nav{background-color:#15172b;border-radius:20px;font-size:0;height:50px;margin:10px 0 0;width:320px}nav,nav a{position:relative}nav a{color:#fff;cursor:pointer;display:inline-block;font-size:16px;font-weight:600;height:100%;line-height:50px;text-align:center;text-decoration:none;text-transform:uppercase;z-index:1}nav .animation{border-radius:20px;height:100%;position:absolute;top:0;transition:all .5s ease 0s;z-index:0}a:first-child{width:159px}a:nth-child(2){width:160px}a:first-child:hover~.animation,nav .start-borrow{background-color:#1abc9c;left:0;width:159px}a:nth-child(2):hover~.animation,nav .start-return{background-color:#1abc9c;left:160px;width:160px}body{font-family:sans-serif}.border{border-right:1px solid #eee}