html,
        body {
            margin: 0;
            padding: 0;
            background: black;
            overflow: hidden;
        }

        /* sys font */
        @font-face {
            font-family: 'firasanscompressed-regular';
            font-style: normal;
            font-weight: 400;
            src: local('firasanscompressed-regular'), url(firasanscompressed-regular.woff2) format('woff2');
        }

        #fullscreenMask {
            display: none;
        }

        .layer-style-overlay {
            display: -webkit-box;
            display: -ms-flexbox;
            display: flex;
            height: 100%;
            width: 100%;
            -webkit-box-orient: vertical;
            -webkit-box-direction: normal;
            -ms-flex-direction: column;
            flex-direction: column;
            -webkit-box-pack: center;
            -ms-flex-pack: center;
            justify-content: center;
            -webkit-justify-content: center;
            position: fixed;
            -webkit-box-align: center;
            -ms-flex-align: center;
            align-items: center;
            -webkit-align-items: center;
            top: 0px;
            left: 0px;
            background-color: rgba(0, 0, 0, 0.7);
            font: bold 28px Arial, Helvetica, Clean, sans-serif;
            text-align: center;
            text-decoration: none;
            text-shadow: 0 1px 0 #fafafa;
        }

        .layer-game-style {
            display: -webkit-box;
            display: -ms-flexbox;
            display: flex;
            height: 100%;
            width: 100%;
            -webkit-box-orient: vertical;
            -webkit-box-direction: normal;
            -ms-flex-direction: column;
            flex-direction: column;
            -webkit-box-pack: center;
            -ms-flex-pack: center;
            justify-content: center;
            -webkit-justify-content: center;
            -webkit-box-align: center;
            -ms-flex-align: center;
            align-items: center;
            -webkit-align-items: center;
        }

        .layer-swipe-style {
            height: 100%;
            width: 100%;
            background-position: 50% 20%;
            background-repeat: no-repeat;
            background-image: url(swipe.gif);
            background-color: black;
            opacity: 0.5;
        }