How to create a vertical "button group" with CSS?

CSS Web Development Front End Technology

Following is the code to produce vertical button group using CSS −

Example

<!DOCTYPE html>
<html>
<style>
*,*::before,*::after{
   box-sizing: border-box;
}
.btnGroup{
   display: inline-block;
   font-size: 0;
   border: 2px solid darkgreen;
   box-shadow: 5px 10px 18px rgb(55, 173, 39);
}
button{
   display: block;
   width: 100%;
   margin:0px;
   border:none;
   padding: 15px;
   font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
   font-weight: bold;
   font-size: 20px;
}
button:not(:last-child){
   border-bottom: 2px solid rgb(6, 134, 49);
}
button:hover{
   background:rgb(48, 24, 134);
   box-shadow: 5px 10px 18px rgb(41, 39, 173);
   color:white;
}
</style>
<body>
<h1>Button Group</h1>
<div class="btnGroup">
<button>Facebook</button>
<button>Twitter</button>
<button>LinkedIn</button>
</div>
<h2>Hover over the above button group to see hover effects</h2>
</body>
</html>