How do you manage Cumulative Layout Shift (CLS) with CSS?

CLS is mitigated by explicitly defining dimensions, using aspect-ratio, and reserving space for dynamically loaded content.

Layout shifts happen when elements suddenly resize or move. To prevent this, always set width/height attributes on images, use the aspect-ratio CSS property, or allocate min-height for ad banners and dynamic text blocks so the layout doesn't reflow upon loading.