I need some help. I would like to make to these two divs, participation and benefits, sit side by side each other horizontally, but I can only edit the CSS code. Here's what I have so far:
.supporting {
  padding: 150px;
  margin-bottom: 40px;
  margin-right: 10px;
}
.participation {
  margin: 10px 0px 0px 0px;
  width: 400px;
  height: 400px;
  background-color: lightgray;
  padding: 30px;
  position: relative;
}
#zen-participation {
  clear: both;
  float: left;
  padding-left: 30px;
  padding-top: 10px;
}
.benefits {
  margin: 10px 0px 0px 0px;
  padding: 30px;
  background-color: lightcoral;
  background-repeat: no-repeat;
  position: relative;
  width: 80%;
}
#zen-benefits {
  clear: both;
  float: right;
  width: 30%;
  padding-left: 30px;
  padding-top: 50px;
}
<div class="main supporting" id="zen-supporting" role="main">
  <div class="participation" id="zen-participation" role="article">
    <h3>Participation</h3>
    <p>Strong visual design has always been our focus.....</p>
  </div>
  <div class="benefits" id="zen-benefits" role="article">
    <h3>Benefits</h3>
    <p>Why participate? ...</p>
  </div>
</div>