Starting from v6, neeto-ui supports enhanced customization of components using
CSS variables. These are the variables that are being used in the `Checkbox`
component.

```css
--neeto-ui-checkbox-size: 16px;
--neeto-ui-checkbox-color: rgb(var(--neeto-ui-primary-500));
--neeto-ui-checkbox-border-width: 2px;
--neeto-ui-checkbox-border-color: rgb(var(--neeto-ui-gray-400));
--neeto-ui-checkbox-border-radius: var(--neeto-ui-rounded-sm);

// Disabled
--neeto-ui-checkbox-disabled-opacity: 0.5;

// Hover
--neeto-ui-checkbox-hover-border-color: rgb(var(--neeto-ui-gray-500));

// Focus
--neeto-ui-checkbox-focus-outline: transparent;
--neeto-ui-checkbox-focus-outline-offset: 0px;

// Focus Visible
--neeto-ui-checkbox-focus-visible-outline: 3px solid rgba(var(--neeto-ui-primary-500), 50%);
--neeto-ui-checkbox-focus-visible-outline-offset: 1px;
--neeto-ui-checkbox-focus-visible-box-shadow: none;

// Checked
--neeto-ui-checkbox-checked-border-color: rgb(var(--neeto-ui-primary-500));

// Margin
--neeto-ui-checkbox-label-margin: 8px;

// Label
--neeto-ui-checkbox-label-line-height: 1.2;
```

You can use these variables to customize the component to your liking. Here is
an example:

```css
.neetix-checkbox {
  --neeto-ui-checkbox-color: rgb(var(--neeto-ui-gray-800));
  --neeto-ui-checkbox-focus-visible-outline: 3px solid rgba(var(--neeto-ui-gray-800), 50%);
  --neeto-ui-checkbox-checked-border-color: rgb(var(--neeto-ui-gray-800));
}
```

#### Output
