A header that gets out of the way: it tightens and frosts once you start scrolling, slides away while you read down, and bounces back the moment you scroll up, with a hairline at its bottom edge showing how far through the page you are.
Direction comes from the delta between rAF frames with a 6 px dead zone, so trackpad jitter never toggles it. Hide: `transform: translateY(-110%)` 260 ms ease-in; show: 520 ms `cubic-bezier(.34,1.56,.64,1)` (overshoots ~6 px). Height and background transition 220 ms between top and compact. Focus inside the header always shows it.
From prompt to a block in your page.
The preview is the shipped block inside a neutral demo page. Scroll, hover, drag: everything is live.
Token sets re-tint the block live. The prompt carries the one you chose.
A paste-in snippet, or a component for Next.js, React, Vue, Astro, WordPress, Shopify or Webflow.
It quotes the block's markup, styles and script verbatim with the tokens and the rules that keep it self-contained.
Add the head lines it names, paste the block, replace the placeholder copy. Tokens live on :root.