.popup-wrapper { height: 100%; text-align: center; } .popup-wrapper:before { content: ''; height: 100%; line-height: 100%; vertical-align: middle; display: inline-block; }
height: 100%; text-align: center;
content: ''; height: 100%; line-height: 100%; vertical-align: middle; display: inline-block;
display: inline-block;