body{margin:0;font:16px Arial;background:#07152f;color:#eef4ff;line-height:1.65}a{color:#55afff}header,footer{background:#091a38;padding:20px}nav,main{max-width:1000px;margin:auto}nav{display:flex;justify-content:space-between}.brand{font-size:22px;font-weight:bold;color:white;text-decoration:none}nav a{margin-left:16px}main{padding:50px 22px}.hero{padding:45px 0}.hero h1{font-size:48px;line-height:1.1}.muted{color:#b9c7df}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:15px}.card{background:#10264c;border:1px solid #29476f;border-radius:14px;padding:20px}footer{text-align:center;margin-top:40px}@media(max-width:600px){.hero h1{font-size:36px}}