how to set style of button css code example

Example 1: button style css

<a class="pure-button" href="#">A Pure Button</a>
<button class="pure-button">A Pure Button</button>

Example 2: button style css

<a class="pure-button pure-button-active" href="#">An Active Button</a>
<button class="pure-button pure-button-active">An Active Button</button>