Style Simple WooCommerce Order Approval pay for this order email link

swoa-email-payment-button.php

<?php

/* https://ptwooplugins.com/product/simple-woocommerce-order-approval/ */
/* Add this to you (child-)theme functions.php file, on a (mu-)plugin or with a plugin like Code Snippets https://wordpress.org/plugins/code-snippets/ */

add_filter( 'woocommerce_email_styles', function( $css ) {
	return $css . '
#swoa-email-payment-button {
	display: inline-block;
	padding: 10px;
	color: #ffffff;
	background-color: #ff6633;
	font-weight: bold;
	text-transform: uppercase;
	text-decoration: none;
	font-size: 1.2em;
}
';
});