body{margin:0;font-family:Arial;background:#0f172a;color:white}
.sidebar{position:fixed;left:0;top:0;width:220px;height:100%;background:#020617;padding-top:20px}
.sidebar a{display:block;padding:12px;color:#cbd5f5;text-decoration:none}
.sidebar a:hover{background:#1e293b}
.main{margin-left:220px;padding:30px}
.card{background:#1e293b;padding:20px;border-radius:10px;margin-bottom:20px}
.center{display:flex;justify-content:center;align-items:center;height:100vh}
input,select{width:100%;padding:10px;margin:5px 0;border-radius:5px;border:none}
button{padding:10px;width:100%;background:#3b82f6;border:none;border-radius:5px;color:white}