$typelist: search, reference, cal;
.c-btn {
    background-color: $light-green;
    color: $white;
    padding: 10px 30px;
    position: relative;
    width: 180px;
    cursor: pointer;

    @each $type in $typelist{
        &__#{$type} {
            &::before {
                background-image: url(#{$admin_img_path}icon_#{$type}.png);
            }
        }
    }

    &::before {
        content: '';
        display: inline-block;
        width: 15px;
        height: 15px;
        background-repeat: no-repeat;
        background-size: contain;
        vertical-align: middle;
        left: 15px;
        top: 12px;
        position: absolute;
    }
}