zul/src/main/resources/web/zul/less/footer.less

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// For customized style
#footer() {
    .append-style() {
    }
}

@import "~./zul/less/_header.less";

//css flex
.z-flex {
    display: flex;

    & > :not(&-item) {
        flex-shrink: 0;
    }

    &-row {
        flex-direction: row;
    }

    &-column {
        flex-direction: column;
    }

    &-item {
        flex: 1 1 0;
        min-height: 0;
        min-width: 0;
    }
}

#footer.append-style();