:root{
  --primary:#0b3b6f; /* top bar blue */
  --accent:#0a66c2;
  --gold:#ffb400;
  --dark:#07102a;
  --white:#fff;
}
*{box-sizing:border-box}
body{font-family:Inter,Arial,Helvetica,sans-serif;margin:0;background:#fff;color:#111}
.site-header{background:linear-gradient(90deg,#05223a,#083a5a);padding:12px 0;color:#fff}
.site-header .container{display:flex;align-items:center;justify-content:space-between}
.main-nav a{color:rgba(255,255,255,0.95);text-decoration:none;margin-left:14px;font-weight:600}
.container{max-width:1100px;margin:0 auto;padding:20px}
.hero{background:linear-gradient(90deg,#f5fbff,#e9f3ff);padding:40px;border-radius:6px;margin-top:18px}
.hero h1{font-size:22px;color:#063d66;margin-bottom:10px}
.btn{display:inline-block;padding:10px 14px;border-radius:6px;background:var(--accent);color:#fff;text-decoration:none;font-weight:700}
.features{display:flex;gap:16px;margin-top:18px}
.card{background:#fff;border-radius:8px;padding:18px;box-shadow:0 6px 20px rgba(11,22,30,0.06);flex:1}
.auth{max-width:420px;margin:30px auto}
input,select{width:100%;padding:10px;margin:8px 0;border-radius:6px;border:1px solid #ddd}
.alert{background:#ffecec;padding:10px;color:#a94442;border:1px solid #f5c6cb}
.success{background:#e6ffed;padding:10px;color:#2e7d32;border:1px solid #b6e7c2}
.ads-grid{display:flex;gap:12px;flex-wrap:wrap}
.ad-card{border:1px solid #eee;padding:12px;border-radius:8px;width:220px;text-align:center}
.site-footer{background:#07243f;color:#cfe4ff;padding:16px;text-align:center;margin-top:30px}