Also called Custom Properties., CSS Variables, CSS variables are like storage boxes that hold values (colors, sizes, fonts)., CSS Variables, You create the value once → then reuse it anywhere., CSS Variables, Smooth changes, Transitions, More complex movements, Animations, Used for smooth changes when something happens (like hover)., CSS Transitions, Used for moving, fading, sliding, continuous animation., CSS Animations, The website can automatically switch between: light and dark mode Light mode, Dark/Light Theme Switch, Writing CSS inside another CSS rule — much cleaner and organized., CSS Nesting, Like folders inside folders., CSS Nesting, It lets elements resize based on their container, not the whole screen., Container Queries.

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