body{
font-family:Arial,sans-serif;
background:#0f172a;
display:flex;
justify-content:center;
align-items:center;
height:100vh;
margin:0;
}
.card{
background:#1e293b;
padding:30px;
border-radius:15px;
width:350px;
box-shadow:0 0 20px rgba(0,0,0,.3);
}
h1{
color:#fff;
text-align:center;
}
input{
width:100%;
padding:12px;
margin:8px 0;
border:none;
border-radius:8px;
box-sizing:border-box;
}
button{
width:100%;
padding:12px;
background:#3b82f6;
border:none;
border-radius:8px;
color:#fff;
cursor:pointer;
}
#result{
margin-top:15px;
color:#fff;
text-align:center;
}