div.viewport-container {
    position: absolute;
    top: 50px;
    left: 100px;
    z-index: 5;
    display: block;
    box-shadow: 0px 0px 6px 2px rgba(0, 0, 0, 0.14);
    box-sizing: border-box;
    width: 100%;
    height: 100%;
    -webkit-border-radius: 3px;
    -moz-border-radius: 3px;
    border-radius: 3px;
}
iframe.output-frame {
    background: #fff;
    width: 100%;
    height: 100%;
    -webkit-border-radius: 3px;
    -moz-border-radius: 3px;
    border-radius: 3px;
}
div.element-highlight {
    width: 100%;
    height: 100%;
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 2;
    pointer-events: none;
    overflow: hidden;
}
div.highlight {
    /*display: hidden;*/
    position: absolute;
    background-color: yellow;
    opacity: 0.5;
    cursor: default;
    pointer-events: auto;
}