<button class="btn primary-btn">Primary Button</button>
<button class="btn outline-btn">Outlined Button</button>
<button class="btn link-btn no-border">Link</button>
<button class="btn icon-btn no-border">
    <i class="fa fa-tags fa-2x" aria-hidden="true"></i>
</button>
<button class="btn floating-btn no-border">
    <i class="fa fa-chevron-up" aria-hidden="true"></i>
</button>