CSS-Responsive-Exercises Responsive Units we already know rem, em vw, vh % we also know we can calculate with them: calc(100% - 2rem + 15vh) Media Queries you might want to know about width: 600px / min-width / max-width aspect-ratio: 4/3 / min-aspect-ratio / max-aspect-ratio orientation : landscape, portrait resolution: 150dpi / min-resolution / max-resolution prefers-color-scheme: dark, light prefers-reduced-motion prefers-contrast: no-preference, more, less any-pointer: none, coarse, fine Links to inform yourself Responsive Design Beginners Guide to Media Queries Using Media Queries Responsive Images Picture Element