<style>
.injected-text {
margin-bottom: -25px;
text-align: center;
}


.box {
border-style: solid;
border-color: black;
border-width: 5px;
text-align: center;
}


.yellow-box {
background-color: yellow;
padding: 10px;
}


.red-box {
background-color: red;
margin-top: 40px;
margin-right: 20px;
margin-bottom: 20px;
margin-left: 40px;
}


.green-box {
background-color: green;
margin-top:40px;
  margin-right:20px;
  margin-bottom:20px;
  margin-left:40px;

    

    
}
</style>
<h5 class="injected-text">margin</h5>


<div class="box yellow-box">
<h5 class="box red-box">padding</h5>
<h5 class="box green-box">padding</h5>
</div>