body { font-family: Arial; text-align:center; margin:0; }
header { background:#111; color:#fff; padding:20px; }
nav a { color:#fff; margin:0 10px; text-decoration:none; font-weight:bold; }
.hero { padding:40px; }
.btn { display:inline-block; background:#007bff; color:#fff; padding:10px 20px; border-radius:5px; }
.item { border:1px solid #ccc; padding:15px; margin:20px; width:60%; margin:auto; }
footer { background:#111; color:#fff; padding:10px; margin-top:50px; }0