body {
    background-image: url("login_background_filled_2.png");
    background-size: 50px;
    background-color: #222;
}

#login_form {
    margin: 100px auto 0;
    padding: 5px;
    background: white;
    width: 400px;
    border-radius: 30px;
    box-shadow: 0 15px 10px -5px black;
}

#login_fields {
    padding: 5%;
}

#login_fields input {
    margin: 5px 0;
}

input[type="text"], input[type="password"] {
    margin: 0 auto;
    padding: 10px;
    width: 90%;
    background: gainsboro;
    border: 1px solid gainsboro;
    border-radius: 5px;
}

#sender {
    min-width: 75px;
}