:root{--bg:#0b1220;--card:#0f172a;--text:#e5e7eb;--muted:#9ca3af;--brand:#60a5fa;}
*{box-sizing:border-box}html,body{height:100%}
body{margin:0;font:16px/1.55 system-ui,Segoe UI,Roboto,Arial,sans-serif;background:var(--bg);color:var(--text)}
.container{max-width:1100px;margin:auto;padding:0 16px}

/* Header */
.site-header{position:sticky;top:0;background:rgba(11,18,32,.85);backdrop-filter:blur(8px);border-bottom:1px solid #1f2937}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;font-weight:800}
.logo img{height:24px}
.nav a{color:var(--text);text-decoration:none;margin-left:18px}
.nav a:hover{color:#fff}

/* Hero */
.hero{padding:56px 0;background:linear-gradient(180deg,rgba(96,165,250,.15),transparent)}
.hero h1{font-size:clamp(28px,4vw,40px);margin:0 0 8px}
.hero p{color:var(--muted);margin:0 0 16px}
.btn{display:inline-block;background:var(--brand);color:#081120;text-decoration:none;padding:10px 16px;border-radius:12px;font-weight:700}

/* Grid cards */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px;margin:32px auto}
.card{background:var(--card);border:1px solid #1f2937;border-radius:16px;padding:16px;box-shadow:0 8px 24px rgba(0,0,0,.25)}
.card h2{margin:0 0 8px;font-size:18px}
.card p{margin:0;color:var(--muted)}
@media (hover:hover){.card:hover{transform:translateY(-2px);transition:transform .2s ease}}

/* Footer */
.site-footer{border-top:1px solid #1f2937;margin-top:32px}
.site-footer p{color:var(--muted)}