CSS Animation 101

CSS Animation 101 is a tutorial resource that teaches the fundamentals of motion on the web using only CSS. It starts with core building blocks—transitions, transforms, and keyframes—and then layers in timing functions, delays, and choreography to create more expressive sequences. The material stresses clarity and maintainability, showing how to structure styles so animations are easy to reason about and adjust. Throughout, examples demonstrate practical use cases like button feedback, content reveals, loaders, and micro-interactions that enhance user experience without overwhelming it. Performance considerations are discussed, including which properties animate cheaply and how to avoid jank with compositing-friendly transforms. By combining explanation with runnable examples, the resource helps designers and developers develop an intuition for motion that translates directly into everyday interfaces.