.btn{width:10em;position:relative;height:3.5em;border:3px ridge #86f54e;outline:none;background-color:transparent;color:#fff;transition:1s;border-radius:.3em;font-size:16px;font-weight:700;cursor:pointer}.btn:after{top:-10px}.btn:after,.btn:before{content:"";position:absolute;left:3%;width:95%;height:40%;background-color:#00090f;transition:.5s;transform-origin:center}.btn:before{top:80%}.btn:hover:after,.btn:hover:before{transform:scale(0)}.btn:hover{box-shadow:inset 0 0 25px #86f54e}