 1.25rem, 64rem);
  }

  .site-header {
    padding-top: 2.75rem;
  }

  .title-row {
    display: block;
  }

  h1 {
    font-size: 2.1rem;
  }

  .book-count {
    margin-top: 1.75rem;
  }

  .book-count strong {
    display: inline;
    margin-right: 0.25rem;
    font-size: inherit;
  }

  .book-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
    padding-top: 1.5rem;
  }

  .book-card {
    border-radius: 0.625rem;
  }

  .cover-frame {
    margin: 0.5rem 0.5rem 0;
    border-radius: 0.375rem;
  }

  .book-content {
    padding: 0.875rem 0.625rem 1rem;
  }

  .rating {
    font-size: 1.2rem;
  }

  .star {
    width: 1rem;
  }

  .reading-state {
    min-height: 2.25rem;
    margin-bottom: 0.75rem;
  }

  h2 {
    font-size: 0.95rem;
  }

  .authors {
    min-height: 3.75rem;
    font-size: 0.78rem;
  }

  .metadata {
    display: block;
  }

  .metadata div + div {
    margin-top: 0.55rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .book-card {
    transition: none;
  }
}