ul.o_checklist {
    > li {
        list-style: none;
        position: relative;
        margin-left: 20px;

        &:not(.oe-nested):before {
            content: '';
            position: absolute;
            left: -20px;
            display: block;
            height: 14px;
            width: 14px;
            top: 1px;
            border: 1px solid;
            cursor: pointer;
        }
        &.o_checked:after {
            content: "✓";
            transition: opacity .5s;
            position: absolute;
            left: -18px;
            top: -1px;
            opacity: 1;
        }
    }
}
