Basic styling for the Overlay module.
- 
- /**
-  * @file
-  * Basic styling for the Overlay module.
-  */
- 
- html.overlay-open,
- html.overlay-open body {
-   height: 100%;
-   overflow: hidden;
- }
- 
- #overlay-container,
- .overlay-modal-background,
- .overlay-element {
-   height: 100%;
-   left: 0;
-   position: absolute;
-   top: 0;
-   width: 100%;
-   z-index: 500;
- }
- 
- .overlay-modal-background {
-   /* Using a transparent png renders faster than using opacity */
-   background: transparent url(../images/background.png) repeat;
- }
- 
- .overlay-element {
-   background: transparent;
-   left: -200%;
-   z-index: 501;
- }
- .overlay-element.overlay-active {
-   left: 0;
- }
- 
- html.overlay-open .displace-top,
- html.overlay-open .displace-bottom {
-   z-index: 600;
- }
- 
- /**
-  * Within the overlay parent, the message about disabling the overlay is for
-  * screen-reader users only. It is always kept invisible with the
-  * element-invisible class, and removed from the tab order. Overlay-child.css
-  * contains styling for the same message appearing within the overlay, and
-  * intended for sighted users.
-  */
- #overlay-disable-message {
-   display: none;
- }
- html.overlay-open #overlay-disable-message {
-   display: block;
- }