body{
margin:0;
font-family:Arial, Helvetica, sans-serif;
background:linear-gradient(135deg,#0f172a,#020617);
color:white;
}

.header{
text-align:center;
padding:30px 10px;
}

.wrap{
display:flex;
justify-content:center;
align-items:center;
padding:20px;
}

.card{
background:#111827;
padding:30px;
border-radius:14px;
width:420px;
box-shadow:0 10px 30px rgba(0,0,0,0.4);
}

label{
display:block;
margin-top:15px;
font-size:14px;
}

input,select{
width:100%;
padding:10px;
margin-top:6px;
border-radius:8px;
border:none;
background:#1f2937;
color:white;
}

button{
margin-top:20px;
width:100%;
padding:12px;
border:none;
border-radius:10px;
background:#22c55e;
font-weight:bold;
cursor:pointer;
transition:0.2s;
}

button:hover{
transform:scale(1.03);
background:#16a34a;
}

.result{
margin-top:20px;
padding:15px;
background:#020617;
border-radius:10px;
text-align:center;
}

.hidden{
display:none;
}

.footer{
text-align:center;
padding:20px;
opacity:0.6;
}