1. CSS Environment Variables env()

    Usage of environment variables like `safe-area-inset-top`.

  2. types: `env()`

  3. types: `env()`: safe area inset variable `safe-area-inset-bottom`

  4. types: `env()`: safe area inset variable `safe-area-inset-left`

  5. types: `env()`: safe area inset variable `safe-area-inset-right`

  6. types: `env()`: safe area inset variable `safe-area-inset-top`

  7. types: `env()`: window controls overlay variable `titlebar-area-height`

  8. types: `env()`: window controls overlay variable `titlebar-area-width`

  9. types: `env()`: window controls overlay variable `titlebar-area-x`

  10. types: `env()`: window controls overlay variable `titlebar-area-y`