### Install Development Dependencies

Source: https://github.com/pestphp/pest-plugin-browser/blob/4.x/CONTRIBUTING.md

Installs the necessary development dependencies for the Pest Plugin Browser project using Composer.

```bash
composer install
```

--------------------------------

### Run All Tests

Source: https://github.com/pestphp/pest-plugin-browser/blob/4.x/CONTRIBUTING.md

Executes all tests for the Pest Plugin Browser project.

```bash
composer test
```

--------------------------------

### Run Unit Tests

Source: https://github.com/pestphp/pest-plugin-browser/blob/4.x/CONTRIBUTING.md

Executes only the unit tests for the Pest Plugin Browser project.

```bash
composer test:unit
```

--------------------------------

### Check Types

Source: https://github.com/pestphp/pest-plugin-browser/blob/4.x/CONTRIBUTING.md

Performs type checking on the project's code.

```bash
composer test:types
```

--------------------------------

### Lint Code

Source: https://github.com/pestphp/pest-plugin-browser/blob/4.x/CONTRIBUTING.md

Runs the code linting process to ensure adherence to coding style standards.

```bash
composer lint
```

--------------------------------

### Responsive Browser Test CSS

Source: https://github.com/pestphp/pest-plugin-browser/blob/4.x/tests/Fixtures/responsive.html

Provides the CSS styles for a responsive browser test layout. It defines variables for colors and radius, sets up box-sizing, styles the body, header, hero section (including image hover effects and layout adjustments for different screen sizes), call-to-action buttons, and footer. Media queries are used to adapt the layout for tablet and desktop views.

```css
:root {
  --bg-light: #f5f5f7;
  --text-dark: #1d1d1f;
  --accent: #0071e3;
  --radius: 20px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-light);
  color: var(--text-dark);
  line-height: 1.5;
}

header {
  padding: 2rem 1rem;
  text-align: center;
}

header h1 {
  font-size: 2.5rem;
  font-weight: 600;
}

.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3rem 1rem;
  text-align: center;
}

.hero img {
  max-width: 100%;
  border-radius: var(--radius);
  margin-top: 2rem;
  transition: transform 0.3s ease;
}

.hero img:hover {
  transform: scale(1.03);
}

.cta {
  margin-top: 2rem;
}

.cta a {
  display: inline-block;
  background: var(--accent);
  color: white;
  padding: 0.8rem 1.5rem;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 500;
  transition: background 0.3s;
}

.cta a:hover {
  background: #005bb5;
}

footer {
  padding: 2rem 1rem;
  text-align: center;
  font-size: 0.9rem;
  color: #888;
}

@media (min-width: 768px) {
  .hero {
    flex-direction: row;
    text-align: left;
  }
  .hero-content {
    flex: 1;
    padding-right: 2rem;
  }
  .hero img {
    flex: 1;
    margin-top: 0;
  }
}

@media (min-width: 1024px) {
  header h1 {
    font-size: 4rem;
  }
  .cta a {
    font-size: 1.2rem;
  }
}
```

=== COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.