uk-button

<p>
<a href="http://kyou.conf.jp/" 
class="uk-button uk-button-danger uk-button-small">
minakami link test</a>
</p>

.uk-button-mini
.uk-button-small 
.uk-button-large

.uk-button-primary 
.uk-button-success 
.uk-button-danger
.uk-button-link

<button class="uk-button uk-width-1-1 uk-margin-small-bottom">test</button>

<div class="uk-container uk-container-center uk-margin-large-bottom">
<p> <a class="uk-button" href="">Link</a>
<button class="uk-button" type="button">Button</button>
<button class="uk-button uk-button-primary" type="button" data-uk-button>Button1</button>
</p>

preview