Order Confirmation Page - Text all congested

Site URL: http://www.chalkvscheese.com

Hi, I've just been told by a customer that the confirmation page after they checked out didn't look quite right (see screen shot attached). It appears it was only on their phone. Can you advise why this is the case? 

Try adding to Design > Custom CSS

@media screen and (max-width:767px) {
div#confirmed-page p {
    line-height: 2.5em !important;
}
}