.df-sheet .df-page:before
{
    opacity: .5;
}
section.linkAnnotation a, a.linkAnnotation, .buttonWidgetAnnotation a, a.customLinkAnnotation, .customHtmlAnnotation, .customVideoAnnotation, a.df-autolink
{
    background-color: #ff0;
    opacity: .2;
}
section.linkAnnotation a:hover, a.linkAnnotation:hover, .buttonWidgetAnnotation a:hover, a.customLinkAnnotation:hover, .customHtmlAnnotation:hover, .customVideoAnnotation:hover, a.df-autolink:hover
{
    background-color: #2196f3;
    opacity: .5;
}
.df-container.df-transparent.df-fullscreen
{
    background-color: #eee;
}