message: refactor(docs-infra): clean up styles in `_card.scss`
  This commit cleans up the styles in `_card.scss` by:
  Fixing incosistenct indentation/newlines.
  Removing rules for unused selectors.
  Removing unnecessary styles.
  PR Close
diff: }
  &:hover {
  - text-decoration: none;
  -
  section {
  color: $blue;
  }
  - p {
  - color: $darkgray;
  - padding: 0 16px;
  - }
  -
  .card-footer {
  - @include line-height(32);
  - padding: 8px 16px;
  background-color: rgba($blue, 0.1);
  color: $blue;
  }
  @include font-size(13);
  }
  }
  -
  - .card-footer.center {
  - text-align: center;
  - }
  }
  }
  button {
  text-align: center;
  }
  -
  }
  