@media screen {
    /*@media screen and (max-width: 780px) {*/
    /*Display 'show menu' link*/
    .show-menu {
        margin: 0 !important;
        padding: 1em !important;
        text-align: right;
        display: block;
        float: right;
    }

    /*Show menu when invisible checkbox is checked*/
    input[type=checkbox]:checked ~ #menu {
        background-color: #747475 !important;
        display: block;
        height: 100vh;
    }
}