:root {
  --bg: #f7f3ee;
  --panel: #fffaf5;
  --panel-strong: #ffffff;
  --ink: #191512;
  --muted: #665e55;
  --line: #e4d7ca;
  --accent: #9c5c37;
  --accent-dark: #62361f;
  --accent-soft: #f0dfd1;
  --blue-soft: #e8f0f8;
  --shadow: 0 24px 80px rgba(70, 44, 28, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(211, 164, 124, 0.28), transparent 28rem),
    radial-gradient(circle at 85% 10%, rgba(115, 145, 176, 0.14), transparent 24rem),
    var(--bg);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  line-height: 1.6;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(98, 54, 31, 0.12);
  background: rgba(247, 243, 238, 0.84);
  backdrop-filter: blur(18px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 16px 0;
}

.brand {
  font-weight: 800;
  letter-spacing: -0.03em;
}

.nav-links {
  display: flex;
  gap: 22px;
  color: var(--muted);
  font-size: 14px;
}

.nav-links a {
  transition: color 160ms ease;
}

.nav-links a:hover {
  color: var(--accent-dark);
}

.hero {
  padding: 96px 20px 60px;
}

.hero-inner {
  width: min(1280px, 100%);
  margin: 0 auto;
  text-align: center;
}

.section-index {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  border: 1px solid rgba(156, 92, 55, 0.25);
  border-radius: 999px;
  background: rgba(255, 250, 245, 0.7);
  color: var(--accent-dark);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.section-index {
  padding: 7px 12px;
  margin-bottom: 14px;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 1240px;
  margin: 0 auto;
  font-size: clamp(42px, 7vw, 84px);
  line-height: 0.98;
  letter-spacing: -0.07em;
}

.authors {
  width: min(940px, 100%);
  margin: 36px auto 0;
  color: #3a312b;
  font-size: 15px;
}

.authors sup,
.author-notes sup {
  font-size: 0.68em;
  line-height: 0;
  vertical-align: super;
}

.affiliations {
  margin-top: 10px;
  color: var(--muted);
  font-size: 14px;
}

.author-notes {
  margin-top: 8px;
  color: #7b7067;
  font-size: 13px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin: 34px auto 0;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 41px;
  padding: 0 18px;
  border: 1px solid #d9d0c4;
  border-radius: 6px;
  background: rgba(255, 252, 247, 0.88);
  color: #3a3732;
  font-size: 15px;
  font-weight: 850;
  box-shadow: none;
  transition:
    background 160ms ease,
    border-color 160ms ease,
    transform 160ms ease;
}

.button.primary {
  border-color: #c9957b;
  background: #c89278;
  color: #fffaf5;
}

.button:hover {
  border-color: #c7b8a6;
  background: #fff8ef;
  transform: translateY(-1px);
}

.button.primary:hover {
  border-color: #b57e65;
  background: #ba8268;
}

.button-icon {
  display: inline-flex;
  width: 16px;
  height: 16px;
}

.button-icon svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.section {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 64px 0;
}

.section-heading {
  max-width: 820px;
  margin-bottom: 28px;
}

.section-heading h2 {
  margin-bottom: 14px;
  font-size: clamp(34px, 4.2vw, 58px);
  line-height: 1.02;
  letter-spacing: -0.055em;
}

.section-heading p {
  color: var(--muted);
  font-size: 18px;
}

.overview-section {
  padding-top: 38px;
}

.paper-figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel-strong);
  box-shadow: var(--shadow);
}

.paper-figure img {
  width: 100%;
}

.paper-figure.slim {
  padding: 18px;
}

.numbered-grid,
.method-grid,
.video-grid {
  display: grid;
  gap: 18px;
}

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

.overview-cards {
  margin-top: 22px;
}

.story-card,
.method-grid article,
.video-card {
  border: 1px solid rgba(98, 54, 31, 0.13);
  border-radius: 26px;
  background: rgba(255, 250, 245, 0.78);
  box-shadow: 0 18px 60px rgba(70, 44, 28, 0.08);
}

.story-card {
  padding: 28px;
}

.story-card h3,
.method-grid h3 {
  margin-bottom: 10px;
  font-size: 24px;
  letter-spacing: -0.04em;
}

.story-card p,
.method-grid p {
  margin-bottom: 0;
  color: var(--muted);
}

.method-grid {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  margin-top: 18px;
}

.method-grid article {
  padding: 24px;
}

.method-grid span,
.video-card-head span {
  display: block;
  margin-bottom: 10px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.stat-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  margin-bottom: 22px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--line);
  box-shadow: 0 18px 60px rgba(70, 44, 28, 0.07);
}

.stat-strip div {
  padding: 24px;
  background: rgba(255, 250, 245, 0.88);
}

.stat-strip strong {
  display: block;
  margin-bottom: 6px;
  color: var(--accent-dark);
  font-size: 34px;
  line-height: 1;
  letter-spacing: -0.05em;
}

.stat-strip span {
  color: var(--muted);
  font-size: 14px;
}

.table-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 14px;
}

.tab-button {
  border: 1px solid rgba(98, 54, 31, 0.16);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.65);
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  font-size: 14px;
  font-weight: 800;
  padding: 10px 14px;
}

.tab-button.active {
  background: var(--accent-dark);
  color: #fff9f2;
}

.table-panel {
  display: none;
}

.table-panel.active {
  display: block;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--panel-strong);
  box-shadow: var(--shadow);
}

table {
  width: 100%;
  min-width: 920px;
  border-collapse: collapse;
  font-size: 14px;
}

th,
td {
  border-bottom: 1px solid #eadfd4;
  padding: 13px 14px;
  text-align: center;
  white-space: nowrap;
}

th:first-child,
td:first-child {
  text-align: left;
}

thead th {
  position: sticky;
  top: 0;
  background: #fbf2e9;
  color: var(--accent-dark);
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

tbody tr:hover {
  background: #fff8f1;
}

tbody tr.ours {
  background: var(--blue-soft);
  color: #16314b;
}

td strong {
  color: inherit;
  font-weight: 900;
}

tbody tr:last-child td {
  border-bottom: 0;
}

.video-grid {
  grid-template-columns: 1fr;
}

.video-card {
  padding: 22px;
}

.video-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 10px;
}

.video-card-head span {
  margin-bottom: 0;
}

.video-card-head strong {
  display: block;
  margin-top: 4px;
  font-size: 18px;
  letter-spacing: -0.03em;
}

.play-pair-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex: 0 0 auto;
  min-height: 36px;
  padding: 0 14px;
  border: 1px solid #d9d0c4;
  border-radius: 6px;
  background: rgba(255, 252, 247, 0.9);
  color: #3a3732;
  cursor: pointer;
  font: inherit;
  font-size: 14px;
  font-weight: 850;
  transition:
    background 160ms ease,
    border-color 160ms ease,
    transform 160ms ease;
}

.play-pair-button:hover {
  border-color: #c7b8a6;
  background: #fff8ef;
  transform: translateY(-1px);
}

.play-pair-button::after {
  content: "▶";
  font-size: 11px;
  line-height: 1;
}

.play-pair-button.is-playing::after {
  content: "■";
  font-size: 10px;
}

.prompt-text {
  max-width: 980px;
  margin: 0 auto 16px;
  color: var(--muted);
  font-size: 14px;
  text-align: center;
}

.prompt-emphasis {
  color: #c33b2f;
}

.video-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  width: min(1040px, 100%);
  margin: 0 auto;
}

.video-pair figure {
  overflow: hidden;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel-strong);
}

.video-pair video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #16110e;
  object-fit: cover;
}

.video-pair figcaption {
  padding: 8px 10px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-align: center;
  text-transform: uppercase;
}

.citation-layout {
  display: grid;
  grid-template-columns: minmax(260px, 0.72fr) minmax(420px, 1fr);
  gap: 72px;
  align-items: start;
}

.citation-info {
  padding-top: 2px;
}

.citation-info span {
  display: block;
  margin-bottom: 14px;
  color: #7d8f6d;
  font-size: 16px;
  font-weight: 900;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.citation-info h2 {
  margin-bottom: 4px;
  color: #312f2b;
  font-size: clamp(36px, 4.2vw, 54px);
  line-height: 1;
  letter-spacing: -0.07em;
}

.citation-info p {
  max-width: 470px;
  margin-bottom: 28px;
  color: #38342f;
  font-size: 20px;
  line-height: 1.35;
}

.citation-info a {
  color: #687b69;
  font-size: 15px;
  font-weight: 900;
}

.bibtex-card {
  overflow: hidden;
  border: 1px solid #d8cec0;
  border-radius: 7px;
  background: #e9e1d5;
}

.bibtex-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 52px;
  padding: 0 13px;
  border-bottom: 1px solid #d8cec0;
  color: #77726b;
  font-size: 14px;
}

.copy-button {
  display: inline-grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border: 0;
  background: transparent;
  color: #24211e;
  cursor: pointer;
  padding: 0;
}

.copy-button svg {
  width: 19px;
  height: 19px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.copy-button.copied {
  color: var(--accent);
}

.bibtex-card pre {
  overflow-x: auto;
  margin: 0;
  padding: 22px 18px;
  color: #56514a;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 13px;
  font-weight: 700;
  line-height: 1.62;
  white-space: pre-wrap;
}

.footer {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 32px 0 54px;
  color: var(--muted);
  font-size: 14px;
  text-align: center;
}

.footer p {
  margin-bottom: 6px;
}

.footer .template-credit {
  margin-bottom: 0;
  color: #8a8177;
  font-size: 12px;
}

.footer .template-credit a {
  color: #687b69;
  font-weight: 800;
}

@media (max-width: 980px) {
  .nav {
    align-items: flex-start;
    gap: 12px;
  }

  .nav-links {
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 10px 16px;
  }

  .numbered-grid,
  .method-grid,
  .stat-strip,
  .video-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .citation-layout {
    grid-template-columns: 1fr;
    gap: 26px;
  }
}

@media (max-width: 640px) {
  .nav {
    width: min(100% - 28px, 1180px);
  }

  .nav-links {
    display: none;
  }

  .hero {
    padding: 72px 14px 40px;
  }

  .section {
    width: min(100% - 28px, 1180px);
    padding: 42px 0;
  }

  .numbered-grid,
  .method-grid,
  .stat-strip,
  .video-grid {
    grid-template-columns: 1fr;
  }

  .video-pair {
    grid-template-columns: 1fr;
  }

  .citation-info p {
    font-size: 18px;
  }

  .bibtex-card pre {
    font-size: 12px;
  }

  .paper-figure {
    border-radius: 10px;
  }
}