* {
    padding: 0%;
    margin: 0%;
    box-sizing: border-box;
}
.Loginpage {
    box-sizing: 50px;
    padding: 20px, 20px, 20px, 20px;
    margin: 20px;
    background-color: aliceblue;
}
span {
    box-sizing: content-box;
    background-color: brown;
}
#login {
box-sizing: content-box;
    background-color: brown;
}