*{margin:0;padding:0;box-sizing:border-box}body{overflow:hidden}#help{position:absolute;top:0;right:0;background-color:#ffffff4d;padding:10px 15px;font-family:monospace}#help:hover{background-color:#ffffffb3;cursor:pointer}.modal{display:none;position:absolute;width:500px;min-height:50px;top:50%;left:50%;transform:translate(-50%,-50%);background-color:#ffffffe6;padding:10px;font-family:monospace}.modal>.modal-close{margin-top:30px;margin-bottom:10px;text-align:center}#close-button{padding:5px 10px;border:1px solid #ccc}#close-button:hover{background-color:#ccc;cursor:pointer}