:root {
  --paper:#FAF7F1;
  --ink:#201B15;
  --muted:#8A8272;
  --copy:#4E4738;
  --detail:#5C5546;
  --soft-copy:#6B6350;
  --line:#E0D8C6;
  --line-soft:#E8E1D2;
  --panel:#F3EEE1;
  --selection:#EAE2CF;
  --fable:oklch(0.52 0.13 45);
  --gpt:oklch(0.52 0.13 255);
}

body {
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:'Spectral',serif;
  -webkit-font-smoothing:antialiased;
}

a { color:var(--fable); }
a:hover { color:var(--ink); }
summary { list-style:none; }
summary::-webkit-details-marker { display:none; }
::selection { background:var(--selection); }

.page-shell {
  width:80%;
  max-width:none;
  box-sizing:border-box;
}

.hero-copy {
  width:80vw;
  max-width:none;
}

.site-hero {
  padding:96px 24px 64px;
  text-align:center;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:28px;
}

.site-hero__eyebrow {
  font-family:'IBM Plex Mono',monospace;
  font-size:15.36px;
  letter-spacing:0.22em;
  text-transform:uppercase;
  color:var(--muted);
}

.site-hero__title {
  font-family:'Cormorant Garamond',serif;
  font-weight:500;
  font-size:clamp(38.4px,5.632vw,58.88px);
  line-height:1.24;
  margin:0;
  text-wrap:pretty;
}

.site-hero__intro {
  font-size:19.2px;
  line-height:1.6;
  color:var(--soft-copy);
  margin:0;
}

.model-pills {
  display:flex;
  gap:14px;
  justify-content:center;
  flex-wrap:wrap;
}

.model-pill {
  display:flex;
  align-items:center;
  gap:9px;
  border:1px solid var(--line);
  border-radius:999px;
  padding:9px 18px;
  font-family:'IBM Plex Mono',monospace;
  font-size:16px;
  color:var(--ink);
}

.model-dot {
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--accent);
}

.is-fable { --accent:var(--fable); }
.is-gpt { --accent:var(--gpt); }

.site-hero__summary {
  font-family:'IBM Plex Mono',monospace;
  font-size:14.08px;
  letter-spacing:0.16em;
  text-transform:uppercase;
  color:var(--muted);
}

.filter-controls {
  display:flex;
  justify-content:center;
}

.filter-tabs {
  display:inline-flex;
  border:1px solid var(--line);
  border-radius:999px;
  padding:3px;
  gap:2px;
}

.filter-tab {
  border:none;
  cursor:pointer;
  border-radius:999px;
  padding:8px 16px;
  font-family:'IBM Plex Mono',monospace;
  font-size:14.72px;
  letter-spacing:0.06em;
  transition:background .15s,color .15s;
}

.book-columns {
  margin:0 auto;
  padding:0 32px 88px;
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(340px,1fr));
  gap:0 80px;
}

.book-list { min-width:0; }

.section-bar {
  position:sticky;
  top:0;
  background:var(--paper);
  padding:20px 0 14px;
  border-bottom:2px solid var(--accent,var(--ink));
  z-index:3;
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:12px;
}

.section-bar__title {
  font-size:28.16px;
  font-weight:600;
  margin:0;
}

.section-bar__count {
  font-family:'IBM Plex Mono',monospace;
  font-size:14.08px;
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--muted);
}

.selection-principle {
  padding:24px 0 8px;
  display:flex;
  flex-direction:column;
  gap:10px;
}

.selection-principle__label {
  font-family:'IBM Plex Mono',monospace;
  font-size:13.44px;
  letter-spacing:0.16em;
  text-transform:uppercase;
  color:var(--accent);
}

.selection-principle__copy {
  font-style:italic;
  font-size:19.2px;
  line-height:1.65;
  color:var(--soft-copy);
  margin:0;
}

.book-card {
  display:flex;
  gap:18px;
  padding:26px 0;
  border-top:1px solid var(--line-soft);
}

.book-card--first { margin-top:18px; }
.book-card--last { border-bottom:1px solid var(--line-soft); }

.book-card__number {
  font-family:'Cormorant Garamond',serif;
  font-style:italic;
  font-size:37.12px;
  line-height:1.1;
  color:var(--accent);
  min-width:40px;
  text-align:right;
}

.book-card__body {
  flex:1;
  min-width:0;
  display:flex;
  flex-direction:column;
  gap:7px;
}

.book-card__title-row {
  display:flex;
  align-items:baseline;
  gap:10px;
  flex-wrap:wrap;
}

.book-card__title {
  font-size:24.32px;
  font-weight:600;
  line-height:1.35;
  margin:0;
}

.shared-badge {
  font-family:'IBM Plex Mono',monospace;
  font-size:12.8px;
  letter-spacing:0.1em;
  text-transform:uppercase;
  color:var(--muted);
  border:1px solid var(--line);
  border-radius:999px;
  padding:3px 9px;
  white-space:nowrap;
}

.book-card__author {
  font-family:'IBM Plex Mono',monospace;
  font-size:14.08px;
  letter-spacing:0.12em;
  text-transform:uppercase;
  color:var(--muted);
}

.body-copy {
  font-size:19.2px;
  line-height:1.65;
  color:var(--copy);
  margin:0;
}

.book-card__toggle {
  font-family:'IBM Plex Mono',monospace;
  font-size:13.44px;
  letter-spacing:0.14em;
  text-transform:uppercase;
  cursor:pointer;
  color:var(--accent);
}

.book-card__toggle:hover { color:var(--ink); }

.detail-copy {
  font-size:19.2px;
  line-height:1.65;
  color:var(--detail);
  margin:10px 0 0;
}

.book-card__previous-rank {
  margin:40px 0 4px;
  display:flex;
  align-items:baseline;
  gap:12px;
}

.book-card__previous-rank--compact { margin-top:26px; }

.book-card__previous-number {
  font-family:'Cormorant Garamond',serif;
  font-style:italic;
  font-size:25.6px;
  color:var(--gpt);
}

.book-card__previous-note {
  font-style:italic;
  font-size:20.48px;
  color:#57503F;
}

.shared-books {
  margin:0 auto;
  padding:0 32px 88px;
}

.shared-card {
  padding:34px 0;
  border-top:1px solid var(--line-soft);
  display:flex;
  flex-direction:column;
  gap:18px;
}

.shared-card--first { border-top:0; }

.shared-card__header {
  display:flex;
  align-items:baseline;
  gap:14px;
  flex-wrap:wrap;
}

.shared-card__number {
  font-family:'Cormorant Garamond',serif;
  font-style:italic;
  font-size:33.28px;
  color:var(--muted);
}

.shared-card__title {
  font-size:26.88px;
  font-weight:600;
  margin:0;
}

.shared-card__author {
  font-family:'IBM Plex Mono',monospace;
  font-size:14.08px;
  letter-spacing:0.12em;
  text-transform:uppercase;
  color:var(--muted);
}

.shared-card__answers {
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(300px,1fr));
  gap:24px 44px;
}

.shared-card__answer {
  display:flex;
  flex-direction:column;
  gap:8px;
}

.shared-card__model {
  display:flex;
  align-items:center;
  gap:7px;
  font-family:'IBM Plex Mono',monospace;
  font-size:13.44px;
  letter-spacing:0.12em;
  text-transform:uppercase;
  color:var(--muted);
}

.shared-card__model .model-dot {
  width:7px;
  height:7px;
}

.divergence {
  background:var(--panel);
  padding:80px 24px 88px;
}

.divergence__inner {
  margin:0 auto;
  padding:0 8px;
}

.divergence__header {
  text-align:center;
  display:flex;
  flex-direction:column;
  gap:12px;
  margin-bottom:56px;
}

.divergence__eyebrow {
  font-family:'IBM Plex Mono',monospace;
  font-size:14.08px;
  letter-spacing:0.22em;
  text-transform:uppercase;
  color:var(--muted);
}

.divergence__title {
  font-family:'Cormorant Garamond',serif;
  font-weight:500;
  font-size:clamp(35.84px,4.352vw,51.2px);
  margin:0;
}

.divergence__grid {
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(340px,1fr));
  gap:56px 80px;
}

.divergence__column {
  display:flex;
  flex-direction:column;
  gap:36px;
  min-width:0;
}

.divergence__model {
  display:flex;
  align-items:center;
  gap:9px;
  font-family:'IBM Plex Mono',monospace;
  font-size:16px;
}

.divergence__topic {
  display:flex;
  flex-direction:column;
  gap:10px;
}

.divergence__topic-title {
  font-size:23.04px;
  font-weight:600;
  margin:0;
}

.divergence__topic-copy {
  font-size:19.2px;
  line-height:1.7;
  color:var(--copy);
  margin:0;
}

.discuss-cta {
  margin:88px auto 0;
  padding:56px 24px 0;
  border-top:1px solid var(--line-soft);
  width:80%;
  box-sizing:border-box;
  text-align:center;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:18px;
}

.discuss-cta__mark {
  font-family:'Cormorant Garamond',serif;
  font-style:italic;
  font-size:25.6px;
  color:var(--muted);
}

.discuss-cta__title {
  font-family:'Cormorant Garamond',serif;
  font-weight:500;
  font-size:clamp(35.84px,4.352vw,51.2px);
  line-height:1.24;
  margin:0;
  text-wrap:pretty;
}

.discuss-cta__copy {
  font-size:19.2px;
  line-height:1.6;
  color:var(--soft-copy);
  margin:0;
  max-width:640px;
}

.discuss-cta__button {
  display:inline-block;
  margin-top:8px;
  border:1px solid var(--line);
  border-radius:999px;
  padding:11px 26px;
  font-family:'IBM Plex Mono',monospace;
  font-size:14.72px;
  letter-spacing:0.06em;
  text-transform:uppercase;
  text-decoration:none;
  color:var(--copy);
  transition:background .15s,color .15s,border-color .15s;
}

.discuss-cta__button:hover {
  background:var(--ink);
  border-color:var(--ink);
  color:var(--paper);
}

.site-footer {
  padding:56px 24px 72px;
  text-align:center;
  display:flex;
  flex-direction:column;
  gap:10px;
}

.site-footer__mark {
  font-family:'Cormorant Garamond',serif;
  font-style:italic;
  font-size:25.6px;
  color:var(--muted);
}

.site-footer__line {
  font-family:'IBM Plex Mono',monospace;
  font-size:14.08px;
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--muted);
  margin:0;
}

.site-footer__link { color:var(--soft-copy); }

.metrika-pixel {
  position:absolute;
  left:-9999px;
}

@media (max-width:760px) {
  .page-shell { width:calc(100% - 24px); }
  .hero-copy { width:calc(100vw - 24px); }
  main.page-shell,
  section.page-shell { padding-left:0!important; padding-right:0!important; }
  main.page-shell { grid-template-columns:minmax(0,1fr)!important; }
  .filter-tabs {
    display:flex!important;
    flex-direction:column;
    width:100%;
    border-radius:24px!important;
  }
  .filter-tab { white-space:normal; }
  .shared-badge { white-space:normal!important; }
}