:root {
  --bg: #090b10;
  --bg-alt: #0f131c;
  --surface: rgba(255,255,255,.045);
  --surface-strong: rgba(255,255,255,.075);
  --text: #f6f7fb;
  --muted: #aeb6c8;
  --line: rgba(255,255,255,.12);
  --accent: #8fa8ff;
  --accent-2: #59e3c0;
  --shadow: 0 24px 80px rgba(0,0,0,.32);
  --radius: 24px;
  --max: 1180px;
}

html[data-theme="light"] {
  --bg: #f7f8fc;
  --bg-alt: #edf1f8;
  --surface: rgba(255,255,255,.78);
  --surface-strong: #ffffff;
  --text: #10131a;
  --muted: #566176;
  --line: rgba(16,19,26,.12);
  --accent: #4267e8;
  --accent-2: #008f73;
  --shadow: 0 24px 70px rgba(52,66,105,.14);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
.container { width: min(calc(100% - 40px), var(--max)); margin-inline: auto; }
.skip-link { position: fixed; left: 16px; top: -60px; z-index: 999; background: var(--text); color: var(--bg); padding: 10px 14px; border-radius: 10px; }
.skip-link:focus { top: 16px; }

.site-header {
  position: sticky; top: 0; z-index: 50;
  border-bottom: 1px solid transparent;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(18px);
  transition: border-color .25s ease;
}
.site-header.scrolled { border-color: var(--line); }
.nav-wrap { min-height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 12px; font-weight: 750; letter-spacing: -.02em; }
.brand-mark { width: 38px; height: 38px; display: grid; place-items: center; border-radius: 12px; background: linear-gradient(135deg,var(--accent),var(--accent-2)); color: #071018; font-size: .84rem; }
.desktop-nav { display: flex; gap: 28px; color: var(--muted); font-size: .94rem; }
.desktop-nav a:hover { color: var(--text); }
.nav-actions { display: flex; align-items: center; gap: 8px; }
.icon-button, .menu-button { min-width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 13px; background: var(--surface); color: var(--text); cursor: pointer; }
.menu-button { display: none; padding-inline: 14px; }
.mobile-nav { display: none; padding: 0 20px 18px; border-top: 1px solid var(--line); }
.mobile-nav.open { display: grid; }
.mobile-nav a { padding: 12px 0; color: var(--muted); }

.hero { position: relative; overflow: clip; padding: 100px 0 70px; }
.hero-grid { display: grid; grid-template-columns: 1.06fr .94fr; gap: 72px; align-items: center; min-height: 650px; }
.hero-glow { position: absolute; width: 440px; height: 440px; filter: blur(90px); opacity: .18; border-radius: 50%; pointer-events: none; }
.hero-glow-one { background: var(--accent); right: 3%; top: 10%; }
.hero-glow-two { background: var(--accent-2); left: -15%; bottom: -25%; }
.eyebrow { margin: 0 0 18px; color: var(--accent-2); text-transform: uppercase; font-size: .78rem; font-weight: 800; letter-spacing: .16em; }
h1,h2,h3 { margin-top: 0; line-height: 1.08; letter-spacing: -.04em; }
h1 { margin-bottom: 26px; font-size: clamp(3.25rem, 7vw, 6.8rem); max-width: 900px; }
h2 { font-size: clamp(2.15rem, 4.6vw, 4.4rem); }
h3 { font-size: 1.22rem; }
.hero-lead { max-width: 700px; margin: 0 0 34px; color: var(--muted); font-size: clamp(1.08rem,2vw,1.32rem); }
.hero-actions, .mission-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 50px; padding: 0 20px; border-radius: 15px; border: 1px solid var(--line); font-weight: 750; transition: transform .2s ease, border-color .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); }
.button.primary { color: #071018; background: linear-gradient(135deg,var(--accent),var(--accent-2)); border-color: transparent; }
.button.secondary { background: var(--surface); }
.hero-note { margin-top: 22px; color: var(--muted); font-size: .9rem; }

.hero-visual { position: relative; padding: 34px; border: 1px solid var(--line); background: linear-gradient(145deg,var(--surface-strong),var(--surface)); border-radius: 32px; box-shadow: var(--shadow); }
.model-row { display: grid; grid-template-columns: repeat(3,1fr); gap: 12px; text-align: center; }
.model-row span { padding: 12px 8px; border: 1px solid var(--line); border-radius: 14px; background: var(--surface); font-weight: 750; }
.flow-lines { display: grid; grid-template-columns: repeat(3,1fr); height: 64px; }
.flow-lines span { width: 1px; margin: 0 auto; background: linear-gradient(var(--line),var(--accent)); }
.flow-lines.reverse span { background: linear-gradient(var(--accent-2),var(--line)); }
.dataset-core { padding: 34px 20px; text-align: center; border: 1px solid color-mix(in srgb,var(--accent) 55%,var(--line)); border-radius: 22px; background: linear-gradient(135deg,color-mix(in srgb,var(--accent) 16%,transparent),color-mix(in srgb,var(--accent-2) 12%,transparent)); }
.dataset-core strong, .dataset-core small { display: block; }
.dataset-core strong { font-size: 1.7rem; letter-spacing: -.03em; }
.dataset-core small { margin-top: 7px; color: var(--muted); }
.core-kicker { display: inline-block; margin-bottom: 10px; padding: 3px 9px; border: 1px solid var(--line); border-radius: 999px; color: var(--accent-2); font-weight: 800; }
.visual-caption { margin: 24px 0 0; text-align: center; color: var(--muted); font-size: .92rem; }

.stats { padding: 0 0 40px; }
.stat-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 14px; }
.stat-card { padding: 26px; border: 1px solid var(--line); border-radius: 20px; background: var(--surface); }
.stat-card strong { display: block; margin-bottom: 6px; font-size: 2rem; letter-spacing: -.05em; }
.stat-card span { color: var(--muted); }

.section { padding: 110px 0; }
.alt-section { background: var(--bg-alt); border-block: 1px solid var(--line); }
.split-section { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: start; }
.section-heading { max-width: 850px; }
.section-heading.centered { margin-inline: auto; text-align: center; }
.section-heading.centered p:last-child { max-width: 720px; margin-inline: auto; color: var(--muted); }
.prose { color: var(--muted); font-size: 1.08rem; }
.prose blockquote { margin: 32px 0 0; padding: 22px 24px; border-left: 3px solid var(--accent-2); background: var(--surface); color: var(--text); font-weight: 760; font-size: 1.25rem; }

.chart-card { margin-top: 50px; padding: 32px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow); }
.chart-legend { display: flex; justify-content: flex-end; gap: 22px; margin-bottom: 28px; color: var(--muted); font-size: .9rem; }
.chart-legend > span { display: inline-flex; align-items: center; gap: 8px; }
.dot { width: 10px; height: 10px; border-radius: 50%; }
.base-dot { background: color-mix(in srgb,var(--muted) 70%,transparent); }
.ft-dot { background: var(--accent-2); }
.bar-chart { display: grid; gap: 24px; }
.bar-group { display: grid; grid-template-columns: 150px 1fr 64px; gap: 18px; align-items: center; }
.bar-label strong, .bar-label span { display: block; }
.bar-label span { color: var(--muted); font-size: .85rem; }
.bars { display: grid; gap: 7px; }
.bar { display: block; height: 13px; width: var(--value); border-radius: 999px; transform-origin: left; animation: grow 1s ease both; }
.bar.base { background: color-mix(in srgb,var(--muted) 55%,transparent); }
.bar.ft { background: linear-gradient(90deg,var(--accent),var(--accent-2)); }
.delta { text-align: right; color: var(--accent-2); font-weight: 800; }
.chart-note { margin: 30px 0 0; padding-top: 22px; border-top: 1px solid var(--line); color: var(--muted); font-size: .9rem; }
@keyframes grow { from { transform: scaleX(0); } }

.pipeline-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; margin-top: 48px; }
.pipeline-card, .principle-card { padding: 28px; border: 1px solid var(--line); border-radius: 20px; background: var(--surface); }
.pipeline-card > span { display: inline-grid; place-items: center; width: 38px; height: 38px; margin-bottom: 22px; border-radius: 12px; background: color-mix(in srgb,var(--accent) 18%,transparent); color: var(--accent); font-weight: 850; }
.pipeline-card p, .principle-card p { margin-bottom: 0; color: var(--muted); }
.principle-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 16px; margin-top: 46px; }

.mission-section { padding-top: 90px; }
.mission-card { padding: clamp(32px,6vw,74px); border: 1px solid var(--line); border-radius: 30px; background: linear-gradient(135deg,color-mix(in srgb,var(--accent) 14%,var(--surface)),color-mix(in srgb,var(--accent-2) 10%,var(--surface))); box-shadow: var(--shadow); }
.mission-card h2 { max-width: 900px; }
.mission-card > p:not(.eyebrow) { max-width: 770px; color: var(--muted); font-size: 1.08rem; }
.mission-actions { margin-top: 30px; }

.site-footer { padding: 32px 0 50px; color: var(--muted); }
.footer-wrap { display: flex; justify-content: space-between; gap: 20px; border-top: 1px solid var(--line); padding-top: 28px; }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,*::before,*::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}

@media (max-width: 980px) {
  .desktop-nav { display: none; }
  .menu-button { display: inline-flex; align-items: center; }
  .hero { padding-top: 70px; }
  .hero-grid, .split-section { grid-template-columns: 1fr; gap: 50px; }
  .hero-grid { min-height: auto; }
  .stat-grid, .principle-grid { grid-template-columns: repeat(2,1fr); }
  .pipeline-grid { grid-template-columns: repeat(2,1fr); }
}

@media (max-width: 680px) {
  .container { width: min(calc(100% - 28px), var(--max)); }
  .brand-text { display: none; }
  .hero { padding: 56px 0 44px; }
  h1 { font-size: clamp(2.75rem,15vw,4.5rem); }
  .hero-visual, .chart-card { padding: 20px; border-radius: 22px; }
  .stat-grid, .pipeline-grid, .principle-grid { grid-template-columns: 1fr; }
  .section { padding: 78px 0; }
  .bar-group { grid-template-columns: 1fr 54px; gap: 10px; }
  .bar-label { grid-column: 1 / -1; }
  .chart-legend { justify-content: flex-start; flex-wrap: wrap; }
  .footer-wrap { flex-direction: column; }
}