.op3-element[data-op3-element-type="fieldset"] {
    // Formula to be used for flex-basis on field element while using
    // flex-direction:row. Flex basis will override width, so the value
    // should be empty for flex-direction:column, or this formula for
    // flex-direction:row. This formula is stored in css and will be
    // set by js (editor).
    //
    // Info:
    // Not using var(--key) in formula, be cause it will be replaced
    // whith actual variable value while trying to retrieve formula
    // with js. Using --key instead, and js will replace it with
    // var(--key).
    --op3-flex-basis-inline-layout-formula:calc((100% - --op3-flex-gap * (--op3-flex-basis-steps - 1)) / --op3-flex-basis-steps * --op3-flex-basis-span + --op3-flex-gap * (--op3-flex-basis-span - 1));
}

.op3-element[data-op3-element-type$="form"] {
    .op3-element[data-op3-element-type="fieldset"] {
        [data-op3-children]:empty,
        [data-op3-children="1"] {
            &::before {
                content: "";
            }

            .op3-element {
                display: block !important;
            }
        }
    }
}