Global settings

CoreUI for Bootstrap sets basic global display, typography, and link styles. When more control is needed, check out the textual utility classes.

• Use a native font stack that selects the best font-family for each OS and device.
• For a more inclusive and accessible type scale, we use the browser’s default root font-size (typically 16px) so visitors can customize their browser defaults as needed.
• Use the --cui-body-font-family, --cui-body-font-size, and --cui-body-line-height tokens as our typographic base applied to the <body>.
• Set the global link color via --cui-link-color; the underline and its distance from the text are the --cui-link-decoration and --cui-link-underline-offset tokens.
• Use --cui-bg-body to set a background-color on the <body> — light-dark() picks white or --cui-gray-975, so one value covers both color modes.

These styles can be found within content/_reboot.scss, and the tokens are declared on :root in _root.scss. Set --cui-body-font-size in rem.

Using a custom font

The default is a native font stack, which needs no download and matches the host OS. To use a web font instead, load it and point the two font tokens at it — no Sass compilation involved.

Add the font to your <head>, before CoreUI’s CSS:

<link rel="preconnect" href="https://fonts.googleapis.com">
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
<link href="https://fonts.googleapis.com/css2?family=Inter:[email protected]&display=swap" rel="stylesheet">

Then override the tokens, in a <style> tag or your own stylesheet:

:root {
  --cui-font-sans-serif: "Inter", system-ui, sans-serif;
  --cui-font-mono: "JetBrains Mono", ui-monospace, monospace;
}

Keep the generic families at the end of each stack: they are what renders while the web font loads, and what renders if it fails.

--cui-body-font-family reads --cui-font-sans-serif, so setting the stack covers the body and everything inheriting from it. Set --cui-body-font-family directly only when you want the body to differ from the rest.

Headings

All HTML headings, <h1> through <h6>, are available.

<h1>h1. CoreUI heading</h1>
<h2>h2. CoreUI heading</h2>
<h3>h3. CoreUI heading</h3>
<h4>h4. CoreUI heading</h4>
<h5>h5. CoreUI heading</h5>
<h6>h6. CoreUI heading</h6>

.h1 through .h6 classes are also available, for when you want to match the font styling of a heading but cannot use the associated HTML element.

<p class="h1">h1. CoreUI heading</p>
<p class="h2">h2. CoreUI heading</p>
<p class="h3">h3. CoreUI heading</p>
<p class="h4">h4. CoreUI heading</p>
<p class="h5">h5. CoreUI heading</p>
<p class="h6">h6. CoreUI heading</p>

Customizing headings

Use the included utility classes to recreate the small secondary heading text from CoreUI 3.

<h3>
  Fancy display heading
  <small class="fg-2">With faded secondary text</small>
</h3>

Display headings and lead text

.display-1 … .display-6 and .lead are gone. Both were fixed sizes and a fixed weight, so they are composed from the font size, font weight and line height utilities instead — .fs-6xl and .fs-5xl are the sizes the two largest display headings used, and a lead paragraph is .fs-lg .fw-light:

<h1 class="fs-6xl fw-light lh-1">Display heading</h1>
<p class="fs-lg fw-light">This is a lead paragraph. It stands out from regular paragraphs.</p>

Inline text elements

Styling for common inline HTML5 elements.

<p>You can use the mark tag to <mark>highlight</mark> text.</p>
<p><del>This line of text is meant to be treated as deleted text.</del></p>
<p><s>This line of text is meant to be treated as no longer accurate.</s></p>
<p><ins>This line of text is meant to be treated as an addition to the document.</ins></p>
<p><u>This line of text will render as underlined.</u></p>
<p><small>This line of text is meant to be treated as fine print.</small></p>
<p><strong>This line rendered as bold text.</strong></p>
<p><em>This line rendered as italicized text.</em></p>

Beware that those tags should be used for semantic purpose:

• <mark> represents text which is marked or highlighted for reference or notation purposes.
• <small> represents side-comments and small print, like copyright and legal text.
• <s> represents element that are no longer relevant or no longer accurate.
• <u> represents a span of inline text which should be rendered in a way that indicates that it has a non-textual annotation.

If you want to style your text, you should use the following classes instead:

• .mark will apply the same styles as <mark>.
• .small will apply the same styles as <small>.
• .text-decoration-underline will apply the same styles as <u>.
• .text-decoration-line-through will apply the same styles as <s>.

While not shown above, feel free to use <b> and <i> in HTML5. <b> is meant to highlight words or phrases without conveying additional importance, while <i> is mostly for voice, technical terms, etc.

Text utilities

Change text alignment, transform, style, weight, line-height, decoration and color with our text utilities and color utilities.

Abbreviations

Stylized implementation of HTML’s <abbr> element for abbreviations and acronyms to show the expanded version on hover. Abbreviations have a default underline and gain a help cursor to provide additional context on hover and to users of assistive technologies.

Add .initialism to an abbreviation for a slightly smaller font-size.

<p><abbr title="attribute">attr</abbr></p>
<p><abbr title="HyperText Markup Language" class="initialism">HTML</abbr></p>

Blockquotes

For quoting blocks of content from another source within your document. Wrap <blockquote class="blockquote"> around any HTML as the quote.

<blockquote class="blockquote">
  <p>A well-known quote, contained in a blockquote element.</p>
</blockquote>

Naming a source

The HTML spec requires that blockquote attribution be placed outside the <blockquote>. When providing attribution, wrap your <blockquote> in a <figure> and use a <figcaption> or a block level element (e.g., <p>) with the .blockquote-footer class. Be sure to wrap the name of the source work in <cite> as well.

<figure>
  <blockquote class="blockquote">
    <p>A well-known quote, contained in a blockquote element.</p>
  </blockquote>
  <figcaption class="blockquote-footer">
    Someone famous in <cite title="Source Title">Source Title</cite>
  </figcaption>
</figure>

Nested

A quote inside a quote keeps the same spacing, because the outer quote lays its children out with --cui-blockquote-gap rather than each child’s own margin.

<blockquote class="blockquote">
  <p>A well-known quote, contained in a blockquote element.</p>
  <blockquote class="blockquote">
    <p>A quote inside the quote above.</p>
  </blockquote>
</blockquote>

Alignment

Use text utilities as needed to change the alignment of your blockquote.

<figure class="text-center">
  <blockquote class="blockquote">
    <p>A well-known quote, contained in a blockquote element.</p>
  </blockquote>
  <figcaption class="blockquote-footer">
    Someone famous in <cite title="Source Title">Source Title</cite>
  </figcaption>
</figure>

<figure class="text-end">
  <blockquote class="blockquote">
    <p>A well-known quote, contained in a blockquote element.</p>
  </blockquote>
  <figcaption class="blockquote-footer">
    Someone famous in <cite title="Source Title">Source Title</cite>
  </figcaption>
</figure>

Lists

Unstyled

Remove the default list-style and left margin on list items (immediate children only). This only applies to immediate children list items, meaning you will need to add the class for any nested lists as well.

<ul class="list-unstyled">
  <li>This is a list.</li>
  <li>It appears completely unstyled.</li>
  <li>Structurally, it's still a list.</li>
  <li>However, this style only applies to immediate child elements.</li>
  <li>Nested lists:
    <ul>
      <li>are unaffected by this style</li>
      <li>will still show a bullet</li>
      <li>and have appropriate left margin</li>
    </ul>
  </li>
  <li>This may still come in handy in some situations.</li>
</ul>

Inline

Remove a list’s bullets and apply some light margin with a combination of two classes, .list-inline and .list-inline-item.

<ul class="list-inline">
  <li class="list-inline-item">This is a list item.</li>
  <li class="list-inline-item">And another one.</li>
  <li class="list-inline-item">But they're displayed inline.</li>
</ul>

Description list alignment

Align terms and descriptions horizontally by using our grid system’s predefined classes (or semantic mixins). For longer terms, you can optionally add a .text-truncate class to truncate the text with an ellipsis.

<dl class="row">
  <dt class="col-sm-3">Description lists</dt>
  <dd class="col-sm-9">A description list is perfect for defining terms.</dd>

  <dt class="col-sm-3">Term</dt>
  <dd class="col-sm-9">
    <p>Definition for the term.</p>
    <p>And some more placeholder definition text.</p>
  </dd>

  <dt class="col-sm-3">Another term</dt>
  <dd class="col-sm-9">This definition is short, so no extra paragraphs or anything.</dd>

  <dt class="col-sm-3 text-truncate">Truncated term is truncated</dt>
  <dd class="col-sm-9">This can be useful when space is tight. Adds an ellipsis at the end.</dd>

  <dt class="col-sm-3">Nesting</dt>
  <dd class="col-sm-9">
    <dl class="row">
      <dt class="col-sm-4">Nested definition list</dt>
      <dd class="col-sm-8">I heard you like definition lists. Let me put a definition list inside your definition list.</dd>
    </dl>
  </dd>
</dl>

Responsive font sizes

Headings scale with the viewport: the larger sizes are written as clamp(), so they grow with the screen up to the size given as the ceiling and stop there.

The same sizes are on :root as --cui-font-size-* tokens, one per stop of the $font-sizes scale, and reachable as font size utilities — .fs-xs through .fs-6xl, or .text-* for the size plus the leading that belongs to it. Use them to give a non-heading element a heading’s size without also giving it a heading’s weight.

Customizing

CSS variables

Headings, paragraphs, lists and the rest of the type Reboot styles read their spacing and weight from :root, so a subtree can be retyped without touching a single class:

$reboot-tokens: defaults(
  (
    --cui-paragraph-margin-bottom: var(--cui-spacer),
    --cui-heading-margin-bottom: var(--cui-spacer-3),
    --cui-heading-font-family: inherit,
    --cui-heading-font-style: inherit,
    --cui-heading-font-weight: var(--cui-font-weight-medium),
    --cui-heading-line-height: 1.2,
    --cui-sub-sup-font-size: .75em,
    --cui-hr-margin-y: var(--cui-spacer),
    --cui-hr-color: inherit,
    --cui-hr-border-width: var(--cui-border-width),
    --cui-hr-opacity: .25,
    --cui-legend-margin-bottom: var(--cui-spacer-3),
    --cui-legend-font-size: clamp(1.275rem, 1.275rem + .3vw, 1.5rem),
    --cui-legend-font-weight: inherit,
    --cui-list-padding-x: 2rem,
    --cui-dt-font-weight: var(--cui-font-weight-bold),
    --cui-initialism-font-size: var(--cui-small-font-size),
    --cui-code-font-size: var(--cui-small-font-size),
    --cui-pre-color: inherit,
  ),
  $reboot-tokens
);

Blockquotes carry their spacing, size and source colour as CSS variables, on the quote and on its footer separately — the footer is a sibling of the quote, not a child, so it cannot read anything declared on it.

$blockquote-tokens: defaults(
  (
    --cui-blockquote-margin-y: var(--cui-spacer),
    --cui-blockquote-gap: var(--cui-spacer),
    --cui-blockquote-font-size: calc(var(--cui-body-font-size) * 1.25),
  ),
  $blockquote-tokens
);

$blockquote-footer-tokens: defaults(
  (
    --cui-blockquote-footer-margin-y: var(--cui-spacer),
    --cui-blockquote-footer-color: var(--cui-fg-3),
    --cui-blockquote-footer-font-size: var(--cui-small-font-size),
  ),
  $blockquote-footer-tokens
);

An inline list carries the gap between its items, declared on the list so one value spaces the whole row:

$list-inline-tokens: defaults(
  (
    --cui-list-inline-padding: .5rem,
  ),
  $list-inline-tokens
);

Sass mixins

There are no dedicated mixins for typography. Fluid sizes are plain clamp() values in the heading and display variables.