:root{color-scheme:light;--ink:#172033;--muted:#64748b;--paper:#f6f8fb;--card:#ffffff;--accent:#2563eb}*{box-sizing:border-box}body,html{margin:0;min-height:100%}body{background:var(--paper);color:var(--ink);font-family:Arial,Noto Sans SC,sans-serif}.shell{display:grid;min-height:100vh;place-items:center;padding:24px}.card{width:min(680px,100%);padding:48px;border:1px solid #e2e8f0;border-radius:24px;background:var(--card);box-shadow:0 20px 60px #17203312}.eyebrow{margin:0 0 14px;color:var(--accent);font-size:12px;font-weight:700;letter-spacing:.14em}h1{margin:0;font-size:clamp(32px,6vw,56px);letter-spacing:-.04em}.lede{margin:20px 0 28px;color:var(--muted);font-size:17px;line-height:1.8}.endpoint{display:inline-block;padding:10px 14px;border-radius:10px;background:#eff6ff;color:#1d4ed8;font-family:ui-monospace,monospace}