How to make contact form full width?

You can add this css into style.css at the bottom for fullwidth contact form:

span.wpcf7-form-control-wrap {
    width: 100%;
    display: block;
}
.wpcf7-form-control.wpcf7-text, .wpcf7-form-control.wpcf7-textarea {
    width: 100%;
}