#bt_menu {
    display: none;
}
#bt_menu .open {
    display: none;
}
#bt_menu .close {
    display: block;
}
#bt_menu.closed .open {
    display: block;
}
#bt_menu.closed .close {
    display: none;
}
@media screen and (min-width: 601px){
    nav ul.menu {
        display: block !important;
    }
}
@media screen and (max-width: 600px){
    #bt_menu {
        display: block;
        margin-top: 20px;
    }
    nav ul.menu {
        display: none;
    }
    ul.menu li #home-icon {
        display: none;
    }
    ul.menu {
        padding: 0;
        text-align: center;
    }
}