4k.html

<button class="one">
  one
</button>
<button class="one">
Two
</button>
<button class="one">
  Three
</button>
<style>
  .one{background-color:rgb(199, 196, 39);
  color:white;
border:none;
font-size:18px;
font-weight:bold;
padding-top:8px;
padding-bottom:8px;
cursor:pointer;
padding-left:15px;
padding-right:15px;
transition: padding 0.15s,
margin 0.15s;}
.one:hover{
  padding-left:25px;
  padding-right:25px;
  margin-left:10px;
  margin-right:10px;
}
</style>