liquid/_sass/modules/_content-area.scss

.content__item {
  margin-bottom: $spacing-unit * 2;
}

.code-block {
  pre {
    border-radius: 0 0 3px 3px;
    border-top: none;
  }

  &:before {
    padding: 8px 12px;
    display: block;
    box-sizing: border-box;
    font-weight: bold;
    color: $color-white;
    background: $color-blue-5;
    border-bottom: none;
    border-radius: 3px 3px 0 0;
  }
}

.code-block--input {
  &:before {
    content: 'Input';
  }
}

.code-block--output {
  &:before {
    content: 'Output';
  }
}