<button class="btn primary-btn">PRIMARY BUTTON</button>
 <a style="text-decoration: none" href="https://coolors.co"> <button class="btn linked-btn">
         <span class="material-icons">
             link
         </span>
         Click here
     </button></a>
 <button class="btn icon-btn">
     <span class="material-icons">
         shopping_cart
     </span>
     Add to Cart
 </button>
 <button class="btn float-action">
     +
 </button>