/* Highlight the WooCommerce "Create an Account" section */
.woocommerce-checkout .woocommerce-account-fields {
    background-color: #fff8e1;
    padding: .5em 1em 1em 1em;
    margin-bottom: 1.5em;
    border: 1px solid #f0ad4e;
    border-radius: 4px;
}