:root{
  --bg:#f7f6f2; --card:#ffffff; --ink:#1d2421; --muted:#5b6762; --line:#e3e1da;
  --brand:#0f6b54; --brand-ink:#ffffff; --accent:#e8f2ee;
}
@media (prefers-color-scheme: dark){
  :root{ --bg:#141816; --card:#1c2220; --ink:#ecefed; --muted:#a3ada8; --line:#2c3431;
         --brand:#4cc09c; --brand-ink:#0b1310; --accent:#1f2c27; }
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);
  font:16px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
a{color:var(--brand)}
.wrap{max-width:860px;margin:0 auto;padding:0 16px}
header{border-bottom:1px solid var(--line);background:var(--card)}
header .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:14px;padding-bottom:14px}
.logo{font-weight:700;font-size:1.1rem;color:var(--ink);text-decoration:none;letter-spacing:.2px}
.logo span{color:var(--brand)}
nav a{color:var(--muted);text-decoration:none;margin-left:16px;font-size:.95rem}
nav a:hover{color:var(--ink)}
.hero{padding:56px 0 32px}
.hero h1{font-size:clamp(1.8rem,4.5vw,2.6rem);line-height:1.2;margin:0 0 14px;text-wrap:balance}
.hero p{font-size:1.1rem;color:var(--muted);max-width:620px;margin:0 0 24px}
.btn{display:inline-block;background:var(--brand);color:var(--brand-ink);padding:12px 20px;border-radius:10px;text-decoration:none;font-weight:600}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;margin:8px 0 40px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px}
.card h3{margin:0 0 6px;font-size:1.05rem}
.card p{margin:0;color:var(--muted);font-size:.95rem}
section h2{font-size:1.35rem;margin:36px 0 10px}
.doc{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:24px;margin:32px 0}
.doc h1{font-size:1.7rem;margin:0 0 4px}
.doc h2{font-size:1.15rem;margin:28px 0 8px}
.doc .meta{color:var(--muted);font-size:.9rem;margin:0 0 18px}
.doc ul{padding-left:20px}
.note{background:var(--accent);border-radius:10px;padding:12px 14px;font-size:.95rem}
footer{border-top:1px solid var(--line);margin-top:40px;padding:22px 0;color:var(--muted);font-size:.9rem}
footer .wrap{display:flex;flex-wrap:wrap;gap:8px 18px;justify-content:space-between}
header .wrap{flex-wrap:wrap}
@media (max-width:560px){
  header .wrap{flex-direction:column;align-items:flex-start;gap:6px}
  nav a{margin:0 16px 0 0}
}