File: public/flat-admin/css/plugins/icheck/line/line.css

/* iCheck.js Line skin, black
----------------------------------- */
.icheck_line {
    position: relative;
    display: block;
    margin: 0;
    padding: 5px 15px 5px 38px;
    font-size: 13px;
    line-height: 17px;
    color: #fff;
    background: #000;
    border: none;
    -webkit-border-radius: 3px;
    -moz-border-radius: 3px;
    border-radius: 3px;
    cursor: pointer;
}
    .icheck_line .icheck_line-icon {
        position: absolute;
        top: 50%;
        left: 13px;
        width: 13px;
        height: 11px;
        margin: -5px 0 0 0;
        padding: 0;
        overflow: hidden;
        background: url(line.png) no-repeat;
        border: none;
    }
    .icheck_line.hover,
    .icheck_line:hover {
        background: #444;
    }
    .icheck_line.static:hover,
    .icheck_line.checked {
        background: #000;
    }
        .icheck_line.checked .icheck_line-icon {
            background-position: -15px 0;
        }
    .icheck_line.disabled {
        background: #ccc;
        cursor: default;
    }
        .icheck_line.disabled .icheck_line-icon {
            background-position: -30px 0;
        }
    .icheck_line.checked.disabled {
        background: #ccc;
    }
        .icheck_line.checked.disabled .icheck_line-icon {
            background-position: -45px 0;
        }

/* Retina support */
@media only screen and (-webkit-min-device-pixel-ratio: 1.5),
       only screen and (-moz-min-device-pixel-ratio: 1.5),
       only screen and (-o-min-device-pixel-ratio: 3/2),
       only screen and (min-device-pixel-ratio: 1.5) {
    .icheck_line .icheck_line-icon {
        background-image: url(line@2x.png);
        -webkit-background-size: 60px 13px;
        background-size: 60px 13px;
    }
}