Html

Code:
<div class="toggle">
  <input type="checkbox" class="check">
  <b class="b switch"></b>
  <b class="b track"></b>
</div>
CSS
Code:
<style>
* {
  margin: 0;
  padding: 0;
  position: relative;
  box-sizing: border-box;
}

html, body
...