:root{--bg:#f8fafc;--surface:#fff;--surface2:#f1f5f9;--text:#0f172a;--muted:#475569;--line:rgba(15,23,42,.1);--primary:#2563eb;--primary-hover:#1d4ed8;--header-bg:#0f172a;--header-text:#e2e8f0;--radius:16px;--radius2:22px;--shadow:0 10px 28px rgba(2,6,23,.1);--max:980px}*{box-sizing:border-box}html,body{margin:0;padding:0;overflow-x:hidden}img{max-width:100%;height:auto;display:block}body{font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;background:var(--bg);color:var(--text);font-size:16px;line-height:1.75}.container{width:100%;max-width:var(--max);margin:0 auto;padding:18px 16px}a{color:var(--primary);text-decoration:none}a:hover{color:var(--primary-hover);text-decoration:underline}.muted{color:var(--muted)}.site-header{position:sticky;top:0;z-index:999;background:rgba(15,23,42,.92);backdrop-filter:blur(10px);border-bottom:1px solid rgba(226,232,240,.14)}.header-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 0}.brand-title{margin:0;font-size:18px;font-weight:800;letter-spacing:-.2px;color:var(--header-text)}.brand-title a{color:inherit;text-decoration:none}.brand-title a:hover{text-decoration:none}h1,h2,h3{margin:0 0 12px;letter-spacing:-.4px}h1{font-size:30px}h2{font-size:22px}h3{font-size:18px}section{margin-bottom:22px}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius2);box-shadow:var(--shadow);padding:18px;margin-bottom:16px}.card:hover{box-shadow:0 14px 36px rgba(2,6,23,.14);border-color:rgba(15,23,42,.14)}.card p{margin:0;color:var(--muted)}.card h2,.card h3{margin-bottom:10px}.grid{display:grid;gap:16px;grid-template-columns:1fr}.site-footer{border-top:1px solid var(--line);margin-top:26px;padding:22px 0;color:var(--muted);text-align:center}@media (max-width:600px){.container{padding:16px 14px}h1{font-size:24px}h2{font-size:20px}.card{padding:16px}}