wpforms submit button css
div.wpforms-container-full .wpforms-form input[type=submit]:hover,
div.wpforms-container-full .wpforms-form input[type=submit]:active,
div.wpforms-container-full .wpforms-form button[type=submit]:hover,
div.wpforms-container-full .wpforms-form button[type=submit]:active,
div.wpforms-container-full .wpforms-form .wpforms-page-button:hover,
div.wpforms-container-full .wpforms-form .wpforms-page-button:active {
background-color: #ddd; /* Darker grey background */
border: 1px solid #ccc; /* Lighter grey border */
}