:root {
  --bg: #f4efe4;
  --surface: rgba(255, 252, 246, 0.74);
  --surface-strong: rgba(255, 248, 235, 0.92);
  --text: #1e2220;
  --muted: #5a615c;
  --border: rgba(30, 34, 32, 0.14);
  --accent: #c35f3f;
  --accent-soft: rgba(195, 95, 63, 0.12);
  --teal: #216b6e;
  --gold: #d8ae43;
  --shadow: 0 20px 60px rgba(39, 32, 19, 0.12);
  --radius: 28px;
  --radius-sm: 18px;
  --max-width: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: "Space Grotesk", sans-serif;
  background:
    radial-gradient(circle at 10% 10%, rgba(195, 95, 63, 0.16), transparent 26%),
    radial-gradient(circle at 90% 0%, rgba(33, 107, 110, 0.14), transparent 24%),
    radial-gradient(circle at 85% 75%, rgba(216, 174, 67, 0.16), transparent 20%),
    linear-gradient(180deg, #f8f2e8 0%, #f3ede0 48%, #efe7d6 100%);
}

.page-backdrop {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.15) 1px, transparent 1px),
    linear-gradient(rgba(255, 255, 255, 0.15) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.18), transparent 70%);
}

.site-header,
.page,
.site-footer {
  position: relative;
  z-index: 1;
}

.site-header {
  width: min(calc(100% - 32px), var(--max-width));
  margin: 18px auto 0;
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border: 1px solid var(--border);
  border-radius: 999px;
  backdrop-filter: blur(18px);
  background: rgba(255, 251, 244, 0.7);
  box-shadow: 0 10px 24px rgba(39, 32, 19, 0.06);
}

.brand,
.site-nav a,
.button,
.filter-button,
.text-link {
  color: inherit;
  text-decoration: none;
}

.brand {
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.site-nav a {
  color: var(--muted);
  font-size: 0.95rem;
}

.page {
  width: min(calc(100% - 32px), var(--max-width));
  margin: 0 auto;
  padding: 34px 0 72px;
}

.hero,
.section,
.site-footer {
  animation: rise-in 0.7s ease both;
}

.hero {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 30px;
  align-items: start;
  padding: 56px 0 36px;
}

.hero-copy {
  display: grid;
  gap: 0;
}

.eyebrow,
.card-label,
.pill,
.step-index {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
}

h1,
h2,
h3 {
  margin: 0;
  font-family: "Fraunces", serif;
  line-height: 1.02;
}

h1 {
  max-width: 12ch;
  font-size: clamp(2.8rem, 6vw, 5.3rem);
}

h2 {
  max-width: 16ch;
  font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
  font-size: 1.45rem;
}

.lede,
.section-heading p,
.card p,
.demo-note,
.site-footer p,
.workflow-note,
.demo-howto,
.hero-meta,
.hero-authors,
.hero-novelty,
.showcase-note {
  margin: 0;
  line-height: 1.7;
  color: var(--muted);
}

.hero-authors {
  margin-top: 18px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
}

.hero-authors a {
  color: inherit;
  text-decoration: underline;
  text-decoration-color: rgba(33, 107, 110, 0.32);
  text-underline-offset: 0.18em;
}

.hero-authors a:hover {
  text-decoration-color: rgba(33, 107, 110, 0.8);
}

.hero-meta {
  margin-top: 4px;
  font-size: 0.95rem;
}

.lede {
  max-width: 58ch;
  margin-top: 18px;
  font-size: 1.1rem;
}

.hero-novelty {
  margin-top: 16px;
  padding-left: 14px;
  border-left: 3px solid rgba(195, 95, 63, 0.4);
}

.hero-novelty strong {
  color: var(--text);
}

.hero-actions,
.hero-strip-actions,
.resource-actions,
.citation-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.hero-actions {
  margin-top: 24px;
}

.button,
.filter-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.85rem 1.2rem;
  font: inherit;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.65);
  cursor: pointer;
  transition: transform 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}

.button:hover,
.filter-button:hover {
  transform: translateY(-1px);
}

.button.primary,
.filter-button.active {
  border-color: var(--text);
  background: var(--text);
  color: #fff7ef;
}

.button.secondary {
  background: rgba(255, 255, 255, 0.74);
}

.button:disabled,
.filter-button:disabled {
  opacity: 0.55;
  transform: none;
  cursor: default;
}

.text-link {
  display: inline-flex;
  align-items: center;
  color: var(--teal);
  font-weight: 700;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
}

.metric {
  padding: 16px 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: rgba(255, 252, 246, 0.72);
  box-shadow: var(--shadow);
}

.metric strong {
  display: block;
  margin-bottom: 4px;
  font-size: 1.4rem;
}

.metric span {
  color: var(--muted);
  line-height: 1.5;
}

.hero-visual {
  position: relative;
}

.hero-frame,
.card,
.code-block {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow);
}

.hero-frame {
  padding: 18px;
  background:
    linear-gradient(135deg, rgba(255, 244, 225, 0.9), rgba(242, 250, 248, 0.92));
}

.hero-frame img {
  width: 100%;
  display: block;
  border-radius: 20px;
}

.floating-note {
  position: absolute;
  right: -18px;
  bottom: -24px;
  width: min(320px, 80%);
  padding: 18px;
  border: 1px solid rgba(30, 34, 32, 0.12);
  border-radius: 24px;
  background: rgba(255, 248, 238, 0.95);
  box-shadow: 0 18px 40px rgba(39, 32, 19, 0.16);
}

.pill {
  display: inline-flex;
  margin-bottom: 10px;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
}

.hero-strip {
  display: grid;
  grid-column: 1 / -1;
  grid-template-columns: 1fr 1fr 0.95fr;
  gap: 18px;
  margin-top: 6px;
}

.hero-strip-card {
  padding: 22px;
}

.mini-bibtex {
  margin-top: 14px;
  padding: 14px;
  border-radius: 18px;
  background: rgba(30, 34, 32, 0.92);
  color: #f7ecdc;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  line-height: 1.6;
}

.section {
  padding-top: 64px;
}

.section-heading {
  display: grid;
  gap: 12px;
  margin-bottom: 24px;
}

.release-grid,
.dataset-grid,
.compare-grid,
.workflow-grid,
.sample-grid,
.prompt-grid,
.resource-grid,
.insight-grid,
.use-case-grid,
.caveat-grid {
  display: grid;
  gap: 18px;
}

.release-grid,
.workflow-grid,
.resource-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.compare-grid,
.dataset-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.insight-grid,
.caveat-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.use-case-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.sample-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.prompt-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.card {
  position: relative;
  overflow: hidden;
  padding: 22px;
}

.feature-card::before,
.dataset-card::before,
.sample-card::before,
.prompt-card::before,
.use-case-card::before,
.insight-card::before,
.caveat-card::before {
  content: "";
  position: absolute;
  inset: auto -10% -60% auto;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(216, 174, 67, 0.16), transparent 65%);
}

.card h3 {
  margin-bottom: 10px;
}

.card-label {
  margin: 0 0 10px;
  color: var(--accent);
}

.compare-card.accent {
  background:
    linear-gradient(135deg, rgba(33, 107, 110, 0.14), rgba(255, 250, 243, 0.88));
}

.dataset-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 14px 0 0;
}

.meta-chip,
.tag-chip {
  display: inline-flex;
  align-items: center;
  padding: 7px 10px;
  border-radius: 999px;
  background: rgba(30, 34, 32, 0.06);
  color: var(--muted);
  font-size: 0.9rem;
}

.tag-chip-accent {
  background: rgba(195, 95, 63, 0.11);
  color: var(--accent);
}

.dataset-links,
.resource-card p,
.workflow-note {
  margin-top: 14px;
}

.dataset-links a,
.resource-card a,
.link-list a {
  color: var(--teal);
}

.link-list {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

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

.step-index {
  display: inline-block;
  margin-bottom: 14px;
  color: var(--gold);
}

.code-block {
  margin-top: 22px;
  padding: 0;
  overflow: hidden;
  background: rgba(30, 34, 32, 0.94);
}

pre {
  margin: 0;
  overflow-x: auto;
  white-space: pre-wrap;
}

code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

.code-block code {
  display: block;
  padding: 20px;
  color: #f7ecdc;
  line-height: 1.65;
}

.demo-howto {
  margin-bottom: 18px;
  padding-left: 14px;
  border-left: 3px solid rgba(33, 107, 110, 0.3);
}

.demo-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}

.filter-group {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.showcase-summary {
  margin-bottom: 18px;
}

.showcase-note {
  margin-top: 10px;
}

.sample-card header {
  margin-bottom: 16px;
}

.sample-header {
  display: grid;
  gap: 8px;
}

.sample-header-top {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.sample-focus {
  font-size: 1.2rem;
}

.sample-path {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  word-break: break-word;
}

.sample-pair {
  display: grid;
  gap: 14px;
}

.sample-block {
  padding: 14px;
  border-radius: 18px;
}

.sample-block.factual {
  background: rgba(33, 107, 110, 0.09);
}

.sample-block.counterfactual {
  background: rgba(195, 95, 63, 0.11);
}

.sample-block strong {
  display: block;
  margin-bottom: 8px;
}

.prompt-card span {
  color: var(--accent);
  font-weight: 700;
}

.resource-actions {
  margin-top: 16px;
}

.citation-callout {
  padding: 26px;
  background:
    linear-gradient(135deg, rgba(255, 247, 232, 0.94), rgba(242, 250, 248, 0.92));
}

.citation-actions {
  margin-top: 18px;
}

.citation-code {
  margin-top: 18px;
}

.demo-note {
  margin-top: 14px;
}

.site-footer {
  width: min(calc(100% - 32px), var(--max-width));
  margin: 0 auto 38px;
  padding: 20px 22px;
  border: 1px solid var(--border);
  border-radius: 24px;
  background: rgba(255, 251, 244, 0.74);
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1040px) {
  .hero,
  .hero-strip,
  .compare-grid,
  .dataset-grid,
  .release-grid,
  .workflow-grid,
  .sample-grid,
  .prompt-grid,
  .resource-grid,
  .insight-grid,
  .use-case-grid,
  .caveat-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 42px;
  }

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

  .floating-note {
    position: static;
    width: 100%;
    margin-top: 16px;
  }
}

@media (max-width: 720px) {
  .site-header {
    flex-direction: column;
    align-items: flex-start;
    border-radius: 28px;
  }

  .site-nav {
    gap: 12px;
  }

  .page {
    width: min(calc(100% - 22px), var(--max-width));
  }

  .hero,
  .section {
    padding-top: 40px;
  }

  .card,
  .hero-frame,
  .citation-callout {
    padding: 18px;
  }

  .hero-actions,
  .hero-strip-actions,
  .resource-actions,
  .citation-actions {
    align-items: stretch;
  }
}