aekaplan

<div class="container">
  <!-- Your Content -->
</div>

aekaplan

<meta name="viewport" content="width=device-width, initial-scale=1">

aekaplan

<div class="row">
  <div class="column-example">
    <p>Column 1</p>
  </div>
  
  <div class="column-example">
    <p>Column 2</p>
  </div>
  
  <div class="column-example">

aekaplan

.column-example-bad {
  float: left;
  margin-left: 3.2%;
  width: 31.2%;
}

.first {
  border: 1px solid #008080;
  margin-left: 0
}

aekaplan

<div class="row">
  <div class="column-example-bad first">
    <p>Column 1</p>
  </div>
  
  <div class="column-example-bad">
    <p>Column 2</p>
  </div>
  
  <div class="column-example-bad">

aekaplan

.column-example {
  float: left;
  margin-left: 3.2%;
  width: 31.2%;
}

.column-example:first-child {
  border: 1px solid #008080;
  margin-left: 0;
}

aekaplan

.cf:before,
.cf:after {
    content: " ";
    display: table;
}

.cf:after {
    clear: both;
}

aekaplan

ul.example li:before {
   content: "★";
   color: #d31742;
   padding-right: 0.5em;
}

aekaplan

p.example:before {
   background: #d31742;
   content: "before";
   color: #fff;
   padding: 0 0.3em;
}

p.example:after {
   background: #d31742;
   content: "after";

aekaplan

.timeline:before {
    background: #ddd;
    content: " ";
    position: absolute;
    top: 20px;
    left: 31%;
    bottom: 0;
    width: 1px;
}