# Bouncing dot radio

> The inner dot pops out from the centre with a little bounce when you pick an option.

- Category: [Radio buttons](https://library.aimran.es/components/radios)
- Built with: HTML + CSS
- Live editor: https://library.aimran.es/blocks/uv-rd-dot
- Library: AIMRAN Library (https://library.aimran.es), free, no sign-up, by Aimran Oukham

## Where to use it

A classic radio button with a bit more life, good for simple either-or choices: how often a newsletter should arrive, daily, weekly or monthly, or how often a fitness app sends reminders. The dot springs into place, so the new choice is obvious. An animated radio button in CSS that still looks familiar to everyone.

Since it stays close to a standard radio, it is a safe pick for long forms and settings pages. Stack the options vertically, as in the demo, when the labels have different lengths.

## Code

### HTML

```html
<div class="uv-rdd"><label><input type="radio" name="rdd" checked><span class="rb"><i></i></span>Daily</label><label><input type="radio" name="rdd"><span class="rb"><i></i></span>Weekly</label><label><input type="radio" name="rdd"><span class="rb"><i></i></span>Monthly</label></div>
```

### CSS

```css
.uv-rdd {
  --c1: #0071e3;
  --c2: #8ec5ff;
  --s: 16px;
  /* tamaño */
  --k: 1;
  /* velocidad */
  --fg: #1d1d1f;
  /* texto */
  --bg: #f5f5f7;
  /* fondo */
}

.uv-rdd {
  font-family: -apple-system,BlinkMacSystemFont,"SF Pro Text","Inter",system-ui,sans-serif;
  font-size: var(--s);
  color: var(--fg);
  -webkit-tap-highlight-color: transparent;
  display: flex;
  flex-direction: column;
  gap: .9em;
}

.uv-rdd label {
  font-family: -apple-system,BlinkMacSystemFont,"SF Pro Text","Inter",system-ui,sans-serif;
  font-size: var(--s);
  color: var(--fg);
  -webkit-tap-highlight-color: transparent;
  display: inline-flex;
  align-items: center;
  gap: .7em;
  cursor: pointer;
  user-select: none;
  font-weight: 500;
}

.uv-rdd input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

.uv-rdd .rb {
  display: grid;
  place-items: center;
  width: 1.4em;
  height: 1.4em;
  border-radius: 50%;
  box-shadow: inset 0 0 0 2px color-mix(in srgb,var(--fg) 22%,transparent);
  transition: box-shadow calc(0.3s / var(--k)) cubic-bezier(.25,.1,.25,1);
}

.uv-rdd i {
  width: .68em;
  height: .68em;
  border-radius: 50%;
  background: var(--c1);
  scale: 0;
  transition: scale calc(0.45s / var(--k)) cubic-bezier(.34,1.56,.64,1);
}

.uv-rdd label:hover .rb {
  box-shadow: inset 0 0 0 2px var(--c1);
}

.uv-rdd input:checked + .rb {
  box-shadow: inset 0 0 0 2px var(--c1);
}

.uv-rdd input:checked + .rb i {
  scale: 1;
}
```

### React

```tsx
import type { CSSProperties } from "react";

const css = `
.uv-rdd {
  font-family: -apple-system,BlinkMacSystemFont,"SF Pro Text","Inter",system-ui,sans-serif;
  font-size: var(--s);
  color: var(--fg);
  -webkit-tap-highlight-color: transparent;
  display: flex;
  flex-direction: column;
  gap: .9em;
}

.uv-rdd label {
  font-family: -apple-system,BlinkMacSystemFont,"SF Pro Text","Inter",system-ui,sans-serif;
  font-size: var(--s);
  color: var(--fg);
  -webkit-tap-highlight-color: transparent;
  display: inline-flex;
  align-items: center;
  gap: .7em;
  cursor: pointer;
  user-select: none;
  font-weight: 500;
}

.uv-rdd input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

.uv-rdd .rb {
  display: grid;
  place-items: center;
  width: 1.4em;
  height: 1.4em;
  border-radius: 50%;
  box-shadow: inset 0 0 0 2px color-mix(in srgb,var(--fg) 22%,transparent);
  transition: box-shadow calc(0.3s / var(--k)) cubic-bezier(.25,.1,.25,1);
}

.uv-rdd i {
  width: .68em;
  height: .68em;
  border-radius: 50%;
  background: var(--c1);
  scale: 0;
  transition: scale calc(0.45s / var(--k)) cubic-bezier(.34,1.56,.64,1);
}

.uv-rdd label:hover .rb {
  box-shadow: inset 0 0 0 2px var(--c1);
}

.uv-rdd input:checked + .rb {
  box-shadow: inset 0 0 0 2px var(--c1);
}

.uv-rdd input:checked + .rb i {
  scale: 1;
}
`;

export default function RdDot() {
  return (
    <>
      <style>{css}</style>
      <div
        style={{
          "--c1": "#0071e3",
          "--c2": "#8ec5ff",
          "--s": "16px",
          "--k": "1",
          "--fg": "#1d1d1f",
          "--bg": "#f5f5f7",
        } as CSSProperties}
      >
        <div className="uv-rdd"><label><input type="radio" name="rdd" checked={true} /><span className="rb"><i></i></span>Daily</label><label><input type="radio" name="rdd" /><span className="rb"><i></i></span>Weekly</label><label><input type="radio" name="rdd" /><span className="rb"><i></i></span>Monthly</label></div>
      </div>
    </>
  );
}
```

## Prompt for AI assistants

Paste this into ChatGPT, Claude, Cursor, v0 or Lovable to adapt the block to your stack (Tailwind, Vue, Svelte…):

````text
I want to add the “Bouncing dot radio” block (Radio buttons) from AIMRAN Library to my project.

## What it is
The inner dot pops out from the centre with a little bounce when you pick an option.

## Chosen settings
- Main color: #0071e3
- Secondary color: #8ec5ff
- Size: 16px (from 12 to 24px)
- Speed: 1x (from 0.5 to 2x)

## What I need
1. Add it to my project with the same look and animation as the reference code: same sizes, colours, radii, shadows, timings and easing.
2. It is built with plain HTML and CSS (the reference wraps it in a React component with its CSS). If my project uses something else (Vue, Svelte, Astro, plain HTML…), translate it without losing any behaviour. If I use Tailwind, turn the styles into classes; if not, keep the CSS in its own file.
3. Expose the settings above as props (or CSS variables) with those values as defaults.
4. Make it work well on phones: nothing that depends only on hover, touch targets of at least 44 px and no overflow on 320 px screens.
5. Make it look right in light and dark mode.
6. Keep it accessible: semantic HTML, roles and aria-* where needed, visible focus and keyboard support.
7. Respect prefers-reduced-motion: with reduced motion, no big animations but the same end result.

## Reference code
```tsx
import type { CSSProperties } from "react";

const css = `
.uv-rdd {
  font-family: -apple-system,BlinkMacSystemFont,"SF Pro Text","Inter",system-ui,sans-serif;
  font-size: var(--s);
  color: var(--fg);
  -webkit-tap-highlight-color: transparent;
  display: flex;
  flex-direction: column;
  gap: .9em;
}

.uv-rdd label {
  font-family: -apple-system,BlinkMacSystemFont,"SF Pro Text","Inter",system-ui,sans-serif;
  font-size: var(--s);
  color: var(--fg);
  -webkit-tap-highlight-color: transparent;
  display: inline-flex;
  align-items: center;
  gap: .7em;
  cursor: pointer;
  user-select: none;
  font-weight: 500;
}

.uv-rdd input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

.uv-rdd .rb {
  display: grid;
  place-items: center;
  width: 1.4em;
  height: 1.4em;
  border-radius: 50%;
  box-shadow: inset 0 0 0 2px color-mix(in srgb,var(--fg) 22%,transparent);
  transition: box-shadow calc(0.3s / var(--k)) cubic-bezier(.25,.1,.25,1);
}

.uv-rdd i {
  width: .68em;
  height: .68em;
  border-radius: 50%;
  background: var(--c1);
  scale: 0;
  transition: scale calc(0.45s / var(--k)) cubic-bezier(.34,1.56,.64,1);
}

.uv-rdd label:hover .rb {
  box-shadow: inset 0 0 0 2px var(--c1);
}

.uv-rdd input:checked + .rb {
  box-shadow: inset 0 0 0 2px var(--c1);
}

.uv-rdd input:checked + .rb i {
  scale: 1;
}
`;

export default function RdDot() {
  return (
    <>
      <style>{css}</style>
      <div
        style={{
          "--c1": "#0071e3",
          "--c2": "#8ec5ff",
          "--s": "16px",
          "--k": "1",
          "--fg": "#1d1d1f",
          "--bg": "#f5f5f7",
        } as CSSProperties}
      >
        <div className="uv-rdd"><label><input type="radio" name="rdd" checked={true} /><span className="rb"><i></i></span>Daily</label><label><input type="radio" name="rdd" /><span className="rb"><i></i></span>Weekly</label><label><input type="radio" name="rdd" /><span className="rb"><i></i></span>Monthly</label></div>
      </div>
    </>
  );
}
```

Give me the complete final code, ready to paste, and tell me in one line where to put it in my project.
````