html, body {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    background-color: #F6F6F6;
}

@media only screen and (max-width: 600px) {
    body {
        -webkit-user-select: none;  /* Chrome all / Safari all */
        -moz-user-select: none;     /* Firefox all */
        -ms-user-select: none;      /* IE 10+ */
        user-select: none;          /* Likely future */      
    }
}

button {
    background-color: #F6F6F6 !important;
    -webkit-tap-highlight-color: transparent;
}