/* 013 */
.button013 a {
    background: #333333;
    position: relative;
    display: flex;
    justify-content: space-around;
    align-items: first baseline;
    margin: 0 auto;
    max-width: 280px;
    padding: 10px 25px;
    color: #00cccc;
    transition: 0.3s ease-in-out;
    font-weight: 500;
    z-index:0;
    border-left: solid 5px #009999;
}
.button013 a:before {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    width: 0;
    display: block;
    background: #009999;
    transition: .3s;
    left:0;
}
.button013 a:hover {
    color: #FFF;
}
.button013 a:hover:before {
    width: 100%;
    z-index: -1;
}