:root {
  --bg: #050505;
  --bg-alt: #0c0d10;
  --card: #111318;
  --card-soft: #171a21;
  --ink: #f7f4ee;
  --ink-soft: #d9d4c8;
  --muted: #9b9588;
  --accent: #f4b84a;
  --accent-2: #e86f43;
  --line: rgba(255, 255, 255, 0.11);
  --radius: 20px;
  --max-w: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(circle at 15% 0%, rgba(244, 184, 74, 0.18), transparent 30rem),
    radial-gradient(circle at 85% 8%, rgba(232, 111, 67, 0.14), transparent 28rem),
    var(--bg);
  color: var(--ink);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

a { color: inherit; text-decoration: none; }
img, video { display: block; max-width: 100%; }

.navbar {
  position: sticky;
  top: 0;
  z-index: 20;
  min-height: 60px;
  padding: 0 max(24px, calc((100vw - var(--max-w)) / 2));
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(5, 5, 5, 0.82);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}

.brand {
  font-family: Jost, sans-serif;
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--accent);
}

.nav-links { display: flex; gap: 6px; }
.nav-links a {
  padding: 7px 12px;
  border-radius: 999px;
  color: var(--ink-soft);
  font-size: 0.88rem;
  font-weight: 700;
}
.nav-links a:hover { background: rgba(255, 255, 255, 0.08); color: var(--ink); }

.hero {
  width: min(var(--max-w), calc(100% - 48px));
  margin: 0 auto;
  padding: 86px 0 54px;
  text-align: center;
}

.hero-eyebrow {
  margin: 0 0 16px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.hero-title {
  margin: 0;
  font-family: Jost, sans-serif;
  font-size: clamp(4rem, 13vw, 9rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 0.9;
  text-shadow: 0 0 42px rgba(244, 184, 74, 0.28);
}

.hero-subtitle {
  max-width: 900px;
  margin: 26px auto 0;
  color: var(--ink-soft);
  font-size: clamp(1.35rem, 3vw, 2.2rem);
  font-weight: 700;
  line-height: 1.22;
}

.hero-authors { margin: 24px auto 0; max-width: 980px; color: var(--ink); font-size: 1.08rem; font-weight: 700; }
.hero-affiliation { margin: 8px auto 0; max-width: 980px; color: var(--muted); }
.hero-notes { margin: 4px 0 0; color: var(--muted); font-size: 0.92rem; }
.hero-actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 12px; margin-top: 30px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 9px 18px;
  border: 1px solid rgba(244, 184, 74, 0.35);
  border-radius: 999px;
  background: rgba(244, 184, 74, 0.11);
  color: var(--ink);
  font: inherit;
  font-size: 0.92rem;
  font-weight: 800;
  cursor: pointer;
  transition: transform 0.2s, background 0.2s, border-color 0.2s;
}
.btn:hover { transform: translateY(-1px); background: rgba(244, 184, 74, 0.18); border-color: rgba(244, 184, 74, 0.7); }

.container { width: min(var(--max-w), calc(100% - 48px)); margin: 0 auto; }
.container.narrow { max-width: 900px; }
.container.wide { max-width: 1320px; }

.teaser-section { padding: 0 0 62px; }
.section { padding: 82px 0; border-top: 1px solid var(--line); }
.section-alt { background: linear-gradient(180deg, rgba(255,255,255,0.025), rgba(255,255,255,0.01)); }

.section-title {
  margin: 0 0 10px;
  font-family: Jost, sans-serif;
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 600;
  text-align: center;
}
.section-lead { max-width: 760px; margin: 0 auto 34px; color: var(--muted); text-align: center; font-size: 1.08rem; }

.paper-figure {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: 0 26px 70px rgba(0, 0, 0, 0.28);
}

.abstract-body {
  color: var(--ink-soft);
  font-size: 1.08rem;
  text-align: justify;
}
.abstract-body p { margin: 0 0 18px; }
.abstract-body strong { color: var(--ink); }

.method-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-bottom: 28px;
}
.method-card {
  min-height: 230px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(145deg, var(--card), var(--card-soft));
}
.step-num { color: var(--accent); font-size: 0.78rem; font-weight: 900; letter-spacing: 0.14em; }
.method-card h3 { margin: 26px 0 10px; font-size: 1.28rem; }
.method-card p { margin: 0; color: var(--ink-soft); }
.figure-block { margin: 34px 0 0; }
.figure-block figcaption { margin-top: 12px; color: var(--muted); text-align: center; }

.dataset-tabs {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-bottom: 26px;
}
.tab-btn {
  padding: 10px 22px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #101116;
  color: var(--ink-soft);
  font: inherit;
  font-weight: 900;
  cursor: pointer;
}
.tab-btn.active { background: var(--accent); color: #15100a; border-color: var(--accent); }

.dataset-panel { display: none; }
.dataset-panel.active { display: grid; gap: 22px; }
.demo-card {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.035);
}
.demo-card header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 14px;
  color: var(--ink);
  font-weight: 900;
}
.demo-card small { color: var(--muted); font-weight: 700; }
.comparison-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.media-tile {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #08090c;
}
.media-tile img, .media-tile video {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  background: #000;
}
.media-tile p {
  margin: 0;
  padding: 11px 12px 12px;
  color: var(--ink-soft);
  text-align: center;
  font-size: 0.92rem;
  font-weight: 800;
}

.citation-box {
  position: relative;
  display: grid;
  gap: 14px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #090a0d;
}
.citation-box pre {
  margin: 0;
  overflow-x: auto;
  color: var(--ink-soft);
  font-size: 0.9rem;
  line-height: 1.55;
}
.copy-btn { justify-self: start; }
.footer {
  padding: 28px 24px 42px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  text-align: center;
  font-size: 0.92rem;
}

@media (max-width: 860px) {
  .navbar { position: static; flex-direction: column; gap: 10px; padding: 14px 20px; }
  .nav-links { flex-wrap: wrap; justify-content: center; }
  .hero { padding-top: 54px; }
  .method-grid, .comparison-grid { grid-template-columns: 1fr; }
  .demo-card header { flex-direction: column; gap: 2px; }
}