TODO: Describe what buttons are and how they are used in the application.
<button type="button" class="button">Button</button>
<button type="button" class="button button--small">Button Small</button>
<button type="button" class="button button--large">Button Large</button>
<button type="button" class="button button--primary">Button Primary</button>
<button type="button" class="button button--accent">Button Accent</button>
<button type="button" class="button button--small button--primary">Button Small Primary</button>
<button type="button" class="button button--large button--primary">Button Large Primary</button>