martijnversluis/ChordFiddle

.EditorContainer
  $editor-padding: $spacing-m
  $editor-space-between: $spacing-m

  display: flex
  flex-direction: row
  flex: 1 1 auto
  max-height: 100%
  overflow: hidden

  &__editor
    $border-color: $theme-background

    border-left: 1px $border-color solid
    flex: 1 0 auto

  &__lineNumbers
    $right-padding: 28px
    $scrollbar-correction: 20px
    $width: 65px

    flex: 0 0 ($width + $scrollbar-correction)
    margin-right: -1 * $scrollbar-correction
    padding-right: $right-padding + $scrollbar-correction

  &__errorMessage
    background: red
    margin-top: $editor-space-between
    padding: $editor-padding

    &:empty
      display: none