@namespace url(http://www.w3.org/1999/xhtml);
@-moz-document url-prefix(http://), url-prefix(https://) {

html > body > img:only-child:only-of-type,
html > body > video:only-child:only-of-type,
html > body > audio:only-child:only-of-type {
 position: absolute;
 top: 0;
 left: 0;
 right: 0;
 bottom: 0;
 margin: auto;
 padding: 3px;
}

html > body > img:only-child:only-of-type {
	
	
}

html:hover > body > img:only-child:only-of-type {
	background-image:-moz-repeating-linear-gradient(top,  #ddd, transparent 7px, #ddd 14px),
	                 -moz-repeating-linear-gradient(left, #ddd, transparent 7px, #ddd 14px);
}

html > body:active > img:only-child:only-of-type {
	background-color: #0f0;
}

html > body:hover > img:only-child:only-of-type:hover { 
	background-color: #000;
}

html > body:hover > img:only-child:only-of-type:active { 
	background-color: #f00;
}

}