.popup-window button.popup-window-close-icon {
border: 0;
background: transparent;
padding: 0;
cursor: pointer;
}

.popup-window button.popup-window-close-icon .ui-icon-set {
display: none;
}

.popup-window button.popup-window-close-icon:after {
display: block;
position: absolute;
top: 50%;
left: 50%;
transform: translate3d(-50%, -50%, 0);
content: "";
width: 16px;
height: 16px;
background: url('../images/form.close.new.png') no-repeat center / contain;
}

.popup-window span.popup-window-close-icon:after {
display: block;
position: absolute;
top: 50%;
left: 50%;
transform: translate3d(-50%, -50%, 0);
content: "";
width: 16px;
height: 16px;
background: url('../images/form.close.new.png') no-repeat center / contain;
}