.submenu{
width: 100%;
position: absolute;
margin: 0;
padding: 0;
display: none;
text-align: justify;
}<meta name="viewport" content="width=device-width, initial-scale=1, viewport-fit=cover">display: flex; justify-content: center; align-items: center;#burger-menu.close + img {
-webkit-filter: invert(100%); filter: invert(100%);
}$('.block > img').attr('src', 'Новая ссылка');