:root{color-scheme:light;--ink:#111827;--muted:#556070;--line:#d9dee8;--paper:#f5f7fb;--accent:#3157d5;--accent2:#18a88a}*{box-sizing:border-box}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:#fff;line-height:1.65}main{width:min(860px,calc(100% - 40px));margin:0 auto;padding:52px 0 80px}nav{display:flex;justify-content:space-between;gap:24px;align-items:center;padding-bottom:38px;border-bottom:1px solid var(--line)}nav a{color:var(--muted);text-decoration:none;margin-left:18px}.brand{display:flex;align-items:center;gap:12px;font-weight:800}.mark{display:grid;place-items:center;width:42px;height:42px;border-radius:12px;background:linear-gradient(145deg,var(--accent),var(--accent2));color:#fff;font-size:20px}header{padding:64px 0 32px}h1{font-size:clamp(40px,8vw,72px);line-height:1;letter-spacing:-.04em;margin:0 0 22px}h2{font-size:24px;margin:42px 0 10px}h3{font-size:18px;margin:28px 0 6px}p,li{color:var(--muted)}.lead{font-size:21px;max-width:720px}.card{background:var(--paper);border:1px solid var(--line);border-radius:18px;padding:24px 28px;margin:24px 0}.card strong{color:var(--ink)}a{color:var(--accent)}footer{margin-top:64px;padding-top:24px;border-top:1px solid var(--line);color:var(--muted);font-size:14px}@media(max-width:640px){main{width:min(100% - 28px,860px);padding-top:24px}nav{align-items:flex-start}nav .links{display:grid;text-align:right;gap:6px}nav a{margin:0}header{padding-top:44px}.card{padding:20px}}