blur_no-alt.css

.block-editor-writing-flow img:is([alt=""],[alt*='.jpg'],[alt*='.png'],[alt*='.gif']) {
	clip-path: inset(0);
	filter: blur(8px);
	outline: 10px solid red;
	outline-offset: -10px;
	transition: filter .125s, outline .125s;
}

.block-editor-writing-flow img:is([alt=""],[alt*='.jpg'],[alt*='.png'],[alt*='.gif']):hover,
.block-editor-writing-flow .wp-block-cover:hover img:is([alt=""],[alt*='.jpg'],[alt*='.png'],[alt*='.gif']),
.block-editor-writing-flow :is(.is-selected,.noalt) img:is([alt=""],[alt*='.jpg'],[alt*='.png'],[alt*='.gif']),
.block-editor-writing-flow img.noalt {
	filter: blur(0px) ; 
	outline: 0;
}
    
/* Media & Text with Image Crop Setting */
/* Selectors must be separate in order to avoid breaking other behavior for older browsers */
.block-editor-writing-flow .wp-block-media-text__media:has(img:is([alt=""],[alt*='.jpg'],[alt*='.png'],[alt*='.gif'])) {
	clip-path: inset(0);
	filter: blur(8px);
	outline: 10px solid red;
	outline-offset: -10px;
	transition: filter .125s, outline .125s;
}

.block-editor-writing-flow .wp-block-media-text:hover .wp-block-media-text__media:has(img:is([alt=""],[alt*='.jpg'],[alt*='.png'],[alt*='.gif'])),
.block-editor-writing-flow .wp-block-media-text.is-selected .wp-block-media-text__media:has(img:is([alt=""],[alt*='.jpg'],[alt*='.png'],[alt*='.gif'])),
.block-editor-writing-flow .wp-block-media-text.noalt .wp-block-media-text__media {
	filter: blur(0px) ; 
	outline: 0;
}