:root {
    --bg: #0f1117;
    --panel: #171a23;
    --panel2: #1e2230;
    --border: #2a2f3f;
    --text: #e7e9f0;
    --text-dim: #8b90a3;
    --done: #22c55e;
    --done-bg: #16301f;
    --available: #3b82f6;
    --available-bg: #16233f;
    --available-glow: rgba(59,130,246,0.35);
    --blocked: #5b5f6e;
    --blocked-bg: #191b22;
    --accent: #f59e0b;
    --danger: #ef4444;
    --radius: 12px;
  }
  * { box-sizing: border-box; }
  body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    padding: 20px;
    max-width: 1000px;
    margin: 0 auto;
  }
  h1 {
    font-size: 1.4rem;
    margin: 4px 0 4px 0;
  }
  .subtitle {
    color: var(--text-dim);
    font-size: 0.85rem;
    margin-bottom: 20px;
  }
  .card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    margin-bottom: 18px;
  }
  .card h2 {
    font-size: 0.95rem;
    margin: 0 0 12px 0;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.05em;
  }
  input[type="text"] {
    width: 100%;
    padding: 10px 12px;
    background: var(--panel2);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: 0.95rem;
    margin-bottom: 10px;
  }
  input[type="text"]:focus { outline: 2px solid var(--available); }
  .picker-head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 10px;
    margin-top: 4px;
  }
  .deps-chosen {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 8px 0;
  }
  .deps-chosen:empty { display: none; }
  .dep-filter { margin-bottom: 8px !important; }
  .deps-picker {
    display: flex;
    flex-wrap: wrap;
    align-content: flex-start;
    gap: 8px;
    margin-bottom: 12px;
    max-height: 168px;
    overflow-y: auto;
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--bg);
  }
  .deps-picker::-webkit-scrollbar { width: 10px; }
  .deps-picker::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 999px;
  }
  .picker-group {
    flex: 1 1 100%;
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--text-dim);
    opacity: 0.6;
    margin: 4px 0 -2px 2px;
  }
  .picker-group:first-child { margin-top: 0; }
  .dep-chip .chip-mark {
    font-size: 0.72rem;
    margin-right: 5px;
    opacity: 0.65;
  }
  .dep-chip.is-done { color: var(--done); border-color: rgba(34,197,94,0.3); }
  .dep-chip.is-done .chip-mark { color: var(--done); opacity: 1; }
  .picker-empty {
    color: var(--text-dim);
    font-size: 0.82rem;
    padding: 4px 2px;
  }
  .dep-chip {
    padding: 6px 12px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: var(--panel2);
    color: var(--text-dim);
    font-size: 0.82rem;
    cursor: pointer;
    user-select: none;
    transition: all 0.15s;
  }
  .dep-chip.selected {
    background: var(--available-bg);
    border-color: var(--available);
    color: var(--available);
    font-weight: 600;
  }
  .dep-chip:hover { border-color: var(--available); }
  .row { display: flex; gap: 8px; }
  button {
    background: var(--available);
    color: white;
    border: none;
    padding: 10px 18px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.15s;
  }
  button:hover { opacity: 0.85; }
  button.secondary {
    background: var(--panel2);
    color: var(--text-dim);
    border: 1px solid var(--border);
  }
  button.danger { background: var(--danger); }
  #empty-msg {
    color: var(--text-dim);
    font-size: 0.85rem;
    font-style: italic;
    padding: 12px 0;
  }

  /* Diagram */
  #diagram-wrap {
    overflow-x: auto;
    padding: 10px 0;
  }
  #diagram-inner {
    position: relative;
    display: flex;
    gap: 60px;
    min-height: 80px;
    padding: 10px;
    width: max-content;
    min-width: 100%;
  }
  .diagram-col {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 24px;
    justify-content: center;
    min-width: 150px;
    padding-top: 26px;
  }
  .page-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 14px;
  }
  .settings-btn {
    font-size: 1.25rem;
    line-height: 1;
    padding: 7px 9px;
    border-radius: 10px;
    flex-shrink: 0;
    border: 1px solid transparent;
  }
  .settings-btn:hover { color: var(--text); border-color: var(--border); }
  .settings-btn[aria-expanded="true"] {
    background: var(--panel2);
    border-color: var(--accent);
  }
  .settings-panel .setting {
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 7px 0;
    font-size: 0.86rem;
    cursor: pointer;
    user-select: none;
  }
  .settings-panel .setting:hover { color: var(--available); }
  .settings-panel .setting input { accent-color: var(--accent); cursor: pointer; margin: 0; }
  .setting-group {
    padding: 12px 0 2px 0;
    border-top: 1px solid var(--border);
    margin-top: 10px;
  }
  .setting-label {
    display: block;
    font-size: 0.78rem;
    color: var(--text-dim);
    margin-bottom: 9px;
  }
  .swatches { display: flex; gap: 9px; flex-wrap: wrap; }
  .swatch {
    width: 26px; height: 26px;
    border-radius: 50%;
    border: 2px solid transparent;
    cursor: pointer;
    padding: 0;
    transition: transform 0.15s;
  }
  .swatch:hover { transform: scale(1.15); }
  .swatch.selected {
    border-color: var(--text);
    box-shadow: 0 0 0 2px var(--bg), 0 0 10px currentColor;
  }
  .seg { display: flex; gap: 6px; flex-wrap: wrap; }
  .seg button {
    width: auto;
    margin: 0;
    padding: 6px 13px;
    font-size: 0.78rem;
    background: var(--panel2);
    color: var(--text-dim);
    border: 1px solid var(--border);
  }
  .seg button.selected {
    background: var(--available-bg);
    border-color: var(--available);
    color: var(--available);
  }
  .head-right {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
  }
  /* Le barré des tâches terminées devient optionnel. */
  body.no-strike .item-row.done .item-name,
  body.no-strike .node.done { text-decoration: none; }
  .search-row {
    display: flex;
    gap: 8px;
    align-items: center;
    margin-bottom: 12px;
  }
  .search-row input { margin: 0; }
  .list-count {
    font-size: 0.78rem;
    color: var(--text-dim);
  }
  .tier-badge {
    flex-shrink: 0;
    font-size: 0.68rem;
    color: var(--text-dim);
    background: var(--panel2);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 2px 8px;
    margin-right: 8px;
  }
  mark {
    background: var(--accent);
    color: #10131a;
    border-radius: 3px;
    padding: 0 2px;
  }
  /* Densité compacte */
  body.dense .item-row { padding: 7px 10px; }
  body.dense .card { padding: 12px; margin-bottom: 12px; }
  body.dense .node { padding: 6px 10px; font-size: 0.74rem; max-width: 185px; }
  body.dense .diagram-col { gap: 14px; }
  body.dense #diagram-inner { gap: 44px; }
  /* Noeud correspondant a la recherche */
  .node.hit {
    border-color: var(--accent) !important;
    box-shadow: 0 0 0 2px var(--accent), 0 0 14px rgba(245,158,11,0.45) !important;
  }
  .card-head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
  }
  .card-head h2 { margin-bottom: 0; }
  .focus-switch {
    display: flex;
    align-items: center;
    gap: 7px;
    font-size: 0.8rem;
    color: var(--text-dim);
    cursor: pointer;
    user-select: none;
  }
  .focus-switch:hover { color: var(--text); }
  .focus-switch input { accent-color: var(--accent); cursor: pointer; margin: 0; }
  #focus-hint {
    font-size: 0.75rem;
    color: var(--accent);
    opacity: 0.8;
    margin: 8px 0 0 0;
  }
  .col-head {
    position: absolute;
    top: 0; left: 0; right: 0;
    text-align: center;
    font-size: 0.68rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-dim);
    opacity: 0.65;
    pointer-events: none;
  }
  .node {
    position: relative;
    padding: 9px 13px;
    border-radius: 10px;
    font-size: 0.8rem;
    line-height: 1.3;
    text-align: left;
    max-width: 215px;
    border: 2px solid var(--border);
    background: var(--panel2);
    color: var(--text);
    z-index: 2;
    cursor: pointer;
    transition: opacity 0.15s, box-shadow 0.15s, transform 0.15s;
  }
  /* Case a cocher dans le noeud, quand l'option diagramCheck est active. */
  .node.checkable {
    display: flex;
    align-items: flex-start;
    gap: 8px;
  }
  .node-checkbox {
    width: 15px; height: 15px;
    margin: 1px 0 0;
    accent-color: var(--done);
    cursor: pointer;
    flex-shrink: 0;
  }
  .node-checkbox:disabled { cursor: not-allowed; opacity: 0.45; }
  .node-name { min-width: 0; }
  /* Survol : on isole la tâche et ses voisins directs. */
  #diagram-inner.focus .node { opacity: 0.13; }
  #diagram-inner.focus .node.rel { opacity: 1; }
  #diagram-inner.focus .node.rel-main {
    transform: scale(1.04);
    box-shadow: 0 0 0 2px var(--accent), 0 4px 18px rgba(0,0,0,0.5);
  }
  #diagram-inner.focus svg path { opacity: 0.05 !important; }
  #diagram-inner.focus svg path.rel { opacity: 1 !important; stroke-width: 3; }
  .node.done {
    background: var(--done-bg);
    border-color: var(--done);
    color: var(--done);
    text-decoration: line-through;
    opacity: 0.75;
  }
  .node.available {
    background: var(--available-bg);
    border-color: var(--available);
    color: var(--available);
    font-weight: 700;
    box-shadow: 0 0 14px var(--available-glow);
  }
  .node.blocked {
    background: var(--blocked-bg);
    border-color: var(--border);
    color: var(--blocked);
    opacity: 0.55;
  }
  #arrows {
    position: absolute;
    top: 0; left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
  }
  .legend {
    display: flex;
    gap: 18px;
    flex-wrap: wrap;
    font-size: 0.78rem;
    color: var(--text-dim);
    margin-top: 14px;
    padding-top: 12px;
    border-top: 1px solid var(--border);
  }
  .legend span { display: flex; align-items: center; gap: 6px; }
  .dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }

  /* List */
  .item-row {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px;
    border-radius: 8px;
    background: var(--panel2);
    margin-bottom: 8px;
    border: 1px solid var(--border);
  }
  .item-row.done { opacity: 0.6; }
  /* Surbrillance brève quand on saute vers une tâche. */
  @keyframes flash-row {
    0%, 55% {
      background: var(--available-bg);
      border-color: var(--available);
      box-shadow: 0 0 0 3px var(--available-glow);
    }
    100% {
      background: var(--panel2);
      border-color: var(--border);
      box-shadow: none;
    }
  }
  .item-row.flash { animation: flash-row 1.8s ease-out; }
  .item-checkbox {
    width: 20px; height: 20px;
    accent-color: var(--done);
    cursor: pointer;
    flex-shrink: 0;
  }
  .item-name {
    flex: 1;
    font-size: 0.92rem;
  }
  .item-row.done .item-name { text-decoration: line-through; color: var(--text-dim); }
  /* Dépendances d'une ligne : une puce par dépendance, repliées au-delà de 3. */
  .deps-cell {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: flex-end;
    gap: 4px;
    max-width: 47%;
    flex-shrink: 0;
  }
  .dep-pill {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    max-width: 150px;
    font-size: 0.72rem;
    line-height: 1.5;
    color: var(--text-dim);
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 2px 9px 2px 7px;
  }
  .dep-pill { cursor: pointer; }
  .dep-pill:hover {
    border-color: var(--available);
    color: var(--available);
  }
  .dep-pill.ok:hover { border-color: var(--done); color: var(--done); }
  .dep-pill .dep-txt {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .dep-pill .mark {
    flex-shrink: 0;
    font-size: 0.78rem;
    line-height: 1;
  }
  .dep-pill.ok {
    color: var(--done);
    background: var(--done-bg);
    border-color: rgba(34, 197, 94, 0.4);
  }
  .dep-pill.ok .mark { color: var(--done); font-weight: 700; }
  .dep-pill .mark.wait { opacity: 0.55; }
  .dep-count {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    color: var(--text-dim);
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 2px 7px;
  }
  .dep-count.ok { color: var(--done); border-color: rgba(34, 197, 94, 0.4); }
  button.dep-more {
    margin: 0;
    padding: 2px 9px;
    font-size: 0.7rem;
    font-weight: 600;
    border-radius: 999px;
    background: var(--panel2);
    border: 1px dashed var(--border);
    color: var(--text-dim);
  }
  button.dep-more:hover {
    opacity: 1;
    color: var(--text);
    border-color: var(--available);
  }
  body.dense .dep-pill { max-width: 125px; font-size: 0.68rem; }
  /* Sur petit écran la ligne passe sur deux niveaux plutôt que de s'écraser. */
  @media (max-width: 640px) {
    .item-row { flex-wrap: wrap; }
    .item-name { flex: 1 1 100%; }
    .deps-cell { max-width: 100%; justify-content: flex-start; }
  }
  .icon-btn {
    background: none;
    border: none;
    color: var(--text-dim);
    cursor: pointer;
    padding: 4px 8px;
    font-size: 1rem;
  }
  .icon-btn:hover { color: var(--danger); }
  .cycle-warning {
    color: var(--accent);
    font-size: 0.8rem;
    margin-top: 10px;
  }
  #loading { color: var(--text-dim); font-size: 0.85rem; }