:root{--bg:#fbfbfa;--panel:#fff;--border:#e4e3df;--text:#1a1a18;--muted:#6b6a65;--accent:#8b2f2f;--ok:#2f6b4a}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#141413;--panel:#1c1c1a;--border:#2e2e2b;--text:#f2f1ee;--muted:#9b9a94;--accent:#d98a8a;--ok:#7fbf9a}}:root[data-theme=dark]{--bg:#141413;--panel:#1c1c1a;--border:#2e2e2b;--text:#f2f1ee;--muted:#9b9a94;--accent:#d98a8a;--ok:#7fbf9a}*{box-sizing:border-box}html,body{margin:0;padding:0}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,sans-serif;line-height:1.6}main{max-width:44rem;margin:0 auto;padding:4rem 1rem 6rem}.eyebrow{letter-spacing:.08em;text-transform:uppercase;color:var(--accent);margin:0 0 .75rem;font-size:.75rem;font-weight:600}h1{letter-spacing:-.02em;margin:0 0 .75rem;font-size:clamp(1.75rem,5vw,2.5rem);line-height:1.15}.lede{color:var(--muted);margin:0 0 2.5rem;font-size:1.05rem}.panel{background:var(--panel);border:1px solid var(--border);border-radius:12px;margin-bottom:1rem;padding:1.25rem 1.5rem}.panel h2{letter-spacing:.06em;text-transform:uppercase;color:var(--muted);margin:0 0 .9rem;font-size:.8rem;font-weight:600}ul.checklist{margin:0;padding:0;list-style:none}ul.checklist li{border-top:1px solid var(--border);align-items:baseline;gap:.7rem;padding:.35rem 0;display:flex}ul.checklist li:first-child{border-top:none}.mark{color:var(--muted);flex:0 0 1.1rem;font-weight:700}.mark[data-state=done]{color:var(--ok)}footer{color:var(--muted);margin-top:2.5rem;font-size:.85rem}code{background:var(--bg);border:1px solid var(--border);border-radius:4px;padding:.05rem .3rem;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.9em}