body{margin:0;font-family:Arial;background:#0f172a;color:#fff}
.sidebar{position:fixed;width:250px;height:100%;background:#020617;padding:20px}
.sidebar h2{color:gold}
.sidebar a{display:block;color:#fff;margin:10px 0;text-decoration:none}
.content{margin-left:260px;padding:20px}
.card{background:#111827;padding:20px;border-radius:12px;margin-bottom:20px}
input{width:100%;padding:10px;margin:5px 0;border:none;border-radius:8px}
.btn{background:gold;color:#000;padding:10px;border:none;border-radius:8px;cursor:pointer}
@media(max-width:768px){.sidebar{width:100%;height:auto;position:relative}.content{margin-left:0}}