body {
    font-family: Arial, sans-serif;
    background:#111;
    color:white;
}

.login-box {
    width:300px;
    margin:100px auto;
    padding:20px;
    background:#222;
    border-radius:10px;
}

input, button {
    width:100%;
    padding:10px;
    margin-top:10px;
}