.qn-App {
  .textShadow();
  border: 0.1em solid @color-Border;
  color: @color-Text--900;
  line-height: 1;
  margin: 5%;

  ::selection {
    background-color: @color-Interactive--150;
  }

  &-error {
    border-top: unit(1/16, em) solid @color-Border;
    padding: 0 1em;
  }

  &-empty {
    background-color: @color-Base--150;
    margin: 0;
    padding: 1em 0;
    text-align: center;
  }

  &-body {
    border-top: unit(1/16, em) solid @color-Border;
    display: flex;
  }

  &-nav {
    min-width: 12em;
  }

  &-content {
    border-left: unit(1/16, em) solid @color-Border;
    flex: 1;
    max-width: 40em;
  }
}

.qn-App {
  .textShadow();
  border: unit(1/16, em) solid @color-Border;
  color: @color-Text--900;
  line-height: 1;
  margin: 5%;

  ::selection {
    background-color: @color-Interactive--150;
  }

  &-error {
    border-top: unit(1/16, em) solid @color-Border;
    padding: 0 1em;
  }

  &-empty {
    background-color: @color-Base--150;
    margin: 0;
    padding: 1em 0;
    text-align: center;
  }

  &-body {
    border-top: unit(1/16, em) solid @color-Border;
    display: flex;
  }

  &-nav {
    min-width: 12em;
  }

  &-content {
    border-left: unit(1/16, em) solid @color-Border;
    flex: 1;
    max-width: 40em;
  }
}

Fix value used for border width
Fix value used for border width
