what would be the garden equivalent to adding classes inside classes?:

.tweet-too-long {
  .tweet-button {
    opacity: 0.5;
  }
  .warning-message {
    display: inline-block;
  }
}

@thomasdeutsch: This should work for you.

(css [:.tweet-too-long
      [:.tweet-button {:opacity 0.5}]
      [:.warning-message {:display: "inline-block"}]])