Tandem Button

Install

Or by hand, in a Next.js project with shadcn set up. It writes components/pastetaste/tandem-button.tsx.

Install the pastetaste component "Tandem Button" (tandem-button) into this Next.js project and use it.

What it is: A call to action whose label and icon move together, in three motions: a knob floods the pill, a detached arrow chip is swallowed as the letters roll, or letters flicker in the accent as a plus turns.

Before you place it, ask me (one short message, in my language; "skip" = sensible default): which page and section it goes in, my brand colour (hex), the text, labels or images it should show, and whether I want my logo or my own copy in the demo content. Then:

Steps:
1. If the project has no components.json, run: npx shadcn@latest init -y -d. Then run: npx shadcn@latest add https://pastetaste.com/r/tandem-button.json
   (it writes components/pastetaste/tandem-button.tsx; install any npm packages it reports).
2. Import it: import { TandemButton } from "@/components/pastetaste/tandem-button" (check the file for the exact named export).
3. Put it where it fits on the page I name, keep the rest of the page untouched, and pass props for my colours instead of editing the installed file.
4. It does not depend on Tailwind; colours come from CSS variables (--pt-*) or props.
5. It supports prefers-reduced-motion with a still state; do not remove it.

Props (all optional unless the type has no default):
- children: string — The label. A plain string: letters are animated one by one and screen readers read the whole label once.
- effect: 'flood' | 'dock' | 'flicker' = 'dock' — flood: an accent knob spreads across the outlined pill. dock: the pill swallows a detached arrow chip and the letters roll. flicker: a squared box whose letters flash in the accent while the plus turns.
- icon: ReactNode = arrow (flood, dock) / plus (flicker) — Replaces the default icon; about 1.15em. In dock it is turned 45 degrees at rest.
- accent: string = var(--pt-accent, #dc3b0c) — The colour that moves. flood: knob and flood. dock: pill and chip. flicker: flashing letters and plus. The default passes 4.5:1 under white text.
- ink: string = var(--pt-ink, #161513) — flood: outline and resting label. flicker: label, plus and cell. Also the focus ring (dock uses the accent).
- surface: string = '#ffffff' / '#ffffff' / '#e5e1d8' — flood: the pill at rest and the label on the flood. dock: label and arrow on the accent. flicker: the box.
- size: 'sm' | 'md' | 'lg' | 'xl' = 'md' — Height 40, 48, 58 or 68 px; type, padding and the chip gap scale with it.
- active: boolean = false — Forces the engaged state, e.g. while the whole parent card is hovered. Pointer, keyboard focus and touch still engage it when false.
- href: string — Renders an <a> instead of a <button>; every other anchor or button attribute passes through.

Live preview: https://pastetaste.com/c/tandem-button
Then run the dev server, check it in the browser at desktop and mobile width, and tell me the page URL.

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