:root{--bg:#f6f7f5;--card:#fff;--text:#1b2320;--muted:#5d6a64;--primary:#0f7a5c;--primary-ink:#fff;--border:#dfe5e1}
@media (prefers-color-scheme:dark){:root{--bg:#121614;--card:#1b211e;--text:#e9efeb;--muted:#9aa8a1;--primary:#35c493;--primary-ink:#06251a;--border:#2a332f}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
a{color:var(--primary)}
.wrap{max-width:880px;margin:0 auto;padding:0 20px}
header.top{display:flex;justify-content:space-between;align-items:center;padding:20px 0}
.brand{font-weight:700;font-size:20px;letter-spacing:.2px;text-decoration:none;color:var(--text)}
.btn{display:inline-block;background:var(--primary);color:var(--primary-ink);padding:12px 22px;border-radius:10px;font-weight:600;text-decoration:none}
.btn.ghost{background:transparent;color:var(--primary);border:1px solid var(--primary)}
.hero{padding:56px 0 40px}
.hero h1{font-size:clamp(32px,6vw,52px);line-height:1.1;margin:0 0 16px}
.hero p{font-size:19px;color:var(--muted);max-width:620px;margin:0 0 28px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;padding-bottom:40px}
.card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:20px}
.card h3{margin:0 0 6px;font-size:17px}
.card p{margin:0;color:var(--muted);font-size:15px}
footer{border-top:1px solid var(--border);padding:24px 0 40px;color:var(--muted);font-size:14px;display:flex;gap:18px;flex-wrap:wrap}
article{padding:24px 0 40px}
article h1{font-size:30px;margin:8px 0 6px}
article h2{font-size:19px;margin:28px 0 6px}
.note{background:var(--card);border:1px solid var(--border);border-radius:10px;padding:12px 16px;color:var(--muted);font-size:14px}