.piwigomedia-single-image {
}

.piwigomedia-single-image img {
    padding: 4px; 
    border: 1px solid #a0a0a0;
}

ul.piwigomedia-category-preview {
	list-style: none;
	padding: 0;
	text-align: center;
}

ul.piwigomedia-category-preview li {
	display: inline;
}

#sidebar ul.piwigomedia-category-widget {
	width: 100% ! important;
	margin-top: 10px;
}

#sidebar ul.piwigomedia-category-widget li {
        list-style: none ! important;
	float: left !important;
	padding: 0;
	width: 50%;
	border: 0px solid red;
	text-align: center;
}

ul.piwigomedia-category-widget .piwigomedia-single-image img {
    padding: 2px;
    border: 1px solid #a0a0a0;
    max-height: 80px;
}