Animated underline link
Hover-triggered underline animation using background-size.
CSS animation snippets: transitions, keyframes, scroll-driven animations, and spinners. Every snippet includes a live demo, copyable CSS, and an LLM-ready prompt.
Hover-triggered underline animation using background-size.
CSS-only fade-in animation with @starting-style for element entry.
Scroll-driven reading indicator with animation-timeline: scroll().
A pure CSS loading spinner using keyframes and border, with prefers-reduced-motion support.