Add Hamburger menu to Avenue mobile view

I actually found it in another thread and it worked very well for me: https://answers.squarespace.com/questions/223995/mobile-version-menu-to-show-instead-of-the-navigat.html

/* HAMBURGER NAVIGATION */ #mobileMenuLink a:after { content: '☰'; color: black; width: 100%; text-align: right; position: absolute; top: 0; left: 0; }