.ione-commerce-button {
    display: inline-block;
    padding: 10px 25px;
    background: #000;
    color: #fff !important;
    text-transform: uppercase;
    font-weight: bold;
    margin: 5px 0;
    text-decoration: none;
}

.ione-commerce-button:hover {
    background: #272727;
}