.diagram { display: grid; gap: 20px; }
    .diagram header { display: grid; gap: 10px; }
    .diagram h1 { max-width: 940px; }
    .diagram [data-diagram-role="lead"] { max-width: 880px; }
    .flow, .lane-flow {
      display: flex;
      align-items: stretch;
      gap: 8px;
    }
    .flow-card, .branch, .state, .layer-body, .layer-result,
    .lane-card, .source-card, .hub-card, .target-card {
      min-width: 0;
      border: 1px solid var(--diagram-line);
      border-radius: 8px;
      background: var(--diagram-panel);
    }
    .flow-card, .state, .lane-card, .source-card, .hub-card, .target-card {
      display: grid;
      align-content: start;
      gap: 7px;
      padding: 14px;
    }
    .flow-card, .state { flex: 1 1 0; }
    .flow-card h2, .state h2, .branch h2, .lane-card h2,
    .source-card h2, .hub-card h2, .target-card h2 {
      margin: 0;
      font-size: 14px !important;
      line-height: 1.35;
    }
    .flow-card p, .state p, .branch p, .lane-card p,
    .source-card p, .hub-card p, .target-card p,
    .layer-body p, .layer-result p {
      margin: 0;
      color: var(--diagram-muted);
      font-size: 11px;
      line-height: 1.5;
    }
    .kicker {
      color: var(--track-strong, var(--track));
      font-size: 10px;
      font-weight: 900;
      letter-spacing: .04em;
      text-transform: uppercase;
    }
    .arrow {
      display: grid;
      place-items: center;
      flex: 0 0 22px;
      color: var(--track-strong, var(--track));
      font-size: 18px;
      font-weight: 900;
    }
    .decision-shell {
      display: grid;
      gap: 18px;
      padding: 16px;
      border: 1px solid var(--diagram-line);
      border-radius: 8px;
      background: var(--diagram-paper);
    }
    .question {
      justify-self: center;
      max-width: 680px;
      padding: 11px 18px;
      border: 1px solid color-mix(in srgb, var(--track) 45%, var(--diagram-line));
      border-radius: 999px;
      background: var(--diagram-accent-bg);
      color: var(--diagram-text);
      font-size: 14px;
      font-weight: 850;
      text-align: center;
    }
    .branches {
      position: relative;
      display: grid;
      grid-template-columns: repeat(var(--branch-count), minmax(0, 1fr));
      gap: 12px;
    }
    .branches::before {
      content: "";
      position: absolute;
      top: -18px;
      left: calc(50% / var(--branch-count));
      right: calc(50% / var(--branch-count));
      height: 18px;
      border-top: 1px solid var(--diagram-line);
      border-left: 1px solid var(--diagram-line);
      border-right: 1px solid var(--diagram-line);
    }
    .branch {
      display: grid;
      align-content: start;
      gap: 7px;
      padding: 14px;
      border-top: 3px solid color-mix(in srgb, var(--track) 58%, transparent);
    }
    .lifecycle {
      display: grid;
      gap: 12px;
      padding: 16px;
      border: 1px solid var(--diagram-line);
      border-radius: 8px;
      background: var(--diagram-paper);
    }
    .state-row { display: flex; align-items: stretch; gap: 8px; }
    .return-line {
      display: grid;
      grid-template-columns: 1fr auto 1fr;
      align-items: center;
      gap: 10px;
      color: var(--track-strong, var(--track));
      font-size: 11px;
      font-weight: 850;
      text-align: center;
    }
    .return-line::before, .return-line::after {
      content: "";
      height: 1px;
      background: var(--diagram-line);
    }
    .boundary {
      display: grid;
      overflow: hidden;
      border: 1px solid var(--diagram-line);
      border-radius: 8px;
      background: var(--diagram-paper);
    }
    .layer {
      display: grid;
      grid-template-columns: 126px minmax(0, 1fr) minmax(170px, .55fr);
      align-items: stretch;
      border-top: 1px solid var(--diagram-line);
    }
    .layer:first-child { border-top: 0; }
    .layer-name {
      display: grid;
      place-items: center;
      padding: 13px;
      background: var(--diagram-panel-strong);
      color: var(--diagram-text);
      font-size: 12px;
      font-weight: 850;
      text-align: center;
    }
    .layer-body, .layer-result { display: grid; align-content: center; gap: 4px; padding: 13px; }
    .layer-body strong, .layer-result strong { color: var(--diagram-text); font-size: 12px; }
    .layer-result { border-left: 1px solid var(--diagram-line); background: var(--diagram-panel); }
    .two-lanes { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
    .lane {
      display: grid;
      gap: 10px;
      padding: 15px;
      border: 1px solid var(--diagram-line);
      border-radius: 8px;
      background: var(--diagram-paper);
    }
    .lane-title { color: var(--track-strong, var(--track)); font-size: 13px; font-weight: 900; }
    .lane-flow { align-items: center; }
    .lane-card { flex: 1 1 0; }
    .network {
      display: grid;
      grid-template-columns: minmax(150px, .8fr) 28px minmax(190px, 1fr) 28px minmax(260px, 1.4fr);
      align-items: center;
      gap: 10px;
    }
    .source-card, .hub-card { text-align: center; }
    .hub-card {
      border-color: color-mix(in srgb, var(--track) 45%, var(--diagram-line));
      background: var(--diagram-accent-bg);
    }
    .target-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
    .core {
      padding: 13px 15px;
      border: 1px solid var(--diagram-line);
      border-radius: 8px;
      background: var(--diagram-accent-bg);
      color: var(--diagram-muted);
      font-size: 12px;
      line-height: 1.55;
    }
    .core strong { color: var(--diagram-text); }
    code {
      width: fit-content;
      padding: 2px 6px;
      border: 1px solid var(--diagram-line);
      border-radius: 5px;
      background: var(--diagram-paper);
      color: var(--diagram-text);
      font-size: 11px;
      font-weight: 750;
    }
    @media (max-width: 720px) {
      .diagram { gap: 16px; }
      .flow, .state-row, .lane-flow { flex-direction: column; }
      .arrow { min-height: 22px; transform: rotate(90deg); }
      .branches { grid-template-columns: 1fr; }
      .branches::before { display: none; }
      .question { border-radius: 8px; }
      .return-line { grid-template-columns: 1fr; }
      .return-line::before, .return-line::after { display: none; }
      .layer { grid-template-columns: 1fr; }
      .layer-result { border-top: 1px solid var(--diagram-line); border-left: 0; }
      .two-lanes { grid-template-columns: 1fr; }
      .network { grid-template-columns: 1fr; }
      .target-grid { grid-template-columns: 1fr; }
    }