/**
 * Cortex Gantt — redesign visuals (Phase 6).
 *
 * The DOM structure emitted by app/javascript/lib/cortex_gantt/renderer.js
 * stays identical (same .cortex-gantt__* class names, same IDs and data-
 * attributes); this file just re-skins it to match the redesign tokens in
 * stylesheets/redesign/tokens.css. Dark mode is handled by those tokens so
 * we no longer branch on prefers-color-scheme here.
 *
 * Color mapping for bar variants:
 *   --todo / --wham      → info (blue)
 *   --card / --boom      → success (green)
 *   --step / --whoosh    → warn (amber)
 *   --milestone          → accent (pink)
 *   --pow                → danger (overdue)
 *   --muted              → fg-faint fill (completed)
 */

@layer components {
  /* ==========================================================================
     Page wrapper + full-width toggle
     ========================================================================== */

  .gantt-container {
    display: flex;
    flex-direction: column;
    gap: 14px;
    width: 100%;
    transition:
      width var(--rd-dur) var(--rd-ease),
      margin var(--rd-dur) var(--rd-ease);
  }

  /* .rd-page > .gantt-container--full breakout rule lives in
     stylesheets/redesign/shell.css so it can reason about the page grid. */

  .gantt-page {
    display: flex;
    flex-direction: column;
    gap: 14px;
  }

  /* ==========================================================================
     Toolbar
     ========================================================================== */

  .gantt-toolbar {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
    align-items: center;
    gap: 14px;
    padding: 10px 14px;
    background: var(--rd-bg-raised);
    border: 1px solid var(--rd-border);
    border-radius: var(--rd-radius-lg);
  }

  .gantt-toolbar-left,
  .gantt-toolbar-right {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
  }

  .gantt-toolbar-left {
    justify-self: start;
  }

  .gantt-toolbar-center {
    display: flex;
    align-items: center;
    gap: 8px;
    justify-self: center;
  }

  .gantt-toolbar-right {
    justify-self: end;
  }

  @media (max-width: 900px) {
    .gantt-toolbar {
      display: flex;
      flex-direction: column;
      align-items: stretch;
    }
    .gantt-toolbar-left,
    .gantt-toolbar-center,
    .gantt-toolbar-right {
      justify-self: auto;
      justify-content: flex-start;
      flex-wrap: wrap;
    }
  }

  .gantt-count {
    font-size: var(--rd-text-sm);
    color: var(--rd-fg-muted);
  }

  /* View-mode segmented control — lives inside .rd-seg in the view. The
     legacy .gantt-view-modes selector is kept for the template-gantt page. */
  .gantt-view-modes {
    display: inline-flex;
    background: var(--rd-bg-sunken);
    border: 1px solid var(--rd-border);
    border-radius: 8px;
    padding: 2px;
    gap: 0;
  }
  .gantt-view-modes .rd-btn,
  .gantt-view-modes .btn {
    border: 0;
    background: transparent;
    padding: 4px 12px;
    min-height: 0;
    font-family: var(--rd-font-sans);
    font-size: var(--rd-text-sm);
    font-weight: 500;
    letter-spacing: 0;
    text-transform: none;
    border-radius: 6px;
    color: var(--rd-fg-muted);
    box-shadow: none;
    white-space: nowrap;
    transform: none;
  }
  .gantt-view-modes .rd-btn:hover,
  .gantt-view-modes .btn:hover {
    color: var(--rd-fg);
    background: transparent;
    transform: none;
    box-shadow: none;
  }
  .gantt-view-modes .rd-btn.active,
  .gantt-view-modes .btn.active,
  .gantt-view-modes [aria-pressed="true"] {
    background: var(--rd-bg-raised);
    color: var(--rd-fg);
    box-shadow: var(--rd-shadow-sm);
  }

  .gantt-save-actions {
    display: flex;
    gap: 6px;
  }

  .gantt-pending-indicator {
    display: inline-flex;
    align-items: center;
    gap: 6px;
  }

  .gantt-pending-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 18px;
    height: 18px;
    padding: 0 6px;
    font-size: var(--rd-text-xs);
    font-weight: 600;
    font-family: var(--rd-font-mono);
    color: var(--rd-warn);
    background: var(--rd-warn-soft);
    border-radius: var(--rd-radius-full);
  }

  .gantt-pending-text {
    font-size: var(--rd-text-sm);
    color: var(--rd-fg-muted);
  }

  /* ==========================================================================
     Chart container
     ========================================================================== */

  .gantt-chart-container {
    min-height: 400px;
    height: calc(100vh - 300px);
    max-height: 800px;
  }

  /* ==========================================================================
     Outer shell (the chart itself)
     ========================================================================== */

  .cortex-gantt {
    position: relative;
    display: flex;
    flex-direction: column;
    width: 100%;
    height: 100%;
    min-height: 300px;
    background: var(--rd-bg-raised);
    border: 1px solid var(--rd-border);
    border-radius: var(--rd-radius-lg);
    overflow: hidden;
    font-family: var(--rd-font-sans);
    color: var(--rd-fg);
  }

  .cortex-gantt__main {
    display: grid;
    grid-template-columns: 260px 1fr;
    flex: 1;
    min-height: 0;
    overflow: hidden;
  }

  /* ==========================================================================
     Sidebar
     ========================================================================== */

  .cortex-gantt__sidebar {
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--rd-border);
    overflow: hidden;
    background: var(--rd-bg-raised);
    z-index: 25;
  }

  .cortex-gantt__sidebar-header {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    padding: 0 14px;
    font-family: var(--rd-font-sans);
    font-size: var(--rd-text-2xs);
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--rd-fg-subtle);
    background: var(--rd-bg-sunken);
    border-bottom: 1px solid var(--rd-border);
  }

  .cortex-gantt__sidebar-body {
    flex: 1;
    overflow: hidden;
    position: relative;
  }

  .cortex-gantt__sidebar-body-inner {
    position: relative;
  }

  .cortex-gantt__sidebar-row {
    position: absolute;
    left: 0;
    right: 0;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0 10px 0 14px;
    font-size: var(--rd-text-sm);
    color: var(--rd-fg);
    border-bottom: 1px solid var(--rd-border);
    cursor: default;
    overflow: hidden;
  }

  .cortex-gantt__sidebar-row:hover {
    background: var(--rd-bg-hover);
  }

  /* Type indicator dot */
  .cortex-gantt__sidebar-row-dot {
    flex-shrink: 0;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--rd-fg-faint);
  }

  .cortex-gantt__sidebar-row-dot--card      { background: var(--rd-success); }
  .cortex-gantt__sidebar-row-dot--step      { background: var(--rd-warn); }
  .cortex-gantt__sidebar-row-dot--todo      { background: var(--rd-info); }
  .cortex-gantt__sidebar-row-dot--milestone { background: var(--rd-accent); }

  .cortex-gantt__sidebar-row-label {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--rd-fg);
  }

  .cortex-gantt__sidebar-row--unscheduled {
    opacity: 0.65;
  }

  .cortex-gantt__sidebar-row--unscheduled .cortex-gantt__sidebar-row-label {
    font-style: italic;
  }

  /* Tooltip floating over the clipped sidebar */
  .cortex-gantt__sidebar-tooltip {
    position: fixed;
    z-index: 100;
    max-width: 300px;
    padding: 6px 10px;
    font-size: var(--rd-text-xs);
    font-weight: 500;
    line-height: 1.4;
    white-space: normal;
    word-break: break-word;
    color: var(--rd-fg);
    background: var(--rd-bg-raised);
    border: 1px solid var(--rd-border);
    border-radius: var(--rd-radius-md);
    box-shadow: var(--rd-shadow-pop);
    pointer-events: none;
    opacity: 0;
    transition: opacity var(--rd-dur-fast) var(--rd-ease);
  }

  .cortex-gantt__sidebar-tooltip--visible {
    opacity: 1;
  }

  /* ==========================================================================
     Timeline wrapper
     ========================================================================== */

  .cortex-gantt__timeline-wrapper {
    display: flex;
    flex-direction: column;
    min-width: 0;
    overflow: hidden;
  }

  /* ==========================================================================
     Column header (month/week/day bands)
     ========================================================================== */

  .cortex-gantt__header {
    position: sticky;
    top: 0;
    z-index: 20;
    flex-shrink: 0;
    background: var(--rd-bg-sunken);
    border-bottom: 1px solid var(--rd-border);
    overflow-x: auto;
    overflow-y: hidden;
    scrollbar-width: none;
  }

  .cortex-gantt__header::-webkit-scrollbar {
    display: none;
  }

  .cortex-gantt__header-upper,
  .cortex-gantt__header-middle,
  .cortex-gantt__header-lower {
    position: relative;
    display: flex;
    height: 28px;
  }

  .cortex-gantt__header-upper {
    background: var(--rd-bg-sunken);
    border-bottom: 1px solid var(--rd-border);
  }

  .cortex-gantt__header-middle {
    background: var(--rd-bg-sunken);
    border-bottom: 1px solid var(--rd-border);
  }

  .cortex-gantt__header-lower {
    background: var(--rd-bg-sunken);
  }

  .cortex-gantt__header-cell {
    position: absolute;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    height: 100%;
    padding: 0 10px;
    font-family: var(--rd-font-mono);
    font-size: var(--rd-text-xs);
    font-weight: 500;
    letter-spacing: 0;
    color: var(--rd-fg-muted);
    border-right: 1px solid var(--rd-border);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .cortex-gantt__header-upper .cortex-gantt__header-cell {
    font-family: var(--rd-font-sans);
    font-size: var(--rd-text-2xs);
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--rd-fg-subtle);
  }

  .cortex-gantt__header-cell-sub {
    margin-left: 6px;
    font-size: var(--rd-text-2xs);
    font-weight: 400;
    color: var(--rd-fg-subtle);
  }

  .cortex-gantt__header-cell--today {
    color: var(--rd-accent);
    background: var(--rd-accent-soft);
  }

  .cortex-gantt__header-cell--weekend {
    background: var(--rd-bg);
  }

  /* ==========================================================================
     Body (scrollable area)
     ========================================================================== */

  .cortex-gantt__body {
    position: relative;
    flex: 1;
    overflow: auto;
    scroll-behavior: smooth;
  }

  /* ==========================================================================
     Background grid
     ========================================================================== */

  .cortex-gantt__grid {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    pointer-events: none;
  }

  .cortex-gantt__grid-cell {
    position: absolute;
    top: 0;
    height: 100%;
    border-right: 1px solid var(--rd-border);
  }

  .cortex-gantt__grid-cell--weekend {
    background: var(--rd-bg-sunken);
  }

  .cortex-gantt__grid-cell--today {
    background: var(--rd-accent-soft);
  }

  /* ==========================================================================
     Rows (task-bar container)
     ========================================================================== */

  .cortex-gantt__rows {
    position: relative;
    min-height: 100%;
  }

  .cortex-gantt__row {
    position: absolute;
    left: 0;
    width: 100%;
    border-bottom: 1px solid var(--rd-border);
  }

  .cortex-gantt__row:hover {
    background: var(--rd-bg-hover);
  }

  /* ==========================================================================
     Task bars
     ========================================================================== */

  .cortex-gantt__bar {
    position: absolute;
    display: flex;
    align-items: center;
    background: var(--rd-info);
    border: 0;
    border-radius: var(--rd-radius-md);
    cursor: grab;
    user-select: none;
    transition:
      transform var(--rd-dur-fast) var(--rd-ease),
      filter var(--rd-dur-fast) var(--rd-ease);
    z-index: 2;
    overflow: visible;
  }

  .cortex-gantt__bar:hover {
    filter: brightness(1.05);
  }

  .cortex-gantt__bar:focus {
    outline: 2px solid var(--rd-accent);
    outline-offset: 2px;
    z-index: 10;
  }

  .cortex-gantt__bar--selected {
    outline: 2px solid var(--rd-accent);
    outline-offset: 2px;
    z-index: 10;
  }

  .cortex-gantt__bar--conflict {
    outline: 2px solid var(--rd-danger);
    outline-offset: 2px;
  }

  .cortex-gantt__bar--dragging {
    cursor: grabbing;
    opacity: 0.92;
    z-index: 100;
    box-shadow: var(--rd-shadow-pop);
  }

  .cortex-gantt__bar--resizing {
    cursor: ew-resize;
  }

  /* Content hidden: labels shown in sidebar column. */
  .cortex-gantt__bar-content {
    display: none;
  }

  /* Progress overlay (lighter tint on top of the bar). */
  .cortex-gantt__bar-progress {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.25);
    pointer-events: none;
    z-index: 0;
    border-radius: inherit;
  }

  /* Resize handles */
  .cortex-gantt__bar-handle {
    position: absolute;
    top: 0;
    width: 8px;
    height: 100%;
    cursor: ew-resize;
    z-index: 5;
  }

  .cortex-gantt__bar-handle--left  { left: -4px; }
  .cortex-gantt__bar-handle--right { right: -4px; }

  .cortex-gantt__bar-handle:hover {
    background: rgba(0, 0, 0, 0.1);
  }

  /* Bar color variants — keyed to redesign semantic palette. */
  .cortex-gantt__bar--todo,
  .cortex-gantt__bar--wham      { background: var(--rd-info); }

  .cortex-gantt__bar--card,
  .cortex-gantt__bar--boom      { background: var(--rd-success); }

  .cortex-gantt__bar--step,
  .cortex-gantt__bar--whoosh    { background: var(--rd-warn); }

  .cortex-gantt__bar--milestone {
    background: var(--rd-accent);
    opacity: 0.9;
  }
  .cortex-gantt__bar--milestone:hover { opacity: 1; }

  /* Rollup bars (project milestones) compute their position from contained
     cards/steps and cannot be dragged directly — the next render would
     overwrite any persisted due_on. Template milestones carry their own
     editable schedule and stay draggable, so gate this on the rollup flag
     rather than the milestone type. See drag_manager.js#isUndraggableTask. */
  .cortex-gantt__bar--rollup { cursor: not-allowed; }

  .cortex-gantt__bar--pow       { background: var(--rd-danger); }
  .cortex-gantt__bar--kapow     { background: var(--rd-accent); }
  .cortex-gantt__bar--zap       { background: var(--rd-warn); }

  .cortex-gantt__bar--muted     {
    background: var(--rd-fg-faint);
    opacity: 0.75;
  }
  .cortex-gantt__bar--milestone.cortex-gantt__bar--muted {
    background: var(--rd-fg-faint);
  }

  .cortex-gantt__bar--unscheduled {
    opacity: 0.55;
  }

  .cortex-gantt--readonly .cortex-gantt__bar {
    cursor: default;
  }
  .cortex-gantt--readonly .cortex-gantt__bar:hover {
    filter: none;
  }
  .cortex-gantt--readonly .cortex-gantt__bar-handle {
    display: none;
  }

  /* ==========================================================================
     Today indicator
     ========================================================================== */

  .cortex-gantt__today {
    position: absolute;
    top: 0;
    width: 2px;
    background: var(--rd-accent);
    z-index: 15;
    pointer-events: none;
  }

  .cortex-gantt__today::before {
    content: 'TODAY';
    position: sticky;
    top: 4px;
    display: block;
    width: max-content;
    padding: 1px 6px;
    margin-left: 50%;
    transform: translateX(-50%);
    font-family: var(--rd-font-mono);
    font-size: 9.5px;
    font-weight: 600;
    letter-spacing: 0.04em;
    color: var(--rd-accent-fg);
    background: var(--rd-accent);
    border-radius: 3px;
    white-space: nowrap;
  }

  /* ==========================================================================
     Dependency arrows
     ========================================================================== */

  .cortex-gantt__arrows {
    position: absolute;
    top: 0;
    left: 0;
    pointer-events: none;
    overflow: visible;
    z-index: 1;
  }

  .cortex-gantt__dep-group {
    pointer-events: auto;
  }

  .cortex-gantt__dep-hitarea {
    stroke: transparent;
    stroke-width: 12px;
    fill: none;
  }

  .cortex-gantt__dep-line {
    stroke: var(--rd-fg-subtle);
    stroke-width: 1.5px;
    fill: none;
    transition:
      stroke var(--rd-dur-fast) var(--rd-ease),
      stroke-width var(--rd-dur-fast) var(--rd-ease);
  }

  .cortex-gantt__dep-group:hover .cortex-gantt__dep-line {
    stroke: var(--rd-accent);
    stroke-width: 2px;
  }

  /* Dependency type variants — line style keeps the semantic, colors stay
     neutral so hover (accent) reads consistently. */
  .cortex-gantt__dep-line--fs { stroke-dasharray: none; }
  .cortex-gantt__dep-line--ss { stroke-dasharray: 6 4; }
  .cortex-gantt__dep-line--ff { stroke-dasharray: 2 4; }
  .cortex-gantt__dep-line--sf { stroke-dasharray: 8 4 2 4; }

  .cortex-gantt__dep-group--fs:hover .cortex-gantt__dep-line { stroke: var(--rd-accent); }
  .cortex-gantt__dep-group--ss:hover .cortex-gantt__dep-line { stroke: var(--rd-info); }
  .cortex-gantt__dep-group--ff:hover .cortex-gantt__dep-line { stroke: var(--rd-success); }
  .cortex-gantt__dep-group--sf:hover .cortex-gantt__dep-line { stroke: var(--rd-warn); }

  .cortex-gantt__dep-delete {
    position: absolute;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    margin-left: -9px;
    margin-top: -9px;
    font-size: var(--rd-text-base);
    font-weight: 600;
    line-height: 1;
    color: var(--rd-accent-fg);
    background: var(--rd-danger);
    border: 1px solid var(--rd-border-strong);
    border-radius: 50%;
    cursor: pointer;
    z-index: 100;
    box-shadow: var(--rd-shadow-sm);
    transition: transform var(--rd-dur-fast) var(--rd-ease);
  }

  .cortex-gantt__dep-delete:hover { transform: scale(1.15); }
  .cortex-gantt__dep-delete:active { transform: scale(0.95); }

  /* ==========================================================================
     Dependency connectors (drag-to-connect)
     ========================================================================== */

  .cortex-gantt__bar-connector {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 10px;
    height: 10px;
    background: var(--rd-bg-raised);
    border: 2px solid var(--rd-border-strong);
    border-radius: 50%;
    cursor: crosshair;
    opacity: 0;
    pointer-events: none;
    transition:
      opacity var(--rd-dur-fast) var(--rd-ease),
      transform var(--rd-dur-fast) var(--rd-ease),
      background var(--rd-dur-fast) var(--rd-ease),
      border-color var(--rd-dur-fast) var(--rd-ease);
    z-index: 5;
  }

  .cortex-gantt__bar-connector--start { left: -7px; }
  .cortex-gantt__bar-connector--end   { right: -7px; }

  .cortex-gantt__bar:hover .cortex-gantt__bar-connector {
    opacity: 1;
    pointer-events: auto;
  }

  .cortex-gantt__bar-connector--has-connection {
    opacity: 1;
    pointer-events: auto;
    border-color: var(--rd-fg-muted);
  }

  .cortex-gantt__bar-connector:hover {
    transform: translateY(-50%) scale(1.3);
    background: var(--rd-accent);
    border-color: var(--rd-accent);
  }

  .cortex-gantt__rows--connecting .cortex-gantt__bar-connector {
    opacity: 1;
    pointer-events: auto;
    border-color: var(--rd-fg-subtle);
  }

  .cortex-gantt__bar-connector--drop-target {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(-50%) scale(1.5);
    background: var(--rd-success);
    border-color: var(--rd-success);
    box-shadow: 0 0 0 4px var(--rd-success-soft);
  }

  .cortex-gantt__temp-line {
    stroke: var(--rd-accent);
    stroke-width: 2px;
    stroke-dasharray: 6 3;
    pointer-events: none;
  }

  body.cortex-gantt--connecting,
  body.cortex-gantt--connecting * {
    cursor: crosshair !important;
  }

  /* ==========================================================================
     Empty state (page-level)
     ========================================================================== */

  .gantt-empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 56px 20px;
    text-align: center;
    background: var(--rd-bg-raised);
    border: 1px solid var(--rd-border);
    border-radius: var(--rd-radius-lg);
    color: var(--rd-fg-muted);
  }

  .gantt-empty-icon {
    margin-bottom: 10px;
    color: var(--rd-fg-subtle);
  }

  .gantt-empty-state h2 {
    font-family: var(--rd-font-sans);
    font-size: var(--rd-text-lg);
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--rd-fg);
    margin: 0 0 4px;
  }

  .gantt-empty-state p {
    margin: 0 0 6px;
    font-size: var(--rd-text-sm);
  }

  /* ==========================================================================
     Conflicts panel
     ========================================================================== */

  .gantt-conflicts-panel {
    padding: 14px 16px;
    background: var(--rd-danger-soft);
    border: 1px solid var(--rd-danger);
    border-radius: var(--rd-radius-lg);
  }

  .gantt-conflicts-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 6px;
    color: var(--rd-danger);
  }

  .gantt-conflicts-header h3 {
    font-family: var(--rd-font-sans);
    font-size: var(--rd-text-md);
    font-weight: 600;
    letter-spacing: -0.005em;
    margin: 0;
  }

  .gantt-conflicts-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 20px;
    height: 20px;
    padding: 0 7px;
    font-family: var(--rd-font-mono);
    font-size: var(--rd-text-xs);
    font-weight: 600;
    background: var(--rd-danger);
    color: var(--rd-accent-fg);
    border-radius: var(--rd-radius-full);
  }

  .gantt-conflicts-description {
    margin: 0 0 10px;
    color: var(--rd-fg-muted);
    font-size: var(--rd-text-sm);
  }

  .gantt-conflicts-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
  }

  .conflict-item {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    padding: 10px 12px;
    background: var(--rd-bg-raised);
    border: 1px solid var(--rd-border);
    border-radius: var(--rd-radius-md);
  }

  .conflict-icon {
    flex-shrink: 0;
    color: var(--rd-danger);
  }

  .conflict-title {
    font-weight: 500;
    color: var(--rd-fg);
  }

  .conflict-description {
    font-size: var(--rd-text-sm);
    color: var(--rd-fg-muted);
  }

  /* ==========================================================================
     Legend
     ========================================================================== */

  .gantt-legend {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px 18px;
    padding: 10px 14px;
    background: var(--rd-bg-raised);
    border: 1px solid var(--rd-border);
    border-radius: var(--rd-radius-lg);
  }

  .gantt-legend h3 {
    font-family: var(--rd-font-sans);
    font-size: var(--rd-text-2xs);
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--rd-fg-subtle);
    margin: 0 10px 0 0;
  }

  .gantt-legend-items {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px 14px;
  }

  .gantt-legend-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: var(--rd-text-xs);
    color: var(--rd-fg-muted);
  }

  .gantt-legend-color {
    width: 10px;
    height: 10px;
    border-radius: 2px;
    border: 0;
    flex: 0 0 auto;
  }

  /* Shared legend swatch tints (project_templates view uses class variants). */
  .gantt-legend-color--card      { background: var(--rd-success); }
  .gantt-legend-color--step      { background: var(--rd-warn); }
  .gantt-legend-color--todo      { background: var(--rd-info); }
  .gantt-legend-color--milestone { background: var(--rd-accent); }
  .gantt-legend-color--done      { background: var(--rd-fg-faint); }
  .gantt-legend-color--overdue   { background: var(--rd-danger); }

  /* ==========================================================================
     Popup / tooltip
     ========================================================================== */

  .gantt-popup {
    background: var(--rd-bg-raised);
    border: 1px solid var(--rd-border);
    border-radius: var(--rd-radius-lg);
    box-shadow: var(--rd-shadow-pop);
    min-width: 280px;
    max-width: 400px;
    font-family: var(--rd-font-sans);
    font-size: var(--rd-text-sm);
    color: var(--rd-fg);
    overflow: hidden;
  }

  .gantt-popup-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    background: var(--rd-bg-sunken);
    border-bottom: 1px solid var(--rd-border);
  }

  .gantt-popup-header strong {
    flex: 1;
    font-family: var(--rd-font-sans);
    font-size: var(--rd-text-base);
    font-weight: 600;
    letter-spacing: -0.005em;
    color: var(--rd-fg);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .gantt-popup-type {
    flex-shrink: 0;
  }

  .gantt-popup-body {
    padding: 12px 14px;
  }

  .gantt-popup-body > div {
    margin-bottom: 8px;
  }

  .gantt-popup-body > div:last-child {
    margin-bottom: 0;
  }

  .gantt-popup-conflict {
    margin-top: 10px;
    padding: 8px 10px;
    background: var(--rd-danger-soft);
    border: 1px solid var(--rd-danger);
    border-radius: var(--rd-radius-md);
  }

  .gantt-popup-conflict strong {
    color: var(--rd-danger);
  }

  /* Informational note for milestones — explains the derived-schedule
     model so the not-allowed cursor on the bar isn't a surprise. */
  .gantt-popup-note {
    margin-top: 10px;
    padding: 8px 10px;
    background: var(--rd-accent-soft);
    border: 1px solid var(--rd-border);
    border-radius: var(--rd-radius-md);
    color: var(--rd-fg-muted);
    font-size: var(--rd-text-xs);
    line-height: var(--rd-leading-snug);
  }

  .gantt-popup-actions {
    display: flex;
    gap: 6px;
    padding: 10px 14px;
    border-top: 1px solid var(--rd-border);
  }

  .gantt-date-old {
    color: var(--rd-fg-subtle);
    text-decoration: line-through;
    margin-right: 6px;
  }

  .gantt-date-new {
    color: var(--rd-success);
    font-weight: 600;
  }
}