.wc-variation-buttons {
    margin: 0px 0;
}

.wc-variation-buttons .variation-btn {
    padding: 0px 15px 0px 15px;
    margin: 5px;
    border: 1px solid #ccc;
    background: #f9f9f9;
    cursor: pointer;
    border-radius: 5px;
    transition: all 0.2s ease;
}

.wc-variation-buttons .variation-btn.active {
    background: #333;
    color: #fff;
    border-color: #333;
}