# box-sizing

https://developer.mozilla.org/en-US/docs/Web/CSS/box-sizing

## border-box
```css
.selector {
  composes: border-box from 'hydrogencss/box-sizing.css'
}
```

or:
```css
.selector {
  composes: border-box from 'hydrogencss/box-sizing/border-box.css'
}
```

## content-box
```css
.selector {
  composes: content-box from 'hydrogencss/box-sizing.css'
}
```

or:
```css
.selector {
  composes: content-box from 'hydrogencss/box-sizing/content-box.css'
}
```