:root{--bg: #fbfcfe;--panel: #ffffff;--panel-soft: #f7f9fd;--text: #101826;--muted: #617089;--line: #dde6f3;--accent: #245fd1;--accent-soft: #eef4ff;--accent-2: #6c4cff;--shadow: 0 18px 56px rgba(16, 24, 38, .08);--max-width: 1100px;color-scheme:light;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-width:320px;background:radial-gradient(circle at top left,rgba(36,95,209,.08),transparent 28%),radial-gradient(circle at top right,rgba(108,76,255,.07),transparent 24%),linear-gradient(180deg,#fbfcfe,#f3f7fc);color:var(--text)}a{color:inherit;text-decoration:none}p{margin:0}.page-shell{width:min(var(--max-width),calc(100vw - 32px));margin:0 auto;padding:24px 0 64px}.hero,.section{background:#ffffffe6;border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.hero{padding:28px}.section{padding:24px;margin-top:20px}.topbar{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}.wordmark{font-weight:700;font-size:1rem;letter-spacing:.01em}.language-toggle{display:inline-flex;gap:6px;border:1px solid var(--line);background:var(--panel-soft);border-radius:999px;padding:4px}.language-link{color:var(--muted);padding:8px 12px;border-radius:999px;font-size:.95rem}.language-link.active{background:var(--accent);color:#fff}.hero-copy{margin-top:48px;max-width:760px}.eyebrow{display:inline-block;padding:7px 11px;border-radius:999px;background:var(--accent-soft);color:var(--accent);font-size:.76rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase}h1,h2,h3{margin:0;letter-spacing:-.02em}h1{margin-top:18px;font-size:clamp(2.6rem,5vw,5rem);line-height:.95;max-width:10ch}h2{font-size:clamp(1.5rem,2.5vw,2.2rem);line-height:1.05}h3{font-size:1.08rem;line-height:1.25}.lede,.track-card p,.diagram-card p,.info-card p{color:var(--muted)}.lede{margin-top:16px;font-size:1.05rem;line-height:1.75}.section-heading{display:flex;justify-content:space-between;gap:18px;align-items:end;flex-wrap:wrap}.section-heading.compact{align-items:start}.track-grid,.diagram-grid,.split-section{display:grid;gap:16px}.track-grid,.diagram-grid{margin-top:18px}.track-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.track-card,.diagram-card,.info-card{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:18px}.track-card{position:relative;overflow:hidden}.track-card:before{content:"";position:absolute;inset:0 0 auto;height:3px;background:linear-gradient(90deg,var(--accent),var(--accent-2))}.track-number{color:var(--accent);font-size:.82rem;font-weight:700;letter-spacing:.12em}.track-card h3,.diagram-card h3,.info-card h2{margin-top:10px}.track-card p,.diagram-card p,.info-card p{margin-top:10px;line-height:1.7}.diagram-grid{grid-template-columns:repeat(3,minmax(0,1fr));align-items:stretch}.diagram-card.emphasis{background:linear-gradient(180deg,#fff,#f7f8ff)}.diagram-card.subtle{background:var(--panel-soft)}.diagram-arrow{align-self:center;justify-self:center;color:var(--accent);font-size:1.8rem;line-height:1}.split-section{grid-template-columns:repeat(2,minmax(0,1fr))}.text-link{display:inline-block;margin-top:14px;color:var(--accent);font-weight:600}@media(max-width:900px){.track-grid,.diagram-grid,.split-section{grid-template-columns:1fr}.diagram-arrow{transform:rotate(90deg)}.hero-copy{margin-top:32px}}