.navbar-nav a::after,.navbar-nav a::before{display:inline-block;opacity:0;-webkit-transition:-webkit-transform .3s,opacity .2s;-moz-transition:-moz-transform .3s,opacity .2s;transition:transform .3s,opacity .2s}.navbar-nav a::before{margin-right:10px;content:'[';-webkit-transform:translateX(20px);-moz-transform:translateX(20px);transform:translateX(20px)}.navbar-nav a::after{margin-left:10px;content:']';-webkit-transform:translateX(-20px);-moz-transform:translateX(-20px);transform:translateX(-20px)}.navbar-nav a:focus::after,.navbar-nav a:focus::before,.navbar-nav a:hover::after,.navbar-nav a:hover::before{opacity:1;-webkit-transform:translateX(0);-moz-transform:translateX(0);transform:translateX(0)}.sec-1{background-color:#2ecc71}