.nextend-checkbox-option{
    cursor: pointer;
    padding: 0 5px;
    margin: 0;
    line-height: 22px;
    float: left;
    box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.2) inset, 0 0 2px rgba(0, 0, 0, 0.1);
    background: #e6e9ed; /* Old browsers */
    background: -moz-linear-gradient(top, #ffffff 0%, #e6e9ed 100%); /* FF3.6+ */
    background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#ffffff), color-stop(100%,#e6e9ed)); /* Chrome,Safari4+ */
    background: -webkit-linear-gradient(top, #ffffff 0%,#e6e9ed 100%); /* Chrome10+,Safari5.1+ */
    background: -o-linear-gradient(top, #ffffff 0%,#e6e9ed 100%); /* Opera 11.10+ */
    background: -ms-linear-gradient(top, #ffffff 0%,#e6e9ed 100%); /* IE10+ */
    background: linear-gradient(top, #ffffff 0%,#e6e9ed 100%); /* W3C */
    filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#ffffff', endColorstr='#e6e9ed',GradientType=0 ); /* IE6-9 */    
    border-radius: 3px;
    margin-right: 5px;
    border: 1px solid #A1A7AD;
    color: #68717C; 
    text-shadow: 0 1px 0 #FFFFFF;
}

.nextend-checkbox-option.selected {
    background: #D3efb0;
    box-shadow: 0 1px 3px 1px rgba(0, 0, 0, 0.2) inset, 0 1px 0 rgba(255, 255, 255, 0.6);
}

.nextend-checkbox-option div{
    width: 11px;
    height: 11px;
    background-position: center 1px;
    background-repeat: no-repeat;
}