<div class="container">
  <input type="checkbox" name="checks" id="box-1" checked> <label for="box-1">My checkbox is initially checked.</label> <br/>
  <input type="checkbox" name="checks" id="box-2"><label for="box-2">Mine is not.</label> <br/>
  <input type="radio" name="radios" id="radio-1" checked><label for="radio-1">My radio input is initially checked.</label> <br/>
  <input type="radio" name="radios" id="radio-2"><label for="radio-2">Mine is not.</label>
</div>
body {
  color: #555;
  font-size: 1.25em;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

.container {
  margin: 40px auto;
  max-width: 700px;
}