.dev/assets/design-styles/modern/css/blocks/button.scss
/*! Modern: Button */
.wp-block-button__link,
.wp-block-search__button {
overflow: hidden;
&::after {
background-color: currentColor;
bottom: 0;
content: "";
display: block;
height: 10px;
left: var(--go-button--padding--x);
position: absolute;
right: var(--go-button--padding--x);
transform: translateY(100%);
transition: transform 200ms cubic-bezier(0.7, 0, 0.3, 1);
}
&:focus,
&:hover {
&::before {
opacity: 1;
}
&::after {
transform: translateY(0);
}
}
}
.single_add_to_cart_button::after {
display: none !important;
}