:root {
        --grid-bg: #f4f4f4;
        --grid-line: #e7e7e7;
        --ink: #262626;
        --accent: #7a35ff;
        --accent-soft: #efe7ff;
        --danger: #d64b4b;
        --status-ink: #5d5d5d;
      }

      :root[data-theme="dark"] {
        color-scheme: dark;
        --grid-bg: #0f172a;
        --grid-line: rgba(148, 163, 184, 0.12);
        --ink: #e5e7eb;
        --accent: #a78bfa;
        --accent-soft: rgba(124, 58, 237, 0.24);
        --danger: #f87171;
        --status-ink: #cbd5e1;
      }

      * {
        box-sizing: border-box;
      }

      body {
        margin: 0;
        font-family: "Segoe UI", "Yu Gothic UI", sans-serif;
        color: var(--ink);
        background: var(--grid-bg);
        overflow: hidden;
      }

      .app {
        height: 100vh;
        position: relative;
        overflow: hidden;
        background-image:
          linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
          linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
        background-size: 46px 46px;
      }

      .overlay-ui {
        position: absolute;
        inset: 0;
        z-index: 10;
        display: flex;
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
        pointer-events: none;
      }

      .toolbar {
        position: relative;
        z-index: 5;
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        gap: 8px;
        border: 1px solid #ddd;
        border-radius: 14px;
        background: rgba(255, 255, 255, 0.9);
        backdrop-filter: blur(10px);
        box-shadow: 0 16px 34px rgba(24, 24, 24, 0.12);
        margin: 14px;
        padding: 10px;
        max-width: min(1320px, calc(100vw - 28px));
        pointer-events: auto;
      }

      .mode-switch {
        display: inline-flex;
        align-items: center;
        flex-wrap: wrap;
        gap: 4px;
        padding: 3px;
        border: 1px solid #d4d4d4;
        border-radius: 10px;
        background: #ffffff;
      }

      .mode-btn {
        min-width: 72px;
      }

      .mode-btn.is-active {
        border-color: var(--accent);
        background: var(--accent-soft);
        color: #5221b2;
        font-weight: 700;
      }

      .camera-follow-btn {
        min-width: 58px;
        opacity: 0.55;
      }

      .camera-follow-btn.is-active {
        border-color: var(--accent);
        background: var(--accent-soft);
        color: #5221b2;
        opacity: 1;
      }

      .scatter-toolbar {
        position: relative;
        z-index: 5;
        display: inline-flex;
        flex-wrap: wrap;
        align-items: center;
        gap: 6px;
        margin-left: 76px;
        padding: 7px;
        border: 1px solid #d7d7d7;
        border-radius: 12px;
        background: rgba(255, 255, 255, 0.92);
        box-shadow: 0 12px 24px rgba(24, 24, 24, 0.1);
        pointer-events: auto;
      }

      .scatter-toolbar[hidden] {
        display: none;
      }

      .scatter-tool-btn {
        min-width: 78px;
        min-height: 32px;
        font-weight: 700;
      }

      .scatter-tool-btn.is-active {
        border-color: #2f7d6d;
        background: #e5f5f1;
        color: #195c50;
      }

      .scatter-range-control {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        height: 32px;
        padding: 0 8px;
        border: 1px solid #e0e0e0;
        border-radius: 8px;
        background: #fafafa;
        color: #333;
        font-size: 12px;
        font-weight: 700;
      }

      .scatter-range-control input {
        width: 112px;
        accent-color: #2f7d6d;
      }

      .toolbar-sep {
        color: #ccc;
        font-size: 18px;
        user-select: none;
        padding: 0 2px;
      }

      /* ── Hamburger menu ── */
      .hamburger-wrap, .import-wrap, .export-wrap, .integrate-wrap {
        position: relative;
      }
      .hamburger-btn {
        font-size: 20px;
        line-height: 1;
        padding: 4px 8px;
        border: 1px solid #d4d4d4;
        border-radius: 8px;
        background: #fff;
        cursor: pointer;
      }
      .hamburger-btn:hover { background: #f5f5f5; }
      .hamburger-menu, .export-menu {
        position: absolute;
        top: calc(100% + 6px);
        left: 0;
        z-index: 20;
        flex-direction: column;
        gap: 6px;
        min-width: 160px;
        padding: 10px;
        background: #fff;
        border: 1px solid #ddd;
        border-radius: 10px;
        box-shadow: 0 8px 24px rgba(0,0,0,0.15);
      }
      .hamburger-menu:not([hidden]), .export-menu:not([hidden]) {
        display: flex;
      }
      .export-menu { left: auto; right: 0; min-width: 100px; }
      .integrate-menu {
        min-width: 220px;
      }
      .menu-section-title {
        font-size: 10px;
        font-weight: 700;
        text-transform: uppercase;
        letter-spacing: 0.06em;
        color: #999;
        margin-bottom: 2px;
      }
      .menu-section {
        display: flex;
        flex-direction: column;
        gap: 4px;
      }

      .integrate-menu button.is-active {
        border-color: var(--accent);
        background: var(--accent-soft);
        color: #5221b2;
        font-weight: 700;
      }

      .cloud-sync-badge {
        font-size: 12px;
        font-weight: 600;
        padding: 4px 8px;
        border-radius: 999px;
        border: 1px solid #d8d8d8;
        background: #f6f6f6;
        color: #6b6b6b;
      }

      .cloud-sync-badge.on {
        border-color: #7ebf95;
        background: #e8f7ee;
        color: #1f7a43;
      }

      .cloud-sync-badge.conflict {
        border-color: #e0a35c;
        background: #fff3e2;
        color: #a35d16;
      }

      .menu-text-input {
        width: 100%;
        min-width: 0;
        box-sizing: border-box;
        border: 1px solid rgba(0, 0, 0, 0.12);
        border-radius: 8px;
        padding: 8px 10px;
        font: inherit;
        background: rgba(255, 255, 255, 0.96);
        color: #222;
        outline: none;
      }

      .menu-text-input:focus {
        border-color: rgba(54, 110, 255, 0.65);
        box-shadow: 0 0 0 3px rgba(54, 110, 255, 0.14);
      }

      .menu-meta {
        font-size: 12px;
        color: #666;
        line-height: 1.4;
      }

      .mode-badge {
        position: fixed;
        top: 12px;
        left: 50%;
        transform: translateX(-50%);
        z-index: 1000;
        font-size: 24px;
        font-weight: 700;
        letter-spacing: 0.08em;
        padding: 8px 20px;
        border-radius: 999px;
        border: 2px solid #d8d8d8;
        background: #f6f6f6;
        color: #6b6b6b;
        pointer-events: none;
        user-select: none;
      }

      .mode-badge.review {
        font-size: 28px;
        padding: 12px 28px;
        border: 3px solid #9b59b6;
        background: #f3e8f8;
        color: #6a3a82;
        box-shadow: 0 2px 12px rgba(155, 89, 182, 0.4);
        animation: mode-badge-pulse 2s ease-in-out infinite;
      }

      .mode-badge.readonly {
        border-color: #4b8fd7;
        background: #e8f3ff;
        color: #255a91;
      }

      .readonly-banner {
        position: fixed;
        top: 64px;
        left: 50%;
        transform: translateX(-50%);
        z-index: 1000;
        padding: 6px 14px;
        border: 1px solid #9bc1e8;
        border-radius: 999px;
        background: #f2f8ff;
        color: #255a91;
        font-size: 13px;
        font-weight: 600;
        pointer-events: none;
      }

      body.readonly-link .linear-text {
        background: #f7f9fb;
        color: #39424b;
      }

      @keyframes mode-badge-pulse {
        0%, 100% { box-shadow: 0 2px 12px rgba(155, 89, 182, 0.4); }
        50% { box-shadow: 0 2px 24px rgba(155, 89, 182, 0.7); }
      }

      button,
      select,
      input[type="file"],
      input[type="text"] {
        border: 1px solid #d4d4d4;
        border-radius: 8px;
        background: #fff;
        padding: 6px 10px;
        font-size: 13px;
      }

      input[type="text"] {
        min-width: 240px;
      }

      button {
        cursor: pointer;
      }

      button.primary {
        border-color: var(--accent);
        background: var(--accent);
        color: #fff;
      }

      button.danger {
        border-color: var(--danger);
        color: var(--danger);
      }

      .meta,
      .shortcuts,
      .status,
      .visual-check {
        font-size: 12px;
        color: #5d5d5d;
      }

      .status,
      .visual-check {
        min-height: 18px;
      }

      .meta-panel {
        position: relative;
        z-index: 5;
        display: flex;
        flex-direction: column;
        gap: 6px;
        max-width: min(520px, calc(100vw - 28px));
        padding: 12px 14px;
        border: 1px solid rgba(223, 223, 223, 0.95);
        border-radius: 16px;
        background: rgba(255, 255, 255, 0.82);
        backdrop-filter: blur(10px);
        box-shadow: 0 12px 28px rgba(24, 24, 24, 0.1);
        margin-left: 14px;
        pointer-events: auto;
      }

      .meta-panel[hidden] {
        display: none;
      }

      .visual-check {
        display: none;
        padding: 8px 10px;
        border: 1px solid #dfdfdf;
        border-radius: 10px;
        background: #ffffffc7;
        white-space: pre-wrap;
      }

      .board {
        position: absolute;
        inset: 0;
        pointer-events: auto;
        border: 1px solid #dfdfdf;
        border-radius: 14px;
        background: #ffffff55;
        overflow: hidden;
        cursor: grab;
        user-select: none;
        touch-action: none;
      }

      .workspace {
        position: absolute;
        inset: 0;
        z-index: 1;
        pointer-events: auto;
      }

      .linear-panel {
        position: absolute;
        top: 12px;
        left: 12px;
        width: 380px;
        max-width: none;
        transform-origin: top left;
        z-index: 3;
        display: flex;
        align-items: stretch;
        border: none;
        background: transparent;
        box-shadow: none;
        padding: 0;
        min-height: 0;
        min-width: 220px;
        overflow: visible;
      }

      .linear-panel[hidden] {
        display: none;
      }

      .linear-menu {
        position: absolute;
        top: 10px;
        right: 24px;
        z-index: 4;
        display: flex;
        flex-direction: column;
        align-items: flex-end;
        gap: 6px;
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.12s ease;
      }

      .linear-panel.menu-visible .linear-menu {
        opacity: 1;
        pointer-events: auto;
      }

      .linear-menu-toggle {
        width: 34px;
        height: 34px;
        border-radius: 10px;
        border: 1px solid #d5d5d5;
        background: rgba(255, 255, 255, 0.92);
        color: #353535;
        font-size: 18px;
        font-weight: 700;
        line-height: 1;
        padding: 0;
      }

      .linear-adjust-controls {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 6px;
        border: 1px solid #d8d8d8;
        border-radius: 12px;
        background: rgba(255, 255, 255, 0.96);
        box-shadow: 0 8px 18px rgba(24, 24, 24, 0.12);
      }

      .linear-adjust-controls > button {
        min-width: 52px;
        padding: 5px 8px;
      }

      .linear-text {
        width: 100%;
        flex: 1;
        min-height: 0;
        resize: none;
        border: 4px solid var(--accent);
        border-radius: 34px;
        background: #fff;
        padding: 56px 20px 18px;
        font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
        font-size: var(--linear-text-font-size, 44px);
        line-height: 1.2;
        color: #222;
        box-shadow: 0 8px 18px rgba(24, 24, 24, 0.1);
        overflow: hidden;
      }

      .linear-resize-handle {
        position: absolute;
        top: 0;
        right: -10px;
        width: 20px;
        height: 100%;
        cursor: ew-resize;
        touch-action: none;
        background: transparent;
      }

      .linear-resize-handle::before {
        content: "";
        position: absolute;
        top: 8%;
        bottom: 8%;
        left: 9px;
        width: 2px;
        border-radius: 2px;
        background: rgba(122, 53, 255, 0.55);
      }

      .local-fs-panel {
        position: absolute;
        top: 76px;
        left: 12px;
        bottom: 12px;
        z-index: 6;
        width: min(520px, calc(100vw - 28px));
        display: flex;
        flex-direction: column;
        pointer-events: auto;
        border: 1px solid rgba(0, 0, 0, 0.16);
        border-radius: 8px;
        background: rgba(255, 255, 255, 0.97);
        box-shadow: 0 18px 44px rgba(20, 20, 20, 0.18);
        overflow: hidden;
      }

      .local-fs-panel[hidden] {
        display: none;
      }

      .local-fs-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 10px;
        padding: 10px 12px;
        border-bottom: 1px solid #e5e5e5;
        background: #f7f7f7;
      }

      .local-fs-title {
        font-weight: 700;
        font-size: 14px;
      }

      .local-fs-controls {
        display: grid;
        grid-template-columns: minmax(0, 1fr) auto auto;
        gap: 8px;
        padding: 10px 12px;
        border-bottom: 1px solid #e8e8e8;
      }

      .local-fs-root-input {
        min-width: 0;
        border: 1px solid #d6d6d6;
        border-radius: 6px;
        padding: 7px 9px;
        font: 12px ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
      }

      .local-fs-status {
        min-height: 28px;
        padding: 6px 12px;
        border-bottom: 1px solid #ededed;
        color: #666;
        font-size: 12px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
      }

      .local-fs-status.is-error {
        color: var(--danger);
      }

      .local-fs-body {
        display: grid;
        grid-template-rows: minmax(180px, 42%) minmax(0, 1fr);
        min-height: 0;
        flex: 1;
      }

      .local-fs-tree {
        min-height: 0;
        overflow: auto;
        padding: 6px 0;
        border-bottom: 1px solid #e7e7e7;
      }

      .local-fs-row {
        display: grid;
        grid-template-columns: 22px 44px minmax(0, 1fr);
        align-items: center;
        min-height: 28px;
        padding: 2px 10px 2px var(--local-fs-indent, 10px);
        font-size: 13px;
        line-height: 1.25;
        cursor: default;
        user-select: none;
      }

      .local-fs-row:hover {
        background: #f4f6f8;
      }

      .local-fs-row.is-selected {
        background: #dceeff;
      }

      .local-fs-toggle {
        width: 20px;
        height: 22px;
        padding: 0;
        border: 0;
        background: transparent;
        color: #555;
        font: 12px ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
      }

      .local-fs-toggle.is-empty {
        visibility: hidden;
      }

      .local-fs-kind {
        color: #727272;
        font-size: 11px;
        text-transform: uppercase;
      }

      .local-fs-name {
        min-width: 0;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
      }

      .local-fs-children {
        min-width: 0;
      }

      .local-fs-preview-wrap {
        min-height: 0;
        display: flex;
        flex-direction: column;
      }

      .local-fs-preview-title {
        padding: 8px 12px;
        border-bottom: 1px solid #ececec;
        font-size: 12px;
        font-weight: 700;
        color: #4d4d4d;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
      }

      .local-fs-preview {
        min-height: 0;
        flex: 1;
        margin: 0;
        padding: 12px;
        overflow: auto;
        background: #fbfbfb;
        color: #222;
        font: 12px/1.45 ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
        white-space: pre-wrap;
        overflow-wrap: anywhere;
      }

      .board.panning {
        cursor: grabbing;
      }

      .board.pen-mode {
        cursor: crosshair;
      }

      .board.text-mode {
        cursor: text;
      }

      .board.eraser-mode {
        cursor: cell;
      }

      .tool-btn {
        height: 34px;
        padding: 0 10px;
        border: 1px solid #d8d8d8;
        border-radius: 8px;
        background: rgba(255, 255, 255, 0.92);
        color: #2f2f2f;
        font: inherit;
        font-weight: 700;
      }

      .tool-btn.is-active {
        border-color: #7c3cff;
        background: #f0e9ff;
        color: #5820d6;
      }

      .draw-toolbar {
        position: absolute;
        left: 16px;
        top: 104px;
        z-index: 40;
        display: flex;
        flex-direction: column;
        gap: 6px;
        width: 136px;
        padding: 8px;
        border: 1px solid rgba(80, 80, 96, 0.14);
        border-radius: 12px;
        background: rgba(255, 255, 255, 0.94);
        box-shadow: 0 14px 34px rgba(28, 24, 42, 0.14);
        backdrop-filter: blur(12px);
        pointer-events: auto;
      }

      .draw-tool-btn {
        display: grid;
        grid-template-columns: 24px 1fr;
        align-items: center;
        gap: 8px;
        min-height: 36px;
        padding: 6px 8px;
        border: 1px solid transparent;
        border-radius: 8px;
        background: transparent;
        color: #2b2b32;
        font: inherit;
        font-size: 12px;
        font-weight: 700;
        text-align: left;
        cursor: pointer;
      }

      .draw-tool-btn svg {
        width: 22px;
        height: 22px;
        fill: none;
        stroke: currentColor;
        stroke-width: 1.8;
        stroke-linecap: round;
        stroke-linejoin: round;
      }

      .draw-tool-btn svg text {
        fill: currentColor;
        stroke: none;
        font-size: 7px;
        font-weight: 800;
      }

      .draw-tool-btn:hover,
      .draw-tool-btn:focus-visible {
        border-color: rgba(124, 60, 255, 0.24);
        background: rgba(124, 60, 255, 0.08);
        outline: none;
      }

      .draw-tool-btn.is-active {
        border-color: rgba(124, 60, 255, 0.48);
        background: #f0e9ff;
        color: #5820d6;
      }

      .draw-tool-separator {
        height: 1px;
        margin: 2px 0;
        background: rgba(80, 80, 96, 0.14);
      }

      .draw-color-group {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 6px;
      }

      .draw-color-btn {
        width: 100%;
        aspect-ratio: 1;
        min-height: 26px;
        border: 2px solid rgba(42, 42, 48, 0.14);
        border-radius: 999px;
        background: var(--pen-color, #242424);
        cursor: pointer;
      }

      .draw-color-btn[data-pen-color="#242424"] { --pen-color: #242424; }
      .draw-color-btn[data-pen-color="#7c3cff"] { --pen-color: #7c3cff; }
      .draw-color-btn[data-pen-color="#e64980"] { --pen-color: #e64980; }
      .draw-color-btn[data-pen-color="#2f9e44"] { --pen-color: #2f9e44; }

      .draw-color-btn.is-active {
        border-color: #111;
        box-shadow: 0 0 0 2px #fff, 0 0 0 4px rgba(124, 60, 255, 0.42);
      }

      .draw-width-control {
        display: grid;
        gap: 4px;
        color: #555;
        font-size: 11px;
        font-weight: 700;
      }

      .draw-width-control input {
        width: 100%;
        accent-color: #7c3cff;
      }

      .annotation-pen {
        fill: none;
        stroke-linecap: round;
        stroke-linejoin: round;
        pointer-events: none;
      }

      .annotation-pen-draft {
        opacity: 0.72;
      }

      .annotation-text-bg {
        fill: rgba(255, 255, 255, 0.84);
        stroke: rgba(40, 40, 48, 0.13);
        stroke-width: 1;
        pointer-events: none;
      }

      .annotation-text {
        fill: #242424;
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
        font-weight: 650;
        paint-order: stroke;
        stroke: rgba(255, 255, 255, 0.72);
        stroke-width: 3px;
        stroke-linejoin: round;
        pointer-events: none;
      }

      .annotation-text-date {
        font-variant-numeric: tabular-nums;
      }

      #canvas {
        display: block;
        width: 100%;
        height: 100%;
        transform-box: border-box;
        transform-origin: 0 0;
        will-change: transform;
        pointer-events: auto;
      }

      @media (max-width: 900px) {
        .overlay-ui {
          inset: 0;
        }

        .toolbar,
        .meta-panel {
          max-width: calc(100vw - 20px);
        }

        .toolbar {
          margin: 10px;
        }

        .draw-toolbar {
          left: 10px;
          top: 82px;
          width: 124px;
        }

        .meta-panel {
          gap: 4px;
          margin-left: 10px;
          padding: 10px 12px;
        }

        .linear-panel {
          width: 360px;
          max-width: none;
        }

        .local-fs-panel {
          top: 118px;
          right: 10px;
          left: 10px;
          width: auto;
        }

        .local-fs-controls {
          grid-template-columns: 1fr;
        }
      }

      .edge {
        fill: none;
        stroke-width: 4;
        stroke-linecap: round;
        stroke-linejoin: round;
        pointer-events: none;
      }

      .edge-logic-chart {
        stroke-width: 3.4;
      }

      .edge-timeline {
        stroke-width: 2.6;
        opacity: 0.72;
      }

      .timeline-axis {
        stroke: rgba(82, 33, 178, 0.34);
        stroke-width: 3;
        stroke-linecap: round;
        pointer-events: none;
      }

      .timeline-dot {
        fill: #fff;
        stroke: rgba(82, 33, 178, 0.8);
        stroke-width: 2.5;
        pointer-events: none;
      }

      .timeline-stem {
        fill: none;
        stroke: rgba(82, 33, 178, 0.24);
        stroke-width: 1.5;
        stroke-linecap: round;
        stroke-linejoin: round;
        pointer-events: none;
      }

      .graph-link {
        fill: none;
        stroke-width: 3;
        stroke-linecap: round;
        stroke-linejoin: round;
        opacity: 0.95;
        pointer-events: stroke;
        cursor: pointer;
      }

      .graph-link-hit {
        fill: none;
        stroke: rgba(0, 0, 0, 0);
        stroke-width: 18;
        stroke-linecap: round;
        stroke-linejoin: round;
        pointer-events: stroke;
        cursor: pointer;
      }

      .graph-link.scatter-edge {
        stroke-width: 4;
        pointer-events: stroke;
        cursor: pointer;
      }

      .graph-link-hit {
        fill: none;
        stroke: transparent;
        stroke-width: 18;
        stroke-linecap: round;
        pointer-events: stroke;
        cursor: pointer;
      }

      .graph-link.is-selected {
        stroke-width: 4.5;
        filter: drop-shadow(0 0 4px rgba(68, 99, 255, 0.42));
      }

      .link-port-controls {
        pointer-events: auto;
      }

      .link-port-handle {
        fill: #ffffff;
        stroke: #4463ff;
        stroke-width: 2.5;
        cursor: grab;
        filter: drop-shadow(0 2px 5px rgba(27, 37, 83, 0.22));
      }

      .link-port-handle:active {
        cursor: grabbing;
      }

      .link-port-handle-source {
        stroke: #7c3cff;
      }

      .link-port-handle-target {
        stroke: #e64980;
      }

      .link-port-dot {
        fill: #ffffff;
        stroke: rgba(68, 99, 255, 0.48);
        stroke-width: 1.7;
        cursor: pointer;
      }

      .link-port-dot.is-active {
        fill: #4463ff;
        stroke: #ffffff;
        stroke-width: 2;
      }

      .link-mini-toolbar {
        fill: rgba(255, 255, 255, 0.96);
        stroke: rgba(44, 52, 81, 0.16);
        stroke-width: 1;
        filter: drop-shadow(0 5px 14px rgba(27, 37, 83, 0.18));
      }

      .link-mini-toolbar-icon {
        fill: #242424;
      }

      .link-mini-toolbar-icon-line {
        fill: none;
        stroke: #242424;
        stroke-width: 2;
        stroke-linecap: round;
      }

      .scatter-guide {
        fill: none;
        stroke: rgba(70, 105, 150, 0.3);
        stroke-width: 1.4;
        stroke-linecap: round;
        stroke-linejoin: round;
        pointer-events: none;
      }

      body.scatter-surface-active .app {
        background-color: #0a0a12;
        background-image: none;
      }

      body.scatter-surface-active .board {
        border-color: rgba(148, 163, 184, 0.18);
        background: #0a0a12;
      }

      body.scatter-surface-active .scatter-guide {
        stroke: rgba(56, 189, 248, 0.46);
        stroke-width: 3;
      }

      body.scatter-surface-active .graph-link.scatter-edge {
        stroke-width: 4;
        opacity: 0.82;
      }

      .graph-link.selected {
        stroke-width: 5;
        filter: drop-shadow(0 0 5px rgba(111, 57, 255, 0.55));
      }

      .graph-link-port {
        fill: #ffffff;
        stroke: var(--accent);
        stroke-width: 3;
        pointer-events: none;
      }

      .graph-link-port-source {
        fill: #efe8ff;
      }

      .graph-link-port-target {
        fill: #ffffff;
      }

      .graph-link.graph-link-soft {
        stroke-width: 2.5;
        opacity: 0.72;
      }

      .graph-link.graph-link-dashed {
        stroke-dasharray: 10 7;
      }

      .graph-link.graph-link-emphasis {
        stroke-width: 4.5;
      }

      .edge-label {
        fill: #666;
        font-size: 11px;
        font-weight: 600;
        pointer-events: none;
      }

      .graph-link-label {
        fill: #555;
        font-size: 12px;
        font-weight: 700;
        pointer-events: none;
      }

      .graph-link-label-bg {
        fill: rgba(255, 255, 255, 0.9);
        stroke: rgba(122, 53, 255, 0.22);
        stroke-width: 1.2;
        pointer-events: none;
      }

      .root-box {
        fill: #fff;
        stroke: var(--accent);
        stroke-width: 4;
      }

      .surface-scope-box {
        fill: rgba(255, 255, 255, 0.68);
        stroke: rgba(122, 53, 255, 0.42);
        stroke-width: 3;
        stroke-dasharray: 12 8;
      }

      .surface-scope-title {
        fill: #6f39ff;
        font-size: 22px;
        font-weight: 700;
        letter-spacing: 0.01em;
        pointer-events: none;
      }

      .folder-box {
        fill: #ffffff;
        stroke: #9a6b1f;
        stroke-width: 3;
      }

      .node-shape {
        fill: #ffffff;
        stroke: #666;
        stroke-width: 3;
      }

      .mindmap-box {
        fill: #ffffff;
        stroke: #8b32ff;
        stroke-width: 3;
        vector-effect: non-scaling-stroke;
      }

      .root-box.mindmap-box {
        fill: #f6edff;
        stroke: #7a2cff;
        stroke-width: 3.5;
      }

      .edge-mindmap {
        stroke-width: 3.2;
        stroke-linecap: round;
        stroke-linejoin: round;
      }

      .portal-bracket {
        fill: none;
        stroke: #9a6b1f;
        stroke-width: 4;
        stroke-linecap: round;
        stroke-linejoin: round;
      }

      .flow-preview-node {
        fill: rgba(255, 255, 255, 0.92);
        stroke: rgba(102, 102, 102, 0.72);
        stroke-width: 2;
      }

      .flow-preview-node-scope {
        stroke: rgba(154, 107, 31, 0.9);
        stroke-dasharray: 6 4;
      }

      .flow-preview-node-label {
        fill: #2f2f2f;
        font-size: 18px;
        font-weight: 600;
        pointer-events: none;
      }

      .flow-preview-edge {
        fill: none;
        stroke: rgba(122, 53, 255, 0.58);
        stroke-width: 2;
        stroke-linecap: round;
      }

      .flow-preview-edge-label {
        fill: #6f39ff;
        font-size: 10px;
        font-weight: 700;
        pointer-events: none;
      }

      .node-hit {
        fill: transparent;
        stroke: transparent;
        stroke-width: 0;
        pointer-events: all;
        cursor: pointer;
      }

      .node-hit.scatter-node {
        fill: rgba(231, 240, 252, 0.92);
        stroke: #4f8bd8;
        stroke-width: 2;
      }

      .node-hit.scatter-node.primary-selected,
      .node-hit.scatter-node.selected {
        fill: rgba(224, 239, 255, 0.96);
        stroke: #2f70ff;
      }

      .scatter-node-circle {
        fill: #ffffff;
        stroke: #969696;
        stroke-width: 3;
        cursor: pointer;
        filter: drop-shadow(0 1px 2px rgba(20, 20, 20, 0.12));
      }

      body.scatter-surface-active .scatter-node-circle {
        fill: #60a5fa;
        stroke: #0a0a12;
        stroke-width: 2;
        filter: none;
      }

      .scatter-node-circle.scatter-root {
        fill: #e8f1ff;
        stroke: #4f8bd8;
        stroke-width: 4;
      }

      body.scatter-surface-active .scatter-node-circle.scatter-root,
      body.scatter-surface-active .scatter-node-circle.scatter-branch,
      body.scatter-surface-active .scatter-node-circle.scatter-role-upstream {
        fill: #60a5fa;
      }

      body.scatter-surface-active .scatter-node-circle.scatter-group {
        fill: #818cf8;
        stroke: #a78bfa;
        stroke-width: 2.5;
        stroke-dasharray: 5 5;
      }

      body.scatter-surface-active .scatter-node-circle.scatter-role-sample {
        fill: #818cf8;
      }

      body.scatter-surface-active .scatter-node-circle.scatter-role-downstream {
        fill: #fbbf24;
      }

      .scatter-node-circle.primary-selected,
      .scatter-node-circle.selected {
        fill: #dff3ea;
        stroke: #2d8c4e;
      }

      body.scatter-surface-active .scatter-node-circle.primary-selected,
      body.scatter-surface-active .scatter-node-circle.selected {
        stroke: #4ade80;
        stroke-width: 3;
      }

      .scatter-node-circle.link-source {
        fill: #fff4bf;
        stroke: #d29c00;
      }

      .scatter-node-circle.drag-source {
        fill: #ffdede;
        stroke: #c85a5a;
      }

      .scatter-label {
        fill: #111;
        font-weight: 700;
        paint-order: stroke;
        stroke: rgba(255, 255, 255, 0.92);
        stroke-width: 4px;
        stroke-linejoin: round;
        pointer-events: none;
      }

.node-visual-box.selected {
  fill: var(--accent-soft);
  stroke: var(--accent);
  stroke-width: 2;
}

.node-visual-box.multi-selected {
  fill: color-mix(in srgb, var(--accent-soft) 68%, #ffffff 32%);
  stroke: #9d75ff;
  stroke-width: 1.6;
}

.node-visual-box.primary-selected {
  stroke: var(--accent);
  stroke-width: 3;
}

.node-visual-box.reparent-source {
  stroke-dasharray: 8 5;
}

.node-visual-box.link-source {
  stroke: var(--accent);
  stroke-width: 3;
  stroke-dasharray: 5 4;
}

.node-visual-box.cut-pending {
  fill: rgba(160, 160, 160, 0.18);
  stroke: #8a8a8a;
  stroke-width: 2;
  stroke-dasharray: 6 4;
}

.node-visual-box.alias-read {
  fill: rgba(56, 115, 255, 0.08);
  stroke: #3873ff;
  stroke-width: 1.5;
  stroke-dasharray: 6 4;
}

.node-visual-box.alias-write {
  fill: rgba(17, 153, 92, 0.1);
  stroke: #11995c;
  stroke-width: 1.5;
}

.node-visual-box.alias-broken {
  fill: rgba(214, 75, 75, 0.1);
  stroke: var(--danger);
  stroke-width: 1.5;
  stroke-dasharray: 10 6;
}

.node-visual-box.drop-target {
  fill: #d9f5e8;
  stroke: #1b9c64;
  stroke-width: 2;
  stroke-dasharray: 8 6;
}

.node-visual-box.drag-source {
  fill: #fff1c9;
}

.node-visual-box.drag-invalid {
  fill: #ffe4e4;
  stroke: var(--danger);
  stroke-width: 2;
  stroke-dasharray: 6 4;
}

.reorder-line {
  stroke: #1b9c64;
  stroke-width: 4;
  stroke-linecap: round;
  stroke-dasharray: 10 6;
  pointer-events: none;
}

      body.scatter-surface-active .scatter-label {
        fill: #cbd5e1;
        stroke: #0a0a12;
        stroke-width: 4px;
      }

      .label-root {
        font-size: 42px;
        font-weight: 500;
        fill: #232323;
        pointer-events: none;
      }

      .label-node {
        font-size: 44px;
        font-weight: 450;
        fill: #232323;
        pointer-events: none;
      }

      .label-node.selected {
        fill: #6f39ff;
        font-weight: 600;
      }

      .label-node.primary-selected {
        text-decoration: underline;
        text-decoration-thickness: 2px;
      }

      .label-node.alias-label {
        font-style: italic;
      }

      .label-node.alias-read-label {
        fill: #2f5fd9;
      }

      .label-node.alias-write-label {
        fill: #12774b;
      }

      .label-node.alias-broken-label {
        fill: var(--danger);
      }

      .alias-badge {
        font-size: 18px;
        font-weight: 700;
        letter-spacing: 0.04em;
        pointer-events: none;
        text-transform: uppercase;
      }

      .alias-badge-read {
        fill: #2f5fd9;
      }

      .alias-badge-write {
        fill: #12774b;
      }

      .alias-badge-broken {
        fill: var(--danger);
      }

      .alias-badge-scope {
        fill: #9a6b1f;
      }

      .collapsed-badge {
        fill: #ffffff;
        stroke: var(--accent);
        stroke-width: 2;
        cursor: pointer;
      }

      .collapsed-badge-node {
        fill: var(--accent-soft);
        stroke: var(--accent);
        stroke-width: 2;
        cursor: pointer;
      }

      .collapsed-badge-count {
        fill: var(--accent);
        font-size: 16px;
        font-weight: 700;
        letter-spacing: 0.02em;
        pointer-events: none;
      }

      /* ── m3e: visual style badges ── */
      .confidence-badge {
        opacity: 0.85;
        pointer-events: none;
      }

      .confidence-badge-text {
        fill: #fff;
        font-size: 13px;
        font-weight: 700;
        pointer-events: none;
      }

      /* ── m3e: status badges ── */
      .status-badge {
        opacity: 0.85;
        pointer-events: none;
      }
      .status-badge-text {
        fill: #fff;
        font-size: 12px;
        font-weight: 700;
        text-transform: uppercase;
        letter-spacing: 0.04em;
        pointer-events: none;
      }

      /* Status-specific node styles */
      .node-visual-box.status-placeholder {
        fill: rgba(153, 153, 153, 0.06);
      }
      .node-visual-box.status-confirmed {
        fill: rgba(45, 140, 78, 0.06);
      }
      .node-visual-box.status-contested {
        fill: rgba(217, 64, 64, 0.06);
      }
      .node-visual-box.status-frozen {
        fill: rgba(74, 127, 181, 0.06);
      }
      .node-visual-box.status-active {
        fill: rgba(232, 155, 26, 0.08);
      }
      .node-visual-box.status-review {
        fill: rgba(155, 89, 182, 0.06);
      }

      .label-node.status-placeholder {
        opacity: 0.55;
      }
      .label-node.status-frozen {
        opacity: 0.7;
      }

      .inline-node-editor {
        position: absolute;
        z-index: 20;
        box-sizing: border-box;
        border: 0;
        border-radius: 2px;
        background: transparent;
        color: #232323;
        padding: 0;
        font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
        font-weight: 500;
        resize: none;
        overflow: hidden;
        white-space: pre-wrap;
        outline: none;
        box-shadow: none;
        caret-color: #232323;
      }

      .inline-node-editor:focus {
        outline: none;
      }

      .inline-node-editor::selection {
        background: rgba(111, 57, 255, 0.2);
      }

      .inline-edge-label-editor {
        position: absolute;
        z-index: 21;
        box-sizing: border-box;
        border: 0;
        border-bottom: 1px solid rgba(111, 57, 255, 0.55);
        border-radius: 0;
        background: rgba(255, 255, 255, 0.72);
        color: #555;
        padding: 0 2px 1px;
        font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
        font-weight: 700;
        text-align: center;
        resize: none;
        overflow: hidden;
        white-space: pre-wrap;
        outline: none;
        box-shadow: none;
        caret-color: #232323;
      }

      .inline-edge-label-editor::selection {
        background: rgba(111, 57, 255, 0.2);
      }

      .template-completion-popover {
        position: fixed;
        z-index: 120;
        width: 360px;
        box-sizing: border-box;
        overflow: hidden;
        border: 1px solid rgba(37, 99, 235, 0.72);
        border-radius: 7px;
        background: rgba(255, 255, 255, 0.98);
        box-shadow: 0 12px 30px rgba(15, 23, 42, 0.18);
        color: #1f2937;
        font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
      }

      .template-completion-input {
        width: 100%;
        box-sizing: border-box;
        border: 0;
        border-bottom: 1px solid rgba(148, 163, 184, 0.45);
        outline: none;
        padding: 9px 11px;
        font: inherit;
        font-size: 13px;
        color: #111827;
        background: #ffffff;
      }

      .template-completion-input:focus {
        box-shadow: inset 0 0 0 1px rgba(37, 99, 235, 0.18);
      }

      .template-completion-list {
        max-height: 242px;
        overflow-y: auto;
        padding: 3px;
      }

      .template-completion-item {
        width: 100%;
        min-height: 30px;
        display: grid;
        grid-template-columns: minmax(0, 1fr) auto;
        align-items: center;
        gap: 10px;
        border: 0;
        border-radius: 4px;
        padding: 5px 8px;
        background: transparent;
        color: #1f2937;
        text-align: left;
        font: inherit;
        font-size: 13px;
        cursor: pointer;
      }

      .template-completion-item span {
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
        font-weight: 650;
      }

      .template-completion-item small {
        color: #64748b;
        font-size: 11px;
      }

      .template-completion-item.is-selected {
        background: #2563eb;
        color: #ffffff;
      }

      .template-completion-item.is-selected small {
        color: rgba(255, 255, 255, 0.78);
      }

      .template-completion-empty {
        padding: 14px 10px;
        color: #64748b;
        font-size: 13px;
      }

      .template-completion-detail {
        min-height: 38px;
        box-sizing: border-box;
        border-top: 1px solid rgba(148, 163, 184, 0.45);
        padding: 8px 10px;
        color: #475569;
        background: #f8fafc;
        font-size: 11px;
        line-height: 1.3;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
      }

      .latex-node-content {
        display: flex;
        align-items: center;
        height: 100%;
        padding: 0 4px;
        box-sizing: border-box;
        color: var(--ink);
        font-size: 44px;
        pointer-events: none;
      }

      .latex-node-content .katex-display {
        margin: 0;
      }

      /* ── Entity List Panel (left sidebar, Miro Frames-style) ── */
      .entity-list-panel {
        position: absolute;
        top: 60px;
        left: 14px;
        z-index: 12;
        width: 320px;
        max-height: calc(100vh - 90px);
        display: flex;
        flex-direction: column;
        border: 1px solid #ddd;
        border-radius: 14px;
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(10px);
        box-shadow: 0 12px 34px rgba(24, 24, 24, 0.14);
        pointer-events: auto;
        overflow: hidden;
      }

      .entity-list-panel[hidden] {
        display: none;
      }

      .entity-list-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 12px 14px 8px;
        border-bottom: 1px solid #e8e8e8;
        flex-shrink: 0;
      }

      .entity-list-title {
        font-size: 14px;
        font-weight: 700;
        text-transform: uppercase;
        letter-spacing: 0.06em;
        color: var(--accent);
      }

      .entity-list-close {
        width: 28px;
        height: 28px;
        border: none;
        background: none;
        font-size: 18px;
        color: #999;
        cursor: pointer;
        border-radius: 6px;
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 0;
      }

      .entity-list-close:hover {
        background: #f0f0f0;
        color: #333;
      }

      .entity-list-search-wrap {
        padding: 8px 14px;
        flex-shrink: 0;
      }

      .entity-list-search {
        width: 100%;
        min-width: 0;
        padding: 6px 10px;
        border: 1px solid #d4d4d4;
        border-radius: 8px;
        background: #fff;
        font-size: 13px;
        outline: none;
      }

      .entity-list-search:focus {
        border-color: var(--accent);
        box-shadow: 0 0 0 2px var(--accent-soft);
      }

      .entity-list-tree {
        flex: 1;
        overflow-y: auto;
        padding: 4px 0 8px;
      }

      .entity-row {
        display: flex;
        align-items: center;
        gap: 4px;
        padding: 4px 14px 4px;
        cursor: pointer;
        user-select: none;
        transition: background 0.08s ease;
        font-size: 13px;
        color: var(--ink);
        line-height: 1.4;
      }

      .entity-row:hover {
        background: rgba(122, 53, 255, 0.06);
      }

      .entity-row.is-selected {
        background: var(--accent-soft);
        color: #5221b2;
        font-weight: 600;
      }

      .entity-toggle {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 16px;
        height: 16px;
        font-size: 10px;
        color: #999;
        flex-shrink: 0;
        transition: transform 0.12s ease;
        border: none;
        background: none;
        padding: 0;
        cursor: pointer;
      }

      .entity-toggle.expanded {
        transform: rotate(90deg);
      }

      .entity-toggle.no-children {
        visibility: hidden;
      }

      .entity-name {
        flex: 1;
        min-width: 0;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
      }

      .entity-badge {
        font-size: 10px;
        font-weight: 600;
        padding: 1px 5px;
        border-radius: 4px;
        flex-shrink: 0;
      }

      .entity-badge-folder {
        background: #fff3e2;
        color: #9a6b1f;
      }

      .entity-badge-alias {
        background: #e8f0ff;
        color: #2f5fd9;
      }

      .entity-children {
        padding-left: 16px;
      }

      .entity-children[hidden] {
        display: none;
      }

      .entity-row .entity-highlight {
        background: #ffe066;
        border-radius: 2px;
      }

      /* ── Entity Scope List (Frames-style) ── */
      .entity-scope-list {
        padding: 6px 10px 2px;
        border-bottom: 1px solid #e8e8e8;
        flex-shrink: 0;
        max-height: 160px;
        overflow-y: auto;
      }

      .entity-scope-list:empty {
        display: none;
      }

      .entity-scope-row {
        display: flex;
        align-items: center;
        gap: 6px;
        padding: 4px 8px;
        border-radius: 6px;
        cursor: pointer;
        user-select: none;
        transition: background 0.08s ease;
        font-size: 12px;
        color: var(--ink);
        line-height: 1.4;
      }

      .entity-scope-row:hover {
        background: rgba(122, 53, 255, 0.06);
      }

      .entity-scope-row.is-current-scope {
        background: var(--accent-soft);
        color: #5221b2;
        font-weight: 600;
      }

      .entity-scope-icon {
        flex-shrink: 0;
        font-size: 11px;
        color: #9a6b1f;
      }

      .entity-scope-name {
        flex: 1;
        min-width: 0;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
      }

      .entity-scope-count {
        font-size: 10px;
        color: #999;
        flex-shrink: 0;
      }

      /* ── Presence Badge ── */
      .presence-badge {
        display: inline-block;
        width: 10px;
        height: 10px;
        border-radius: 50%;
        flex-shrink: 0;
        border: 1.5px solid #fff;
        box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.1);
        margin-left: 2px;
      }

      .presence-badges {
        display: inline-flex;
        align-items: center;
        gap: 2px;
        flex-shrink: 0;
        margin-left: auto;
        padding-left: 4px;
      }

      /* ── Change Highlight (away changes) ── */
      .entity-row.has-changes {
        border-left: 3px solid #e0a35c;
        padding-left: 11px;
      }

      /* ── Conflict Panel ── */
      .conflict-panel {
        position: absolute;
        inset: 0;
        z-index: 25;
        display: flex;
        flex-direction: column;
        background: rgba(255, 255, 255, 0.96);
        backdrop-filter: blur(12px);
        pointer-events: auto;
        overflow: hidden;
      }

      .conflict-panel[hidden] {
        display: none;
      }

      .conflict-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 16px 24px 12px;
        border-bottom: 1px solid #e8e8e8;
        flex-shrink: 0;
      }

      .conflict-title {
        font-size: 18px;
        font-weight: 700;
        color: #a35d16;
        letter-spacing: 0.02em;
      }

      .conflict-close {
        width: 32px;
        height: 32px;
        border: none;
        background: none;
        font-size: 20px;
        color: #999;
        cursor: pointer;
        border-radius: 8px;
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 0;
      }

      .conflict-close:hover {
        background: #f0f0f0;
        color: #333;
      }

      .conflict-body {
        flex: 1;
        display: flex;
        flex-direction: column;
        padding: 16px 24px;
        gap: 16px;
        overflow-y: auto;
      }

      .conflict-columns {
        display: flex;
        gap: 16px;
        flex: 1;
        min-height: 0;
      }

      .conflict-col {
        flex: 1;
        display: flex;
        flex-direction: column;
        border: 1px solid #e0e0e0;
        border-radius: 10px;
        overflow: hidden;
        min-width: 0;
      }

      .conflict-col-header {
        padding: 8px 12px;
        font-size: 12px;
        font-weight: 700;
        text-transform: uppercase;
        letter-spacing: 0.06em;
        color: #888;
        background: #f8f8f8;
        border-bottom: 1px solid #e8e8e8;
        flex-shrink: 0;
      }

      .conflict-tree {
        flex: 1;
        overflow-y: auto;
        padding: 8px 0;
      }

      .conflict-node-row {
        display: flex;
        align-items: center;
        gap: 6px;
        padding: 3px 12px;
        font-size: 13px;
        color: var(--ink);
        line-height: 1.4;
      }

      .conflict-node-row.diff-added {
        background: #e8f7ee;
        color: #1f7a43;
      }

      .conflict-node-row.diff-removed {
        background: #fde8e8;
        color: #b94040;
      }

      .conflict-node-row.diff-changed {
        background: #fff3e2;
        color: #a35d16;
      }

      .conflict-node-indent {
        display: inline-block;
        flex-shrink: 0;
      }

      .conflict-node-text {
        flex: 1;
        min-width: 0;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
      }

      .conflict-diff {
        padding: 10px 14px;
        font-size: 12px;
        color: #666;
        background: #f8f8f8;
        border-radius: 8px;
        border: 1px solid #e8e8e8;
        flex-shrink: 0;
      }

      .conflict-actions {
        display: flex;
        gap: 10px;
        justify-content: flex-end;
        flex-shrink: 0;
      }

      .conflict-actions button {
        min-width: 120px;
        padding: 8px 16px;
        font-size: 14px;
        font-weight: 600;
        border-radius: 8px;
      }

      /* ── V4 Workbench ── */
      .v4-panel {
        position: absolute;
        right: 18px;
        top: 58px;
        z-index: 24;
        width: min(420px, calc(100vw - 36px));
        max-height: calc(100vh - 80px);
        display: flex;
        flex-direction: column;
        background: rgba(255, 255, 255, 0.97);
        border: 1px solid #d7dee5;
        border-radius: 8px;
        box-shadow: 0 16px 42px rgba(19, 29, 39, 0.2);
        overflow: hidden;
        pointer-events: auto;
      }

      .v4-panel[hidden] {
        display: none;
      }

      .v4-panel-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 10px 12px;
        border-bottom: 1px solid #e4e9ee;
        background: #f8fafb;
      }

      .v4-panel-title {
        font-size: 14px;
        font-weight: 800;
        color: #1d252c;
      }

      .v4-panel-close {
        width: 28px;
        height: 28px;
        border: none;
        background: transparent;
        border-radius: 6px;
        font-size: 18px;
        line-height: 1;
        color: #67727d;
        cursor: pointer;
      }

      .v4-panel-close:hover {
        background: #edf2f6;
        color: #1d252c;
      }

      .v4-panel-body {
        overflow-y: auto;
        padding: 10px;
        display: grid;
        gap: 10px;
      }

      .v4-card {
        border: 1px solid #dfe6ec;
        border-radius: 8px;
        background: #fff;
        padding: 10px;
        display: grid;
        gap: 8px;
      }

      .v4-card-head {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 8px;
        font-size: 12px;
        font-weight: 800;
        color: #37434f;
        text-transform: uppercase;
      }

      .v4-card-head button,
      .v4-action-row button {
        border: 1px solid #cfd8e1;
        border-radius: 6px;
        background: #f7f9fb;
        color: #25313c;
        font-size: 12px;
        font-weight: 700;
        padding: 5px 8px;
      }

      .v4-card-head button:hover,
      .v4-action-row button:hover {
        background: #edf3f8;
      }

      .v4-status-line {
        font-size: 12px;
        color: #52616f;
        line-height: 1.45;
      }

      .v4-path {
        font-size: 11px;
        line-height: 1.45;
        color: #60707d;
        word-break: break-all;
      }

      .v4-list {
        display: grid;
        gap: 6px;
      }

      .v4-list-item {
        border-left: 3px solid #6aa1d8;
        background: #f7fafc;
        padding: 6px 8px;
        font-size: 12px;
        color: #2d3945;
        line-height: 1.35;
      }

      .v4-list-item small {
        display: block;
        margin-top: 2px;
        color: #71808d;
      }

      .v4-action-row {
        display: flex;
        gap: 8px;
        flex-wrap: wrap;
      }

      .v4-source-text {
        width: 100%;
        min-height: 96px;
        box-sizing: border-box;
        resize: vertical;
        border: 1px solid #d7e0e8;
        border-radius: 7px;
        background: #fbfcfd;
        color: #1d252c;
        font: 12px/1.45 "Segoe UI", sans-serif;
        padding: 8px;
      }

      .v4-source-text:focus {
        outline: 2px solid #b9d7f2;
        border-color: #6aa1d8;
      }

      @media (max-width: 900px) {
        .entity-list-panel {
          width: 280px;
          left: 10px;
          top: 56px;
        }

        .conflict-columns {
          flex-direction: column;
        }
      }

      /* ── Shortcut Cheatsheet Overlay ── */
      .shortcut-cheatsheet {
        position: absolute;
        inset: 0;
        z-index: 30;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        background: rgba(0, 0, 0, 0.45);
        backdrop-filter: blur(4px);
        pointer-events: none;
      }
      .shortcut-cheatsheet:not([hidden]) {
        display: flex;
        pointer-events: auto;
      }
      .cheatsheet-header {
        font-size: 18px;
        font-weight: 700;
        color: #fff;
        margin-bottom: 12px;
        letter-spacing: 0.04em;
      }
      .cheatsheet-body {
        display: flex;
        gap: 32px;
        background: #fff;
        border-radius: 12px;
        padding: 20px 28px;
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
        max-height: 80vh;
        overflow-y: auto;
      }
      .cheatsheet-col {
        display: flex;
        flex-direction: column;
        gap: 16px;
        min-width: 220px;
      }
      .cheatsheet-group-title {
        font-size: 11px;
        font-weight: 700;
        text-transform: uppercase;
        color: var(--accent);
        letter-spacing: 0.08em;
        margin-bottom: 4px;
      }
      .cheatsheet-row {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 13px;
        color: var(--ink);
        line-height: 1.7;
      }
      .cheatsheet-row kbd {
        display: inline-block;
        min-width: 24px;
        padding: 1px 6px;
        background: #f0f0f0;
        border: 1px solid #d0d0d0;
        border-radius: 4px;
        font-family: inherit;
        font-size: 12px;
        text-align: center;
        color: #333;
        box-shadow: 0 1px 0 #bbb;
      }
      .cheatsheet-row span {
        color: #555;
      }
      .cheatsheet-automaton {
        display: flex;
        align-items: center;
        gap: 0;
        margin-top: 14px;
        background: #fff;
        border-radius: 10px;
        padding: 14px 24px;
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
      }
      .automaton-node {
        width: 96px;
        height: 96px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 11px;
        font-weight: 700;
        letter-spacing: 0.03em;
        flex-shrink: 0;
        border: 3px solid;
      }
      .automaton-navigating {
        border-color: var(--accent, #4a7adb);
        color: var(--accent, #4a7adb);
        background: rgba(74, 122, 219, 0.08);
      }
      .automaton-editing {
        border-color: #e67e22;
        color: #e67e22;
        background: rgba(230, 126, 34, 0.08);
      }
      .automaton-arrows {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 4px;
        width: 160px;
        flex-shrink: 0;
      }
      .automaton-arrow {
        display: flex;
        flex-direction: column;
        align-items: center;
        width: 100%;
      }
      .automaton-label {
        font-size: 9px;
        color: #666;
        white-space: nowrap;
        line-height: 1.3;
      }
      .automaton-svg {
        width: 100%;
        height: 12px;
      }
      .automaton-svg path {
        stroke: #888;
        stroke-width: 1.5;
        fill: none;
      }
      .automaton-svg polygon {
        fill: #888;
      }
      .automaton-self-loop {
        display: flex;
        flex-direction: row;
        align-items: center;
        margin-left: -4px;
      }
      .automaton-self-loop .automaton-label {
        text-align: left;
      }
      .automaton-self-svg {
        width: 24px;
        height: 80px;
        flex-shrink: 0;
      }
      .automaton-self-svg path {
        stroke: #e67e22;
        stroke-width: 1.5;
        fill: none;
      }
      .automaton-self-svg polygon {
        fill: #e67e22;
      }
      .cheatsheet-hint {
        margin-top: 10px;
        font-size: 12px;
        color: rgba(255, 255, 255, 0.7);
      }

      /* ── Home Screen ── */
      .home-screen {
        position: absolute;
        inset: 0;
        z-index: 10;
        display: flex;
        flex-direction: column;
        background: rgba(255, 255, 255, 0.92);
        backdrop-filter: blur(12px);
        overflow-y: auto;
        pointer-events: auto;
      }

      .home-screen[hidden] {
        display: none;
      }

      .home-header {
        flex-shrink: 0;
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 20px 28px 12px;
        border-bottom: 1px solid #e8e8e8;
      }

      .home-title {
        margin: 0;
        font-size: 22px;
        font-weight: 700;
        color: var(--accent);
        letter-spacing: 0.02em;
      }

      .home-body {
        flex: 1;
        padding: 20px 28px;
        max-width: 800px;
      }

      .home-section-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        margin-bottom: 12px;
      }

      .home-section-title {
        font-size: 14px;
        font-weight: 700;
        text-transform: uppercase;
        letter-spacing: 0.06em;
        color: #888;
      }

      .home-scope-tree {
        display: flex;
        flex-direction: column;
        gap: 0;
      }

      .home-scope-row {
        display: flex;
        align-items: center;
        gap: 8px;
        padding: 8px 12px;
        border-radius: 8px;
        cursor: pointer;
        user-select: none;
        transition: background 0.1s ease;
      }

      .home-scope-row:hover {
        background: rgba(122, 53, 255, 0.06);
      }

      .home-scope-row:active {
        background: rgba(122, 53, 255, 0.12);
      }

      .home-scope-toggle {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 20px;
        height: 20px;
        font-size: 12px;
        color: #999;
        flex-shrink: 0;
        transition: transform 0.15s ease;
        border: none;
        background: none;
        padding: 0;
        cursor: pointer;
      }

      .home-scope-toggle.expanded {
        transform: rotate(90deg);
      }

      .home-scope-toggle.no-children {
        visibility: hidden;
      }

      .home-scope-name {
        font-size: 15px;
        font-weight: 500;
        color: var(--ink);
        flex: 1;
        min-width: 0;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
      }

      .home-scope-count {
        font-size: 12px;
        color: #999;
        flex-shrink: 0;
      }

      .home-scope-children {
        padding-left: 20px;
      }

      .home-scope-children[hidden] {
        display: none;
      }

      .home-breadcrumb {
        display: flex;
        align-items: center;
        gap: 4px;
        padding: 4px 0 8px;
        font-size: 12px;
        color: #888;
        flex-shrink: 0;
      }

      .home-breadcrumb-item {
        cursor: pointer;
        color: var(--accent);
        text-decoration: none;
        border: none;
        background: none;
        padding: 2px 4px;
        border-radius: 4px;
        font-size: 12px;
        font-family: inherit;
      }

      .home-breadcrumb-item:hover {
        background: var(--accent-soft);
      }

      .home-breadcrumb-item.current {
        color: var(--ink);
        cursor: default;
        font-weight: 600;
      }

      .home-breadcrumb-item.current:hover {
        background: transparent;
      }

      .home-breadcrumb-sep {
        color: #ccc;
        user-select: none;
      }

      /* ── Scope Lock Indicators ── */
      .node-visual-box.scope-locked {
        stroke: #c5890a;
        stroke-width: 2.5;
        stroke-dasharray: none;
      }

      .node-visual-box.scope-locked-by-other {
        stroke: #d64b4b;
        stroke-width: 2.5;
      }

      .lock-icon {
        font-size: 12px;
        fill: #c5890a;
        pointer-events: none;
      }

      .lock-icon-other {
        fill: #d64b4b;
      }

      .entity-scope-lock-badge {
        font-size: 9px;
        font-weight: 600;
        padding: 1px 4px;
        border-radius: 3px;
        flex-shrink: 0;
        margin-left: auto;
      }

      .entity-scope-lock-badge.lock-own {
        background: #fff3e2;
        color: #9a6b1f;
      }

      .entity-scope-lock-badge.lock-other {
        background: #ffe5e5;
        color: #c0392b;
      }

      .entity-scope-lock-tooltip {
        font-size: 10px;
        color: #999;
        margin-left: 4px;
        flex-shrink: 0;
      }

      /* Lock/Unlock action buttons in entity scope list */
      .entity-scope-lock-btn {
        font-size: 10px;
        padding: 1px 6px;
        border: 1px solid #ddd;
        border-radius: 4px;
        background: #fff;
        cursor: pointer;
        flex-shrink: 0;
        margin-left: 4px;
        line-height: 1.4;
        color: var(--ink);
        opacity: 0;
        transition: opacity 0.12s ease;
      }

      .entity-scope-row:hover .entity-scope-lock-btn {
        opacity: 1;
      }

      .entity-scope-lock-btn:hover {
        background: var(--accent-soft);
        border-color: var(--accent);
      }

      .entity-scope-lock-btn.unlock-btn {
        color: var(--danger);
        border-color: #f0c0c0;
      }

      .entity-scope-lock-btn.unlock-btn:hover {
        background: #ffe5e5;
      }

      /* ── Broken Alias Indicators ── */
      .entity-badge-broken {
        background: #ffe5e5;
        color: #c0392b;
      }

      .entity-row.alias-broken-row {
        background: rgba(214, 75, 75, 0.06);
      }

      .entity-alias-action-btn {
        font-size: 10px;
        padding: 1px 5px;
        border: 1px solid #ddd;
        border-radius: 4px;
        background: #fff;
        cursor: pointer;
        flex-shrink: 0;
        margin-left: 2px;
        line-height: 1.4;
        opacity: 0;
        transition: opacity 0.12s ease;
      }

      .entity-row:hover .entity-alias-action-btn {
        opacity: 1;
      }

      .entity-alias-action-btn.repair-btn {
        color: #2f5fd9;
        border-color: #b8ccf0;
      }

      .entity-alias-action-btn.repair-btn:hover {
        background: #e8f0ff;
      }

      .entity-alias-action-btn.delete-btn {
        color: var(--danger);
        border-color: #f0c0c0;
      }

      .entity-alias-action-btn.delete-btn:hover {
        background: #ffe5e5;
      }

      /* ── Context Menu ── */
      .scope-context-menu {
        position: fixed;
        z-index: 100;
        background: #fff;
        border: 1px solid #ddd;
        border-radius: 8px;
        box-shadow: 0 4px 16px rgba(0,0,0,0.12);
        padding: 4px 0;
        min-width: 160px;
      }

      .scope-context-menu-item {
        display: flex;
        align-items: center;
        gap: 8px;
        padding: 6px 14px;
        font-size: 13px;
        cursor: pointer;
        color: var(--ink);
        user-select: none;
        transition: background 0.08s ease;
      }

      .scope-context-menu-item:hover {
        background: rgba(122, 53, 255, 0.06);
      }

      .scope-context-menu-item.danger {
        color: var(--danger);
      }

      .scope-context-menu-item.danger:hover {
        background: #ffe5e5;
      }

      .scope-context-menu-sep {
        height: 1px;
        background: #eee;
        margin: 3px 8px;
      }

      /* ── Trial: scope routing switcher ── */
      .routing-switcher {
        position: fixed;
        inset: 0;
        z-index: 96;
        display: grid;
        place-items: center;
        background: rgba(246, 247, 249, 0.42);
        backdrop-filter: blur(6px);
        pointer-events: none;
      }

      .routing-switcher[hidden] {
        display: none;
      }

      .routing-switcher-panel {
        width: min(780px, calc(100vw - 48px));
        border: 1px solid rgba(31, 41, 55, 0.18);
        border-radius: 8px;
        background: rgba(255, 255, 255, 0.92);
        box-shadow: 0 24px 60px rgba(31, 41, 55, 0.2);
        padding: 14px;
        pointer-events: auto;
      }

      .routing-switcher-head,
      .routing-switcher-foot {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 12px;
        color: #6d7480;
        font-size: 12px;
      }

      .routing-switcher-head strong {
        min-width: 0;
        overflow: hidden;
        color: #1d2129;
        font-size: 14px;
        text-overflow: ellipsis;
        white-space: nowrap;
      }

      .routing-scope-surface {
        display: block;
        width: 100%;
        height: 430px;
        margin: 14px 0;
        overflow: hidden;
        border: 1px solid rgba(216, 221, 229, 0.86);
        border-radius: 8px;
        background:
          linear-gradient(#e6e9ef 1px, transparent 1px),
          linear-gradient(90deg, #e6e9ef 1px, transparent 1px),
          rgba(248, 250, 252, 0.92);
        background-size: 36px 36px;
      }

      .routing-surface-scope,
      .routing-surface-node,
      .routing-surface-label {
        cursor: pointer;
      }

      .routing-surface-node {
        fill: rgba(255, 255, 255, 0.96);
        stroke: #d8dde5;
        filter: drop-shadow(0 8px 12px rgba(31, 41, 55, 0.12));
      }

      .routing-surface-node.primary-selected {
        fill: var(--accent-soft);
        stroke: var(--accent);
        stroke-width: 3;
      }

      .routing-surface-node.routing-disabled {
        fill: rgba(246, 247, 249, 0.82);
        stroke: #c8ced8;
        stroke-dasharray: 6 4;
      }

      .routing-surface-label {
        fill: #232323;
        font-weight: 560;
        pointer-events: none;
      }

      .routing-surface-label.primary-selected {
        fill: #6f39ff;
      }

      .routing-surface-edge {
        stroke: #b9c1cd;
        stroke-width: 2.5;
        fill: none;
      }

      /* ── Color Palette Popover (Miro-style node decoration) ── */
      .color-palette-popover {
        position: fixed;
        z-index: 100;
        background: #fff;
        border: 1px solid #ddd;
        border-radius: 10px;
        box-shadow: 0 4px 16px rgba(0,0,0,0.14);
        padding: 8px;
        display: grid;
        grid-template-columns: repeat(5, 24px);
        gap: 6px;
      }

      .color-palette-swatch {
        width: 24px;
        height: 24px;
        border-radius: 50%;
        border: 1px solid rgba(0,0,0,0.18);
        cursor: pointer;
        padding: 0;
        transition: transform 0.08s ease, box-shadow 0.08s ease;
      }

      .color-palette-swatch:hover {
        transform: scale(1.15);
        box-shadow: 0 2px 6px rgba(0,0,0,0.18);
      }

      .color-palette-swatch.clear {
        background: #fff;
        color: #888;
        font-size: 12px;
        line-height: 1;
      }

      /* Hide board and linear panel when home screen is visible */
      .app.home-active .workspace {
        visibility: hidden;
      }

      @media (max-width: 900px) {
        .label-root,
        .label-node {
          /* font-size now controlled by inline SVG attribute from tuning constants */
        }
      }

      /* ------------------------------------------------------------------
         Markdown preview panel (Alt+D)
         ------------------------------------------------------------------ */
      .markdown-preview-panel {
        position: absolute;
        top: 60px;
        right: 14px;
        z-index: 13;
        width: 420px;
        max-width: calc(100vw - 40px);
        max-height: calc(100vh - 90px);
        display: flex;
        flex-direction: column;
        border: 1px solid #ddd;
        border-radius: 14px;
        background: rgba(255, 255, 255, 0.97);
        backdrop-filter: blur(10px);
        box-shadow: 0 12px 34px rgba(24, 24, 24, 0.16);
        pointer-events: auto;
        overflow: hidden;
      }

      .markdown-preview-panel[hidden] {
        display: none;
      }

      .markdown-preview-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 10px 14px;
        border-bottom: 1px solid #e8e8e8;
        flex-shrink: 0;
      }

      .markdown-preview-title {
        font-size: 13px;
        font-weight: 700;
        text-transform: uppercase;
        letter-spacing: 0.06em;
        color: var(--accent, #3b6ea8);
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
      }

      .markdown-preview-close {
        background: transparent;
        border: none;
        font-size: 20px;
        line-height: 1;
        cursor: pointer;
        color: #666;
        padding: 0 4px;
      }

      .markdown-preview-close:hover {
        color: #000;
      }

      .markdown-preview-body {
        padding: 12px 16px;
        overflow: auto;
        font-size: 13px;
        line-height: 1.55;
        color: #222;
      }

      .markdown-preview-body h1,
      .markdown-preview-body h2,
      .markdown-preview-body h3,
      .markdown-preview-body h4,
      .markdown-preview-body h5,
      .markdown-preview-body h6 {
        margin: 0.8em 0 0.4em;
        line-height: 1.25;
      }

      .markdown-preview-body h1 { font-size: 1.45em; }
      .markdown-preview-body h2 { font-size: 1.25em; }
      .markdown-preview-body h3 { font-size: 1.1em; }

      .markdown-preview-body p {
        margin: 0.5em 0;
      }

      .markdown-preview-body code {
        background: #f2f2f2;
        padding: 1px 4px;
        border-radius: 3px;
        font-family: "Menlo", "Consolas", monospace;
        font-size: 0.92em;
      }

      .markdown-preview-body pre {
        background: #f6f6f6;
        border: 1px solid #e4e4e4;
        border-radius: 6px;
        padding: 10px 12px;
        overflow: auto;
        font-size: 0.88em;
      }

      .markdown-preview-body pre code {
        background: transparent;
        padding: 0;
      }

      .markdown-preview-body blockquote {
        border-left: 3px solid #c6d2e0;
        margin: 0.6em 0;
        padding: 0.1em 0.9em;
        color: #555;
        background: #f7f9fc;
      }

      .markdown-preview-body ul,
      .markdown-preview-body ol {
        padding-left: 1.5em;
        margin: 0.4em 0;
      }

      .markdown-preview-body a {
        color: #2a6ac1;
        text-decoration: underline;
      }

      .markdown-preview-body img {
        max-width: 100%;
      }

      .markdown-preview-body hr {
        border: 0;
        border-top: 1px solid #e0e0e0;
        margin: 0.8em 0;
      }

      .markdown-mermaid {
        margin: 0.6em 0;
        text-align: center;
      }

      .markdown-mermaid svg {
        max-width: 100%;
        height: auto;
      }

      .markdown-mermaid-fallback,
      .markdown-mermaid-error {
        text-align: left;
      }

      .markdown-mermaid-error-msg {
        color: #b84a4a;
        font-size: 0.85em;
        margin-top: 4px;
      }

      .home-page {
        margin: 0;
        background: #fafafa;
        color: var(--ink);
        font-family: inherit;
        min-height: 100vh;
        overflow: auto;
      }

      .home-top {
        position: sticky;
        top: 0;
        z-index: 10;
        background: rgba(255, 255, 255, 0.92);
        backdrop-filter: blur(10px);
        border-bottom: 1px solid #e8e8e8;
      }

      .home-top-inner {
        max-width: 1080px;
        margin: 0 auto;
        padding: 14px 28px;
        display: flex;
        align-items: center;
        gap: 16px;
      }

      .home-logo {
        font-size: 22px;
        font-weight: 700;
        color: var(--accent);
        letter-spacing: 0.02em;
        text-decoration: none;
        cursor: default;
      }

      .home-top-spacer {
        flex: 1;
      }

      .home-main {
        max-width: 1080px;
        margin: 0 auto;
        padding: 28px;
        display: flex;
        flex-direction: column;
        gap: 36px;
      }

      .home-section {
        display: flex;
        flex-direction: column;
        gap: 12px;
      }

      .home-section-head {
        display: flex;
        align-items: center;
        gap: 12px;
        justify-content: space-between;
        flex-wrap: wrap;
      }

      .home-section-title {
        margin: 0;
        font-size: 13px;
        font-weight: 700;
        text-transform: uppercase;
        letter-spacing: 0.08em;
        color: #888;
        display: inline-flex;
        align-items: center;
        gap: 6px;
      }

      .home-section-icon {
        color: #f0ad00;
        font-size: 14px;
      }

      .home-create-grid {
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 12px;
      }

      @media (max-width: 780px) {
        .home-create-grid {
          grid-template-columns: 1fr;
        }
      }

      .home-create-card {
        display: flex;
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
        padding: 20px;
        border: 1px dashed #cfcfd6;
        border-radius: 14px;
        background: #fff;
        cursor: pointer;
        transition: border-color 0.12s ease, box-shadow 0.12s ease, transform 0.05s ease;
        text-align: left;
        font: inherit;
        color: inherit;
      }

      .home-create-card:hover {
        border-color: var(--accent);
        box-shadow: 0 6px 18px rgba(122, 53, 255, 0.08);
      }

      .home-create-card:active {
        transform: translateY(1px);
      }

      .home-create-icon {
        font-size: 22px;
      }

      .home-create-label {
        font-size: 15px;
        font-weight: 600;
      }

      .home-create-sub {
        font-size: 12px;
        color: #888;
      }

      .home-pinned-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 12px;
      }

      .home-pinned-card {
        display: flex;
        flex-direction: column;
        gap: 6px;
        padding: 14px;
        border: 1px solid #e6e6ea;
        border-radius: 12px;
        background: #fff;
        cursor: pointer;
        transition: border-color 0.12s ease, box-shadow 0.12s ease;
      }

      .home-pinned-card:hover {
        border-color: var(--accent);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
      }

      .home-pinned-icon {
        font-size: 22px;
      }

      .home-pinned-label {
        font-size: 14px;
        font-weight: 600;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
      }

      .home-pinned-meta {
        font-size: 11px;
        color: #888;
      }

      .home-search {
        min-width: 220px;
        padding: 8px 12px;
        border: 1px solid #ddd;
        border-radius: 10px;
        background: #fff;
        font: inherit;
      }

      .home-search:focus {
        outline: none;
        border-color: var(--accent);
        box-shadow: 0 0 0 3px rgba(122, 53, 255, 0.14);
      }

      .home-map-list {
        display: flex;
        flex-direction: column;
        gap: 0;
        border: 1px solid #e6e6ea;
        border-radius: 12px;
        background: #fff;
        overflow: hidden;
      }

      .home-map-row {
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 12px 14px;
        border-bottom: 1px solid #f0f0f3;
      }

      .home-map-row:last-child {
        border-bottom: none;
      }

      .home-map-row:hover {
        background: #fafafb;
      }

      .home-map-row.is-archived {
        opacity: 0.72;
      }

      .home-map-pin {
        width: 28px;
        height: 28px;
        border: none;
        background: none;
        cursor: pointer;
        font-size: 18px;
        color: #bbb;
        flex-shrink: 0;
        border-radius: 6px;
      }

      .home-map-pin:hover {
        background: rgba(240, 173, 0, 0.14);
        color: #f0ad00;
      }

      .home-map-pin.is-pinned {
        color: #f0ad00;
      }

      .home-map-icon {
        font-size: 18px;
        flex-shrink: 0;
      }

      .home-map-body {
        flex: 1;
        min-width: 0;
        display: flex;
        flex-direction: column;
        gap: 2px;
      }

      .home-map-label {
        font-size: 15px;
        font-weight: 600;
        color: var(--ink);
        text-decoration: none;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
      }

      .home-map-label:hover {
        color: var(--accent);
        text-decoration: underline;
      }

      .home-map-meta {
        font-size: 12px;
        color: #888;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
      }

      .home-map-actions {
        display: flex;
        align-items: center;
        gap: 4px;
        flex-shrink: 0;
      }

      .home-map-action {
        padding: 5px 10px;
        border: 1px solid transparent;
        border-radius: 6px;
        background: none;
        cursor: pointer;
        font: inherit;
        font-size: 12px;
        color: #555;
      }

      .home-map-action:hover {
        background: #f0f0f3;
        border-color: #ddd;
      }

      .home-map-action.primary {
        border-color: var(--accent);
        color: var(--accent);
        font-weight: 600;
      }

      .home-map-action.primary:hover {
        background: var(--accent-soft);
      }

      .home-map-action.danger {
        color: #c33;
      }

      .home-map-action.danger:hover {
        background: rgba(204, 51, 51, 0.08);
        border-color: #d88;
      }

      .home-empty {
        padding: 40px;
        text-align: center;
        color: #888;
        font-size: 14px;
        border: 1px dashed #e0e0e5;
        border-radius: 12px;
        background: #fff;
      }

      .home-archived-toggle {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 8px 12px;
        border: none;
        background: none;
        cursor: pointer;
        font: inherit;
        font-size: 13px;
        font-weight: 600;
        color: #666;
        border-radius: 8px;
      }

      .home-archived-toggle:hover {
        background: #efeff2;
      }

      .home-archived-caret {
        display: inline-block;
        transition: transform 0.15s ease;
      }

      .home-archived-toggle.is-expanded .home-archived-caret {
        transform: rotate(90deg);
      }

      .home-archived-count {
        color: #888;
        font-weight: 500;
        font-size: 12px;
      }

      .home-map-list--archived {
        margin-top: 10px;
      }

      .home-status {
        position: fixed;
        bottom: 18px;
        right: 18px;
        padding: 10px 14px;
        border-radius: 8px;
        background: rgba(30, 30, 30, 0.92);
        color: #fff;
        font-size: 12px;
        max-width: 320px;
        pointer-events: none;
        transition: opacity 0.2s ease;
      }

      .home-status:empty {
        opacity: 0;
      }

      .home-menu {
        position: fixed;
        z-index: 100;
        display: flex;
        flex-direction: column;
        gap: 2px;
        padding: 6px;
        background: #fff;
        border: 1px solid #ddd;
        border-radius: 10px;
        box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
        min-width: 180px;
      }

      .home-menu[hidden] {
        display: none;
      }

      .home-menu-item {
        text-align: left;
        padding: 6px 10px;
        border: none;
        background: none;
        border-radius: 6px;
        cursor: pointer;
        font: inherit;
        font-size: 13px;
        color: #333;
      }

      .home-menu-item:hover {
        background: #f2f2f6;
      }

      .home-menu-item.danger {
        color: #c33;
      }

      .home-menu-item.danger:hover {
        background: rgba(204, 51, 51, 0.08);
      }

      .artifacts-page {
        margin: 0;
        background: #fafafa;
        color: var(--ink);
        font-family: inherit;
        min-height: 100vh;
        overflow: auto;
      }

      .artifacts-nav {
        display: flex;
        align-items: center;
        gap: 8px;
      }

      .artifacts-nav a {
        padding: 6px 10px;
        border-radius: 8px;
        color: #555;
        font-size: 13px;
        font-weight: 600;
        text-decoration: none;
      }

      .artifacts-nav a:hover,
      .artifacts-nav a[aria-current="page"] {
        background: #efeff2;
        color: var(--ink);
      }

      .artifacts-main {
        max-width: 1080px;
        margin: 0 auto;
        padding: 28px;
        display: flex;
        flex-direction: column;
        gap: 18px;
      }

      .artifacts-header {
        display: flex;
        align-items: flex-end;
        justify-content: space-between;
        gap: 18px;
        padding-bottom: 8px;
        border-bottom: 1px solid #e8e8e8;
      }

      .artifacts-header h1 {
        margin: 0;
        font-size: 28px;
        line-height: 1.1;
      }

      .artifacts-header p {
        margin: 8px 0 0;
        color: #777;
        font-size: 13px;
      }

      .artifacts-primary-link,
      .artifact-open {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        min-height: 32px;
        padding: 6px 12px;
        border: 1px solid var(--accent);
        border-radius: 7px;
        color: var(--accent);
        background: #fff;
        font: inherit;
        font-size: 13px;
        font-weight: 700;
        text-decoration: none;
        white-space: nowrap;
      }

      .artifacts-primary-link:hover,
      .artifact-open:hover {
        background: var(--accent-soft);
      }

      .artifacts-controls {
        display: grid;
        grid-template-columns: minmax(0, 1fr) 160px;
        gap: 10px;
      }

      .artifacts-search,
      .artifacts-kind {
        min-height: 38px;
        padding: 8px 12px;
        border: 1px solid #ddd;
        border-radius: 8px;
        background: #fff;
        color: var(--ink);
        font: inherit;
      }

      .artifacts-search:focus,
      .artifacts-kind:focus {
        outline: none;
        border-color: var(--accent);
        box-shadow: 0 0 0 3px rgba(122, 53, 255, 0.14);
      }

      .artifacts-list {
        display: flex;
        flex-direction: column;
        border: 1px solid #e6e6ea;
        border-radius: 10px;
        background: #fff;
        overflow: hidden;
      }

      .artifact-row {
        display: grid;
        grid-template-columns: 68px minmax(0, 1fr) auto;
        align-items: center;
        gap: 14px;
        padding: 13px 14px;
        border-bottom: 1px solid #f0f0f3;
      }

      .artifact-row:last-child {
        border-bottom: none;
      }

      .artifact-row:hover {
        background: #fafafb;
      }

      .artifact-kind {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        min-width: 52px;
        min-height: 28px;
        padding: 4px 8px;
        border-radius: 7px;
        background: #f0f3f6;
        color: #555;
        font-size: 11px;
        font-weight: 800;
      }

      .artifact-body {
        min-width: 0;
        display: flex;
        flex-direction: column;
        gap: 4px;
      }

      .artifact-title {
        color: var(--ink);
        font-size: 15px;
        font-weight: 700;
        text-decoration: none;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
      }

      .artifact-title:hover {
        color: var(--accent);
        text-decoration: underline;
      }

      .artifact-meta {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        color: #777;
        font-size: 12px;
      }

      .artifact-path {
        color: #999;
        font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
        font-size: 11px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
      }

      .fatal-load-error {
        position: fixed;
        top: 92px;
        left: 50%;
        z-index: 2000;
        width: min(680px, calc(100vw - 40px));
        transform: translateX(-50%);
        display: flex;
        flex-direction: column;
        gap: 12px;
        padding: 22px;
        border: 1px solid rgba(191, 47, 36, 0.34);
        border-radius: 8px;
        background: #fff;
        box-shadow: 0 18px 48px rgba(0, 0, 0, 0.18);
      }

      body.is-fatal-load-error #canvas > * {
        display: none;
      }

      body.is-fatal-load-error .workspace,
      body.is-fatal-load-error #workbench-root {
        visibility: hidden;
      }

      .fatal-load-error__eyebrow {
        color: var(--danger);
        font-size: 12px;
        font-weight: 800;
        text-transform: uppercase;
      }

      .fatal-load-error h1 {
        margin: 0;
        color: var(--ink);
        font-size: 22px;
        line-height: 1.2;
      }

      .fatal-load-error p {
        margin: 0;
        color: #555;
        line-height: 1.5;
      }

      .fatal-load-error code {
        display: block;
        padding: 10px;
        border-radius: 6px;
        background: #f7f8fa;
        color: #444;
        font-size: 12px;
        overflow-wrap: anywhere;
      }

      .fatal-load-error a {
        align-self: flex-start;
        padding: 7px 12px;
        border: 1px solid var(--accent);
        border-radius: 7px;
        color: var(--accent);
        background: #fff;
        font-weight: 700;
        text-decoration: none;
      }

      .fatal-load-error a:hover {
        background: var(--accent-soft);
      }

      @media (max-width: 700px) {
        .artifacts-header {
          align-items: flex-start;
          flex-direction: column;
        }

        .artifacts-controls {
          grid-template-columns: 1fr;
        }

        .artifact-row {
          grid-template-columns: 1fr;
          align-items: start;
        }

        .artifact-open {
          justify-self: start;
        }
      }

      .viewer-logo {
        font-size: 16px;
        font-weight: 700;
        color: var(--accent);
        letter-spacing: 0.02em;
        padding: 4px 8px;
        border-radius: 8px;
        text-decoration: none;
        pointer-events: auto;
      }

      .viewer-logo:hover {
        background: var(--accent-soft);
      }

      /* -- m3e: registered HTML object components -- */
      .m3e-component {
        box-sizing: border-box;
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
        color: #333;
      }

      .m3e-component--tabular {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
        font-size: 13px;
        overflow: auto;
        background: #fff;
        border: 1px solid #e0e0e0;
        border-radius: 8px;
        box-shadow: 0 2px 8px rgba(0,0,0,0.08);
      }

      .m3e-component--max-small {
        max-height: 360px;
      }

      .m3e-component--max-medium {
        max-height: 720px;
      }

      .m3e-component--max-large {
        max-height: 960px;
      }

      .m3e-table-view {
        border-collapse: collapse;
        width: 100%;
      }
      .m3e-table-view th {
        background: #f5f5f7;
        border-bottom: 2px solid #ddd;
        padding: 6px 10px;
        text-align: left;
        font-weight: 600;
        font-size: 11px;
        text-transform: uppercase;
        letter-spacing: 0.04em;
        color: #555;
        position: sticky;
        top: 0;
        z-index: 1;
      }
      .m3e-table-view td {
        padding: 6px 10px;
        border-bottom: 1px solid #eee;
        color: #333;
        max-width: 300px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
      }

      .m3e-component--density-compact .m3e-table-view th,
      .m3e-component--density-compact .m3e-table-view td {
        padding: 4px 8px;
      }

      .m3e-table-view tr:hover {
        background: rgba(106, 53, 255, 0.04);
      }
      .m3e-table-view .m3e-table-name {
        font-weight: 500;
        color: #232323;
      }
      .m3e-table-view .m3e-table-empty {
        color: #777;
        font-style: italic;
        text-align: center;
      }
      .m3e-table-view tr.status-placeholder td { opacity: 0.5; }
      .m3e-table-view tr.status-confirmed td:first-child { border-left: 3px solid #2d8c4e; }
      .m3e-table-view tr.status-contested td:first-child { border-left: 3px solid #d94040; }
      .m3e-table-view tr.status-frozen td { opacity: 0.7; }
      .m3e-table-view tr.status-active td:first-child { border-left: 3px solid #e89b1a; }
      .m3e-table-view tr.status-review td:first-child { border-left: 3px solid #9b59b6; }

      :root[data-theme="dark"] body,
      :root[data-theme="dark"] .app {
        background-color: var(--grid-bg);
        color: var(--ink);
      }

      :root[data-theme="dark"] .toolbar,
      :root[data-theme="dark"] .scatter-toolbar,
      :root[data-theme="dark"] .draw-toolbar,
      :root[data-theme="dark"] .meta-panel,
      :root[data-theme="dark"] .hamburger-menu,
      :root[data-theme="dark"] .export-menu,
      :root[data-theme="dark"] .linear-adjust-controls,
      :root[data-theme="dark"] .template-completion-popover,
      :root[data-theme="dark"] .entity-list-panel,
      :root[data-theme="dark"] .conflict-panel,
      :root[data-theme="dark"] .v4-panel,
      :root[data-theme="dark"] .routing-switcher-panel,
      :root[data-theme="dark"] .color-palette-popover,
      :root[data-theme="dark"] .markdown-preview-panel,
      :root[data-theme="dark"] .home-screen,
      :root[data-theme="dark"] .fatal-load-error {
        border-color: rgba(148, 163, 184, 0.24);
        background: rgba(15, 23, 42, 0.94);
        box-shadow: 0 18px 42px rgba(0, 0, 0, 0.38);
        color: var(--ink);
      }

      :root[data-theme="dark"] .mode-switch,
      :root[data-theme="dark"] .scatter-range-control,
      :root[data-theme="dark"] .visual-check,
      :root[data-theme="dark"] .conflict-col,
      :root[data-theme="dark"] .conflict-diff,
      :root[data-theme="dark"] .v4-card,
      :root[data-theme="dark"] .v4-panel-header,
      :root[data-theme="dark"] .v4-list,
      :root[data-theme="dark"] .routing-scope-surface,
      :root[data-theme="dark"] .markdown-preview-body code,
      :root[data-theme="dark"] .markdown-preview-body pre,
      :root[data-theme="dark"] .markdown-preview-body blockquote,
      :root[data-theme="dark"] .m3e-component--tabular {
        border-color: rgba(148, 163, 184, 0.22);
        background: rgba(30, 41, 59, 0.78);
        color: var(--ink);
      }

      :root[data-theme="dark"] button,
      :root[data-theme="dark"] select,
      :root[data-theme="dark"] input[type="file"],
      :root[data-theme="dark"] input[type="text"],
      :root[data-theme="dark"] input[type="password"],
      :root[data-theme="dark"] textarea,
      :root[data-theme="dark"] .tool-btn,
      :root[data-theme="dark"] .draw-tool-btn {
        border-color: rgba(148, 163, 184, 0.3);
        background: rgba(30, 41, 59, 0.88);
        color: var(--ink);
      }

      :root[data-theme="dark"] button:hover,
      :root[data-theme="dark"] .entity-list-close:hover,
      :root[data-theme="dark"] .conflict-close:hover,
      :root[data-theme="dark"] .v4-panel-close:hover,
      :root[data-theme="dark"] .markdown-preview-close:hover,
      :root[data-theme="dark"] .home-scope-row:hover {
        background: rgba(148, 163, 184, 0.14);
        color: #f8fafc;
      }

      :root[data-theme="dark"] button.primary,
      :root[data-theme="dark"] .mode-btn.is-active,
      :root[data-theme="dark"] .tool-btn.is-active,
      :root[data-theme="dark"] .draw-tool-btn.is-active,
      :root[data-theme="dark"] .scatter-tool-btn.is-active,
      :root[data-theme="dark"] .entity-row.is-selected {
        border-color: var(--accent);
        background: var(--accent-soft);
        color: #ddd6fe;
      }

      :root[data-theme="dark"] .board {
        border-color: rgba(148, 163, 184, 0.18);
        background: rgba(2, 6, 23, 0.2);
      }

      :root[data-theme="dark"] .linear-menu-toggle,
      :root[data-theme="dark"] .linear-text,
      :root[data-theme="dark"] body.readonly-link .linear-text {
        border-color: var(--accent);
        background: rgba(15, 23, 42, 0.95);
        color: #f8fafc;
        box-shadow: 0 12px 24px rgba(0, 0, 0, 0.36);
        caret-color: #f8fafc;
      }

      :root[data-theme="dark"] .meta,
      :root[data-theme="dark"] .shortcuts,
      :root[data-theme="dark"] .status,
      :root[data-theme="dark"] .visual-check,
      :root[data-theme="dark"] .menu-meta,
      :root[data-theme="dark"] .conflict-col-header,
      :root[data-theme="dark"] .v4-status-line,
      :root[data-theme="dark"] .v4-path,
      :root[data-theme="dark"] .home-section-title,
      :root[data-theme="dark"] .home-scope-count,
      :root[data-theme="dark"] .home-breadcrumb,
      :root[data-theme="dark"] .markdown-preview-body,
      :root[data-theme="dark"] .m3e-table-view td {
        color: #cbd5e1;
      }

      :root[data-theme="dark"] .root-box,
      :root[data-theme="dark"] .node-shape,
      :root[data-theme="dark"] .folder-box,
      :root[data-theme="dark"] .mindmap-box,
      :root[data-theme="dark"] .flow-preview-node,
      :root[data-theme="dark"] .node-visual-box,
      :root[data-theme="dark"] .routing-surface-node,
      :root[data-theme="dark"] .scatter-node-circle {
        fill: rgba(15, 23, 42, 0.96);
        stroke: rgba(167, 139, 250, 0.86);
      }

      :root[data-theme="dark"] .surface-scope-box {
        fill: rgba(15, 23, 42, 0.42);
        stroke: rgba(167, 139, 250, 0.46);
      }

      :root[data-theme="dark"] .node-visual-box.selected,
      :root[data-theme="dark"] .node-visual-box.multi-selected,
      :root[data-theme="dark"] .node-visual-box.primary-selected,
      :root[data-theme="dark"] .routing-surface-node.primary-selected,
      :root[data-theme="dark"] .scatter-node-circle.selected,
      :root[data-theme="dark"] .scatter-node-circle.primary-selected {
        fill: rgba(124, 58, 237, 0.28);
        stroke: var(--accent);
      }

      :root[data-theme="dark"] .label-root,
      :root[data-theme="dark"] .label-node,
      :root[data-theme="dark"] .flow-preview-node-label,
      :root[data-theme="dark"] .routing-surface-label,
      :root[data-theme="dark"] .scatter-label,
      :root[data-theme="dark"] .annotation-text,
      :root[data-theme="dark"] .latex-node-content,
      :root[data-theme="dark"] .m3e-table-view .m3e-table-name {
        fill: #f8fafc;
        color: #f8fafc;
        stroke: rgba(15, 23, 42, 0.72);
        stroke-width: 3px;
        stroke-linejoin: round;
        paint-order: stroke;
      }

      :root[data-theme="dark"] .edge-label,
      :root[data-theme="dark"] .graph-link-label,
      :root[data-theme="dark"] .flow-preview-edge-label,
      :root[data-theme="dark"] .surface-scope-title {
        fill: #c4b5fd;
      }

      :root[data-theme="dark"] .graph-link-label-bg,
      :root[data-theme="dark"] .annotation-text-bg {
        fill: rgba(15, 23, 42, 0.9);
        stroke: rgba(167, 139, 250, 0.28);
      }

      :root[data-theme="dark"] .edge,
      :root[data-theme="dark"] .graph-link,
      :root[data-theme="dark"] .flow-preview-edge,
      :root[data-theme="dark"] .routing-surface-edge {
        stroke: rgba(148, 163, 184, 0.76);
      }

      :root[data-theme="dark"] .template-completion-input {
        background: rgba(15, 23, 42, 0.96);
        color: var(--ink);
      }

      :root[data-theme="dark"] .template-completion-item {
        color: var(--ink);
      }

      :root[data-theme="dark"] .template-completion-item small,
      :root[data-theme="dark"] .m3e-table-view .m3e-table-empty {
        color: #94a3b8;
      }

      :root[data-theme="dark"] .template-completion-item.is-selected {
        background: #4f46e5;
        color: #ffffff;
      }

      :root[data-theme="dark"] .entity-list-header,
      :root[data-theme="dark"] .conflict-header,
      :root[data-theme="dark"] .markdown-preview-header,
      :root[data-theme="dark"] .m3e-table-view th {
        border-color: rgba(148, 163, 184, 0.2);
        background: rgba(15, 23, 42, 0.72);
        color: #e2e8f0;
      }

      :root[data-theme="dark"] .m3e-table-view td {
        border-color: rgba(148, 163, 184, 0.18);
      }

      :root[data-theme="dark"] .m3e-table-view tr:hover {
        background: rgba(167, 139, 250, 0.1);
      }

      :root[data-theme="neon"] {
        color-scheme: dark;
        --grid-bg: #05070f;
        --grid-line: rgba(46, 252, 255, 0.095);
        --ink: #eef7ff;
        --accent: #2efcff;
        --accent-soft: rgba(46, 252, 255, 0.17);
        --danger: #ff4f8d;
        --status-ink: #a9c8d8;
        --neon-panel: rgba(5, 10, 24, 0.72);
        --neon-panel-strong: rgba(8, 16, 38, 0.9);
        --neon-border: rgba(46, 252, 255, 0.28);
        --neon-branch-glow: #2efcff;
        --neon-branch-fill: rgba(46, 252, 255, 0.12);
        --neon-branch-stroke: rgba(46, 252, 255, 0.86);
      }

      @keyframes neon-nebula-drift {
        0% { transform: translate3d(-2%, -2%, 0) scale(1); opacity: 0.72; }
        50% { transform: translate3d(2%, 1%, 0) scale(1.04); opacity: 0.95; }
        100% { transform: translate3d(-2%, -2%, 0) scale(1); opacity: 0.72; }
      }

      @keyframes neon-grid-drift {
        0% { background-position: 0 0, 0 0; }
        100% { background-position: 72px 36px, 72px 36px; }
      }

      @keyframes neon-selected-breathe {
        0%, 100% { opacity: 0.94; filter: url("#neon-node-glow") drop-shadow(0 0 8px var(--neon-branch-glow)); }
        50% { opacity: 1; filter: url("#neon-node-glow") drop-shadow(0 0 20px var(--neon-branch-glow)); }
      }

      @keyframes neon-edge-shimmer {
        0%, 100% { opacity: 0.7; filter: url("#neon-edge-glow") drop-shadow(0 0 4px var(--neon-branch-glow)); }
        50% { opacity: 1; filter: url("#neon-edge-glow") drop-shadow(0 0 12px var(--neon-branch-glow)); }
      }

      :root[data-theme="neon"] body,
      :root[data-theme="neon"] .app {
        background-color: #05070f;
        color: var(--ink);
      }

      :root[data-theme="neon"] body {
        font-family: "Segoe UI", "Yu Gothic UI", "Hiragino Sans", "Meiryo", sans-serif;
        letter-spacing: 0;
      }

      :root[data-theme="neon"] .app {
        background-image:
          linear-gradient(to right, rgba(46, 252, 255, 0.11) 1px, transparent 1px),
          linear-gradient(to bottom, rgba(255, 63, 221, 0.065) 1px, transparent 1px);
        background-size: 72px 72px;
        animation: neon-grid-drift 34s linear infinite;
      }

      :root[data-theme="neon"] .app::before {
        content: "";
        position: absolute;
        inset: -14%;
        z-index: 0;
        pointer-events: none;
        background:
          radial-gradient(circle at 18% 20%, rgba(46, 252, 255, 0.22), transparent 30%),
          radial-gradient(circle at 78% 18%, rgba(255, 63, 221, 0.18), transparent 27%),
          radial-gradient(circle at 58% 76%, rgba(255, 191, 71, 0.14), transparent 26%),
          radial-gradient(circle at 26% 82%, rgba(74, 255, 128, 0.13), transparent 24%);
        filter: blur(18px) saturate(1.25);
        animation: neon-nebula-drift 18s ease-in-out infinite;
      }

      :root[data-theme="neon"] .workspace,
      :root[data-theme="neon"] .overlay-ui {
        position: absolute;
      }

      :root[data-theme="neon"] .board {
        border-color: rgba(46, 252, 255, 0.18);
        background:
          radial-gradient(circle at 50% 42%, rgba(46, 252, 255, 0.05), transparent 45%),
          rgba(2, 5, 14, 0.22);
        box-shadow: inset 0 0 80px rgba(46, 252, 255, 0.055);
      }

      :root[data-theme="neon"] .toolbar,
      :root[data-theme="neon"] .scatter-toolbar,
      :root[data-theme="neon"] .draw-toolbar,
      :root[data-theme="neon"] .meta-panel,
      :root[data-theme="neon"] .hamburger-menu,
      :root[data-theme="neon"] .export-menu,
      :root[data-theme="neon"] .linear-adjust-controls,
      :root[data-theme="neon"] .template-completion-popover,
      :root[data-theme="neon"] .entity-list-panel,
      :root[data-theme="neon"] .conflict-panel,
      :root[data-theme="neon"] .v4-panel,
      :root[data-theme="neon"] .routing-switcher-panel,
      :root[data-theme="neon"] .color-palette-popover,
      :root[data-theme="neon"] .markdown-preview-panel,
      :root[data-theme="neon"] .home-screen,
      :root[data-theme="neon"] .fatal-load-error {
        border-color: var(--neon-border);
        background: linear-gradient(135deg, rgba(7, 13, 31, 0.86), rgba(4, 8, 20, 0.68));
        box-shadow: 0 0 0 1px rgba(46, 252, 255, 0.07), 0 18px 48px rgba(0, 0, 0, 0.62), 0 0 30px rgba(46, 252, 255, 0.08);
        color: var(--ink);
        backdrop-filter: blur(18px) saturate(1.35);
      }

      :root[data-theme="neon"] .mode-switch,
      :root[data-theme="neon"] .scatter-range-control,
      :root[data-theme="neon"] .visual-check,
      :root[data-theme="neon"] .conflict-col,
      :root[data-theme="neon"] .conflict-diff,
      :root[data-theme="neon"] .v4-card,
      :root[data-theme="neon"] .v4-panel-header,
      :root[data-theme="neon"] .v4-list,
      :root[data-theme="neon"] .routing-scope-surface,
      :root[data-theme="neon"] .markdown-preview-body code,
      :root[data-theme="neon"] .markdown-preview-body pre,
      :root[data-theme="neon"] .markdown-preview-body blockquote,
      :root[data-theme="neon"] .m3e-component--tabular {
        border-color: rgba(46, 252, 255, 0.18);
        background: rgba(7, 13, 31, 0.74);
        color: var(--ink);
      }

      :root[data-theme="neon"] button,
      :root[data-theme="neon"] select,
      :root[data-theme="neon"] input[type="file"],
      :root[data-theme="neon"] input[type="text"],
      :root[data-theme="neon"] input[type="password"],
      :root[data-theme="neon"] textarea,
      :root[data-theme="neon"] .tool-btn,
      :root[data-theme="neon"] .draw-tool-btn {
        border-color: rgba(46, 252, 255, 0.22);
        background: rgba(5, 12, 30, 0.78);
        color: #eafcff;
        box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.025), 0 0 14px rgba(46, 252, 255, 0.055);
      }

      :root[data-theme="neon"] button:hover,
      :root[data-theme="neon"] .entity-list-close:hover,
      :root[data-theme="neon"] .conflict-close:hover,
      :root[data-theme="neon"] .v4-panel-close:hover,
      :root[data-theme="neon"] .markdown-preview-close:hover,
      :root[data-theme="neon"] .home-scope-row:hover {
        border-color: rgba(46, 252, 255, 0.58);
        background: rgba(46, 252, 255, 0.12);
        color: #ffffff;
      }

      :root[data-theme="neon"] button.primary,
      :root[data-theme="neon"] .mode-btn.is-active,
      :root[data-theme="neon"] .tool-btn.is-active,
      :root[data-theme="neon"] .draw-tool-btn.is-active,
      :root[data-theme="neon"] .scatter-tool-btn.is-active,
      :root[data-theme="neon"] .entity-row.is-selected {
        border-color: var(--accent);
        background: linear-gradient(135deg, rgba(46, 252, 255, 0.22), rgba(255, 63, 221, 0.12));
        color: #ffffff;
        box-shadow: 0 0 20px rgba(46, 252, 255, 0.18);
      }

      :root[data-theme="neon"] .linear-menu-toggle,
      :root[data-theme="neon"] .linear-text,
      :root[data-theme="neon"] body.readonly-link .linear-text {
        border-color: rgba(46, 252, 255, 0.42);
        background: rgba(4, 9, 22, 0.92);
        color: #eef7ff;
        box-shadow: 0 0 28px rgba(46, 252, 255, 0.1), 0 18px 34px rgba(0, 0, 0, 0.56);
        caret-color: #2efcff;
      }

      :root[data-theme="neon"] .meta,
      :root[data-theme="neon"] .shortcuts,
      :root[data-theme="neon"] .status,
      :root[data-theme="neon"] .visual-check,
      :root[data-theme="neon"] .menu-meta,
      :root[data-theme="neon"] .conflict-col-header,
      :root[data-theme="neon"] .v4-status-line,
      :root[data-theme="neon"] .v4-path,
      :root[data-theme="neon"] .home-section-title,
      :root[data-theme="neon"] .home-scope-count,
      :root[data-theme="neon"] .home-breadcrumb,
      :root[data-theme="neon"] .markdown-preview-body,
      :root[data-theme="neon"] .m3e-table-view td {
        color: #aac7d7;
      }

      :root[data-theme="neon"] .neon-branch-root,
      :root[data-theme="neon"] .neon-branch-0 { --neon-branch-glow: #2efcff; --neon-branch-fill: rgba(46, 252, 255, 0.13); --neon-branch-stroke: rgba(46, 252, 255, 0.94); }
      :root[data-theme="neon"] .neon-branch-1 { --neon-branch-glow: #ff3fdd; --neon-branch-fill: rgba(255, 63, 221, 0.13); --neon-branch-stroke: rgba(255, 63, 221, 0.9); }
      :root[data-theme="neon"] .neon-branch-2 { --neon-branch-glow: #ffbf47; --neon-branch-fill: rgba(255, 191, 71, 0.13); --neon-branch-stroke: rgba(255, 191, 71, 0.9); }
      :root[data-theme="neon"] .neon-branch-3 { --neon-branch-glow: #4aff80; --neon-branch-fill: rgba(74, 255, 128, 0.12); --neon-branch-stroke: rgba(74, 255, 128, 0.88); }

      :root[data-theme="neon"] .root-box,
      :root[data-theme="neon"] .node-shape,
      :root[data-theme="neon"] .folder-box,
      :root[data-theme="neon"] .mindmap-box,
      :root[data-theme="neon"] .flow-preview-node,
      :root[data-theme="neon"] .node-visual-box,
      :root[data-theme="neon"] .routing-surface-node,
      :root[data-theme="neon"] .scatter-node-circle {
        fill: rgba(6, 14, 34, 0.82);
        stroke: var(--neon-branch-stroke);
        stroke-width: 2.5;
        filter: url("#neon-node-glow") drop-shadow(0 0 7px var(--neon-branch-glow));
        transition: transform 180ms ease, filter 220ms ease, opacity 220ms ease;
        transform-box: fill-box;
        transform-origin: center;
      }

      :root[data-theme="neon"] .node-hit:hover + .node-visual-box,
      :root[data-theme="neon"] .node-hit:hover + .root-box,
      :root[data-theme="neon"] .node-hit:hover + .node-shape,
      :root[data-theme="neon"] .node-hit:hover + .folder-box,
      :root[data-theme="neon"] .node-hit:hover + .scatter-node-circle {
        transform: scale(1.025);
        filter: url("#neon-node-glow") drop-shadow(0 0 18px var(--neon-branch-glow));
      }

      :root[data-theme="neon"] .surface-scope-box {
        fill: rgba(8, 15, 36, 0.38);
        stroke: rgba(46, 252, 255, 0.36);
        filter: drop-shadow(0 0 14px rgba(46, 252, 255, 0.12));
      }

      :root[data-theme="neon"] .node-visual-box.selected,
      :root[data-theme="neon"] .node-visual-box.multi-selected,
      :root[data-theme="neon"] .node-visual-box.primary-selected,
      :root[data-theme="neon"] .routing-surface-node.primary-selected,
      :root[data-theme="neon"] .scatter-node-circle.selected,
      :root[data-theme="neon"] .scatter-node-circle.primary-selected {
        fill: color-mix(in srgb, var(--neon-branch-fill) 78%, #ffffff 5%);
        stroke: var(--neon-branch-glow);
        animation: neon-selected-breathe 2.8s ease-in-out infinite;
      }

      :root[data-theme="neon"] .label-root,
      :root[data-theme="neon"] .label-node,
      :root[data-theme="neon"] .flow-preview-node-label,
      :root[data-theme="neon"] .routing-surface-label,
      :root[data-theme="neon"] .scatter-label,
      :root[data-theme="neon"] .annotation-text,
      :root[data-theme="neon"] .latex-node-content,
      :root[data-theme="neon"] .m3e-table-view .m3e-table-name {
        fill: #f4fbff;
        color: #f4fbff;
        stroke: rgba(2, 5, 14, 0.82);
        stroke-width: 3.5px;
        stroke-linejoin: round;
        paint-order: stroke;
        letter-spacing: 0;
        filter: drop-shadow(0 0 4px rgba(46, 252, 255, 0.22));
      }

      :root[data-theme="neon"] .edge,
      :root[data-theme="neon"] .graph-link,
      :root[data-theme="neon"] .flow-preview-edge,
      :root[data-theme="neon"] .routing-surface-edge {
        stroke: var(--neon-branch-stroke);
        stroke-width: 4;
        opacity: 0.92;
        filter: url("#neon-edge-glow") drop-shadow(0 0 7px var(--neon-branch-glow));
        animation: neon-edge-shimmer 4.8s ease-in-out infinite;
      }

      :root[data-theme="neon"] .graph-link-hit {
        stroke-width: 22;
      }

      :root[data-theme="neon"] .edge-label,
      :root[data-theme="neon"] .graph-link-label,
      :root[data-theme="neon"] .flow-preview-edge-label,
      :root[data-theme="neon"] .surface-scope-title {
        fill: #9ffcff;
        filter: drop-shadow(0 0 6px rgba(46, 252, 255, 0.38));
      }

      :root[data-theme="neon"] .graph-link-label-bg,
      :root[data-theme="neon"] .annotation-text-bg {
        fill: rgba(4, 9, 22, 0.86);
        stroke: rgba(46, 252, 255, 0.28);
      }

      :root[data-theme="neon"] .collapsed-badge,
      :root[data-theme="neon"] .collapsed-badge-node,
      :root[data-theme="neon"] .graph-link-port,
      :root[data-theme="neon"] .link-port-handle,
      :root[data-theme="neon"] .link-port-dot {
        fill: rgba(5, 12, 30, 0.95);
        stroke: var(--accent);
        filter: drop-shadow(0 0 9px rgba(46, 252, 255, 0.36));
      }

      :root[data-theme="neon"] .collapsed-badge-count,
      :root[data-theme="neon"] .mode-badge {
        color: #dffcff;
        fill: #dffcff;
        letter-spacing: 0;
      }

      :root[data-theme="neon"] .mode-badge {
        border-color: rgba(46, 252, 255, 0.48);
        background: rgba(5, 12, 30, 0.76);
        box-shadow: 0 0 22px rgba(46, 252, 255, 0.2);
      }

      :root[data-theme="neon"] .template-completion-input {
        background: rgba(5, 12, 30, 0.96);
        color: var(--ink);
      }

      :root[data-theme="neon"] .template-completion-item,
      :root[data-theme="neon"] .template-completion-item small,
      :root[data-theme="neon"] .m3e-table-view .m3e-table-empty {
        color: #aac7d7;
      }

      :root[data-theme="neon"] .entity-list-header,
      :root[data-theme="neon"] .conflict-header,
      :root[data-theme="neon"] .markdown-preview-header,
      :root[data-theme="neon"] .m3e-table-view th {
        border-color: rgba(46, 252, 255, 0.18);
        background: rgba(5, 12, 30, 0.78);
        color: #e9fbff;
      }

      :root[data-theme="neon"] .m3e-table-view td {
        border-color: rgba(46, 252, 255, 0.13);
      }

      :root[data-theme="neon"] .m3e-table-view tr:hover {
        background: rgba(46, 252, 255, 0.08);
      }

      @media (prefers-reduced-motion: reduce) {
        :root[data-theme="neon"] .app,
        :root[data-theme="neon"] .app::before,
        :root[data-theme="neon"] .edge,
        :root[data-theme="neon"] .graph-link,
        :root[data-theme="neon"] .flow-preview-edge,
        :root[data-theme="neon"] .routing-surface-edge,
        :root[data-theme="neon"] .node-visual-box.selected,
        :root[data-theme="neon"] .node-visual-box.multi-selected,
        :root[data-theme="neon"] .node-visual-box.primary-selected,
        :root[data-theme="neon"] .routing-surface-node.primary-selected,
        :root[data-theme="neon"] .scatter-node-circle.selected,
        :root[data-theme="neon"] .scatter-node-circle.primary-selected {
          animation: none;
        }
      }