catstodon/app/javascript/styles/mastodon/about.scss

$maximum-width: 1235px;
$fluid-breakpoint: $maximum-width + 20px;

.container {
  box-sizing: border-box;
  max-width: $maximum-width;
  margin: 0 auto;
  position: relative;

  @media screen and (max-width: $fluid-breakpoint) {
    width: 100%;
    padding: 0 10px;
  }
}

.brand {
  position: relative;
  text-decoration: none;
}

.rules-list {
  font-size: 15px;
  line-height: 22px;
  color: $primary-text-color;
  counter-reset: list-counter;

  li {
    position: relative;
    border-bottom: 1px solid var(--background-border-color);
    padding: 1em 1.75em;
    padding-inline-start: 3em;
    font-weight: 500;
    counter-increment: list-counter;

    &::before {
      content: counter(list-counter);
      position: absolute;
      inset-inline-start: 0;
      top: 50%;
      transform: translateY(-50%);
      background: $highlight-text-color;
      color: $ui-base-color;
      border-radius: 50%;
      width: 4ch;
      height: 4ch;
      font-weight: 500;
      display: flex;
      justify-content: center;
      align-items: center;
    }

    &:last-child {
      border-bottom: 0;
    }
  }

  &__hint {
    font-size: 14px;
    font-weight: 400;
    color: $darker-text-color;
  }
}