:root{
  --bg:#ffffff;
  --text:#0f172a;
  --muted:#475569;
  --border:#e2e8f0;
  --card:#f8fafc;
  --link:#0f172a;
  --btn:#0f172a;
  --btnText:#ffffff;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:var(--bg);color:var(--text);}
a{color:var(--link);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:1080px;margin:0 auto;padding:0 18px}
.header{border-bottom:1px solid var(--border);background:#fff;position:sticky;top:0;z-index:10}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 0}
.brand{display:flex;align-items:center;gap:10px}
.brand img{height:38px;width:auto}
.nav{display:flex;flex-wrap:wrap;gap:14px;font-size:14px}
.nav a{padding:6px 8px;border-radius:10px}
.nav a.active,.nav a:hover{background:var(--card);text-decoration:none}
.hero{padding:28px 0}
.hero h1{font-size:34px;line-height:1.15;margin:0 0 10px}
.hero p{margin:0;color:var(--muted);max-width:70ch}
.grid{display:grid;grid-template-columns:repeat(3, 1fr);gap:16px}
.card{border:1px solid var(--border);border-radius:18px;overflow:hidden;background:#fff;box-shadow:0 1px 0 rgba(0,0,0,.03)}
.card img{width:100%;height:180px;object-fit:cover;display:block}
.card .body{padding:14px}
.kicker{font-size:12px;color:var(--muted);display:flex;gap:10px;flex-wrap:wrap}
.card h3{margin:8px 0 6px;font-size:18px;line-height:1.25}
.card p{margin:0;color:var(--muted);font-size:14px;line-height:1.5}
.footer{border-top:1px solid var(--border);margin-top:34px;padding:18px 0;color:var(--muted);font-size:14px}
.footer .cols{display:grid;grid-template-columns:2fr 1fr;gap:16px}
.footer a{color:var(--muted)}
.btn{display:inline-block;background:var(--btn);color:var(--btnText);padding:10px 14px;border-radius:14px;font-weight:600;font-size:14px}
.btn:hover{text-decoration:none;opacity:.92}
.btn.secondary{background:#fff;color:var(--text);border:1px solid var(--border)}
.badge{display:inline-block;border:1px solid var(--border);padding:4px 10px;border-radius:999px;font-size:12px;color:var(--muted);background:var(--card)}
.prose{max-width:78ch}
.prose h1{font-size:34px;line-height:1.15;margin:18px 0 8px}
.prose h2{margin-top:22px}
.prose p{color:var(--text);line-height:1.7}
.prose ul{line-height:1.7}
.prose .note{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:12px 14px;color:var(--muted)}
.post-hero{border:1px solid var(--border);border-radius:18px;overflow:hidden;margin:14px 0 18px}
.post-hero img{width:100%;height:auto;display:block}
.form{max-width:640px}
label{display:block;margin:10px 0 6px;font-weight:600}
input,textarea{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:12px;font-size:14px}
textarea{min-height:140px}
.small{font-size:12px;color:var(--muted)}
@media (max-width: 900px){
  .grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width: 620px){
  .grid{grid-template-columns:1fr}
  .hero h1{font-size:28px}
  .nav{gap:8px}
  .footer .cols{grid-template-columns:1fr}
}