html,body{padding:0;margin:0;height:100%;overflow:hidden;image-rendering:pixelated;display:flex;justify-content:center;align-items:center}#gameContainer{flex-grow:1}canvas{width:100%;background:#fff}.popup{display:flex;position:fixed;z-index:1;left:0;top:0;width:100%;height:100%;overflow:auto;background-color:#000;background-color:#0006;justify-content:center;align-items:center}.popup-content{background-color:#fefefe;padding:20px;border:1px solid #888;width:80%;max-width:500px;max-height:80%;overflow-y:auto;text-align:left}.close-button{color:#aaa;float:right;font-size:28px;font-weight:700}.close-button:hover,.close-button:focus{color:#000;text-decoration:none;cursor:pointer}#tutorialPopup h2,#tutorialPopup h3{font-size:1.5em;margin-top:0}#tutorialPopup p{margin:.5em 0}#tutorialPopup ul{list-style:none;padding:0}#tutorialPopup ul li{margin:.5em 0}