Add Trust Badge Message Below Add-to-Cart

<?php
if ( ! class_exists( 'WooCommerce' ) ) {
    return;
}
add_action( 'woocommerce_after_add_to_cart_button', 'scseed_wc_trust_message' );
function scseed_wc_trust_message() {
    echo '<p class="scseed-trust-msg" style="font-size:0.85em;margin-top:0.5em;color:#555;">'
        . esc_html__( '30-day money-back guarantee. Secure checkout.', 'textdomain' )
        . '</p>';
}