<!-- Primary/ Secondary Button -->
<button class="btn btn-primary">Primary Button</button>
<button class="btn btn-secondary">Secondary Button</button>

<!-- Link Button -->
<button class="btn btn-primary-link">
    <a href="">Primary Link Button</a>
</button>
<button class="btn btn-secondary-link">
    <a href="">Secondary Link Button</a>
</button>

<!-- Icon Button -->
<button class="btn btn-primary-icon btn-flex">
    <span class="material-icons"> account_circle </span>
    Primary Icon Button
</button>
<button class="btn btn-secondary-icon btn-flex">
    <span class="material-icons"> notifications </span>
    Secondary Icon Button
</button>

<!-- Floating Action Button -->
<button class="btn btn-float">
    <span class="material-icons"> add </span>
</button>
<button class="btn btn-float">
    <span class="material-icons"> arrow_upward </span>
</button>