input[type="radio"]:checked + label.chk  {
    background-position: 0 -12px;
}

label.chk {
    font-family: 'CenturyGothicRegular';
    background: url(../images/bg_checkbox.png) no-repeat;
}

label span {
    font-family: 'CenturyGothicRegular';
}