body{
    margin:0;
    height:100vh;
    display:flex;
    justify-content:center;
    align-items:center;
    background:linear-gradient(135deg,#000,#333);
    font-family:Arial;
}

.login-container{
    background:white;
    padding:40px;
    border-radius:15px;
    width:320px;
    text-align:center;
    box-shadow:0 10px 30px rgba(0,0,0,0.3);
}

input{
    width:100%;
    padding:12px;
    margin:10px 0;
    border:1px solid #ddd;
    border-radius:8px;
}

button{
    width:100%;
    padding:12px;
    background:black;
    color:white;
    border:none;
    border-radius:8px;
    cursor:pointer;
}

button:hover{
    background:#444;
}

#error{
    color:red;
    margin-top:10px;
}