:root {
  --bg: #efe8dc;
  --bg-strong: #e2d5c1;
  --panel: rgba(255, 250, 243, 0.78);
  --panel-strong: rgba(255, 248, 239, 0.96);
  --line: rgba(21, 41, 31, 0.12);
  --ink: #15291f;
  --muted: #5d6c62;
  --accent: #c06b2d;
  --accent-soft: rgba(192, 107, 45, 0.12);
  --forest: #234635;
  --shadow: 0 18px 50px rgba(39, 38, 32, 0.08);
  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-sm: 14px;
  --max-width: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  font-family: "Avenir Next", "Helvetica Neue", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(192, 107, 45, 0.14), transparent 26%),
    radial-gradient(circle at 80% 12%, rgba(35, 70, 53, 0.14), transparent 28%),
    linear-gradient(180deg, #f3ecdf 0%, var(--bg) 46%, #f7f2ea 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(21, 41, 31, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(21, 41, 31, 0.03) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.35), transparent 88%);
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  width: 100%;
}

button,
input,
video {
  font: inherit;
}

.page-shell {
  width: min(calc(100% - 40px), var(--max-width));
  margin: 0 auto;
  padding-bottom: 72px;
}

.site-header {
  position: sticky;
  top: 14px;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin: 18px 0 30px;
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 248, 239, 0.7);
  backdrop-filter: blur(18px);
  box-shadow: 0 8px 24px rgba(39, 38, 32, 0.05);
}

.brand {
  font-family: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Georgia, serif;
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  color: var(--muted);
}

.site-nav a:hover,
.text-link:hover {
  color: var(--accent);
}

.hero,
.section {
  position: relative;
  border: 1px solid var(--line);
  border-radius: calc(var(--radius-lg) + 4px);
  background: var(--panel);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(280px, 0.9fr);
  gap: 28px;
  padding: clamp(30px, 5vw, 56px);
}

.hero::after,
.section::after {
  content: "";
  position: absolute;
  inset: auto -10% -52% auto;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(192, 107, 45, 0.18), transparent 68%);
  pointer-events: none;
}

.hero-copy {
  position: relative;
  z-index: 1;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

h1,
h2,
h3,
th {
  font-family: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Georgia, serif;
}

h1 {
  margin: 0;
  max-width: 13ch;
  font-size: clamp(2.7rem, 6vw, 4.9rem);
  line-height: 0.95;
  letter-spacing: -0.04em;
}

h2 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1;
  letter-spacing: -0.03em;
}

h3 {
  margin: 0 0 10px;
  font-size: 1.35rem;
  line-height: 1.15;
}

.hero-summary,
.prose-card p,
.timeline-card p,
.result-highlight p,
.demo-note,
.resource-card p,
.fact-card p,
.figure-caption,
.affiliations,
td,
th {
  line-height: 1.65;
}

.hero-summary {
  max-width: 62ch;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 1.08rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 30px 0;
}

.button,
.filter-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border: 1px solid rgba(35, 70, 53, 0.18);
  border-radius: 999px;
  background: var(--panel-strong);
  color: var(--ink);
  cursor: pointer;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease, color 180ms ease;
}

.button:hover,
.filter-chip:hover,
.filter-chip.is-active {
  transform: translateY(-1px);
  border-color: rgba(192, 107, 45, 0.4);
  background: rgba(255, 244, 233, 0.98);
}

.disabled,
.disabled-link {
  opacity: 0.58;
  cursor: not-allowed;
}

.author-block {
  display: grid;
  gap: 8px;
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.author-block p {
  margin: 0;
}

.affiliations {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
}

.hero-panel {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 14px;
  align-content: start;
}

.metric-card {
  display: grid;
  gap: 8px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--panel-strong);
}

.accent-card {
  background: linear-gradient(135deg, rgba(35, 70, 53, 0.97), rgba(21, 41, 31, 0.95));
  color: #f5eee3;
}

.metric-value {
  font-family: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Georgia, serif;
  font-size: clamp(1.35rem, 3vw, 2rem);
  line-height: 1;
}

.metric-label {
  color: inherit;
  opacity: 0.82;
}

.section {
  margin-top: 28px;
  padding: clamp(28px, 4.5vw, 46px);
}

.section-tint {
  background:
    linear-gradient(180deg, rgba(255, 250, 243, 0.8), rgba(244, 237, 226, 0.88)),
    var(--panel);
}

.section-heading {
  display: grid;
  gap: 10px;
  margin-bottom: 28px;
}

.section-heading-split {
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 20px;
}

.overview-grid,
.analysis-grid,
.resource-grid {
  display: grid;
  gap: 22px;
}

.overview-grid {
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
}

.prose-card,
.fact-card,
.timeline-card,
.result-highlight,
.demo-card,
.resource-card,
.citation-card,
.figure-frame,
.table-wrap {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--panel-strong);
}

.fact-stack {
  display: grid;
  gap: 14px;
}

.figure-frame {
  display: grid;
  gap: 14px;
}

.figure-frame img {
  border-radius: calc(var(--radius-md) - 4px);
  border: 1px solid rgba(21, 41, 31, 0.08);
}

.figure-frame-wide img {
  aspect-ratio: 12 / 5;
  object-fit: contain;
  object-position: center;
  background: rgba(255, 255, 255, 0.66);
}

.figure-caption {
  margin: 0;
  color: var(--muted);
  font-size: 0.96rem;
}

.timeline-grid,
.results-strip,
.demo-grid {
  display: grid;
  gap: 18px;
}

.timeline-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 24px;
}

.timeline-index,
.result-benchmark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: fit-content;
  min-height: 30px;
  padding: 0 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

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

.result-highlight strong {
  display: block;
  margin: 18px 0 10px;
  font-family: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Georgia, serif;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1;
}

.table-wrap {
  margin-top: 22px;
  overflow-x: auto;
}

table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
}

thead th {
  padding-bottom: 14px;
  text-align: left;
  font-size: 1rem;
}

tbody td {
  padding: 14px 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.ours-row td {
  color: var(--ink);
  font-weight: 700;
}

.analysis-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 22px;
}

.analysis-grid-secondary {
  margin-top: 18px;
}

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

.demo-stack {
  display: grid;
  gap: 24px;
}

.demo-section {
  display: grid;
  gap: 16px;
}

.demo-subgroup {
  display: grid;
  gap: 12px;
}

.demo-subgroup + .demo-subgroup {
  margin-top: 4px;
}

.demo-subtitle {
  margin: 0;
  font-family: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Georgia, serif;
  font-size: 1.08rem;
  line-height: 1.2;
}

.demo-section.is-hidden {
  display: none;
}

.demo-note {
  margin: 0;
  max-width: 78ch;
  color: var(--muted);
}

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

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

.demo-card {
  padding: 12px;
  transition: opacity 180ms ease, transform 180ms ease;
}

.demo-card video {
  width: 100%;
  border-radius: calc(var(--radius-md) - 4px);
  background: #000;
}

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

.text-link {
  color: var(--forest);
  font-weight: 600;
}

.citation-card {
  margin-top: 22px;
  overflow-x: auto;
}

pre {
  margin: 0;
  white-space: pre-wrap;
}

code {
  font-family: "SFMono-Regular", Menlo, Consolas, monospace;
  font-size: 0.92rem;
}

.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 600ms ease, transform 600ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1080px) {
  .hero,
  .overview-grid,
  .timeline-grid,
  .results-strip,
  .analysis-grid,
  .resource-grid,
  .demo-grid,
  .section-heading-split {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 760px) {
  .page-shell {
    width: min(calc(100% - 24px), var(--max-width));
  }

  .site-header {
    top: 8px;
    margin-top: 12px;
    border-radius: 26px;
  }

  .site-nav {
    display: none;
  }

  .hero,
  .section {
    padding: 22px;
  }

  h1 {
    max-width: none;
  }

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

  .button,
  .filter-chip {
    width: 100%;
  }

  .hero-actions,
  .filter-row {
    width: 100%;
  }

  .figure-frame-wide img {
    aspect-ratio: auto;
    object-fit: contain;
  }
}