.wp-list-table {
	td.thumb {
		position: relative;

		.thumb_hw_upload_zone {
			position: absolute;
			left: 0; top: 0; right: 0; bottom: 0;
			cursor: pointer;
			text-align: center;
			opacity: 0;
			-moz-opacity: 0;
			background: rgba(0, 0, 0, 0.3) url(../images/icon-upload.png) 50% 50% no-repeat;
			background-size: contain;
			border: 2px dotted #000;
			transition: opacity 0.2s ease;

			&:hover {
				opacity: 1;
				-moz-opacity: 1;
			}

			&.dragenter {
				opacity: 1;
				-moz-opacity: 1;
			}

			&.upload-process {
				opacity: 1;
				-moz-opacity: 1;
				background-image: url(../images/loader.gif);
				background-size: contain;
			}

		}
	}
}