body{font-family:Arial,sans-serif;background:linear-gradient(135deg,#0d1117,#16213e);color:#eef}header{position:sticky;top:0;background:#0008}nav ul{display:flex;gap:20px;list-style:none;padding:15px;margin:0;justify-content:center}nav a{text-decoration:none;color:#fff}section{padding:60px 0}.hero{min-height:80vh;display:flex;align-items:center}.card{background:#ffffff12;color:#fff;border:1px solid #ffffff22}
img{width:100%;border-radius:10px}
footer{border-top:1px solid #555}
aside ul, nav ul {	list-style: none;display: flex; justify-content: center;padding: 10px 0;margin: 0;flex-wrap: wrap;}
aside li, nav li {margin: 10px 15px;}
li a { text-decoration: none;color: inherit;}
img {margin: 10px auto; display:block;}