doc/themes/quark/scss/theme/_typography.scss

html {
  @include fluid-type($size-xs, $size-xl, $min-responsive-font-size, $html-font-size);
}

// Header Overrides
h1, h2, h3, h4, h5, h6 {
  margin-top: 2rem;
  font-family: $title-font-family;
  color: darken($body-font-color, 10%);
}

h1, .h1 {
  font-size: 3rem;
}

h2, .h2 {
  font-size: 1.8rem;
}

h6, .h6 {
  font-weight: 400;
}

.title-center {
  h1, h2 {
    text-align: center;
  }
}

.title-h1h2 {
  h1  {
    font-weight: 100;
    margin-bottom: 0;
    line-height: 1.1;

    strong, bold {
      font-weight: 400;
    }
  }
  h1 + h2 {
    line-height: 1.1;
    margin-top: 0;
  }

}

// Typography Hints
.title-h1h2, .title-center {
  h1 + h2 {
    margin-bottom: 50px;
    font-weight: 700;
  }
}

a:focus {
  outline: none !important;
  box-shadow: none !important;
}

img {
  max-width: 100%;
}

// Tables
.table > table {
  border-spacing: 0;
  border-collapse: collapse;
  width: 100%;
}


// Codeblocks
pre code, pre.xdebug-var-dump{
  background: #fafafa;
  display: block;
  padding: 1rem !important;
  line-height: 1.5;
  color: inherit;
  border-radius: 2px;
  overflow-x: auto;
}

pre[class*="language-"] {
  code {
    border-radius: inherit;
    padding: 0 !important;
    overflow-x: initial;
  }
}

pre {
  code:not(.hljs):not([class*="language-"]) {
    background: #f8f8f8;
  }
}

// Icon Tweaks
i.fa {


  &.fa-heart, &.fa-heart-o {
    &.pulse {
      color: #920
    }
  }
}

// Font Weights
b,
strong {
  font-weight: 700;
}

.heavy {
  font-weight: 700;
}

.light {
  font-weight: 200;
}

// Colors
.text-light {
  color: rgba($light-color, 0.8);

  h1, h2, h3, h4, h5, h6 {
    color: rgba($light-color, 0.9);
  }
}

// Error configuration
#error {
  text-align: center;
  position: relative;
  margin-top: 5rem;

  .icon {
    font-size: 50px;
  }
}

// Messages
#messages {
  margin-bottom: 1rem;

  .icon {
    font-size: 1rem;
  }
}

// Lists
ul,
ol {
  margin-left: $unit-8;

  ul,
  ol {
    margin-left: $unit-8;
  }
}

ul {
  list-style: disc outside;
}

ol {
  list-style: decimal outside;
}

// Notices
.notices {
  margin: 1.5rem 0;
  p {
    margin: 1rem 0;
  }
}