Стилизация checkbox
<div class="checkbox">
<input id="check1" type="checkbox" name="check" value="check1">
<label for="check1">Checkbox No. 1</label>
<br>
<input id="check2" type="checkbox" name="check" value="check2">
<label for="check2">Checkbox No. 2</label>
</div>
label {
display: inline-block;
cursor: pointer;
position: relative;
padding-left: 25px;
margin-right: 15px;
font-size: 13px;
}
input[type=checkbox] {
display: none;
}
label:before {
content: "";
display: inline-block;
width: 16px;
height: 16px;
margin-right: 10px;
position: absolute;
left: 0;
bottom: 1px;
background-color: #aaa;
box-shadow: inset 0px 2px 3px 0px rgba(0, 0, 0, .3), 0px 1px 0px 0px rgba(255, 255, 255, .8);
border-radius: 3px;
}
input[type=checkbox]:checked + label:before {
content: "\2713";
text-shadow: 1px 1px 1px rgba(0, 0, 0, .2);
font-size: 15px;
color: #f3f3f3;
text-align: center;
line-height: 15px;
}