<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>