style.css Parsing Error

Just in case…

I checked style.css in css validator websites and I got Parsing error for the following code :

/* Fix Flexbox issues for Safari 6.1-10.0 */
@media screen and (min-color-index:0) and(-webkit-min-device-pixel-ratio:0) {
	@media {
		.post-layout-columns .post-wrapper .post-column,
		.widget-magazine-posts .magazine-grid .post-column {
			margin-right: -1px;
		}
	}
}