Edit in JSFiddle

<ul>                
    <li>
        <input id="cfirst" type="checkbox" name="first" checked hidden />
        <label for="cfirst">Checked checkbox</label>
    </li>
    <li>
        <input id="csecond" type="checkbox" name="second" hidden />
        <label for="csecond">Unchecked checkbox</label>
    </li>
    <li>
        <input id="cthird" type="checkbox" name="third" hidden disabled />
        <label for="cthird">Disabled checkbox</label>
    </li>
    <li>
        <input id="clast" type="checkbox" name="last" checked hidden disabled />
        <label for="clast">Disabled checked checkbox</label>
    </li>
</ul>
<ul>                
    <li>
        <input id="rfirst" type="radio" name="radio" checked hidden />
        <label for="rfirst">Checked radio</label>
    </li>
    <li>
        <input id="rsecond" type="radio" name="radio" hidden />
        <label for="rsecond">Unchecked radio</label>
    </li>
    <li>
        <input id="rthird" type="radio" name="radio" hidden disabled />
        <label for="rthird">Disabled radio</label>
    </li>
</ul>

input[type="checkbox"],
input[type="radio"] {
    display:none;            
}
input[type="checkbox"] + label, 
input[type="radio"] + label {
  font: 18px bold;
  color: #444;
  cursor: pointer;
}
input[type="checkbox"] + label::before,
input[type="radio"] + label::before {
    content: "";
    display: inline-block;
    height: 18px;
    width: 18px;
    margin: 0 5px 0 0;
    background-image: url(http://uniformjs.com/images/sprite.png);
    background-repeat: no-repeat;
}
input[type="checkbox"] + label::before {
    background-position: -38px -260px;    
}
input[type="radio"] + label::before {
    background-position: 0px -279px;
}
input[type="checkbox"]:checked + label::before {
    background-position: -114px -260px;
}
input[type="radio"]:checked + label::before {
    background-position: -108px -279px;
}
input[type="checkbox"]:disabled + label::before {
    background-position: -152px -260px;
}
input[type="checkbox"]:checked:disabled + label::before {
    background-position: -171px -260px;
}
input[type="radio"]:disabled + label::before {
    background-position: -144px -279px;
}
input[type="radio"]:checked:disabled + label::before {
    background-position: -162px -279px;
}