@media screen and (max-width: 800px) {

#header_menu{display:none;}
#menu_mobile_button {display:block;}
#mobile_menu{display:block;}

}
@media screen and (min-width: 801px) {
#menu_mobile_button {display:none !important;}
#mobile_menu{display:none !important}
body{overflow:auto !important}
}