:root{
  --brand-blue:#1976d2;
  --brand-dark:#0f172a; /* slate-900-ish */
  --text-light:#e2e8f0;
  --text-muted:#94a3b8;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,'Noto Sans',sans-serif;line-height:1.5;color:#0f172a;background:#ffffff}

/* Header */
.header{background:var(--brand-dark);color:var(--text-light);position:sticky;top:0;z-index:10}
.container{max-width:1100px;margin:0 auto;padding:0 20px}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:10px 0}
.brand{display:flex;align-items:center;gap:14px}
.brand img{height:100px;width:auto;display:block}
.brand .tagline{font-size:14px;color:var(--text-muted)}
nav a{color:var(--text-light);text-decoration:none;margin-left:18px;font-weight:600}
nav a:hover{color:#fff;text-decoration:underline}

/* Hero */
.hero{background:#0b1220;color:#eaf2ff;padding:80px 0;position:relative;overflow:hidden}
.hero .title{font-size:40px;font-weight:800;margin:0 0 10px}
.hero .subtitle{font-size:20px;color:#cbd5e1;margin:0 0 24px}
.btn{display:inline-block;background:var(--brand-blue);color:white;padding:12px 18px;border-radius:10px;text-decoration:none;font-weight:700}
.btn:hover{filter:brightness(1.05)}

/* Sections */
.section{padding:56px 0}
.section h2{font-size:28px;margin:0 0 10px}
.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.card{background:#f8fafc;border:1px solid #e2e8f0;border-radius:12px;overflow:hidden}
.card img{width:100%;height:auto;display:block}
.card .content{padding:14px}

/* Footer */
.footer{background:#0b1220;color:#cbd5e1;padding:24px 0;margin-top:40px}

/* Responsive */
@media(max-width:800px){
  .brand img{height:72px}
  .grid{grid-template-columns:1fr}
  .hero{padding:56px 0}
  .hero .title{font-size:32px}
}