.page-tool--nested-data-flattener .tool-page {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.page-tool--nested-data-flattener .tool-header__summary code {
    padding: 0.05rem 0.3rem;
    border-radius: var(--radius-xs);
    background: var(--surface-3);
    color: var(--ink-2);
    font-family: var(--font-mono);
}

.page-tool--nested-data-flattener .ndf-options__body {
    display: flex;
    flex-wrap: wrap;
    gap: 14px 18px;
    align-items: flex-end;
}

.page-tool--nested-data-flattener .ndf-options__body .field {
    flex: 0 1 220px;
}

.page-tool--nested-data-flattener .ndf-options__body .ndf-options__direction {
    flex: 0 1 260px;
}

.page-tool--nested-data-flattener .ndf-options__body [hidden] {
    display: none !important;
}

.page-tool--nested-data-flattener .ndf-options__help {
    flex: 1 1 100%;
    margin: 0;
    color: var(--muted);
    font-size: 0.82rem;
    line-height: 1.5;
}

.page-tool--nested-data-flattener .ndf-options__help strong {
    color: var(--ink-2);
}

.page-tool--nested-data-flattener .ndf-options__help code {
    padding: 0.05rem 0.3rem;
    border-radius: var(--radius-xs);
    background: var(--surface-3);
    color: var(--ink-2);
    font-family: var(--font-mono);
}

.page-tool--nested-data-flattener .ndf-workspace {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 16px;
    align-items: stretch;
}

.page-tool--nested-data-flattener .ndf-pane {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.page-tool--nested-data-flattener .ndf-pane__body {
    display: flex;
    flex-direction: column;
    flex: 1 1 auto;
    min-height: 0;
}

.page-tool--nested-data-flattener .ndf-textarea {
    display: block;
    flex: 1 1 auto;
    min-height: 26rem;
    padding: 14px 16px;
    border: 0;
    border-radius: 0;
    background: var(--surface);
    font-family: var(--font-mono);
    font-size: 0.82rem;
    line-height: 1.6;
    resize: vertical;
}

.page-tool--nested-data-flattener .ndf-textarea:focus {
    box-shadow: none;
}

.page-tool--nested-data-flattener .ndf-hint {
    margin: 0;
    color: var(--muted);
    font-size: 0.8rem;
}

.page-tool--nested-data-flattener .ndf-hint--note {
    padding: 11px 16px;
    border-top: 1px solid var(--line);
    background: var(--surface-2);
}

.page-tool--nested-data-flattener .ndf-status {
    min-height: 0;
    margin: 0;
    padding: 11px 16px;
    border-bottom: 1px solid var(--line);
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--muted);
}

.page-tool--nested-data-flattener .ndf-status.status {
    margin: 0;
    border: 0;
    border-bottom: 1px solid var(--line);
    border-radius: 0;
    background: transparent;
}

.page-tool--nested-data-flattener .ndf-status.status--error {
    background: var(--danger-soft);
    color: var(--danger);
}

.page-tool--nested-data-flattener .ndf-status.status--success {
    background: var(--success-soft);
    color: var(--success);
}

.page-tool--nested-data-flattener .ndf-output {
    flex: 1 1 auto;
    min-height: 0;
    max-height: 26rem;
    margin: 0;
    padding: 14px 16px;
    border: 0;
    border-radius: 0;
    background: var(--surface);
    font-family: var(--font-mono);
    font-size: 0.82rem;
    line-height: 1.6;
    white-space: pre;
    overflow: auto;
    tab-size: 4;
}

.page-tool--nested-data-flattener .ndf-output:focus {
    box-shadow: inset 0 0 0 2px var(--accent);
    outline: none;
}

.page-tool--nested-data-flattener .ndf-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 12px 16px;
    border-top: 1px solid var(--line);
    background: var(--surface-2);
}

.page-tool--nested-data-flattener .ndf-about__text {
    max-width: 80ch;
    margin: 0;
    color: var(--muted);
    font-size: 0.9rem;
    line-height: 1.6;
}

.page-tool--nested-data-flattener .ndf-about__text code {
    padding: 0.05rem 0.3rem;
    border-radius: var(--radius-xs);
    background: var(--surface-3);
    color: var(--ink-2);
    font-family: var(--font-mono);
}

@media (max-width: 860px) {
    .page-tool--nested-data-flattener .ndf-workspace {
        grid-template-columns: 1fr;
    }

    .page-tool--nested-data-flattener .ndf-textarea {
        min-height: 16rem;
    }

    .page-tool--nested-data-flattener .ndf-output {
        max-height: 22rem;
    }
}