:root{font-family:Arial,Helvetica,sans-serif;color:#e9f2ff;background:#0b1424}
*{box-sizing:border-box}body{margin:0;line-height:1.7}
header,main,footer{max-width:850px;margin:auto;padding:24px}
header{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}
a{color:#7ec8ff}nav a{margin-left:16px}
.hero{padding:60px 0}h1{font-size:clamp(2rem,5vw,3.5rem);line-height:1.2}
.card{background:#14233a;border:1px solid #29415e;border-radius:14px;padding:24px;margin:20px 0}
small,footer{color:#a8b8cb}