These classes just do what they say on the tin.
They aren't meant to contain anything, and are set to:

`visibility: hidden;`.

Available spacers include:

• an-gen-spacer-tiny
  - 5px
• an-gen-spacer-small
  - 15px
• an-gen-reduced
  - 25px
• an-gen-spacer
  - 35px
• an-gen-spacer-large
  - 75px
• an-gen-spacer-huge
  - 135px