.header{height:75px;font-size:33px;font-family:Nunito,sans-serif;color:#1a325e;margin:10px 10px 0}.sidebar{position:absolute;background-color:#eff8f8;width:200px;height:100vh;overflow:hidden;transition:.5s}.navbarNavItem{display:flex;position:relative;overflow:hidden}.navbarNavItem:before{content:"";position:absolute;bottom:0;left:0;width:0;height:1px;background-color:gray;transition:width .4s ease,margin-left .4s ease}