.structured-field-editor {

  // --- Field spacing ---
  .sf-field {
    margin-bottom: 12px;
  }

  .sf-field-boolean {
    margin-bottom: 8px;
  }

  // --- Object editor ---
  .sf-object {
    &.sf-object-root {
      // Root level: no border
    }

    &:not(.sf-object-root) {
      border: 1px solid var(--border-color, #ccc);
      border-radius: 4px;
      padding: 12px;
      margin-bottom: 12px;
      background: var(--body-bg, #fff);

      &.sf-object-collapsed {
        padding: 0;
      }
    }
  }

  .sf-object-title {
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 600;
    font-size: 0.8125rem;
    color: var(--body-fg, #333);
    text-transform: capitalize;
    padding: 0 4px;
  }

  .sf-object-title-text {
    flex-shrink: 0;
  }

  .sf-object-summary {
    font-weight: 400;
    font-size: 0.75rem;
    color: var(--body-quiet-color, #888);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 240px;
  }

  .sf-collapse-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    padding: 0;
    border: none;
    background: transparent;
    cursor: pointer;
    color: var(--body-quiet-color, #888);
    border-radius: 3px;
    flex-shrink: 0;

    &:hover {
      background: var(--darkened-bg, #f0f0f0);
      color: var(--body-fg, #333);
    }
  }

  .sf-object-fields {
    display: flex;
    flex-direction: column;
  }

  // --- Array editor ---
  .sf-array {
    margin-bottom: 12px;
  }

  .sf-array-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;

    .sf-label {
      margin-bottom: 0;
    }
  }

  .sf-array-collapse-toggle {
    margin-left: auto;
    display: inline-flex;
    align-items: center;
    cursor: pointer;
    color: var(--body-quiet-color, #aaa);
    line-height: 0;

    &:hover {
      color: var(--body-fg, #333);
    }
  }

  .sf-array-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 20px;
    height: 20px;
    padding: 0 6px;
    background: var(--darkened-bg, #f0f0f0);
    border-radius: 10px;
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--body-quiet-color, #666);
  }

  .sf-array-items {
    display: flex;
    flex-direction: column;
    gap: 8px;
  }

  .sf-array-item {
    border: 1px solid var(--border-color, #ccc);
    border-radius: 4px;
    background: var(--darkened-bg, #f8f8f8);
    overflow: visible;
    position: relative;
  }

  .sf-array-item {
    &[draggable="true"] {
      cursor: grab;
    }

    &.sf-dragging {
      opacity: 0.4;
    }

    &.sf-drag-over {
      outline: 2px solid var(--primary-color, #3b82f6);
      outline-offset: -2px;
    }
  }

  .sf-array-item-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 4px 8px;
    background: var(--darkened-bg, #f0f0f0);
    border-bottom: 1px solid var(--border-color, #ccc);
    border-radius: 4px 4px 0 0;
  }

  .sf-array-item-left {
    display: flex;
    align-items: center;
    gap: 6px;
  }

  .sf-drag-handle {
    display: inline-flex;
    align-items: center;
    color: var(--body-quiet-color, #aaa);
    cursor: grab;
    padding: 0 2px;
    line-height: 0;

    &:active {
      cursor: grabbing;
    }

    &:hover {
      color: var(--body-fg, #555);
    }
  }

  .sf-array-item-index {
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--body-quiet-color, #666);
  }

  .sf-array-item-actions {
    display: flex;
    gap: 4px;
  }

  .sf-array-item-body {
    padding: 10px;

    > .sf-object.sf-object-root,
    > .sf-object:not(.sf-object-root) {
      border: none;
      padding: 0;
      margin: 0;
      background: transparent;
    }
  }

  // --- Inline nullable controls ---
  .sf-null-badge {
    display: inline-block;
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--body-quiet-color, #888);
    background: var(--darkened-bg, #f0f0f0);
    border: 1px solid var(--border-color, #ccc);
    border-radius: 3px;
    padding: 1px 5px;
    vertical-align: middle;
    margin-left: 4px;
  }

  .sf-input-row {
    display: flex;
    align-items: stretch;
    gap: 4px;

    .sf-input {
      flex: 1;
      min-width: 0;
    }
  }

  .sf-boolean-row {
    display: flex;
    align-items: center;
    gap: 6px;
  }

  .sf-null-clear-btn {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    padding: 0;
    border: 1px solid var(--border-color, #ccc);
    border-radius: 4px;
    background: transparent;
    cursor: pointer;
    color: var(--body-quiet-color, #888);
    font-size: 0.75rem;
    line-height: 1;
    align-self: center;

    &:hover {
      background: var(--error-bg, #fff2f2);
      border-color: var(--error-fg, #ba2121);
      color: var(--error-fg, #ba2121);
    }
  }

  // --- Nullable editor ---
  .sf-nullable {
    margin-bottom: 12px;
  }

  .sf-nullable-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 4px;

    .sf-label {
      margin-bottom: 0;
    }
  }

  .sf-nullable-body {
    padding-left: 0;

    &:not(:empty) {
      border: 1px solid var(--border-color, #ccc);
      border-radius: 4px;
      padding: 12px;
      margin-top: 4px;
      background: var(--body-bg, #fff);
    }
  }

  // --- JSON editor ---
  .sf-field-json {
    .sf-json-editor {
      position: relative;
      border: 1px solid var(--border-color, #ccc);
      border-radius: 4px;
      overflow: hidden;

      &.sf-json-error {
        border-color: var(--error-fg, #ba2121);
      }
    }

    .sf-json-toolbar {
      display: flex;
      align-items: center;
      justify-content: flex-end;
      gap: 8px;
      padding: 4px 6px;
      background: var(--darkened-bg, #f8f8f8);
      border-bottom: 1px solid var(--border-color, #ccc);
    }

    .sf-json-error-msg {
      font-size: 0.72rem;
      color: var(--error-fg, #ba2121);
      flex: 1;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }

    .sf-json-format-btn {
      flex-shrink: 0;
    }

    .sf-json-ace-container {
      width: 100%;
      font-size: 0.8rem;
      // Ace sets its own height via maxLines/minLines
      .ace_editor {
        font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace !important;
        font-size: 0.8rem !important;
      }
    }

    .sf-json-textarea-fallback {
      width: 100%;
      min-height: 120px;
      font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
      font-size: 0.8rem;
      border: none;
      border-radius: 0;
      resize: vertical;
    }
  }

  // --- Union editor ---
  .sf-union {
    margin-bottom: 12px;
  }

  .sf-union-body {
    border: 1px solid var(--border-color, #ccc);
    border-radius: 4px;
    padding: 12px;
    margin-top: 8px;
    background: var(--body-bg, #fff);

    > .sf-object {
      border: none;
      padding: 0;
      margin: 0;
      background: transparent;
    }
  }
}