a.bu-button:hover {
    text-decoration: none;
}

.bu-button.bu-is-success {
    background-color: #23d160;
    border-color: transparent;
    color: #fff;
}

.bu-button.bu-is-success.bu-is-hovered, .bu-button.bu-is-success:hover {
    background-color: #22c65b;
    border-color: transparent;
    color: #fff;
}