.attachment-item{
            position: relative;
            display: inline-block;
            margin-right: 20px;            
}
.preview {
	display: none;
	position: absolute;
	top: -400px;
	left: 100px;
	z-index: 1;
}
        
.item:hover .preview {
	display: block;
	z-index: 2;
}

.preview-img {
	border: none;
	z-index: 1;	
}

.resized-image {
    max-width: 600px;
    max-height: 400px;
    width: auto;
    height: auto;
}