.navbar-icon {
    height: 75px; /* or use 100% for dynamic scaling */
    width: 75px; /* maintains the aspect ratio */
    max-width: 150px; /* prevents it from getting too large */
    padding: 5px;
}
.login-form, .register-form {
    padding-bottom: 30px;
}

@media only screen and (min-width: 768px) {
    /* For desktop: */
    #player2 {
        width: 550px;
        height: 360px;
    }
}