body{font-family:Arial;background:#f3f4f6;margin:0}
header{background:#0f172a;color:#fff;padding:15px;text-align:center}
.container{max-width:1100px;margin:auto;padding:20px}
.card{background:#fff;padding:20px;border-radius:10px;margin-bottom:15px}
a{color:#2563eb;text-decoration:none}
input,button{padding:8px;margin:6px 0}