# Padlock checkbox

> A padlock icon whose shackle swings open or snaps shut, so locking something really looks like it.

- Category: [Checkboxes](https://library.aimran.es/components/checkboxes)
- Built with: HTML + CSS
- Live editor: https://library.aimran.es/blocks/uv-ck2-lock
- Library: AIMRAN Library (https://library.aimran.es), free, no sign-up, by Aimran Oukham

## Where to use it

A padlock says more than a tick when the option is about privacy: “Make this album private” in a photo app, locking a layer in a design tool or freezing a price in a booking form. Ticked, the lock closes and fills with colour; unticked, the shackle swings open. A lock toggle in HTML and CSS.

Write the label as a state, like “Private” or “Locked”, not as an action, so there is no doubt what the closed padlock means. The icon is drawn with strokes, so it stays sharp at any size.

## Code

### HTML

```html
<label class="uv-ck2l"><input type="checkbox"><span class="bx"><svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round"><path class="sh" d="M8 10V7a4 4 0 0 1 8 0v3"/><rect class="bd" x="5" y="10" width="14" height="10" rx="2.5"/><circle class="kh" cx="12" cy="15" r="1.4" fill="currentColor" stroke="none"/></svg></span>Lock on</label>
```

### CSS

```css
.uv-ck2l {
  --c1: #0071e3;
  --c2: #8ec5ff;
  --s: 16px;
  /* tamaño */
  --k: 1;
  /* velocidad */
  --fg: #1d1d1f;
  /* texto */
  --bg: #f5f5f7;
  /* fondo */
}

.uv-ck2l {
  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-ck2l input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

.uv-ck2l .bx {
  display: grid;
  place-items: center;
  width: 2.1em;
  height: 2.1em;
  border-radius: .6em;
  color: var(--fg);
  background: color-mix(in srgb,var(--fg) 8%,transparent);
  transition: all calc(0.35s / var(--k)) cubic-bezier(.25,.1,.25,1);
}

.uv-ck2l svg {
  width: 1.4em;
  height: 1.4em;
  overflow: visible;
}

.uv-ck2l .sh {
  transform-origin: 16px 10px;
  transition: transform calc(0.5s / var(--k)) cubic-bezier(.34,1.56,.64,1);
}

.uv-ck2l:hover .bx {
  background: color-mix(in srgb,var(--c1) 14%,transparent);
  color: var(--c1);
}

.uv-ck2l input:checked + .bx {
  color: #fff;
  background: var(--c1);
  box-shadow: 0 8px 20px color-mix(in srgb,var(--c1) 35%,transparent);
}

.uv-ck2l input:not(:checked) + .bx .sh {
  transform: rotate(-32deg) translateY(-1px);
}
```

### React

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

const css = `
.uv-ck2l {
  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-ck2l input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

.uv-ck2l .bx {
  display: grid;
  place-items: center;
  width: 2.1em;
  height: 2.1em;
  border-radius: .6em;
  color: var(--fg);
  background: color-mix(in srgb,var(--fg) 8%,transparent);
  transition: all calc(0.35s / var(--k)) cubic-bezier(.25,.1,.25,1);
}

.uv-ck2l svg {
  width: 1.4em;
  height: 1.4em;
  overflow: visible;
}

.uv-ck2l .sh {
  transform-origin: 16px 10px;
  transition: transform calc(0.5s / var(--k)) cubic-bezier(.34,1.56,.64,1);
}

.uv-ck2l:hover .bx {
  background: color-mix(in srgb,var(--c1) 14%,transparent);
  color: var(--c1);
}

.uv-ck2l input:checked + .bx {
  color: #fff;
  background: var(--c1);
  box-shadow: 0 8px 20px color-mix(in srgb,var(--c1) 35%,transparent);
}

.uv-ck2l input:not(:checked) + .bx .sh {
  transform: rotate(-32deg) translateY(-1px);
}
`;

export default function Ck2Lock() {
  return (
    <>
      <style>{css}</style>
      <div
        style={{
          "--c1": "#0071e3",
          "--c2": "#8ec5ff",
          "--s": "16px",
          "--k": "1",
          "--fg": "#1d1d1f",
          "--bg": "#f5f5f7",
        } as CSSProperties}
      >
        <label className="uv-ck2l"><input type="checkbox" /><span className="bx"><svg viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round"><path className="sh" d="M8 10V7a4 4 0 0 1 8 0v3" /><rect className="bd" x="5" y="10" width="14" height="10" rx="2.5" /><circle className="kh" cx="12" cy="15" r="1.4" fill="currentColor" stroke="none" /></svg></span>Lock on</label>
      </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 “Padlock checkbox” block (Checkboxes) from AIMRAN Library to my project.

## What it is
A padlock icon whose shackle swings open or snaps shut, so locking something really looks like it.

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

## 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-ck2l {
  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-ck2l input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

.uv-ck2l .bx {
  display: grid;
  place-items: center;
  width: 2.1em;
  height: 2.1em;
  border-radius: .6em;
  color: var(--fg);
  background: color-mix(in srgb,var(--fg) 8%,transparent);
  transition: all calc(0.35s / var(--k)) cubic-bezier(.25,.1,.25,1);
}

.uv-ck2l svg {
  width: 1.4em;
  height: 1.4em;
  overflow: visible;
}

.uv-ck2l .sh {
  transform-origin: 16px 10px;
  transition: transform calc(0.5s / var(--k)) cubic-bezier(.34,1.56,.64,1);
}

.uv-ck2l:hover .bx {
  background: color-mix(in srgb,var(--c1) 14%,transparent);
  color: var(--c1);
}

.uv-ck2l input:checked + .bx {
  color: #fff;
  background: var(--c1);
  box-shadow: 0 8px 20px color-mix(in srgb,var(--c1) 35%,transparent);
}

.uv-ck2l input:not(:checked) + .bx .sh {
  transform: rotate(-32deg) translateY(-1px);
}
`;

export default function Ck2Lock() {
  return (
    <>
      <style>{css}</style>
      <div
        style={{
          "--c1": "#0071e3",
          "--c2": "#8ec5ff",
          "--s": "16px",
          "--k": "1",
          "--fg": "#1d1d1f",
          "--bg": "#f5f5f7",
        } as CSSProperties}
      >
        <label className="uv-ck2l"><input type="checkbox" /><span className="bx"><svg viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round"><path className="sh" d="M8 10V7a4 4 0 0 1 8 0v3" /><rect className="bd" x="5" y="10" width="14" height="10" rx="2.5" /><circle className="kh" cx="12" cy="15" r="1.4" fill="currentColor" stroke="none" /></svg></span>Lock on</label>
      </div>
    </>
  );
}
```

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