.sticky-nav{position:fixed;top:0;width:100%;background:rgba(20,35,60,.9);backdrop-filter:blur(10px)}#login-button:before{content:"";position:absolute;background:#3cb444;bottom:0;left:0;right:0;top:100%;z-index:-1;transition:top .2s ease-in}#login-button:hover:before{top:0}