body{background:#0f172a;color:white;font-family:Arial;padding:0;margin:0}
header{display:flex;justify-content:space-between;padding:20px;background:#111827}
.hero,.card{margin:20px;padding:20px;border-radius:30px;background:rgba(255,255,255,.08);backdrop-filter:blur(10px)}
.menu{display:none}
@media(max-width:768px){.menu{display:block}}