body{margin:0;font-family:Arial;background:#0f172a;color:#f1f5f9}
header{background:#111827;padding:16px 24px;font-weight:bold;font-size:18px}
nav{display:flex;gap:20px;margin-top:8px}
nav a{color:#cbd5e1;text-decoration:none;font-size:14px}
nav a:hover{color:white}
.container{padding:24px;max-width:1100px;margin:auto}
.card{background:#1e293b;padding:20px;border-radius:12px;margin-bottom:20px}
input,button{padding:10px;border-radius:8px;border:none;font-size:14px}
input{width:100%;margin-bottom:12px;background:#0f172a;color:white;border:1px solid #334155}
button{background:#2563eb;color:white;cursor:pointer}
button:hover{background:#1d4ed8}