# Gradient border input

> A quiet text field whose border lights up with a spinning two-color gradient while you type.

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

## Where to use it

This input with an animated gradient border is made for the one field that matters most on a page: the prompt box of an AI tool (“Ask anything”), the email field of a launch page or the discount code box at checkout. At rest it has a thin grey frame; on focus, a gradient starts circling the edge.

The motion only runs while the field is active, so it doesn't distract the rest of the time. Even so, one per screen is plenty. In a long form with ten of these, the effect loses its meaning and the page feels restless.

## Code

### HTML

```html
<label class="uv-ig"><input placeholder="Type something"></label>
```

### CSS

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

@property --uv-b {
  syntax: "<angle>";
  inherits: false;
  initial-value: 0deg;
}

.uv-ig {
  font-family: -apple-system,BlinkMacSystemFont,"SF Pro Text","Inter",system-ui,sans-serif;
  display: block;
  width: 16em;
  padding: 2px;
  border-radius: 1em;
  font-size: var(--s);
  background: color-mix(in srgb,var(--fg) 14%,transparent);
  transition: box-shadow calc(0.4s / var(--k)) cubic-bezier(.25,.1,.25,1);
}

.uv-ig input {
  width: 100%;
  box-sizing: border-box;
  height: 3em;
  padding: 0 1em;
  border: 0;
  border-radius: calc(1em - 2px);
  font: inherit;
  color: var(--fg);
  background: var(--bg);
  outline: none;
}

.uv-ig input::placeholder {
  color: color-mix(in srgb,var(--fg) 40%,transparent);
}

.uv-ig:focus-within {
  background: conic-gradient(from var(--uv-b),var(--c1),var(--c2),var(--c1));
  animation: uv-b calc(2.5s / var(--k)) linear infinite;
  box-shadow: 0 8px 28px -12px var(--c1);
}

@keyframes uv-b {
  to {
    --uv-b: 360deg;
  }
}
```

### React

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

const css = `
@property --uv-b {
  syntax: "<angle>";
  inherits: false;
  initial-value: 0deg;
}

.uv-ig {
  font-family: -apple-system,BlinkMacSystemFont,"SF Pro Text","Inter",system-ui,sans-serif;
  display: block;
  width: 16em;
  padding: 2px;
  border-radius: 1em;
  font-size: var(--s);
  background: color-mix(in srgb,var(--fg) 14%,transparent);
  transition: box-shadow calc(0.4s / var(--k)) cubic-bezier(.25,.1,.25,1);
}

.uv-ig input {
  width: 100%;
  box-sizing: border-box;
  height: 3em;
  padding: 0 1em;
  border: 0;
  border-radius: calc(1em - 2px);
  font: inherit;
  color: var(--fg);
  background: var(--bg);
  outline: none;
}

.uv-ig input::placeholder {
  color: color-mix(in srgb,var(--fg) 40%,transparent);
}

.uv-ig:focus-within {
  background: conic-gradient(from var(--uv-b),var(--c1),var(--c2),var(--c1));
  animation: uv-b calc(2.5s / var(--k)) linear infinite;
  box-shadow: 0 8px 28px -12px var(--c1);
}

@keyframes uv-b {
  to {
    --uv-b: 360deg;
  }
}
`;

export default function InGradient() {
  return (
    <>
      <style>{css}</style>
      <div
        style={{
          "--c1": "#0071e3",
          "--c2": "#8ec5ff",
          "--s": "16px",
          "--k": "1",
          "--fg": "#1d1d1f",
          "--bg": "#f5f5f7",
        } as CSSProperties}
      >
        <label className="uv-ig"><input placeholder="Type something" /></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 “Gradient border input” block (Inputs) from AIMRAN Library to my project.

## What it is
A quiet text field whose border lights up with a spinning two-color gradient while you type.

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

## 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 = `
@property --uv-b {
  syntax: "<angle>";
  inherits: false;
  initial-value: 0deg;
}

.uv-ig {
  font-family: -apple-system,BlinkMacSystemFont,"SF Pro Text","Inter",system-ui,sans-serif;
  display: block;
  width: 16em;
  padding: 2px;
  border-radius: 1em;
  font-size: var(--s);
  background: color-mix(in srgb,var(--fg) 14%,transparent);
  transition: box-shadow calc(0.4s / var(--k)) cubic-bezier(.25,.1,.25,1);
}

.uv-ig input {
  width: 100%;
  box-sizing: border-box;
  height: 3em;
  padding: 0 1em;
  border: 0;
  border-radius: calc(1em - 2px);
  font: inherit;
  color: var(--fg);
  background: var(--bg);
  outline: none;
}

.uv-ig input::placeholder {
  color: color-mix(in srgb,var(--fg) 40%,transparent);
}

.uv-ig:focus-within {
  background: conic-gradient(from var(--uv-b),var(--c1),var(--c2),var(--c1));
  animation: uv-b calc(2.5s / var(--k)) linear infinite;
  box-shadow: 0 8px 28px -12px var(--c1);
}

@keyframes uv-b {
  to {
    --uv-b: 360deg;
  }
}
`;

export default function InGradient() {
  return (
    <>
      <style>{css}</style>
      <div
        style={{
          "--c1": "#0071e3",
          "--c2": "#8ec5ff",
          "--s": "16px",
          "--k": "1",
          "--fg": "#1d1d1f",
          "--bg": "#f5f5f7",
        } as CSSProperties}
      >
        <label className="uv-ig"><input placeholder="Type something" /></label>
      </div>
    </>
  );
}
```

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