input[type=checkbox].custom-checkbox{appearance:none;-webkit-appearance:none;-moz-appearance:none;width:18px;height:18px;border:2px solid #000;border-radius:3px;cursor:pointer;background-color:#fff;position:relative;outline:none;transition:all .2s ease}input[type=checkbox].custom-checkbox:checked{background-color:#fff;border-color:#000}input[type=checkbox].custom-checkbox:checked:after{content:"✓";position:absolute;color:#000;font-size:14px;font-weight:700;top:50%;left:50%;transform:translate(-50%,-50%);line-height:1}input[type=checkbox].custom-checkbox:active{box-shadow:0 0 0 3px rgba(0,0,0,.1)}input[type=checkbox].custom-checkbox:focus{outline:none;box-shadow:0 0 0 3px rgba(0,0,0,.15)}