<ul id="navigation">
<li><a href="1.html" class="button">1</a></li>
<li><a href="2.html" class="button">2</a></li>
<li><a href="3.html" class="button">3</a></li>
</ul>
.button {
user-select: none;
display: block;
color: inherit;
text-decoration: none
}