CSS with DIV checkbox, the input is not aligned to center of DIV
<p>I have a <code>checkbox</code> that I used in tables and other parts of my web application.</p>

<p>This checkbox is inside a <code>DIV</code> so it has a nicer look and feel.</p>

<p><a href="https://i.stack.imgur.com/XMtKJ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/XMtKJ.png" alt="enter image description here"></a></p>

<p>This is how the checkbox is formed in <code>HTML</code>:</p>

<pre><code>&lt;div class="checkbox checkbox-success checkbox-single"&gt;
   &lt;input type="checkbox"&gt;&lt;label&gt;&lt;/label&gt;
&lt;/div&gt;
</code></pre>

<p>I have detected that when I click in the center of the checkbox it works but If I checked like on the very top left, top right or bottom left it doesn't work.</p>

<p>Then I Inspect the element in <code>Google chrome</code> and found this when I select the <code>input</code> element.</p>

<p><a href="https://i.stack.imgur.com/9RrQE.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/9RrQE.png" alt="enter image description here"></a></p>

<p>That's why it not working because the input element is not centerd to the div.</p>

<p>I'm using Bootstrap 3.</p>

<p>Here are the <code>CSS</code> that I can see in the Google chrome inspector when I select the <code>input</code> element.</p>

<p><a href="https://i.stack.imgur.com/FEGnP.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/FEGnP.png" alt="enter image description here"></a></p>

<p>Here are the <code>CSS</code> that I guess are applyed from my <code>Style.css</code></p>

<pre><code>.checkbox {
  padding-left: 20px;
}
.checkbox label {
  display: inline-block;
  padding-left: 5px;
  position: relative;
}
.checkbox label::before {
  -o-transition: 0.3s ease-in-out;
  -webkit-transition: 0.3s ease-in-out;
  background-color: #ffffff;
  border-radius: 3px;
  border: 1px solid #cccccc;
  content: "";
  display: inline-block;
  height: 17px;
  left: 0;
  margin-left: -20px;
  position: absolute;
  transition: 0.3s ease-in-out;
  width: 17px;
  outline: none !important;
}
.checkbox input[type="checkbox"] {
  cursor: pointer;
  opacity: 0;
  z-index: 1;
  outline: none !important;
}
.checkbox label::after {
  color: #555555;
  display: inline-block;
  font-size: 11px;
  height: 16px;
  left: 0;
  margin-left: -20px;
  padding-left: 3px;
  padding-top: 1px;
  position: absolute;
  top: 0;
  width: 16px;
}
.checkbox.checkbox-single label {
  height: 17px;
}
.checkbox-success input[type="checkbox"]:checked + label::before {
  background-color: #01ba9a;
  border-color: #01ba9a;
}
.checkbox-success input[type="checkbox"]:checked + label::after {
  color: #ffffff;
}
</code></pre>

<p>Here is a <code>CodePen</code> sample, don't show the same exact position but you will see that input is not centered aligned.</p>

<p><a href="http://codepen.io/anon/pen/Jbqapo" rel="nofollow noreferrer">http://codepen.io/anon/pen/Jbqapo</a></p>

<blockquote>
  <p>This is breaking my head, any clue?</p>
</blockquote>