.woo-free-sample-button{
margin-left: 10px;
border: 0;
border-radius: 0;
background: none;
background-color: #333333;
border-color: #333333;
color: #fff;
cursor: pointer;
padding: 0.6180469716em 1.41575em;
text-decoration: none;
font-weight: 600;
text-shadow: none;
display: inline-block;
-webkit-appearance: none;
}
.woo-free-sample-button:hover{
background-color: #1a1a1a;
border-color: #1a1a1a;
color: #ffffff;
}
body .wp-block-woocommerce-add-to-cart-form form.cart {
-ms-grid-columns: min-content min-content min-content;
display: -ms-grid;
display: grid;
grid-auto-flow: column;
grid-template-columns: min-content min-content min-content;
}
@media screen and (max-width: 768px) {
.woo-free-sample-button {
margin: 20px 0;
}  
}