Sections

Conditional classes

Stacks provides conditional atomic classes to easily build complex responsive designs, hover states, and print layouts. A limited selection of conditional classes are available throughout Stacks. These are represented in class definitions tables by a green checkmark .

Responsive

Section titled Responsive

Many utility classes in Stacks are also available in screen-size specific variations. For example, the .d-none utility can be applied to small browser widths and below using the .sm:d-none class, on medium browser widths and below using the .md:d-none class, and on large browser widths and below using the .lg:d-none class.

This is done using predefined max-width media query breakpoints represented by t-shirt sizes. A common example would be to apply .md:fd-column to a flex layout. This means, “At the medium breakpoint and smaller, switch the flex layout from columns to rows by applying fd-column.”

Note: Our font size classes, .fs-[x] are automatically adjusted at the smallest breakpoint.

Responsive classes

Section titled Responsive classes

Breakpoint	Classname	Definition
All / Default	`.[x]`	The class is applied on all browser widths.
Large	`.lg:[x]`	The class is applied on large browser widths and below.
Medium	`.md:[x]`	The class is applied on medium browser widths and below.
Small	`.sm:[x]`	The class is applied on small browser widths and below.

Responsive example

Section titled Responsive example

Resize your browser to see which classes are applied.

<div class="d-flex flex__center md:fd-column g16">
    <div class="flex--item wmx3 fs-body3 lg:ta-center">
        …
    </div>
    <div class="flex--item md:order-first sm:d-none">
        <svg>…</svg>
    </div>
</div>

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Hover

Section titled Hover

Stacks provides hover-only atomic classes. By applying .h:bs-lg, .h:o100, and .h:fc-black-900, you’re saying “On hover, add a large box shadow, an opacity of 100%, and a font color of black 900.”

<div class="s-card o80 bs-sm h:bs-lg h:o100 h:fc-black-900"></div>

Example

Focus

Section titled Focus

Stacks provides focus-only atomic classes. By applying .f:o100, and .f:fc-black-900, you’re saying “On focus, add an opacity of 100%, and a font color of black 900.”

<div class="s-card o80 bs-sm f:o100 f:fc-black-900"></div>

Example

Print

Section titled Print

Stacks provides print-only atomic classes. By applying .print:d-none, you’re saying “In print layouts, remove this element from the layout.”

<div class="s-card print:d-none"></div>
<div class="s-card d-none print:d-block"></div>

This element will be removed from the page while printing.

Dark mode

Section titled Dark mode

Stacks provides darkmode-only atomic classes. By applying .d:bg-green-100, you’re saying “In dark mode, apply a background of green 100.”

<div class="bc-yellow-1 bg-yellow-100 d:bg-green-100 d:bc-transparent"></div>

This element will be yellow with a border by default but green without a border in dark mode.

In addition to specific overrides, you can force an element’s colors to be light or dark by applying .theme-dark__forced or .theme-light__forced. This comes in handy when showing users a preview of light or dark interface elements.

<div class="fc-dark bg-yellow-100 ba bc-yellow-1 theme-light__forced"></div>

This element will be rendered with light mode colors regardless of theme preference.