Hi there,
if you’re adding the HTML to the site, then you would be better of adding a CSS class to the <input>
element instead of adding inline styles eg.
<input class="paypal-button" type="image" src="url_obscurred" border="0" name="submit" alt="PayPal - The safer, easier way to pay online!">
Then you can set your styles using CSS:
input.paypal-button {
display: block;
margin: 0;
width: 25%;
}
/* Mobile styles */
@media(max-width: 768px) {
input.paypal-button {
width: 50%;
}
}