body{margin:0;font-family:Arial;background:#0b0b0b;color:#eee}header{display:flex;justify-content:space-between;align-items:center;padding:20px;background:#111;position:sticky;top:0}nav a{color:#8fd3ff;margin:0 10px;text-decoration:none}.hero{padding:80px 30px;background:linear-gradient(#111,#000)}section{padding:40px 30px}.card{background:#181818;border:1px solid #00aaff55;border-radius:12px;padding:20px;margin:15px 0;box-shadow:0 0 12px #00aaff33}h1,h2,h3{color:#fff}footer{padding:30px;text-align:center;background:#111}