/*
     * Loaded after anonymizer-common.css.
     * Only difference-viewer-specific layout and visual overrides belong here.
     */
    /* Page shell and shared controls */
    :root {
      --added: #dafbe1;
      --added-strong: #aceebb;
      --removed: #ffebe9;
      --removed-strong: #ffcecb;
      --changed: #fff8c5;
      --current: #0969da;
      --shadow: 0 14px 36px rgba(31, 35, 40, .08);
      --diff-code-line-height: 23px;
      --diff-editor-min-width: 540px;
      --diff-editor-default-height: 320px;
      --diff-editor-min-height: 300px;
      --diff-result-line-number-width: 54px;
      --diff-result-marker-width: 24px;
      --diff-result-min-code-width: 700px;
      --diff-result-height: 600px;
      --diff-result-compact-height: 420px;
      --diff-empty-result-min-height: 300px;
    }

    .diff-viewer-page, .diff-viewer-page * {
      box-sizing: border-box;
    }

    body.diff-viewer-page {
      margin: 0;
      min-height: 100vh;
      color: var(--text);
      background: var(--bg);
      font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
    }

    .diff-viewer-page main {
      width: max(min(1500px, calc(100% - 32px)), var(--diff-workspace-width, 0px));
      margin: 0 auto;
      padding: 36px 0;
    }

    .diff-viewer-page header {
      display: block;
      margin-bottom: 18px;
    }
    .diff-viewer-page h1 {
      margin: 0;
      font-size: clamp(1.7rem, 3vw, 2.2rem);
    }
    .diff-viewer-page header p {
      margin: 8px 0 0;
      color: var(--muted);
      line-height: 1.7;
    }

    .diff-viewer-page .breadcrumb {
      display: flex;
      align-items: center;
      gap: 8px;
      margin-bottom: 12px;
      color: var(--muted);
      font-size: .9rem;
    }

    .diff-viewer-page a {
      color: var(--accent);
      font-weight: 700;
      text-decoration: none;
    }
    .diff-viewer-page a:hover, .diff-viewer-page a:focus-visible {
      text-decoration: underline;
    }

    .diff-viewer-page .notice, .diff-viewer-page .panel {
      margin-bottom: 16px;
      background: var(--panel);
      border: 1px solid var(--line);
      border-radius: 12px;
      box-shadow: var(--shadow);
    }

    .diff-viewer-page .notice {
      padding: 12px 14px;
      color: #0550ae;
      background: #ddf4ff;
      border-color: #b6e3ff;
      line-height: 1.65;
    }

    .diff-viewer-page .panel {
      padding: 16px;
    }
    .diff-viewer-page .panel h2 {
      margin: 0;
      font-size: 1.08rem;
    }

    .diff-viewer-page .toolbar,
    .diff-viewer-page .actions,
    .diff-viewer-page .options,
    .diff-viewer-page .pane-title,
    .diff-viewer-page .file-actions,
    .diff-viewer-page .status-list {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 9px;
    }

    .diff-viewer-page .toolbar {
      justify-content: space-between;
      padding: 0;
      background: transparent;
      border: 0;
      border-radius: 0;
    }
    .diff-viewer-page .options {
      margin-top: 14px;
    }

    .diff-viewer-page label {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--muted);
      font-size: .9rem;
      font-weight: 700;
    }

    .diff-viewer-page select, .diff-viewer-page button {
      color: var(--text);
      background: var(--panel);
      border: 1px solid var(--line);
      border-radius: 8px;
      font: inherit;
    }

    .diff-viewer-page select {
      min-height: 36px;
      padding: 6px 9px;
    }
    .diff-viewer-page input[type="checkbox"] {
      width: 16px;
      height: 16px;
      margin: 0;
      accent-color: var(--accent);
    }

    .diff-viewer-page button {
      min-height: 36px;
      padding: 6px 12px;
      background: var(--panel-2);
      font-weight: 700;
      cursor: pointer;
    }

    .diff-viewer-page button.primary {
      color: #ffffff;
      background: var(--accent);
      border-color: var(--accent);
    }
    .diff-viewer-page button.primary:hover, .diff-viewer-page button.primary:focus-visible {
      background: var(--accent-2);
    }
    .diff-viewer-page button:disabled {
      cursor: not-allowed;
      opacity: .5;
    }

    /* Input editor workspace */
    .diff-viewer-page .input-pane {
      min-width: 0;
    }
    .diff-viewer-page .pane-title {
      justify-content: space-between;
      min-height: 40px;
    }
    .diff-viewer-page .pane-title strong {
      font-size: 1rem;
    }
    .diff-viewer-page .file-name {
      color: var(--muted);
      font-size: .82rem;
      overflow-wrap: anywhere;
    }

    .diff-viewer-page .drop-target {
      position: relative;
      outline: 2px dashed transparent;
      outline-offset: -2px;
      border-radius: 9px;
    }

    .diff-viewer-page .drop-target.is-dragging {
      outline-color: var(--accent);
      box-shadow: inset 0 0 0 9999px rgba(9, 105, 218, .08);
    }

    .diff-viewer-page .diff-editors {
      --code-font-size: 14px;
      --code-line-height: var(--diff-code-line-height);
      width: max-content;
      min-width: 0;
      grid-template-columns: var(--left-width, 720px) var(--right-width, 720px);
      margin: 0;
      border: 0;
      border-radius: 0;
      overflow: visible;
    }

    .diff-viewer-page .diff-editor-shell {
      width: max-content;
      min-width: 0;
      margin: 14px auto 0;
      overflow: hidden;
      background: var(--panel);
      border: 1px solid var(--line);
      border-radius: 8px;
    }

    .diff-viewer-page .diff-editors .editor-title {
      min-height: 108px;
      padding: 9px 12px;
    }

    .diff-viewer-page .diff-editors .code-layer {
      height: var(--diff-editor-default-height);
      min-height: var(--diff-editor-min-height);
    }

    .diff-viewer-page .diff-editors .file-actions button {
      color: var(--text);
      background: var(--panel-2);
      border-color: var(--line);
    }

    .diff-viewer-page .diff-display-settings {
      grid-template-columns: repeat(4, max-content);
      margin: 0;
      border: 0;
      border-bottom: 1px solid var(--line);
      border-radius: 0;
    }

    .diff-viewer-page .diff-display-settings select {
      color: var(--text);
      background: var(--control-bg);
      border-color: var(--line);
    }

    /* Comparison progress and status */
    .diff-viewer-page .progress-row {
      display: grid;
      grid-template-columns: 1fr auto;
      align-items: center;
      gap: 7px 12px;
      margin-top: 12px;
    }

    .diff-viewer-page progress {
      width: 100%;
      height: 15px;
      accent-color: var(--accent);
    }
    .diff-viewer-page .message {
      grid-column: 1 / -1;
      color: var(--muted);
      font-size: .88rem;
    }
    .diff-viewer-page .message.error {
      color: #cf222e;
      font-weight: 700;
    }

    .diff-viewer-page .status-list {
      color: var(--muted);
      font-size: .9rem;
    }
    .diff-viewer-page .status-list strong {
      color: var(--text);
    }

    /* Comparison result viewer */
    .diff-viewer-page .viewer-panel {
      --result-bg: #ffffff;
      --result-heading-bg: #f6f8fa;
      --result-gutter: #f6f8fa;
      --result-text: #1f2328;
      --result-muted: #6e7781;
      padding: 0;
      overflow: hidden;
      color: var(--result-text);
      background: var(--result-bg);
    }
    .diff-viewer-page .viewer-toolbar {
      padding: 13px 16px;
      border-bottom: 1px solid var(--line);
    }
    .diff-viewer-page .viewer-grid {
      display: grid;
      grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
      gap: 0;
    }
    .diff-viewer-page .viewer-pane {
      min-width: 0;
    }
    .diff-viewer-page .viewer-pane + .viewer-pane {
      border-left: 1px solid var(--line);
    }
    .diff-viewer-page .viewer-heading {
      padding: 9px 12px;
      color: var(--result-text);
      background: var(--result-heading-bg);
      border-bottom: 1px solid var(--line);
      font-weight: 800;
    }

    .diff-viewer-page .diff-scroll {
      height: var(--diff-result-height);
      overflow: auto;
      color: var(--result-text);
      background: var(--result-bg);
      scrollbar-color: #8c959f var(--panel-2);
    }

    /* Theme-specific result and editor control tokens */
    :root[data-theme="dark"] .diff-viewer-page .viewer-panel {
      color-scheme: dark;
      --panel: #252526;
      --panel-2: #1f1f1f;
      --line: #30363d;
      --text: #f0f0f0;
      --muted: #b8b8b8;
      --added: rgba(46, 160, 67, .24);
      --added-strong: rgba(63, 185, 80, .42);
      --removed: rgba(248, 81, 73, .22);
      --removed-strong: rgba(248, 81, 73, .42);
      --changed: rgba(210, 153, 34, .22);
      --current: #58a6ff;
      --result-bg: #252526;
      --result-heading-bg: #1f1f1f;
      --result-gutter: #1f1f1f;
      --result-text: #f0f0f0;
      --result-muted: #b8b8b8;
      color: var(--result-text);
      background: var(--result-bg);
      scrollbar-color: #6e7681 #21262d;
    }

    /* Page scoping must not break the shared editor's dark control tokens. */
    :root[data-theme="dark"] .diff-viewer-page .diff-editors {
      --panel-2: #21262d;
      --line: #30363d;
      --text: #e6edf3;
    }

    :root[data-theme="dark"] .diff-viewer-page .panel:not(.viewer-panel) > .toolbar {
      color-scheme: light;
      --panel: #ffffff;
      --panel-2: #f6f8fa;
      --line: #d0d7de;
      --text: #1f2328;
      --muted: #57606a;
      --accent: #0969da;
      --accent-2: #0757b5;
      --hover-line: #8c959f;
    }

    /* Difference rows and inline change states */
    .diff-viewer-page .diff-lines {
      min-width: max-content;
    }

    .diff-viewer-page .diff-line {
      display: grid;
      grid-template-columns:
        var(--diff-result-line-number-width)
        var(--diff-result-marker-width)
        minmax(var(--diff-result-min-code-width), 1fr);
      min-height: var(--diff-line-height, var(--diff-code-line-height));
      font:
        var(--diff-font-size, 14px)/var(--diff-line-height, var(--diff-code-line-height))
        var(--diff-font-family, "Cascadia Code", Consolas, monospace);
    }

    .diff-viewer-page .line-number {
      padding: 0 8px;
      color: var(--result-muted);
      background: var(--result-gutter);
      border-right: 1px solid var(--line);
      text-align: right;
      user-select: none;
    }

    .diff-viewer-page .line-marker {
      text-align: center;
      user-select: none;
    }
    .diff-viewer-page .line-code {
      padding: 0 8px;
      white-space: pre;
      tab-size: 4;
    }
    .diff-viewer-page .diff-line.equal .line-code {
      color: var(--result-text);
      background: var(--result-bg);
    }
    .diff-viewer-page .diff-line.add .line-code, .diff-viewer-page .diff-line.add .line-marker {
      background: var(--added);
    }
    .diff-viewer-page .diff-line.delete .line-code, .diff-viewer-page .diff-line.delete .line-marker {
      background: var(--removed);
    }
    .diff-viewer-page .diff-line.change .line-code, .diff-viewer-page .diff-line.change .line-marker {
      background: var(--changed);
    }
    .diff-viewer-page .diff-line.blank .line-code, .diff-viewer-page .diff-line.blank .line-marker {
      color: var(--result-muted);
      background: var(--result-heading-bg);
    }
    .diff-viewer-page .inline-add {
      background: var(--added-strong);
      border-radius: 2px;
    }
    .diff-viewer-page .inline-delete {
      background: var(--removed-strong);
      border-radius: 2px;
    }
    .diff-viewer-page .diff-line.current {
      outline: 2px solid var(--current);
      outline-offset: -2px;
      position: relative;
      z-index: 1;
    }

    /* Empty and visibility states */
    .diff-viewer-page .empty-result {
      display: grid;
      place-items: center;
      min-height: var(--diff-empty-result-min-height);
      color: var(--muted);
      text-align: center;
    }

    .diff-viewer-page [hidden] {
      display: none !important;
    }

    /*
     * Difference Viewer switches at 850px because each editor has a 540px minimum.
     * The shared stylesheet's 800px rules continue to handle generic editor controls.
     */
    /* Responsive input editor layout */
    @media (max-width: 850px) {
      .diff-viewer-page main {
        width: min(100% - 20px, 1500px);
        padding: 22px 0;
      }
      .diff-viewer-page .diff-editors {
        width: max-content;
        min-width: var(--diff-editor-min-width);
        grid-template-columns: minmax(var(--diff-editor-min-width), 1fr);
      }
      .diff-viewer-page .diff-editor-shell {
        width: max-content;
        min-width: var(--diff-editor-min-width);
      }
      .diff-viewer-page .diff-display-settings {
        grid-template-columns: 1fr;
        grid-auto-rows: auto;
      }
      .diff-viewer-page .diff-editors .editor + .editor {
        border-top: 1px solid var(--line);
        border-left: 0;
      }
    }

    /* Responsive comparison result layout */
    @media (max-width: 850px) {
      .diff-viewer-page .viewer-grid {
        grid-template-columns: 1fr;
      }
      .diff-viewer-page .viewer-pane + .viewer-pane {
        border-top: 1px solid var(--line);
        border-left: 0;
      }
      .diff-viewer-page .diff-scroll {
        height: var(--diff-result-compact-height);
      }
    }