.popup{position:fixed;z-index:999;left:0;top:0;width:100%;height:100%;overflow:auto}.popup-content{margin:15% auto;max-width:80%;width:-moz-fit-content;width:fit-content}.popup-header{display:flex;justify-content:space-between;align-items:center}.popup-header h2{margin:0}.popup-header button{background-color:transparent;border:none;cursor:pointer}.popup-body{padding:20px}.popup.show{display:block}