.woocommerce a.button,
.woocommerce button.button,
.woocommerce input.button,
.woocommerce #respond input#submit {
    background-color: #000000; /* Nova boja gumba */
    color: white; /* Boja teksta */
    border: none;
}

.woocommerce a.button:hover,
.woocommerce button.button:hover,
.woocommerce input.button:hover,
.woocommerce #respond input#submit:hover {
    background-color: #dcdcdc; /* Boja na hover */
}