#menuPrincipal{ position: sticky; top: 0; z-index: 999; } #menuMovil{ display: flex; align-items: center; flex-direction: row-reverse; width: 100%; } #menuPrincipal > ul{ display: none; width: 100%; margin-bottom: 10px; } #menuPrincipal > ul li { display: block; border-bottom: 1px dashed #FFFFFF; } #menuPrincipal #listMenuRoot { display: none; }