philomena/assets/css/elements/_heading.scss

@mixin heading($el) {
  #{$el} {
    font-size: var(--font-#{$el}-size);
    font-weight: bold;
    font-variant: small-caps;
    padding: var(--padding-small) 0;
    margin-top: 0;
    border-bottom: 1px solid var(--primary-border-color);
  }
}

@mixin heading-type($type) {
  .heading--#{$type} {
    border-bottom-color: var(--#{$type}-border-color);
  }

  .block--#{$type} {
    h1, h2, h3, h4, h5, h6 {
      border-bottom-color: var(--#{$type}-border-color);
    }
  }
}

@include heading(h1);
@include heading(h2);
@include heading(h3);
@include heading(h4);
@include heading(h5);
@include heading(h6);

/* To differentiate between h5 and h6, simply make h6 not bold */
h6 {
  font-weight: normal;
}

@include heading-type(success);
@include heading-type(warning);
@include heading-type(danger);
@include heading-type(information);
@include heading-type(purple);