:root{--bg:#f6f8fb;--card:#fff;--text:#14213d;--muted:#5c6b82;--accent:#1d6fd8;--line:#dde4ee;box-sizing:border-box;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--bg:#0f1624;--card:#18223a;--text:#eef2fa;--muted:#9fb0cc;--accent:#5aa2ff;--line:#2a3756}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,"Segoe UI",sans-serif;line-height:1.65}
.site-header{background:var(--card);border-bottom:1px solid var(--line)}
.site-header .in{max-width:900px;margin:auto;padding:12px 16px;display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between}
.logo{font-weight:700;font-size:1.2rem;color:var(--text);text-decoration:none}
.site-nav a{margin-right:14px;color:var(--text);text-decoration:none;font-size:.95rem}.site-nav a:hover,.site-nav a.on{color:var(--accent)}
.wrap{max-width:900px;margin:auto;padding:24px 16px}
.wrap h1{font-size:2rem;line-height:1.2}.wrap h2{margin-top:1.8em}
.hero{padding:28px 0}.cta{display:inline-block;background:var(--accent);color:#fff;padding:12px 22px;border-radius:10px;text-decoration:none;font-weight:600}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px}
.box{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px}.box h3{margin-top:0}
.site-footer{border-top:1px solid var(--line);background:var(--card);margin-top:30px}
.site-footer .in{max-width:900px;margin:auto;padding:18px 16px;font-size:.9rem;color:var(--muted)}
.site-footer a{color:var(--muted);margin-right:14px}
a{color:var(--accent)}