# Neon radio buttons

> The active option glows with a neon ring, and its label takes on the same colour.

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

## Where to use it

Glowing radios fit dark screens where the setting itself has some energy: the difficulty level of a browser game, the brightness of a smart lamp app or the spice level on a late-night food delivery site. Low, medium or high, the lit option is clear at once. Neon radio buttons in CSS that recolour the label as well.

It pairs well with the neon checkbox from the same collection if you need both in one panel. Just keep the glow for the active state only; if everything shines, nothing stands out.

## Code

### HTML

```html
<div class="uv-rdn"><label><input type="radio" name="rdn" checked><span class="rb"><i></i></span>Low</label><label><input type="radio" name="rdn"><span class="rb"><i></i></span>Medium</label><label><input type="radio" name="rdn"><span class="rb"><i></i></span>High</label></div>
```

### CSS

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

.uv-rdn {
  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: 1em;
}

.uv-rdn 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;
  transition: color calc(0.3s / var(--k)) cubic-bezier(.25,.1,.25,1);
}

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

.uv-rdn .rb {
  display: grid;
  place-items: center;
  width: 1.45em;
  height: 1.45em;
  border-radius: 50%;
  box-shadow: inset 0 0 0 1.6px color-mix(in srgb,var(--fg) 22%,transparent);
  transition: box-shadow calc(0.4s / var(--k)) cubic-bezier(.25,.1,.25,1);
}

.uv-rdn i {
  width: .6em;
  height: .6em;
  border-radius: 50%;
  background: var(--c1);
  scale: 0;
  transition: scale calc(0.45s / var(--k)) cubic-bezier(.34,1.56,.64,1);
}

.uv-rdn input:checked + .rb {
  box-shadow: inset 0 0 0 1.6px var(--c1),0 0 7px var(--c1),0 0 18px color-mix(in srgb,var(--c1) 65%,transparent);
}

.uv-rdn input:checked + .rb i {
  scale: 1;
  box-shadow: 0 0 8px var(--c1);
}

.uv-rdn label:has(input:checked) {
  color: var(--c1);
}
```

### React

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

const css = `
.uv-rdn {
  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: 1em;
}

.uv-rdn 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;
  transition: color calc(0.3s / var(--k)) cubic-bezier(.25,.1,.25,1);
}

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

.uv-rdn .rb {
  display: grid;
  place-items: center;
  width: 1.45em;
  height: 1.45em;
  border-radius: 50%;
  box-shadow: inset 0 0 0 1.6px color-mix(in srgb,var(--fg) 22%,transparent);
  transition: box-shadow calc(0.4s / var(--k)) cubic-bezier(.25,.1,.25,1);
}

.uv-rdn i {
  width: .6em;
  height: .6em;
  border-radius: 50%;
  background: var(--c1);
  scale: 0;
  transition: scale calc(0.45s / var(--k)) cubic-bezier(.34,1.56,.64,1);
}

.uv-rdn input:checked + .rb {
  box-shadow: inset 0 0 0 1.6px var(--c1),0 0 7px var(--c1),0 0 18px color-mix(in srgb,var(--c1) 65%,transparent);
}

.uv-rdn input:checked + .rb i {
  scale: 1;
  box-shadow: 0 0 8px var(--c1);
}

.uv-rdn label:has(input:checked) {
  color: var(--c1);
}
`;

export default function RdNeon() {
  return (
    <>
      <style>{css}</style>
      <div
        style={{
          "--c1": "#0071e3",
          "--c2": "#8ec5ff",
          "--s": "16px",
          "--k": "1",
          "--fg": "#1d1d1f",
          "--bg": "#f5f5f7",
        } as CSSProperties}
      >
        <div className="uv-rdn"><label><input type="radio" name="rdn" checked={true} /><span className="rb"><i></i></span>Low</label><label><input type="radio" name="rdn" /><span className="rb"><i></i></span>Medium</label><label><input type="radio" name="rdn" /><span className="rb"><i></i></span>High</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 “Neon radio buttons” block (Radio buttons) from AIMRAN Library to my project.

## What it is
The active option glows with a neon ring, and its label takes on the same colour.

## 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-rdn {
  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: 1em;
}

.uv-rdn 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;
  transition: color calc(0.3s / var(--k)) cubic-bezier(.25,.1,.25,1);
}

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

.uv-rdn .rb {
  display: grid;
  place-items: center;
  width: 1.45em;
  height: 1.45em;
  border-radius: 50%;
  box-shadow: inset 0 0 0 1.6px color-mix(in srgb,var(--fg) 22%,transparent);
  transition: box-shadow calc(0.4s / var(--k)) cubic-bezier(.25,.1,.25,1);
}

.uv-rdn i {
  width: .6em;
  height: .6em;
  border-radius: 50%;
  background: var(--c1);
  scale: 0;
  transition: scale calc(0.45s / var(--k)) cubic-bezier(.34,1.56,.64,1);
}

.uv-rdn input:checked + .rb {
  box-shadow: inset 0 0 0 1.6px var(--c1),0 0 7px var(--c1),0 0 18px color-mix(in srgb,var(--c1) 65%,transparent);
}

.uv-rdn input:checked + .rb i {
  scale: 1;
  box-shadow: 0 0 8px var(--c1);
}

.uv-rdn label:has(input:checked) {
  color: var(--c1);
}
`;

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