CSS

#move-list {
    display: none;
    position: fixed;
    top:0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(2,16,62,0.9);
    justify-content: center;
    align-items: center;
    z-index: 6;
}
#move-list.main-menu{
    display: block;
}
#move-list .move-menu{
    position: absolute;
    border-radius: 10px;
    top:50%;
    left: 50%;
    transform: translate(-50%,-50%);
}
#move-list .move-menu a{
    font-size: 60px;
    letter-spacing: -2px;
    line-height: 130px;
    color: #ffffff;
    font-weight: 800;
    font-family: "Noto Sans CJ Kkr";
    text-align: center;
    padding-bottom:10px;
}
#move-list .move-menu a{
    border-bottom:4px solid #ffffff;
}
#move-list .move-menu a:hover{
    color:#1ec29a;
    border-bottom:4px solid #1ec29a;
}

jQuery

var menu_controller = {
            status_active: function ($drawer_menu){
                $drawer_menu.removeClass('menu-active'); //언액티브
                $('#move-list').removeClass('main-menu'); // 메인메뉴 오프
            },
            status_unactive: function ($drawer_menu) {
                $drawer_menu.addClass('menu-active'); //액티브
                $('#move-list').addClass('main-menu'); // 메인메뉴 온
            }
        }

        $(document).ready(function(){
            /*PC 메뉴 클릭하면 햄버거 버튼 체인지*/
            $('#drawer-menu').on("click", function(){
                var $drawer_menu = $('#drawer-menu');

                if($drawer_menu.hasClass('menu-active')){ //만약 액티브 상태라면
                    menu_controller.status_active($drawer_menu); //언액티브로
                } else { //액티브 상태가 아니라면
                    menu_controller.status_unactive($drawer_menu); //액티브로
                }
            })

            $("html").on("click", function(clicked){
                var $drawer_menu = $('#drawer-menu');
                var $move_list = $('#move-list').css("display");
                
                if($move_list === 'block'){ //메뉴가 떠 있는 상태라면
                    if(clicked.target.className === 'main-menu'){ //클릭한게 백그라운드라면
                        menu_controller.status_active($drawer_menu); //오프 메소드
                    }
                }
            })
        })