:root{--bg:#fff;--text:#1a1a1a;--muted:#5c5c5c;--accent:#1d4ed8}@media (prefers-color-scheme:dark){:root{--bg:#121212;--text:#f2f2f2;--muted:#a8a8a8;--accent:#7aa2ff}}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);flex-direction:column;min-height:100vh;margin:0;font-family:system-ui,-apple-system,Segoe UI,sans-serif;line-height:1.55;display:flex}main{flex:1;width:100%;max-width:44rem;margin:0 auto;padding:4rem 1rem 2rem}h1{margin:0 0 1rem;font-size:clamp(1.8rem,5vw,2.6rem);line-height:1.15}p{margin:0 0 1rem}.lead{color:var(--muted);font-size:1.15rem}a{color:var(--accent)}footer{width:100%;max-width:44rem;color:var(--muted);margin:0 auto;padding:1.5rem 1rem;font-size:.85rem}