:root{--font-family:"Segoe UI", Tahoma, Geneva, Verdana, sans-serif}body{font-family:var(--font-family);margin:0;padding:0}.skip-link{color:#fff;z-index:100;background:red;padding:8px;transition:top .3s;position:absolute;top:-40px;left:0}.skip-link:focus{top:0}