WooCommerce Change Buttons via CSS

from https://generatepress.com/forums/topic/how-to-change-woocommerce-buy-button-background-text-color/

All woocommerce related buttons use this CSS:

.woocommerce #respond input#submit, .woocommerce a.button, .woocommerce button.button, .woocommerce input.button {
    color: #fff;
    background-color: #55555e;
}

customize the add to cart button

.woocommerce #respond input#submit, .woocommerce a.button, .woocommerce button.button, .woocommerce input.button {
    color: #fff;
    background-color: #55555e;
    padding: 5px 10px;
    border-radius: 5px;
}

Woo Buttons – ALL buttons round corners:

/* WOO All Buttons round corners */
.woocommerce #content input.button, .woocommerce #respond input#submit, .woocommerce a.button, .woocommerce button.button, .woocommerce input.button, .woocommerce-page #content input.button, .woocommerce-page #respond input#submit, .woocommerce-page a.button, .woocommerce-page button.button, .woocommerce-page input.button {
	border-radius:5px;
}