table.Login.AccoungLogin {
    margin: 2rem auto 0 auto;
    max-width: 500px;
}

    table.Login.AccoungLogin td.NewUser {
        display: none;
    }

    table.Login.AccoungLogin h3:first-child {
        display: none;
    }

    table.Login.AccoungLogin td.ExistingUser {
        width: 100%;
    }

        table.Login.AccoungLogin td.ExistingUser input:is([type="text"],[type="password"]) {
            width: 100%;
        }

        table.Login.AccoungLogin td.ExistingUser input[type="submit"] {
            margin: 1rem 0 0 0;
        }

@media only screen and (max-width: 570px) {
    table.Login.AccoungLogin td.ExistingUser {
        padding: 15px !important;
    }

        table.Login.AccoungLogin td.ExistingUser input:is(#txtEmail,#ctl00_Content_txtPassword) {
            width: 100% !important;
        }
}