.ptr-button-container,.ptr-form{max-width:30em;margin:0 auto}.ptr-button-container>.ptr-back-btn{color:#fff;background-color:#4a90e2}.ptr-fieldset{padding-bottom:3em}ul.ptr-validation{max-width:30em;background-color:#fff;margin:0 auto}ul.ptr-validation>li.error{color:red}