bulma css buttons
<div class="buttons">
<button class="button is-primary">Primary</button>
<button class="button is-link">Link</button>
</div>
<div class="buttons">
<button class="button is-info">Info</button>
<button class="button is-success">Success</button>
<button class="button is-warning">Warning</button>
<button class="button is-danger">Danger</button>
</div>