.woocommerce-product-gallery .flex-control-thumbs .gallery-thumb-hidden {
    display: none !important;
}

.woocommerce-product-gallery .gallery-thumbs-toggle {
    display: block;
    width: fit-content;
    margin: 0;
    font-size: 14px;
    color: #2E5E4E;
    background: #FFF;
    border: solid 1.5px #D9D5CB;
    border-radius: 8px;
}

.woocommerce-product-gallery .gallery-thumbs-toggle:before {
    content: "▦";
    font-size: 14px;
    margin-right: 5px;
}