input[type=checkbox].css-checkbox {
    position: absolute;
    z-index: -1000;
    left: -1000px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    height: 1px;
    width: 1px;
    margin: -1px;
    padding: 0;
    border: 0;
}

    input[type=checkbox].css-checkbox + label.css-label {
        padding-left: 30px;
        height: 25px;
        display: inline-block;
        line-height: 25px;
        background-repeat: no-repeat;
        background-position: 0 0;
        font-size: 15px;
        vertical-align: middle;
        cursor: pointer;
    }

    input[type=checkbox].css-checkbox:checked + label.css-label {
        background-position: 0 -25px;
    }

label.css-label {
    background-image: url(../../Content/images/csscheckbox.png);
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}