1. CSS outline properties

    The CSS outline properties draw a border around an element that does not affect layout, making it ideal for highlighting. This covers the `outline` shorthand, as well as `outline-width`, `outline-style`, `outline-color` and `outline-offset`.

  2. css property: outline-style

  3. css property: outline-style: auto

  4. css property: outline-style: dashed

  5. css property: outline-style: dotted

  6. css property: outline-style: double

  7. css property: outline-style: groove

  8. css property: outline-style: inset

  9. css property: outline-style: none

  10. css property: outline-style: outset

  11. css property: outline-style: ridge

  12. css property: outline-style: solid