I would like to give: hover on the button "2" by changing the effect on button "1"
<div class="btn um">1</div>
<div class="btn dois">2</div>
<div class="btn tres">3</div>
example:
.um:hover ~ .dois {} (isto funciona)
.dois:hover ~ .um {} ( porem isto não funciona)
I would like to know if you have a hover effect on a previous element