:root{--bg:#faf8f4;--ink:#1d1b18;--muted:#6b665e;--accent:#208aef;--card:#fff;--line:#e7e2d9}
@media(prefers-color-scheme:dark){:root{--bg:#141311;--ink:#f3f0ea;--muted:#a09a8f;--card:#1e1c19;--line:#2e2b26}}
*{box-sizing:border-box}body{margin:0;font:17px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--ink)}
header,main,footer{max-width:760px;margin:0 auto;padding:20px 24px}
header{display:flex;justify-content:space-between;align-items:center}
header a.brand{font-weight:700;color:var(--ink);text-decoration:none;font-size:20px}
nav a{margin-left:18px;color:var(--muted);text-decoration:none}nav a:hover{color:var(--accent)}
h1{font-size:40px;line-height:1.15;letter-spacing:-.02em;margin:32px 0 12px}h2{margin-top:36px;font-size:22px}
p.lead{font-size:20px;color:var(--muted)}a{color:var(--accent)}
.grid{display:grid;gap:14px;margin:28px 0}@media(min-width:640px){.grid{grid-template-columns:1fr 1fr}}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:18px}.card h3{margin:0 0 6px;font-size:18px}.card p{margin:0;color:var(--muted)}
.btn{display:inline-block;background:var(--accent);color:#fff;padding:12px 20px;border-radius:12px;text-decoration:none;font-weight:600}
footer{color:var(--muted);font-size:14px;border-top:1px solid var(--line);margin-top:40px}footer a{color:var(--muted);margin-right:16px}