simple custom checkboxes / radios (ie9+)

style.css

input[type=checkbox] {display: none;}

input[type=checkbox] + label:before {  
    content: "";
    border: 1px solid #000;
    font-size: 11px;    
    line-height: 10px;
    margin: 0 5px 0 0;
    height: 10px;
    width: 10px;
    text-align: center;
    vertical-align: middle;
}

input[type=checkbox]:checked + label:before {  
    content: "\2713";
    color: transparent;
    transition: color ease .3s;
}

input[type=checkbox]:checked + label:before {  
    color: #000;
}



input[type=radio] + label:before {  
    content: "\26AB";
    border: 1px solid #000;
    border-radius: 50%;
    font-size: 0;    
    transition: font-size ease .3s;
}
input[type=radio]:checked + label:before {  
    font-size: 10px;    
}