Base Styles

Defines CSS styles and helper classes.



For text alignment, the .align-left, .align-center, .align-right, and .align-justify classes can be used.

<p class="align-center">This message is so important, it must be centered!</p>

For floating an element on a use case basis, the .float-left, .float-right, and .float-none classes can be used.

<time class="float-right">Feb 26th</time>


To trigger CSS transitions or animations, the .show and .hide classes can be toggled. These classes are automatically handled through conceal() and reveal() within the JavaScript layer.

For implementing a fade transition on an element, set the initial visibility to hidden, opacity to 0, and add the transition properties. Once .show is toggled, fading will occur.

.element {
    visibility: hidden;
    opacity: 0;
    transition: opacity .3s, visibility .3s;
These classes should rarely be modified.

To disable transitions programmatically on an element, add .no-transition to the element.

<div class="element no-transition">Transitions are now disabled.</div>


To mark an element as display block, use .shown, or to hide an element, use .hidden.

<div class="hidden">Can't see this!</div>

To hide an element but make it readable by screen readers, add .sr-only. Can also add .is-focusable to the element to make it revealable.

<div class="sr-only">Only screen readers can see this!</div>


To position an element directly in the center, horizontally and vertically, use .vertical-center. This class requires the parent to have a relative position.

For instances where a parent needs to clear floats dynamically, the .clear-fix class is available.

<div class="clear-fix">
    <div class="float-left">...</div>
    <div class="float-right">...</div>


When an item is marked as disabled, either through the .is-disabled class, or the disabled property, the cursor will be changed to not-allowed.

<button type="button" disabled>Can't touch this!</button>

Or when an element is being dragged, the .is-draggable and .is-dragging classes will apply move and dragging cursors respectively.



Carets are tiny directional arrows used by many components, like Input selects, Drops, and Flyouts. They make use of border styles to create their arrow effect. The following carets exist: .caret-up, .caret-right, .caret-down, and .caret-left.

<a href="#">View More <span class="caret-right"></span></a>


A sorter is a stacking of .caret-up and .caret-down elements to create an ascending and descending sorter, most commonly used in table headers. Applying an .asc or .desc class to the sorter will update styles accordingly.

<span class="sorter asc">
    <span class="caret-up"></span>
    <span class="caret-down"></span>


A character is just that, a character. The only currently supported character is .x, which uses the &times; entity to create X's used in close buttons.

<span class="x"></span>


Bullets are an inline horizontal list that use tiny circles as indicators. A bullet list is used in the Carousel and Showcase for indicating the number of items in the component.

<ol class="bullets">
    <li><a href=""></a></li>
    <li><a href=""></a></li>
    <li><a href=""></a></li>


A .span-* class can be used to force a percentage based width on an element. There are 12 spans, with the lowest span equating to 8.3% and the highest span equating to 100%. These spans are handy when controlling input sizes, or building columns with the Grid component.

<input type="text" class="input span-6" name="name">


Adding dir="rtl" or .rtl to an element will enable RTL reading mode. We suggest adding this attribute to the base <html> tag. Learn more about RTL languages.

<html lang="ar" dir="rtl">

Fluid Media

Supporting inline images and videos within a responsive website can be tedious. To mitigate this issue, Toolkit provides a .fluid class that applies a max-width of 100% with auto-scaling heights.

<img src="/path/to/image.png" class="fluid" alt="">

Furthermore, to support videos and embeds, the .fluid-media wrapper can be used. This will responsively and fluidly display a video in 16:9 aspect ratio.

<div class="fluid-media">
    <iframe src="/path/to/video.ogg" frameborder="0" allowfullscreen></iframe>