:root {
      --bg: #0b0c0e;
      --surface: #181b1f;
      --surface-soft: #22252b;
      --surface-accent: #1f2d3a;
      --text: #d8d9da;
      --muted: #9fa1a6;
      --line: #2c3235;
      --accent: #e6522c;
      --accent-strong: #f47232;
      --accent-soft: rgba(230, 82, 44, 0.16);
      --blue: #5794f2;
      --amber: #fade2a;
      --ok-bg: rgba(115, 191, 105, 0.16);
      --ok-text: #73bf69;
      --warn-bg: rgba(250, 222, 42, 0.16);
      --warn-text: #fade2a;
      --danger-bg: rgba(242, 73, 92, 0.16);
      --danger-text: #f2495c;
      --shadow: 0 8px 24px rgba(0, 0, 0, 0.55);
    }

    * {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      font-family: "Inter", "Helvetica Neue", Arial, sans-serif;
      color: var(--text);
      background:
        radial-gradient(circle at top right, rgba(230, 82, 44, 0.08), transparent 35%),
        radial-gradient(circle at bottom left, rgba(87, 148, 242, 0.06), transparent 40%),
        linear-gradient(180deg, #111217 0%, var(--bg) 100%);
    }

    main {
      width: min(1120px, calc(100% - 24px));
      margin: 28px auto 44px;
      display: grid;
      gap: 20px;
    }

    .hero,
    .card {
      background: var(--surface);
      border: 1px solid var(--line);
      border-radius: 22px;
      box-shadow: var(--shadow);
    }

    .hero {
      padding: 28px;
      display: grid;
      gap: 18px;
    }

    .card {
      padding: 22px;
    }

    .eyebrow {
      display: inline-block;
      padding: 6px 10px;
      border-radius: 999px;
      background: var(--surface-soft);
      color: var(--muted);
      font-size: 12px;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }

    h1,
    h2,
    h3,
    h4 {
      margin: 0;
      font-family: Georgia, "Times New Roman", serif;
      letter-spacing: -0.03em;
    }

    h1 {
      font-size: clamp(2rem, 4.8vw, 3.3rem);
      line-height: 1.02;
    }

    p,
    .section-copy,
    .field-note,
    .preview,
    .subtle,
    .response-copy,
    .metric-subtle,
    .table-note,
    .chart-help {
      color: var(--muted);
      line-height: 1.6;
    }

    .hero p {
      max-width: 70ch;
      margin: 0;
    }

    .architecture {
      display: grid;
      grid-template-columns: repeat(5, minmax(0, 1fr));
      gap: 12px;
    }

    .arch-step {
      padding: 14px;
      border-radius: 16px;
      background: var(--surface-soft);
      border: 1px solid var(--line);
      position: relative;
    }

    .arch-step strong {
      display: block;
      margin-bottom: 5px;
    }

    .arch-step::after {
      content: "→";
      position: absolute;
      right: -10px;
      top: 50%;
      transform: translateY(-50%);
      color: var(--muted);
      font-size: 1.1rem;
    }

    .arch-step:last-child::after {
      display: none;
    }

    .layout {
      display: grid;
      grid-template-columns: minmax(0, 1.2fr) minmax(300px, 0.8fr);
      gap: 20px;
    }

    .stack {
      display: grid;
      gap: 20px;
    }

    .section-head {
      display: grid;
      gap: 8px;
      margin-bottom: 18px;
    }

    .scenario-grid,
    .link-row,
    .metric-grid,
    .chart-grid,
    .copy-grid,
    .sim-grid,
    .info-grid {
      display: grid;
      gap: 12px;
    }

    .scenario-grid {
      grid-template-columns: repeat(3, minmax(0, 1fr));
      margin-bottom: 18px;
    }

    .info-grid {
      grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .scenario,
    .metric-card,
    .chart-card,
    .mini-card,
    .history-card,
    .sim-card,
    .disclosure {
      padding: 14px;
      border-radius: 16px;
      border: 1px solid var(--line);
      background: var(--surface-soft);
    }

    .scenario {
      cursor: pointer;
      text-align: left;
      font: inherit;
    }

    .scenario.active {
      border-color: var(--accent);
      background: var(--surface-accent);
      box-shadow: inset 0 0 0 1px var(--accent-soft);
    }

    .scenario strong,
    .metric-card strong,
    .mini-card strong,
    .history-card strong,
    .sim-card strong {
      display: block;
      margin-bottom: 4px;
    }

    .scenario small {
      color: var(--muted);
      display: block;
      margin-top: 6px;
      line-height: 1.5;
    }

    .beginner-steps {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: 8px;
      margin-bottom: 16px;
    }

    .beginner-steps div {
      display: flex;
      align-items: center;
      gap: 8px;
      min-height: 38px;
      padding: 8px 10px;
      border: 1px solid var(--line);
      border-radius: 14px;
      background: var(--surface-soft);
      color: var(--muted);
      font-size: 0.86rem;
      font-weight: 700;
      line-height: 1.25;
    }

    .beginner-steps span {
      display: inline-grid;
      place-items: center;
      flex: none;
      width: 22px;
      height: 22px;
      border-radius: 999px;
      background: var(--accent);
      color: #fff;
      font-size: 0.78rem;
    }

    .beginner-explainer {
      display: grid;
      gap: 14px;
      margin: 14px 0;
      padding: 16px;
      border: 1px solid var(--line);
      border-radius: 16px;
      background:
        linear-gradient(180deg, rgba(87, 148, 242, 0.1), transparent 70%),
        var(--surface-soft);
    }

    .beginner-explainer strong {
      display: block;
      margin-bottom: 6px;
    }

    .beginner-explainer p {
      margin: 0;
      color: var(--muted);
      line-height: 1.55;
    }

    .beginner-live-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 10px;
    }

    .beginner-live-card {
      display: grid;
      gap: 4px;
      padding: 12px;
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: 14px;
      background: rgba(255, 255, 255, 0.06);
    }

    .beginner-live-card span {
      color: var(--muted);
      font-size: 0.74rem;
      font-weight: 800;
      letter-spacing: 0.05em;
      text-transform: uppercase;
    }

    .beginner-live-card strong {
      margin: 0;
      color: var(--text);
      font-size: 0.92rem;
      line-height: 1.35;
    }

    .limit-visual {
      display: grid;
      gap: 8px;
    }

    .bucket-visual,
    .token-visual,
    .timeline-visual,
    .queue-visual,
    .leaky-visual,
    .fixed-window-visual,
    .sliding-log-visual {
      display: flex;
      flex-wrap: wrap;
      gap: 7px;
      align-items: center;
      min-height: 28px;
    }

    .bucket-token,
    .queue-slot,
    .limit-dot {
      width: 18px;
      height: 18px;
      border: 1px solid rgba(255, 255, 255, 0.18);
      background: rgba(255, 255, 255, 0.08);
    }

    .bucket-token,
    .limit-dot {
      border-radius: 999px;
    }

    .queue-slot {
      border-radius: 5px;
    }

    .bucket-token.spent,
    .queue-slot.active,
    .limit-dot.active {
      background: var(--accent);
      border-color: var(--accent-strong);
      box-shadow: 0 0 0 4px var(--accent-soft);
    }

    .leaky-visual {
      padding: 10px;
      border-radius: 14px;
      background: rgba(255, 255, 255, 0.06);
    }

    .token-visual,
    .fixed-window-visual,
    .sliding-log-visual,
    .counter-visual {
      padding: 10px;
      border-radius: 14px;
      background: rgba(255, 255, 255, 0.06);
    }

    .window-frame {
      display: grid;
      gap: 7px;
      padding: 8px;
      border: 1px dashed rgba(255, 255, 255, 0.22);
      border-radius: 12px;
    }

    .window-frame-label {
      color: var(--muted);
      font-size: 0.78rem;
      font-weight: 800;
      letter-spacing: 0.04em;
      text-transform: uppercase;
    }

    .counter-visual {
      display: grid;
      gap: 10px;
    }

    .counter-bar {
      display: grid;
      gap: 5px;
    }

    .counter-bar span {
      color: var(--muted);
      font-size: 0.82rem;
      font-weight: 700;
    }

    .counter-track {
      height: 12px;
      overflow: hidden;
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.14);
    }

    .counter-track i {
      display: block;
      height: 100%;
      border-radius: inherit;
      background: var(--accent);
    }

    .flow-label {
      color: var(--muted);
      font-size: 0.86rem;
      font-weight: 700;
      white-space: nowrap;
    }

    .flow-arrow {
      color: var(--accent);
      font-weight: 800;
    }

    .visual-caption,
    .visual-empty {
      color: var(--muted);
      font-size: 0.9rem;
      line-height: 1.45;
    }

    .disclosure {
      padding: 0;
      overflow: hidden;
    }

    .disclosure summary {
      list-style: none;
      cursor: pointer;
      padding: 16px 18px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 14px;
      font-weight: 700;
    }

    .disclosure summary::-webkit-details-marker {
      display: none;
    }

    .disclosure summary span {
      color: var(--muted);
      font-weight: 400;
      font-size: 0.95rem;
    }

    .disclosure summary::after {
      content: "+";
      color: var(--accent);
      font-size: 1.2rem;
      line-height: 1;
      flex: none;
    }

    .disclosure[open] summary::after {
      content: "-";
    }

    .disclosure-body {
      padding: 0 18px 18px;
      border-top: 1px solid var(--line);
    }

    form {
      display: grid;
      gap: 18px;
    }

    .grid,
    .builder-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 14px;
    }

    .field {
      display: grid;
      gap: 7px;
    }

    .field label {
      font-weight: 700;
    }

    input,
    select,
    button,
    textarea {
      font: inherit;
    }

    input,
    select,
    textarea {
      width: 100%;
      border: 1px solid var(--line);
      border-radius: 14px;
      padding: 13px 14px;
      background: #0f1114;
      color: var(--text);
    }

    input:focus,
    select:focus,
    textarea:focus {
      outline: none;
      border-color: var(--accent);
      box-shadow: 0 0 0 3px var(--accent-soft);
    }

    code,
    pre,
    .history-table,
    .history-table th,
    .history-table td {
      font-family: "SFMono-Regular", Menlo, Monaco, monospace;
    }

    .field-note code,
    .item code,
    .copy-box code,
    .link-chip code,
    .metric-card code,
    .preview code,
    .response-copy code {
      padding: 0.12em 0.35em;
      border-radius: 6px;
      background: rgba(255, 255, 255, 0.06);
      color: var(--amber);
    }

    .builder-card {
      padding: 16px;
      border-radius: 18px;
      background: var(--surface-accent);
      border: 1px solid rgba(87, 148, 242, 0.24);
      display: grid;
      gap: 14px;
    }

    .builder-note {
      font-size: 0.94rem;
    }

    .validation {
      display: none;
      padding: 14px;
      border-radius: 16px;
      background: var(--danger-bg);
      border: 1px solid rgba(242, 73, 92, 0.35);
      color: var(--danger-text);
    }

    .validation.visible {
      display: block;
    }

    .validation ul {
      margin: 8px 0 0 18px;
      padding: 0;
    }

    .actions {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 14px;
      flex-wrap: wrap;
    }

    .primary,
    .secondary {
      border: 0;
      border-radius: 14px;
      padding: 12px 16px;
      cursor: pointer;
      font-weight: 700;
    }

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

    .primary:hover {
      background: var(--accent-strong);
    }

    .secondary {
      background: var(--surface-soft);
      color: var(--text);
      border: 1px solid var(--line);
    }

    .secondary:hover {
      background: #2c3137;
    }

    .status {
      min-height: 24px;
      color: var(--muted);
      font-size: 0.95rem;
    }

    .list {
      display: grid;
      gap: 12px;
      margin-top: 16px;
    }

    .item {
      padding: 14px;
      border-radius: 14px;
      background: var(--surface-soft);
      border: 1px solid var(--line);
    }

    .item strong {
      display: block;
      margin-bottom: 4px;
    }

    .badge {
      display: inline-flex;
      align-items: center;
      padding: 9px 12px;
      border-radius: 999px;
      background: var(--surface-soft);
      color: var(--text);
      font-weight: 700;
    }

    .badge.allowed {
      background: var(--ok-bg);
      color: var(--ok-text);
    }

    .badge.denied {
      background: var(--warn-bg);
      color: var(--warn-text);
    }

    pre,
    .copy-box {
      margin: 0;
      padding: 16px;
      border-radius: 16px;
      background: #0d0f12;
      color: #c8c9cc;
      border: 1px solid var(--line);
      overflow: auto;
      line-height: 1.55;
      font-size: 0.94rem;
      white-space: pre-wrap;
      word-break: break-word;
    }

    .copy-grid {
      grid-template-columns: repeat(2, minmax(0, 1fr));
      margin-top: 16px;
    }

    .copy-actions {
      display: flex;
      gap: 10px;
      flex-wrap: wrap;
      margin-top: 10px;
    }

    .response-summary {
      margin-top: 14px;
      padding: 14px;
      border-radius: 16px;
      background: var(--surface-soft);
      border: 1px solid var(--line);
    }

    .response-detail,
    .redis-key {
      margin-top: 14px;
    }

    .summary-card {
      background:
        radial-gradient(circle at top right, rgba(230, 82, 44, 0.14), transparent 36%),
        linear-gradient(180deg, #1a1d22 0%, #15171b 100%);
      border-color: rgba(230, 82, 44, 0.22);
    }

    .summary-shell {
      display: grid;
      gap: 14px;
      padding: 16px;
      border-radius: 18px;
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(230, 82, 44, 0.18);
    }

    .summary-kicker,
    .sim-kicker {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 10px;
      border-radius: 999px;
      width: fit-content;
      font-size: 0.8rem;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }

    .summary-kicker {
      background: var(--accent-soft);
      color: var(--accent-strong);
    }

    .summary-preview {
      padding: 16px;
      border-radius: 16px;
      background: rgba(255, 255, 255, 0.02);
      border: 1px solid var(--line);
      box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
    }

    .summary-preview .preview {
      color: var(--text);
    }

    .summary-meta {
      display: grid;
      gap: 10px;
    }

    .history-table {
      width: 100%;
      border-collapse: collapse;
      margin-top: 16px;
      font-size: 0.88rem;
    }

    .history-table th,
    .history-table td {
      border-bottom: 1px solid var(--line);
      padding: 10px 8px;
      text-align: left;
      vertical-align: top;
    }

    .history-table th {
      color: var(--muted);
      font-weight: 700;
    }

    .history-empty {
      margin-top: 12px;
      color: var(--muted);
    }

    .link-row {
      grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    }

    .link-chip {
      display: block;
      text-decoration: none;
      color: var(--text);
      border: 1px solid var(--line);
      border-radius: 16px;
      padding: 14px;
      background: var(--surface-soft);
    }

    .link-chip strong {
      display: block;
      margin-bottom: 4px;
    }

    .metric-grid {
      grid-template-columns: repeat(4, minmax(0, 1fr));
      margin-top: 16px;
    }

    .metric-value {
      display: block;
      margin-top: 8px;
      font-size: 1.55rem;
      font-weight: 700;
      letter-spacing: -0.03em;
    }

    .metric-subtle {
      display: block;
      margin-top: 4px;
      font-size: 0.9rem;
    }

    .chart-grid {
      grid-template-columns: repeat(2, minmax(0, 1fr));
      margin-top: 16px;
    }

    .chart-card.wide {
      grid-column: span 2;
    }

    .chart-top {
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
      gap: 12px;
      flex-wrap: wrap;
    }

    .chart-card h3 {
      font-size: 1.05rem;
      margin-bottom: 2px;
    }

    .chart-legend {
      display: flex;
      gap: 12px;
      flex-wrap: wrap;
      color: var(--muted);
      font-size: 0.88rem;
    }

    .legend-item {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .legend-dot {
      width: 10px;
      height: 10px;
      border-radius: 999px;
      display: inline-block;
    }

    .legend-dot.accent {
      background: var(--accent);
    }

    .legend-dot.blue {
      background: var(--blue);
    }

    .legend-dot.amber {
      background: var(--amber);
    }

    .chart-frame {
      position: relative;
      width: 100%;
      height: 290px;
      border-radius: 12px;
      background: #111217;
      border: 1px solid var(--line);
      overflow: hidden;
      margin-top: 12px;
    }

    .chart-frame svg {
      display: block;
      width: 100%;
      height: 100%;
    }

    .chart-frame.history-chart {
      height: 260px;
    }

    .chart-frame.large-chart {
      height: 340px;
    }

    .chart-empty {
      display: grid;
      place-items: center;
      width: 100%;
      height: 100%;
      color: var(--muted);
      font-size: 0.92rem;
      padding: 16px;
      text-align: center;
    }

    .chart-meta {
      margin-top: 8px;
      font-size: 0.9rem;
      color: var(--muted);
    }

    .chart-stats {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 10px;
      margin-top: 10px;
    }

    .chart-stat {
      padding: 10px 12px;
      border-radius: 12px;
      background: var(--surface-soft);
      border: 1px solid var(--line);
    }

    .chart-stat strong {
      display: block;
      font-size: 0.78rem;
      color: var(--muted);
      text-transform: uppercase;
      letter-spacing: 0.06em;
      margin-bottom: 4px;
    }

    .chart-help {
      margin-top: 8px;
      font-size: 0.9rem;
    }

    .chart-tooltip {
      position: absolute;
      display: none;
      min-width: 160px;
      max-width: min(240px, calc(100% - 16px));
      padding: 10px 12px;
      border-radius: 12px;
      background: rgba(10, 11, 13, 0.96);
      color: #e8e9eb;
      border: 1px solid var(--line);
      box-shadow: 0 12px 24px rgba(0, 0, 0, 0.6);
      pointer-events: none;
      z-index: 2;
      font-size: 0.86rem;
      line-height: 1.45;
    }

    .chart-tooltip.visible {
      display: block;
    }

    .chart-tooltip strong {
      display: block;
      margin-bottom: 6px;
    }

    .tooltip-row {
      display: flex;
      justify-content: space-between;
      gap: 12px;
      align-items: center;
    }

    .tooltip-label {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .tooltip-dot {
      width: 8px;
      height: 8px;
      border-radius: 999px;
      display: inline-block;
      flex: none;
    }

    .sim-grid {
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      margin-top: 8px;
    }

    .simulator-card {
      background:
        linear-gradient(180deg, #14161a 0%, #1c1f25 100%);
      border-color: var(--line);
      color: #e8e9eb;
    }

    .simulator-card .section-copy,
    .simulator-card .subtle,
    .simulator-card .timeline-note {
      color: rgba(232, 233, 235, 0.72);
    }

    .simulator-shell {
      display: grid;
      gap: 14px;
    }

    .sim-kicker {
      background: rgba(255, 255, 255, 0.12);
      color: #dfeaed;
    }

    .sim-card {
      display: grid;
      gap: 6px;
      background: rgba(255, 255, 255, 0.08);
      border-color: rgba(255, 255, 255, 0.12);
      color: #f5f8fa;
    }

    .sim-card .subtle {
      font-size: 0.92rem;
    }

    .sim-card code {
      background: rgba(255, 255, 255, 0.12);
      color: #fff;
    }

    .timeline-note {
      margin-top: 8px;
      color: var(--muted);
      font-size: 0.9rem;
    }

    .muted-pill {
      display: inline-block;
      margin-top: 10px;
      padding: 6px 10px;
      border-radius: 999px;
      background: var(--surface-soft);
      color: var(--muted);
      font-size: 0.84rem;
    }

    @media (max-width: 980px) {
      .architecture,
      .metric-grid,
      .chart-grid,
      .link-row,
      .copy-grid,
      .scenario-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }
    }

    @media (max-width: 860px) {
      .layout,
      .grid,
      .builder-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 720px) {
      main {
        width: min(100% - 16px, 1120px);
        margin-top: 16px;
      }

      .hero,
      .card {
        padding: 18px;
      }

      .architecture,
      .metric-grid,
      .chart-grid,
      .link-row,
      .copy-grid,
      .scenario-grid,
      .sim-grid,
      .info-grid {
        grid-template-columns: 1fr;
      }

      .chart-card.wide {
        grid-column: auto;
      }

      .chart-stats {
        grid-template-columns: 1fr;
      }

      .arch-step::after {
        display: none;
      }
    }

    /* ── Service Health ── */
    .health-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 14px;
    }
    .health-item {
      display: flex;
      align-items: center;
      gap: 7px;
      padding: 8px 14px;
      border: 1px solid var(--line);
      border-radius: 10px;
      background: var(--surface-soft);
      font-size: 13px;
    }
    .health-dot {
      width: 9px;
      height: 9px;
      border-radius: 50%;
      flex-shrink: 0;
    }
    .health-dot.up   { background: #73bf69; box-shadow: 0 0 0 3px rgba(115,191,105,.22); }
    .health-dot.down { background: #f2495c; box-shadow: 0 0 0 3px rgba(242,73,92,.22); }
    .health-dot.unknown { background: var(--muted); }
    .health-label { font-weight: 600; color: var(--text); }
    .health-extra { color: var(--muted); font-size: 11px; }
    .health-error { color: var(--muted); font-size: 13px; padding: 6px 0; }

    /* ── WebSocket status badge ── */
    .ws-badge {
      display: inline-block;
      padding: 3px 9px;
      border-radius: 999px;
      font-size: 11px;
      font-weight: 600;
      letter-spacing: .03em;
    }
    .ws-badge.connecting  { background: var(--surface-soft); color: var(--muted); }
    .ws-badge.connected   { background: var(--ok-bg);       color: var(--ok-text); }
    .ws-badge.disconnected{ background: var(--danger-bg);   color: var(--danger-text); }

    /* ── Event table ── */
    .event-controls {
      display: flex;
      align-items: center;
      gap: 10px;
      margin: 14px 0 8px;
      flex-wrap: wrap;
    }
    .event-table-wrap {
      overflow-x: auto;
      border: 1px solid var(--line);
      border-radius: 12px;
      max-height: 320px;
      overflow-y: auto;
    }
    .event-table {
      width: 100%;
      border-collapse: collapse;
      font-size: 12.5px;
    }
    .event-table thead th {
      position: sticky;
      top: 0;
      background: var(--surface-soft);
      padding: 8px 12px;
      text-align: left;
      font-weight: 600;
      font-size: 11px;
      text-transform: uppercase;
      letter-spacing: .06em;
      color: var(--muted);
      border-bottom: 1px solid var(--line);
      white-space: nowrap;
    }
    .event-table tbody tr {
      border-bottom: 1px solid var(--line);
      transition: background .1s;
    }
    .event-table tbody tr:last-child { border-bottom: none; }
    .event-table tbody tr:hover { background: var(--surface-soft); }
    .event-table td {
      padding: 6px 12px;
      white-space: nowrap;
      color: var(--text);
    }
    .event-empty {
      text-align: center;
      color: var(--muted);
      padding: 28px;
      font-size: 13px;
    }
    .event-counter {
      font-size: 12px;
      color: var(--muted);
      margin-left: auto;
    }

    /* ── Pills ── */
    .pill {
      display: inline-block;
      padding: 2px 8px;
      border-radius: 999px;
      font-size: 11px;
      font-weight: 600;
      letter-spacing: .03em;
    }
    .pill-tb      { background: rgba(87, 148, 242, 0.16); color: var(--blue); }
    .pill-sw      { background: var(--surface-soft); color: var(--muted); }
    .pill-allowed { background: var(--ok-bg);     color: var(--ok-text); }
    .pill-denied  { background: var(--danger-bg); color: var(--danger-text); }

    /* ── Alerts ── */
    .alerts-list { display: grid; gap: 8px; margin-top: 14px; }
    .alert-item {
      padding: 11px 14px;
      border-radius: 10px;
      border-left: 4px solid var(--line);
      background: var(--surface-soft);
    }
    .alert-item.sev-critical { border-color: var(--danger-text); background: var(--danger-bg); }
    .alert-item.sev-warning  { border-color: var(--amber); background: var(--warn-bg); }
    .alert-item.sev-info     { border-color: var(--blue);  background: rgba(87, 148, 242, 0.14); }
    .alert-header {
      display: flex;
      align-items: center;
      gap: 8px;
      margin-bottom: 4px;
    }
    .alert-name  { font-weight: 700; font-size: 13px; }
    .alert-sev   { font-size: 10px; font-weight: 700; padding: 2px 7px; border-radius: 999px; text-transform: uppercase; letter-spacing: .06em; }
    .sev-critical .alert-sev { background: var(--danger-text); color: #0b0c0e; }
    .sev-warning  .alert-sev { background: var(--amber);       color: #0b0c0e; }
    .sev-info     .alert-sev { background: var(--blue);        color: #0b0c0e; }
    .alert-summary { font-size: 12px; color: var(--text); }
    .alert-since   { font-size: 11px; color: var(--muted); margin-top: 3px; }
    .alerts-empty  { color: var(--muted); font-size: 13px; padding: 12px 0; }

    /* ── Logs ── */
    .logs-wrap {
      margin-top: 14px;
      border: 1px solid var(--line);
      border-radius: 12px;
      max-height: 280px;
      overflow-y: auto;
      background: #1a1f26;
      font-family: "SF Mono", "Fira Code", "Consolas", monospace;
      font-size: 11.5px;
    }
    .log-line {
      display: flex;
      align-items: baseline;
      gap: 8px;
      padding: 4px 12px;
      border-bottom: 1px solid rgba(255,255,255,.05);
    }
    .log-line:last-child { border-bottom: none; }
    .log-time   { color: #5a7a9a; flex-shrink: 0; }
    .log-level  {
      flex-shrink: 0;
      width: 38px;
      font-weight: 700;
      font-size: 10px;
      text-align: center;
    }
    .log-level-info  { color: #4ec9b0; }
    .log-level-warn  { color: #ddb74e; }
    .log-level-error { color: #f44747; }
    .log-msg    { color: #d4d4d4; flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
    .log-detail { color: #6a9955; flex-shrink: 0; font-size: 10.5px; }
    .logs-empty { color: var(--muted); font-size: 13px; padding: 12px 0; }
    .log-filter-row {
      display: flex;
      align-items: center;
      gap: 8px;
      margin-top: 14px;
      flex-wrap: wrap;
    }
    .log-filter-row select {
      padding: 5px 10px;
      border: 1px solid var(--line);
      border-radius: 8px;
      background: var(--surface);
      font-size: 12px;
      color: var(--text);
    }

    /* ── Chaos Engineering ── */
    .chaos-controls {
      display: flex;
      gap: 10px;
      flex-wrap: wrap;
      margin: 14px 0;
    }
    .chaos-btn {
      padding: 9px 18px;
      border-radius: 10px;
      border: 1px solid var(--line);
      background: var(--surface-soft);
      font-size: 13px;
      font-weight: 600;
      cursor: pointer;
      transition: background .15s, opacity .15s;
    }
    .chaos-btn:hover:not(:disabled) { filter: brightness(.96); }
    .chaos-btn:disabled { opacity: .5; cursor: not-allowed; }
    .chaos-btn.danger  { background: var(--danger-bg);  color: var(--danger-text); border-color: rgba(166,43,43,.25); }
    .chaos-btn.warn    { background: var(--warn-bg);    color: var(--warn-text);   border-color: rgba(166,98,20,.25); }
    .chaos-btn.restore { background: var(--ok-bg);      color: var(--ok-text);     border-color: rgba(22,98,69,.25); }
    .chaos-result {
      font-size: 12px;
      color: var(--muted);
      margin-bottom: 8px;
      min-height: 18px;
    }
    .chaos-table {
      width: 100%;
      border-collapse: collapse;
      font-size: 12.5px;
    }
    .chaos-table th {
      background: var(--surface-soft);
      padding: 7px 12px;
      text-align: left;
      font-size: 11px;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: .06em;
      color: var(--muted);
      border-bottom: 1px solid var(--line);
    }
    .chaos-table td {
      padding: 6px 12px;
      border-bottom: 1px solid var(--line);
      font-size: 12px;
    }
    .chaos-table tbody tr:last-child td { border-bottom: none; }
    .chaos-table-wrap {
      border: 1px solid var(--line);
      border-radius: 12px;
      overflow: hidden;
      max-height: 260px;
      overflow-y: auto;
    }
    .chaos-unavail { color: var(--muted); font-size: 13px; padding: 8px 0; }

    /* ── Two-column observability layout ── */
    .obs-two-col {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }
    @media (max-width: 768px) {
      .obs-two-col { grid-template-columns: 1fr; }
    }

    /* ── Grafana/Prometheus-inspired refresh ── */
    :root {
      --bg: #0b0f14;
      --surface: #11161d;
      --surface-soft: #161d26;
      --surface-raised: #1b2430;
      --surface-accent: #1a2028;
      --text: #e8edf2;
      --muted: #9aa7b6;
      --line: #273240;
      --line-strong: #314051;
      --accent: #ff9830;
      --accent-strong: #ffb357;
      --accent-soft: rgba(255, 152, 48, 0.16);
      --blue: #73a8ff;
      --amber: #ffcc4d;
      --shadow: 0 22px 48px rgba(3, 7, 12, 0.42);
    }

    html {
      color-scheme: dark;
    }

    body {
      font-family: "IBM Plex Sans", "Avenir Next", "Segoe UI", sans-serif;
      color: var(--text);
      background-color: var(--bg);
      background-image:
        radial-gradient(circle at top right, rgba(255, 152, 48, 0.12), transparent 24%),
        radial-gradient(circle at left 20%, rgba(115, 168, 255, 0.09), transparent 22%),
        linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px),
        linear-gradient(180deg, #091017 0%, #0b0f14 100%);
      background-size: auto, auto, 32px 32px, 32px 32px, auto;
      background-attachment: fixed;
    }

    h1,
    h2,
    h3,
    h4 {
      font-family: "IBM Plex Sans", "Avenir Next", "Segoe UI", sans-serif;
      letter-spacing: -0.025em;
    }

    code,
    pre,
    .history-table,
    .history-table th,
    .history-table td,
    .event-table,
    .event-table th,
    .event-table td,
    .chaos-table,
    .chaos-table th,
    .chaos-table td {
      font-family: "IBM Plex Mono", "SFMono-Regular", Menlo, Monaco, monospace;
    }

    a {
      color: inherit;
    }

    .app-shell {
      width: min(1380px, calc(100% - 28px));
      margin: 20px auto 40px;
      gap: 16px;
    }

    .app-shell > * {
      animation: shell-reveal 360ms ease both;
    }

    .app-shell > *:nth-child(2) {
      animation-delay: 50ms;
    }

    .app-shell > *:nth-child(3) {
      animation-delay: 90ms;
    }

    .app-shell > *:nth-child(4) {
      animation-delay: 130ms;
    }

    .topbar,
    .hero,
    .card {
      position: relative;
      overflow: hidden;
      border: 1px solid var(--line);
      border-radius: 12px;
      background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.03), transparent 18%),
        linear-gradient(180deg, rgba(16, 22, 29, 0.98) 0%, rgba(13, 18, 24, 0.98) 100%);
      box-shadow: var(--shadow);
    }

    .topbar::before,
    .hero::before,
    .card::before {
      content: "";
      position: absolute;
      inset: 0 0 auto 0;
      height: 2px;
      background: linear-gradient(90deg, rgba(255, 152, 48, 0), rgba(255, 152, 48, 0.8), rgba(115, 168, 255, 0.55), rgba(255, 152, 48, 0));
      opacity: 0.85;
    }

    .topbar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 14px 18px;
      min-height: 72px;
    }

    .topbar-brand,
    .section-title-row {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-wrap: wrap;
    }

    .brand-mark {
      display: grid;
      grid-template-columns: repeat(3, 8px);
      gap: 5px;
      padding: 8px;
      border-radius: 10px;
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.06);
    }

    .brand-mark span {
      width: 8px;
      border-radius: 999px;
      background: linear-gradient(180deg, var(--accent-strong), rgba(255, 152, 48, 0.28));
      box-shadow: 0 0 16px rgba(255, 152, 48, 0.28);
    }

    .brand-mark span:nth-child(1) {
      height: 18px;
    }

    .brand-mark span:nth-child(2) {
      height: 24px;
      background: linear-gradient(180deg, #ffcc4d, rgba(255, 204, 77, 0.22));
    }

    .brand-mark span:nth-child(3) {
      height: 14px;
      background: linear-gradient(180deg, #73a8ff, rgba(115, 168, 255, 0.24));
      box-shadow: 0 0 16px rgba(115, 168, 255, 0.24);
    }

    .topbar-title {
      margin-top: 3px;
      font-size: 1.05rem;
      font-weight: 700;
      letter-spacing: 0.01em;
    }

    .topbar-meta,
    .hero-links {
      display: flex;
      align-items: center;
      gap: 8px;
      flex-wrap: wrap;
    }

    .topbar-chip,
    .hero-link-chip {
      display: inline-flex;
      align-items: center;
      min-height: 28px;
      padding: 5px 10px;
      border-radius: 999px;
      border: 1px solid rgba(255, 255, 255, 0.08);
      background: rgba(255, 255, 255, 0.035);
      color: var(--muted);
      font-size: 0.78rem;
      font-weight: 600;
      letter-spacing: 0.04em;
      text-transform: uppercase;
    }

    .topbar-chip-hot {
      border-color: rgba(255, 152, 48, 0.34);
      background: rgba(255, 152, 48, 0.12);
      color: var(--accent-strong);
    }

    .hero {
      padding: 20px;
      gap: 12px;
      background:
        linear-gradient(90deg, rgba(255, 152, 48, 0.08), transparent 24%),
        linear-gradient(180deg, rgba(255, 255, 255, 0.03), transparent 22%),
        linear-gradient(180deg, rgba(14, 20, 26, 0.99) 0%, rgba(11, 16, 22, 0.99) 100%);
    }

    .hero-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.95fr);
      gap: 18px;
      align-items: start;
    }

    .hero-copy {
      display: grid;
      gap: 10px;
      max-width: 78ch;
    }

    .hero-grid-compact {
      grid-template-columns: minmax(0, 1.3fr) minmax(320px, 1fr);
      gap: 14px;
      align-items: end;
    }

    .hero-kicker,
    .eyebrow {
      display: inline-flex;
      align-items: center;
      width: fit-content;
      min-height: 26px;
      padding: 4px 10px;
      border-radius: 999px;
      border: 1px solid rgba(255, 152, 48, 0.22);
      background: rgba(255, 152, 48, 0.1);
      color: var(--accent-strong);
      font-size: 0.75rem;
      font-weight: 700;
      letter-spacing: 0.09em;
      text-transform: uppercase;
    }

    .hero h1 {
      max-width: 16ch;
      font-size: clamp(1.85rem, 3.3vw, 2.65rem);
      line-height: 1.06;
      font-weight: 700;
    }

    .hero p {
      max-width: 72ch;
      margin: 0;
      color: #c7d3df;
      font-size: 1rem;
      line-height: 1.72;
    }

    .hero-link {
      color: var(--accent-strong);
      text-decoration: none;
      border-bottom: 1px solid rgba(255, 152, 48, 0.38);
    }

    .hero-link:hover {
      color: #ffd49f;
      border-bottom-color: rgba(255, 212, 159, 0.52);
    }

    .hero-inline-stats {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 10px;
    }

    .hero-inline-stat {
      display: grid;
      gap: 4px;
      min-height: 68px;
      padding: 10px 12px;
      border-radius: 9px;
      border: 1px solid var(--line);
      background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.03), transparent 24%),
        rgba(18, 25, 33, 0.94);
    }

    .hero-inline-stat strong {
      font-size: 0.9rem;
      font-weight: 700;
      line-height: 1.4;
    }

    .hero-stat-label {
      color: var(--blue);
      font-size: 0.74rem;
      font-weight: 700;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }

    .hero-dropdown {
      border: 1px solid rgba(255, 255, 255, 0.06);
      border-radius: 10px;
      background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.025), transparent 24%),
        rgba(17, 24, 31, 0.92);
      overflow: hidden;
    }

    .hero-dropdown summary {
      list-style: none;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      min-height: 46px;
      padding: 0 14px;
      color: #dbe5ee;
      font-size: 0.82rem;
      font-weight: 700;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }

    .hero-dropdown summary::-webkit-details-marker {
      display: none;
    }

    .hero-dropdown summary::after {
      content: "+";
      color: var(--accent-strong);
      font-size: 1rem;
      line-height: 1;
      flex: none;
    }

    .hero-dropdown[open] summary::after {
      content: "-";
    }

    .hero-dropdown-body {
      display: grid;
      gap: 10px;
      padding: 0 14px 14px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
    }

    .hero-dropdown-body p {
      margin: 0;
      max-width: 72ch;
    }

    .architecture-wide {
      grid-template-columns: repeat(7, minmax(0, 1fr));
      gap: 8px;
    }

    .arch-step {
      min-height: 100px;
      padding: 10px 10px 12px;
      border-radius: 9px;
      border: 1px solid var(--line);
      background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.03), transparent 24%),
        rgba(19, 26, 34, 0.96);
      color: #d6e0ea;
    }

    .arch-step strong {
      margin-bottom: 8px;
      color: #f2f5f8;
      font-size: 0.78rem;
      font-weight: 700;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }

    .arch-step::after {
      display: none;
    }

    .layout {
      grid-template-columns: minmax(0, 1.25fr) minmax(320px, 0.85fr);
      gap: 16px;
    }

    .stack,
    .info-grid,
    .scenario-grid,
    .metric-grid,
    .chart-grid,
    .copy-grid,
    .sim-grid,
    .link-row {
      gap: 12px;
    }

    .card {
      padding: 16px;
    }

    .section-head {
      gap: 5px;
      margin-bottom: 12px;
      padding-bottom: 8px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    }

    .section-head h2,
    .section-head h3 {
      font-size: 1.02rem;
      font-weight: 700;
      letter-spacing: 0.01em;
    }

    .section-copy,
    .field-note,
    .preview,
    .subtle,
    .response-copy,
    .metric-subtle,
    .table-note,
    .chart-help,
    .chart-meta {
      color: var(--muted);
      font-size: 0.92rem;
      line-height: 1.65;
    }

    .disclosure,
    .scenario,
    .metric-card,
    .chart-card,
    .mini-card,
    .history-card,
    .sim-card,
    .item,
    .summary-shell,
    .response-summary,
    .summary-preview,
    .link-chip,
    .health-item,
    .chart-stat {
      border-radius: 10px;
      border-color: var(--line);
      background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.03), transparent 24%),
        rgba(20, 27, 35, 0.94);
    }

    .disclosure summary {
      min-height: 42px;
      padding: 12px 14px;
      font-size: 0.9rem;
    }

    .disclosure summary span {
      font-size: 0.88rem;
    }

    .list,
    .summary-meta {
      gap: 10px;
    }

    .scenario {
      min-height: 124px;
      display: grid;
      align-content: start;
      gap: 4px;
      transition: border-color 140ms ease, transform 140ms ease, background 140ms ease;
    }

    .scenario:hover,
    .link-chip:hover {
      border-color: var(--line-strong);
      transform: translateY(-1px);
    }

    .scenario.active {
      border-color: rgba(255, 152, 48, 0.6);
      background:
        linear-gradient(180deg, rgba(255, 152, 48, 0.12), transparent 26%),
        rgba(25, 31, 39, 0.98);
      box-shadow: inset 0 0 0 1px rgba(255, 152, 48, 0.1);
    }

    .scenario strong,
    .metric-card strong,
    .mini-card strong,
    .history-card strong,
    .sim-card strong,
    .link-chip strong {
      margin-bottom: 6px;
      font-size: 0.8rem;
      font-weight: 700;
      letter-spacing: 0.07em;
      text-transform: uppercase;
    }

    .builder-card {
      border-radius: 10px;
      border: 1px solid rgba(115, 168, 255, 0.22);
      background:
        linear-gradient(180deg, rgba(115, 168, 255, 0.08), transparent 28%),
        rgba(19, 27, 36, 0.98);
      gap: 10px;
    }

    .grid,
    .builder-grid {
      gap: 12px;
    }

    .field {
      gap: 6px;
    }

    .field label,
    .control-label {
      color: #d8e1ea;
      font-size: 0.78rem;
      font-weight: 700;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }

    input,
    select,
    textarea {
      border-radius: 8px;
      border-color: var(--line);
      padding: 12px 13px;
      background: #0c1117;
      color: var(--text);
      box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03);
    }

    input:hover,
    select:hover,
    textarea:hover {
      border-color: var(--line-strong);
    }

    input:focus,
    select:focus,
    textarea:focus {
      border-color: rgba(255, 152, 48, 0.78);
      box-shadow: 0 0 0 3px rgba(255, 152, 48, 0.12);
    }

    .actions {
      align-items: center;
    }

    .primary,
    .secondary,
    .toolbar-button {
      min-height: 38px;
      border-radius: 8px;
      padding: 9px 13px;
      font-size: 0.8rem;
      font-weight: 700;
      letter-spacing: 0.04em;
      text-transform: uppercase;
      transition: transform 140ms ease, border-color 140ms ease, background 140ms ease;
    }

    .primary {
      border: 1px solid rgba(255, 152, 48, 0.46);
      background: linear-gradient(180deg, #ffae56 0%, #ff9830 100%);
      color: #101418;
      box-shadow: 0 10px 22px rgba(255, 152, 48, 0.22);
    }

    .primary:hover,
    .secondary:hover,
    .toolbar-button:hover {
      transform: translateY(-1px);
    }

    .secondary,
    .toolbar-button {
      border: 1px solid var(--line);
      background: rgba(255, 255, 255, 0.035);
      color: #d4dde6;
    }

    .toolbar-button {
      margin-left: auto;
    }

    .toolbar-select {
      width: auto;
      min-width: 136px;
      padding: 9px 34px 9px 10px;
      font-size: 0.83rem;
    }

    .validation {
      border-radius: 10px;
      background: rgba(242, 73, 92, 0.08);
      border-color: rgba(242, 73, 92, 0.32);
    }

    .status {
      color: var(--muted);
      font-size: 0.9rem;
    }

    .badge,
    .muted-pill,
    .ws-badge,
    .pill {
      border: 1px solid rgba(255, 255, 255, 0.08);
      box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03);
    }

    .badge,
    .muted-pill {
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.04);
      color: var(--muted);
    }

    pre,
    .copy-box,
    .logs-wrap,
    .chart-frame,
    .event-table-wrap,
    .chaos-table-wrap {
      border-radius: 10px;
      border-color: var(--line);
      background:
        linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px),
        linear-gradient(180deg, rgba(10, 14, 19, 0.98) 0%, rgba(9, 13, 18, 0.98) 100%);
      background-size: 28px 28px, 28px 28px, auto;
    }

    .summary-card {
      border-color: rgba(255, 152, 48, 0.26);
      background:
        linear-gradient(180deg, rgba(255, 152, 48, 0.12), transparent 24%),
        linear-gradient(180deg, rgba(16, 22, 29, 0.98) 0%, rgba(12, 17, 23, 0.98) 100%);
    }

    .simulator-card {
      border-color: rgba(115, 168, 255, 0.2);
      background:
        linear-gradient(180deg, rgba(115, 168, 255, 0.08), transparent 24%),
        linear-gradient(180deg, rgba(17, 24, 31, 0.98) 0%, rgba(12, 18, 24, 0.98) 100%);
      color: var(--text);
    }

    .summary-kicker,
    .sim-kicker {
      border-radius: 999px;
      border: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 0.74rem;
      font-weight: 700;
      letter-spacing: 0.08em;
    }

    .summary-kicker {
      background: rgba(255, 152, 48, 0.12);
      color: var(--accent-strong);
    }

    .sim-kicker {
      background: rgba(115, 168, 255, 0.12);
      color: #b9d4ff;
    }

    .link-row {
      grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
      margin-bottom: 2px;
    }

    .link-chip {
      min-height: 92px;
      display: grid;
      align-content: start;
      gap: 4px;
      text-decoration: none;
    }

    .link-chip-priority {
      border-color: rgba(255, 152, 48, 0.34);
      background:
        linear-gradient(180deg, rgba(255, 152, 48, 0.12), transparent 26%),
        rgba(22, 29, 38, 0.97);
    }

    .metric-grid {
      margin-top: 14px;
    }

    .metric-card {
      min-height: 112px;
      padding: 12px;
    }

    .metric-value {
      margin-top: 8px;
      color: #f6f8fb;
      font-size: 1.48rem;
      font-weight: 700;
      letter-spacing: -0.04em;
    }

    .chart-grid {
      margin-top: 14px;
    }

    .chart-card {
      padding: 12px;
    }

    .chart-card h3 {
      font-size: 0.98rem;
      font-weight: 700;
    }

    .chart-legend,
    .chart-help,
    .table-note {
      font-size: 0.84rem;
    }

    .chart-frame {
      margin-top: 10px;
      height: 280px;
    }

    .chart-frame.large-chart {
      height: 320px;
    }

    .chart-stats {
      margin-top: 10px;
    }

    .chart-stat strong {
      color: var(--muted);
      font-size: 0.72rem;
    }

    .history-table th,
    .event-table thead th,
    .chaos-table th {
      background: rgba(19, 26, 34, 0.98);
      color: var(--muted);
    }

    .history-table th,
    .history-table td,
    .event-table td,
    .chaos-table td {
      border-bottom-color: rgba(255, 255, 255, 0.06);
    }

    .event-controls,
    .log-filter-row {
      gap: 10px;
      align-items: center;
    }

    .event-counter {
      font-size: 0.82rem;
      color: var(--muted);
      margin-left: 0;
    }

    .event-table-wrap {
      max-height: 360px;
    }

    .logs-wrap {
      background:
        linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px),
        linear-gradient(180deg, rgba(10, 14, 19, 0.98) 0%, rgba(8, 12, 16, 0.98) 100%);
      background-size: 28px 28px, 28px 28px, auto;
    }

    .log-line {
      padding: 7px 12px;
      border-bottom-color: rgba(255, 255, 255, 0.04);
    }

    .health-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
      gap: 10px;
    }

    .health-item {
      min-height: 48px;
      justify-content: flex-start;
    }

    .obs-two-col {
      gap: 16px;
    }

    .chaos-controls {
      gap: 10px;
    }

    .chaos-btn {
      border-radius: 8px;
      text-transform: uppercase;
      letter-spacing: 0.05em;
    }

    .padded-status {
      padding: 12px;
    }

    @keyframes shell-reveal {
      from {
        opacity: 0;
        transform: translateY(8px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    @media (max-width: 1180px) {
      .hero-grid,
      .layout {
        grid-template-columns: 1fr;
      }

      .hero-inline-stats {
        grid-template-columns: repeat(3, minmax(0, 1fr));
      }

      .architecture-wide {
        grid-template-columns: repeat(3, minmax(0, 1fr));
      }
    }

    @media (max-width: 980px) {
      .app-shell {
        width: min(100% - 20px, 1380px);
      }

      .topbar {
        align-items: flex-start;
      }

      .topbar,
      .topbar-meta {
        flex-direction: column;
      }

      .metric-grid,
      .scenario-grid,
      .copy-grid,
      .chart-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .hero-inline-stats {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 760px) {
      .hero,
      .card {
        padding: 16px;
      }

      .hero h1 {
        max-width: none;
        font-size: clamp(1.65rem, 9vw, 2.25rem);
      }

      .metric-grid,
      .scenario-grid,
      .copy-grid,
      .chart-grid,
      .architecture-wide,
      .info-grid,
      .sim-grid {
        grid-template-columns: 1fr;
      }

      .toolbar-button {
        margin-left: 0;
      }

      .event-counter {
        margin-left: 0;
      }

      .link-row {
        grid-template-columns: 1fr;
      }
    }

    /* ── Refined analytics dashboard refresh ── */
    :root {
      --bg: #f3f5f8;
      --surface: #ffffff;
      --surface-soft: #f7f9fc;
      --surface-accent: #eff3f8;
      --surface-raised: #f9fbfd;
      --text: #243247;
      --muted: #6f7f94;
      --line: #dfe6ef;
      --line-strong: #c8d3e1;
      --accent: #597499;
      --accent-strong: #415978;
      --accent-soft: rgba(89, 116, 153, 0.16);
      --blue: #7698bb;
      --amber: #b98a58;
      --ok-bg: #edf7f3;
      --ok-text: #3d7b69;
      --warn-bg: #fbf4ea;
      --warn-text: #9a7449;
      --danger-bg: #fbf1f2;
      --danger-text: #a25f6e;
      --shadow: 0 18px 34px rgba(33, 48, 71, 0.09);
    }

    html {
      color-scheme: light;
      scroll-behavior: smooth;
    }

    body {
      color: var(--text);
      background:
        radial-gradient(circle at top left, rgba(89, 116, 153, 0.1), transparent 20%),
        radial-gradient(circle at bottom right, rgba(118, 152, 187, 0.12), transparent 24%),
        linear-gradient(135deg, #f2f5f9 0%, #f5f7fa 48%, #eef2f6 100%);
      min-height: 100vh;
    }

    .app-shell {
      width: min(1420px, calc(100% - 28px));
      margin: 18px auto 30px;
      display: grid;
      grid-template-columns: 258px minmax(0, 1fr);
      gap: 18px;
      align-items: start;
    }

    .app-sidebar {
      position: sticky;
      top: 18px;
      display: grid;
      align-content: space-between;
      gap: 18px;
      min-height: calc(100vh - 36px);
      padding: 22px 18px;
      border-radius: 28px;
      background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.18), rgba(255, 255, 255, 0.04)),
        linear-gradient(180deg, #485b77 0%, #3b4c66 52%, #5f768f 100%);
      box-shadow: 0 20px 44px rgba(37, 49, 67, 0.2);
      color: #ffffff;
    }

    .sidebar-brand {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .sidebar-logo {
      display: grid;
      grid-template-columns: repeat(3, 8px);
      gap: 5px;
      padding: 10px;
      border-radius: 16px;
      background: rgba(255, 255, 255, 0.18);
      box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.28);
    }

    .sidebar-logo span {
      width: 8px;
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.94);
    }

    .sidebar-logo span:nth-child(1) { height: 16px; }
    .sidebar-logo span:nth-child(2) { height: 24px; }
    .sidebar-logo span:nth-child(3) { height: 12px; }

    .sidebar-title {
      font-size: 1rem;
      font-weight: 700;
      letter-spacing: 0.01em;
    }

    .sidebar-subtitle,
    .sidebar-foot-label,
    .sidebar-foot-copy {
      color: rgba(255, 255, 255, 0.78);
    }

    .sidebar-subtitle {
      margin-top: 2px;
      font-size: 0.78rem;
    }

    .sidebar-nav {
      display: grid;
      gap: 8px;
    }

    .sidebar-link {
      display: flex;
      align-items: center;
      gap: 10px;
      min-height: 42px;
      padding: 0 12px;
      border-radius: 16px;
      color: rgba(255, 255, 255, 0.9);
      text-decoration: none;
      font-size: 0.88rem;
      font-weight: 600;
      transition: background 160ms ease, transform 160ms ease;
    }

    .sidebar-link-copy {
      min-width: 0;
      flex: 1 1 auto;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 10px;
    }

    .sidebar-label {
      min-width: 0;
    }

    .sidebar-badge {
      display: none;
      padding: 3px 8px;
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.14);
      color: rgba(255, 255, 255, 0.82);
      font-size: 0.68rem;
      font-weight: 700;
      letter-spacing: 0.05em;
      text-transform: uppercase;
      white-space: nowrap;
      flex: none;
    }

    .sidebar-link:hover,
    .sidebar-link.active {
      background: rgba(255, 255, 255, 0.18);
      transform: translateX(2px);
    }

    .sidebar-icon {
      display: inline-grid;
      place-items: center;
      width: 24px;
      height: 24px;
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.2);
      font-size: 0.74rem;
      font-weight: 700;
    }

    .sidebar-footer {
      display: grid;
      gap: 6px;
      padding: 14px;
      border-radius: 18px;
      background: rgba(255, 255, 255, 0.14);
      box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2);
    }

    .sidebar-mode {
      display: grid;
      gap: 8px;
      padding-bottom: 12px;
      margin-bottom: 10px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.16);
    }

    .sidebar-mode-label {
      color: rgba(255, 255, 255, 0.78);
      font-size: 0.78rem;
      font-weight: 700;
      letter-spacing: 0.06em;
      text-transform: uppercase;
    }

    .sidebar-mode-toggle {
      width: 100%;
      border-color: rgba(255, 255, 255, 0.18);
      background: rgba(255, 255, 255, 0.12);
    }

    .sidebar-mode-toggle::before {
      background: rgba(255, 255, 255, 0.92);
      box-shadow: 0 10px 18px rgba(37, 49, 67, 0.22);
    }

    .sidebar-mode-toggle .mode-toggle-button {
      color: rgba(255, 255, 255, 0.88);
    }

    .sidebar-mode-toggle .mode-toggle-button.active {
      color: #31445f;
    }

    .sidebar-mode-hint {
      color: rgba(255, 255, 255, 0.78);
      font-size: 0.8rem;
      line-height: 1.5;
    }

    .sidebar-foot-label {
      font-size: 0.78rem;
      font-weight: 700;
      letter-spacing: 0.06em;
      text-transform: uppercase;
    }

    .sidebar-foot-copy {
      font-size: 0.82rem;
      line-height: 1.55;
    }

    .app-content-shell {
      display: grid;
      gap: 16px;
      min-width: 0;
    }

    .topbar,
    .hero,
    .card {
      border: 1px solid rgba(220, 228, 237, 0.92);
      border-radius: 28px;
      background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(250, 252, 254, 0.97));
      box-shadow: var(--shadow);
    }

    .topbar::before,
    .hero::before,
    .card::before {
      display: none;
    }

    .topbar {
      min-height: 84px;
      padding: 20px 24px;
      border-color: rgba(220, 228, 237, 0.96);
      background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.98), rgba(245, 248, 252, 0.98));
    }

    .eyebrow,
    .hero-kicker {
      min-height: 28px;
      padding: 5px 12px;
      border: 0;
      background: linear-gradient(135deg, #edf2f7, #e8eef6);
      color: #536b8c;
      box-shadow: none;
    }

    .topbar-title,
    .hero h1,
    .section-head h2,
    .section-head h3 {
      color: #31445f;
    }

    .topbar-meta {
      gap: 10px;
    }

    .topbar-side {
      display: flex;
      align-items: center;
      justify-content: flex-end;
      gap: 14px;
      flex-wrap: wrap;
      min-width: 0;
    }

    .topbar-chip,
    .hero-link-chip {
      border: 0;
      color: #60738d;
      background: linear-gradient(135deg, #f1f4f8, #eaf0f6);
      box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.7);
    }

    .topbar-chip-hot {
      color: #ffffff;
      background: linear-gradient(135deg, #556f93, #6d89ad);
    }

    .hero {
      padding: 24px 24px 18px;
      background:
        radial-gradient(circle at top right, rgba(226, 234, 244, 0.88), transparent 28%),
        radial-gradient(circle at bottom left, rgba(236, 240, 246, 0.86), transparent 24%),
        linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(251, 253, 255, 0.96));
    }

    .hero-grid-compact {
      grid-template-columns: minmax(0, 1.1fr) minmax(360px, 1fr);
      gap: 16px;
      align-items: stretch;
    }

    .hero h1 {
      max-width: 13ch;
      font-size: clamp(2rem, 3.4vw, 2.9rem);
      line-height: 1.04;
    }

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

    .hero-inline-stat {
      min-height: 108px;
      padding: 16px;
      border: 0;
      border-radius: 20px;
      box-shadow: 0 12px 22px rgba(70, 91, 120, 0.08);
    }

    .hero-inline-stat:nth-child(1) {
      background: linear-gradient(135deg, #e7edf4, #dce6f1);
    }

    .hero-inline-stat:nth-child(2) {
      background: linear-gradient(135deg, #e6eff0, #dbe7e9);
    }

    .hero-inline-stat:nth-child(3) {
      background: linear-gradient(135deg, #eceff4, #e1e7ef);
    }

    .hero-inline-stat strong {
      color: #31445f;
      font-size: 0.94rem;
      line-height: 1.45;
    }

    .hero-stat-label {
      color: #31445f;
      font-size: 0.72rem;
    }

    .hero-dropdown {
      border: 1px solid #e3eaf2;
      border-radius: 18px;
      background: #fcfdff;
      box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.9);
    }

    .hero-dropdown summary,
    .disclosure summary {
      min-height: 48px;
      color: #62748c;
      font-size: 0.8rem;
      letter-spacing: 0.07em;
      text-transform: uppercase;
      background: transparent;
    }

    .hero-dropdown summary::after,
    .disclosure summary::after {
      color: #7287a2;
    }

    .hero-dropdown-body,
    .disclosure-body {
      border-top-color: #e7edf4;
    }

    .hero p,
    .section-copy,
    .field-note,
    .preview,
    .subtle,
    .response-copy,
    .metric-subtle,
    .table-note,
    .chart-help,
    .chart-meta,
    .hero-dropdown-body p {
      color: #31445f;
    }

    .hero-link {
      color: #506885;
      border-bottom-color: rgba(80, 104, 133, 0.22);
    }

    .architecture-wide {
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 10px;
    }

    .arch-step,
    .disclosure,
    .scenario,
    .metric-card,
    .chart-card,
    .mini-card,
    .history-card,
    .sim-card,
    .item,
    .summary-shell,
    .response-summary,
    .summary-preview,
    .link-chip,
    .health-item,
    .chart-stat {
      border: 1px solid #e4ebf2;
      border-radius: 20px;
      background:
        linear-gradient(180deg, #ffffff, #fbfcfe);
      box-shadow: none;
    }

    .arch-step {
      color: #31445f;
      padding: 16px;
      min-height: 112px;
    }

    .arch-step strong {
      color: #31445f;
      margin-bottom: 8px;
      font-size: 0.78rem;
      font-weight: 700;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }

    .section-head {
      margin-bottom: 14px;
      padding-bottom: 10px;
      border-bottom-color: #e5ecf3;
    }

    .scenario-grid,
    .metric-grid,
    .copy-grid,
    .link-row {
      gap: 14px;
    }

    .scenario {
      min-height: 136px;
      padding: 16px;
    }

    .scenario:nth-child(1) {
      background: linear-gradient(135deg, #f7f9fc, #fdfdfe);
    }

    .scenario:nth-child(2) {
      background: linear-gradient(135deg, #f5f9fb, #f9fcfd);
    }

    .scenario:nth-child(3) {
      background: linear-gradient(135deg, #f6f8fb, #fbfcfd);
    }

    .scenario strong,
    .metric-card strong,
    .mini-card strong,
    .history-card strong,
    .sim-card strong,
    .link-chip strong {
      color: #586b84;
      letter-spacing: 0.05em;
    }

    .scenario.active {
      border-color: #bfd0e0;
      background: linear-gradient(135deg, #eef3f8, #f4f8fb);
      box-shadow: 0 10px 18px rgba(73, 95, 125, 0.08);
    }

    .builder-card,
    .summary-card,
    .simulator-card {
      border-radius: 22px;
      border-color: #e4ebf3;
      background:
        linear-gradient(180deg, #ffffff, #fafbfd);
      color: var(--text);
    }

    .simulator-card .section-copy,
    .simulator-card .subtle,
    .simulator-card .timeline-note {
      color: #31445f;
    }

    .sim-card {
      color: #31445f;
      display: grid;
      gap: 8px;
    }

    .sim-card .subtle {
      color: #31445f;
      font-size: 0.92rem;
    }

    .summary-kicker,
    .sim-kicker,
    .badge,
    .muted-pill,
    .ws-badge,
    .pill {
      border: 0;
      background: linear-gradient(135deg, #eef2f7, #e8eff5);
      color: #566c8a;
      box-shadow: none;
    }

    .badge.allowed,
    .pill-allowed,
    .ws-badge.connected {
      background: linear-gradient(135deg, #e9f4ef, #f4faf7);
      color: #467464;
    }

    .badge.denied,
    .pill-denied,
    .ws-badge.disconnected {
      background: linear-gradient(135deg, #f9edef, #fdf6f7);
      color: #9e6170;
    }

    .ws-badge.connecting {
      background: linear-gradient(135deg, #f1f4f8, #eef2f7);
      color: #697c95;
    }

    input,
    select,
    textarea,
    .toolbar-select,
    .log-filter-row select {
      border: 1px solid #dfe7ef;
      background: #ffffff;
      color: #31445f;
      box-shadow: none;
    }

    input:focus,
    select:focus,
    textarea:focus {
      border-color: #abc0d8;
      box-shadow: 0 0 0 4px rgba(89, 116, 153, 0.12);
    }

    .primary,
    .secondary,
    .toolbar-button,
    .chaos-btn {
      border: 0;
      border-radius: 16px;
      text-transform: none;
      letter-spacing: 0;
      box-shadow: 0 10px 18px rgba(68, 87, 112, 0.1);
    }

    .primary {
      background: linear-gradient(135deg, #516986, #6781a3);
      color: #ffffff;
    }

    .secondary,
    .toolbar-button {
      background: linear-gradient(135deg, #eef2f7, #e8edf3);
      color: #31445f;
    }

    pre,
    .copy-box,
    .logs-wrap,
    .chart-frame,
    .event-table-wrap,
    .chaos-table-wrap {
      border: 1px solid #e4ebf3;
      border-radius: 20px;
      background:
        linear-gradient(180deg, #ffffff, #fafbfd);
      color: #5f7087;
      box-shadow: none;
    }

    .field-note code,
    .item code,
    .copy-box code,
    .link-chip code,
    .metric-card code,
    .preview code,
    .response-copy code,
    .sim-card code {
      background: #edf2f7;
      color: #5a7192;
    }

    .link-chip {
      min-height: 98px;
      padding: 16px;
    }

    .link-chip-priority {
      background: linear-gradient(135deg, #eef2f7, #edf3f8);
      border-color: #d5e0ea;
    }

    .metric-card {
      min-height: 126px;
      padding: 16px;
    }

    .metric-card:nth-child(1) { background: linear-gradient(135deg, #f6f8fb, #fcfdfe); }
    .metric-card:nth-child(2) { background: linear-gradient(135deg, #f3f7fa, #fafcfd); }
    .metric-card:nth-child(3) { background: linear-gradient(135deg, #f8f5f0, #fcfbf8); }
    .metric-card:nth-child(4) { background: linear-gradient(135deg, #f3f5f9, #fafbfd); }

    .metric-value {
      color: #445a78;
      font-size: 1.65rem;
    }

    .chart-card {
      padding: 16px;
    }

    .chart-frame,
    .chart-frame.history-chart,
    .chart-frame.large-chart {
      height: 264px;
    }

    .chart-card.wide .chart-frame.large-chart {
      height: 300px;
    }

    .chart-tooltip {
      background: rgba(255, 255, 255, 0.98);
      color: #34475f;
      border: 1px solid #dfe7ef;
      box-shadow: 0 14px 28px rgba(62, 79, 103, 0.14);
    }

    .history-table th,
    .event-table thead th,
    .chaos-table th {
      background: #f6f8fb;
      color: #31445f;
      border-bottom-color: #e5ecf3;
    }

    .history-table th,
    .history-table td,
    .event-table td,
    .chaos-table td {
      border-bottom-color: #e9eff5;
      color: #5b6c83;
    }

    .event-table tbody tr:hover,
    .chaos-table tbody tr:hover {
      background: #f8fafc;
    }

    .log-line {
      border-bottom-color: #e7edf4;
    }

    .log-msg,
    .l-msg {
      color: #556882;
    }

    .log-time,
    .l-ts,
    .health-extra,
    .health-error,
    .alerts-empty,
    .logs-empty,
    .event-empty,
    .chaos-unavail {
      color: #31445f;
    }

    .health-grid {
      grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    }

    .health-item {
      min-height: 58px;
      background: linear-gradient(135deg, #f8fafc, #ffffff);
    }

    .health-dot.up   { background: #6fae97; box-shadow: 0 0 0 3px rgba(111, 174, 151, 0.18); }
    .health-dot.down { background: #b97a86; box-shadow: 0 0 0 3px rgba(185, 122, 134, 0.18); }
    .health-dot.unknown { background: #aeb9c8; }

    .alert-item,
    .alert-item.sev-critical,
    .alert-item.sev-warning,
    .alert-item.sev-info {
      border-radius: 18px;
      border: 1px solid #efe7fb;
    }

    .alert-item.sev-critical {
      background: linear-gradient(135deg, #fff0f4, #fff9fb);
    }

    .alert-item.sev-warning {
      background: linear-gradient(135deg, #fff8ec, #fffdf8);
    }

    .alert-item.sev-info {
      background: linear-gradient(135deg, #eff4f9, #f8fbfd);
    }

    .obs-two-col {
      gap: 16px;
    }

    @media (max-width: 1120px) {
      .app-shell {
        grid-template-columns: 1fr;
      }

      .app-sidebar {
        position: static;
        min-height: auto;
        grid-template-columns: 1fr;
      }

      .sidebar-nav {
        grid-template-columns: repeat(5, minmax(0, 1fr));
      }

      .sidebar-footer {
        display: none;
      }

      .hero-grid-compact {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 820px) {
      .sidebar-nav {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .topbar,
      .hero,
      .card {
        border-radius: 22px;
      }

      .hero-inline-stats,
      .architecture-wide,
      .metric-grid,
      .scenario-grid,
      .copy-grid,
      .chart-grid,
      .info-grid,
      .sim-grid,
      .obs-two-col {
        grid-template-columns: 1fr;
      }
    }

    .primary:disabled,
    .secondary:disabled,
    .toolbar-button:disabled,
    .chaos-btn:disabled {
      opacity: 0.55;
      cursor: not-allowed;
      transform: none;
      box-shadow: none;
    }

    body.mode-basic [data-advanced="true"] {
      display: none !important;
    }

    body.mode-basic #requests .section-copy,
    body.mode-basic #requests .field-note,
    body.mode-basic .scenario small,
    body.mode-basic #result .response-copy {
      display: none;
    }

    body.mode-basic #overview {
      order: 1;
    }

    body.mode-basic .sidebar-link[data-mode="advanced"].is-disabled {
      color: rgba(255, 255, 255, 0.58);
      background: rgba(255, 255, 255, 0.04);
      cursor: not-allowed;
      transform: none;
    }

    body.mode-basic .sidebar-link[data-mode="advanced"].is-disabled .sidebar-icon {
      background: rgba(255, 255, 255, 0.1);
      color: rgba(255, 255, 255, 0.7);
    }

    body.mode-basic .sidebar-link[data-mode="advanced"].is-disabled .sidebar-badge {
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }

    body.mode-basic .sidebar-link[data-mode="advanced"].is-disabled:hover,
    body.mode-basic .sidebar-link[data-mode="advanced"].is-disabled.active {
      background: rgba(255, 255, 255, 0.04);
      color: rgba(255, 255, 255, 0.58);
      transform: none;
    }

    body.mode-basic .sidebar-link[data-mode="advanced"].is-disabled:hover .sidebar-icon,
    body.mode-basic .sidebar-link[data-mode="advanced"].is-disabled.active .sidebar-icon {
      background: rgba(255, 255, 255, 0.1);
      color: rgba(255, 255, 255, 0.7);
    }

    body.mode-basic .hero-inline-stats,
    body.mode-basic .hero-dropdown {
      display: none;
    }

    body.mode-basic #requests form .grid {
      grid-template-columns: 1fr;
    }

    body.mode-basic .layout {
      grid-template-columns: 1fr;
    }

    body.mode-basic .stack {
      display: none;
    }

    body.mode-basic .scenario-grid {
      grid-template-columns: 1fr;
      margin-bottom: 14px;
    }

    body.mode-basic .quickbar-grid {
      grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    body.mode-basic .quickbar-item-wide {
      grid-column: span 1;
    }

    body.mode-basic .summary-card {
      order: -1;
    }

    body.mode-basic .app-content-shell {
      gap: 12px;
    }

    body.mode-advanced .hero-basic-note {
      display: none;
    }

    .request-quickbar {
      position: sticky;
      top: 14px;
      z-index: 20;
      display: grid;
      gap: 10px;
      padding: 14px 16px;
      border: 1px solid #d9e2ec;
      border-radius: 22px;
      background: rgba(255, 255, 255, 0.92);
      box-shadow: 0 14px 28px rgba(44, 59, 80, 0.08);
      backdrop-filter: blur(12px);
    }

    .quickbar-label {
      color: #31445f;
      font-size: 0.74rem;
      font-weight: 700;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }

    .quickbar-grid {
      display: grid;
      grid-template-columns: repeat(7, minmax(0, 1fr));
      gap: 10px;
    }

    .quickbar-item {
      display: grid;
      gap: 5px;
      padding: 10px 12px;
      border: 1px solid #e3eaf2;
      border-radius: 16px;
      background: linear-gradient(180deg, #ffffff, #f8fafc);
      min-width: 0;
    }

    .quickbar-item-wide {
      grid-column: span 2;
    }

    .quickbar-decision {
      border-width: 2px;
      box-shadow: 0 10px 22px rgba(62, 83, 110, 0.08);
      transition: border-color 180ms ease, background 180ms ease, box-shadow 180ms ease, transform 180ms ease;
    }

    .quickbar-decision strong {
      font-size: 1rem;
    }

    .quickbar-decision[data-decision-tone="allowed"] {
      border-color: rgba(47, 125, 79, 0.28);
      background: linear-gradient(180deg, #f8fdf9, #ffffff);
    }

    .quickbar-decision[data-decision-tone="denied"] {
      border-color: rgba(196, 139, 36, 0.34);
      background: linear-gradient(180deg, #fffaf1, #ffffff);
    }

    .quickbar-decision[data-decision-tone="error"] {
      border-color: rgba(154, 79, 97, 0.28);
      background: linear-gradient(180deg, #fff8fa, #ffffff);
    }

    .quickbar-decision[data-decision-tone="pending"] {
      border-color: rgba(93, 125, 163, 0.22);
      background: linear-gradient(180deg, #f8fafc, #ffffff);
    }

    .quickbar-key {
      color: #31445f;
      font-size: 0.72rem;
      font-weight: 700;
      letter-spacing: 0.07em;
      text-transform: uppercase;
    }

    .quickbar-item strong {
      color: #31445f;
      font-size: 0.92rem;
      font-weight: 700;
      line-height: 1.35;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .hero-basic-note {
      margin-top: 14px;
      max-width: 54ch;
      color: #31445f;
      font-size: 1rem;
      line-height: 1.65;
    }

    .getting-started-card {
      gap: 16px;
    }

    .getting-started-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 14px;
    }

    .getting-started-step {
      display: grid;
      gap: 8px;
      padding: 16px;
      border: 1px solid #e3eaf2;
      border-radius: 18px;
      background: linear-gradient(180deg, #ffffff, #f8fafc);
      color: #31445f;
      line-height: 1.65;
    }

    .getting-started-step strong {
      color: #31445f;
      font-size: 0.82rem;
      font-weight: 700;
      letter-spacing: 0.06em;
      text-transform: uppercase;
    }

    .getting-started-actions {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      flex-wrap: wrap;
    }

    .getting-started-note {
      flex: 1 1 320px;
      color: #31445f;
      line-height: 1.65;
    }

    .view-mode-toggle,
    .run-mode-toggle {
      position: relative;
      display: inline-grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      align-items: center;
      gap: 4px;
      padding: 4px;
      border: 1px solid #dde6ef;
      border-radius: 999px;
      background: linear-gradient(135deg, #f4f7fa, #edf2f7);
      isolation: isolate;
      overflow: hidden;
    }

    .view-mode-toggle::before,
    .run-mode-toggle::before {
      content: "";
      position: absolute;
      top: 4px;
      bottom: 4px;
      left: 4px;
      width: calc((100% - 12px) / 2);
      border-radius: 999px;
      background: linear-gradient(135deg, #516986, #6781a3);
      box-shadow: 0 10px 18px rgba(81, 105, 134, 0.22);
      transform: translateX(0);
      transition: transform 240ms cubic-bezier(0.22, 1, 0.36, 1), box-shadow 200ms ease;
      z-index: 0;
    }

    .view-mode-toggle.toggle-track-end::before,
    .run-mode-toggle.toggle-track-end::before {
      transform: translateX(calc(100% + 4px));
    }

    .mode-toggle-button {
      position: relative;
      z-index: 1;
      min-height: 34px;
      padding: 0 14px;
      border: 0;
      border-radius: 999px;
      background: transparent;
      color: #31445f;
      font-size: 0.9rem;
      font-weight: 700;
      line-height: 1;
      box-shadow: none;
      transition: color 180ms ease, transform 160ms ease;
    }

    .mode-toggle-button:hover {
      transform: translateY(-1px);
    }

    .mode-toggle-button:active {
      transform: scale(0.98);
    }

    .mode-toggle-button.active {
      background: transparent;
      color: #ffffff;
    }

    .control-strip {
      display: grid;
      gap: 12px;
      padding: 16px;
      border: 1px solid #e4ebf3;
      border-radius: 20px;
      background: linear-gradient(135deg, #fafbfd, #f4f7fb);
    }

    .run-mode-row {
      display: flex;
      justify-content: space-between;
      gap: 12px;
      align-items: center;
      flex-wrap: wrap;
    }

    .stream-controls {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-wrap: wrap;
      min-width: 0;
    }

    .run-mode-hint {
      color: #5f728b;
      font-size: 0.84rem;
      line-height: 1.5;
    }

    .stream-presets {
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
    }

    .stream-preset {
      min-height: 34px;
      padding: 0 12px;
      border: 1px solid #d8e2ec;
      border-radius: 999px;
      background: #ffffff;
      color: #31445f;
      font-size: 0.82rem;
      font-weight: 700;
      box-shadow: none;
    }

    .stream-preset:hover {
      border-color: #b7c8d9;
      background: #f8fafc;
    }

    .stream-field {
      max-width: 160px;
      min-width: 140px;
    }

    .stream-field label {
      font-size: 0.72rem;
    }

    .stream-hint {
      color: #31445f;
      font-size: 0.82rem;
      line-height: 1.5;
    }

    .stream-hint code {
      background: #edf2f7;
      color: #5a7192;
      padding: 2px 6px;
      border-radius: 999px;
    }

    .spike-controls {
      display: grid;
      grid-template-columns: minmax(0, 1fr) minmax(140px, 180px);
      gap: 10px 14px;
      align-items: end;
      min-width: 0;
      padding: 10px 12px;
      border: 1px solid #e4ebf3;
      border-radius: 18px;
      background: rgba(255, 255, 255, 0.78);
    }

    .spike-controls.is-disabled {
      background: #f8fafc;
    }

    .spike-controls.is-disabled .spike-profile-field,
    .spike-controls.is-disabled .spike-hint {
      opacity: 0.7;
    }

    .spike-toggle {
      display: flex;
      align-items: center;
      gap: 10px;
      color: #31445f;
      font-size: 0.88rem;
      font-weight: 700;
      line-height: 1.45;
      cursor: pointer;
    }

    .spike-toggle input {
      width: 18px;
      height: 18px;
      margin: 0;
      accent-color: #5d7da3;
      flex: none;
    }

    .spike-profile-field {
      max-width: none;
      min-width: 0;
      margin: 0;
    }

    .spike-hint {
      grid-column: 1 / -1;
      margin-top: -2px;
    }

    .action-strip {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-wrap: wrap;
    }

    .action-strip .primary,
    .action-strip .secondary {
      min-width: 136px;
    }

    .status {
      flex: 1 1 240px;
      min-width: 220px;
    }

    .stop-stream {
      background: linear-gradient(135deg, #f7eef0, #fbf6f7);
      color: #955c68;
    }

    .stream-summary {
      min-height: 1.4em;
      color: #31445f;
      font-size: 0.88rem;
      line-height: 1.5;
    }

    .response-raw {
      border: 1px solid #e4ebf3;
      border-radius: 20px;
      background: linear-gradient(180deg, #ffffff, #fafbfd);
    }

    .response-raw summary {
      min-height: 52px;
      padding: 0 18px;
      display: flex;
      align-items: center;
      color: #31445f;
      font-size: 0.82rem;
      font-weight: 700;
      letter-spacing: 0.05em;
      text-transform: uppercase;
      cursor: pointer;
      list-style: none;
    }

    .response-raw summary::-webkit-details-marker {
      display: none;
    }

    .response-raw pre {
      margin: 0;
      border: 0;
      border-top: 1px solid #e4ebf3;
      border-radius: 0 0 20px 20px;
      box-shadow: none;
    }

    [hidden] {
      display: none !important;
    }

    @media (max-width: 1120px) {
      .quickbar-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
      }

      .quickbar-item-wide {
        grid-column: span 2;
      }

      .getting-started-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 820px) {
      .request-quickbar {
        top: 10px;
      }

      .quickbar-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .quickbar-item-wide {
        grid-column: span 2;
      }

      body.mode-basic .quickbar-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .run-mode-row,
      .stream-controls,
      .action-strip,
      .getting-started-actions {
        flex-direction: column;
        align-items: stretch;
      }

      .stream-field,
      .status {
        max-width: none;
        min-width: 0;
      }

      .view-mode-toggle,
      .run-mode-toggle {
        width: 100%;
        justify-content: stretch;
      }

      .mode-toggle-button {
        flex: 1 1 0;
      }

      .stream-presets {
        width: 100%;
      }

      .stream-preset {
        flex: 1 1 0;
        text-align: center;
      }

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

      .spike-toggle {
        align-items: flex-start;
      }
    }

    body.mode-advanced .quickbar-grid {
      grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    .guide-card {
      box-shadow: none;
    }

    .guide-overview {
      display: grid;
      gap: 14px;
      margin-bottom: 14px;
      padding: 18px 20px;
      border: 1px solid #e4ebf2;
      border-radius: 20px;
      background: linear-gradient(180deg, #fcfdff, #f8fbfd);
    }

    .guide-overview-lead {
      color: #31445f;
      font-size: 0.98rem;
      font-weight: 600;
      line-height: 1.7;
    }

    .guide-overview-grid,
    .guide-intro-grid {
      display: grid;
      gap: 12px;
    }

    .guide-overview-grid {
      grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .guide-intro-grid {
      grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .guide-overview-card,
    .guide-intro-card {
      display: grid;
      gap: 8px;
      padding: 14px 16px;
      border: 1px solid #e6edf4;
      border-radius: 18px;
      background: rgba(255, 255, 255, 0.88);
    }

    .guide-overview-card strong,
    .guide-intro-card strong,
    .guide-block > strong {
      color: #31445f;
      font-size: 0.9rem;
      font-weight: 700;
      letter-spacing: 0.01em;
      text-transform: none;
    }

    .guide-overview-card p,
    .guide-intro-card p {
      margin: 0;
      color: #60738d;
      font-size: 0.9rem;
      line-height: 1.65;
    }

    .guide-drawer {
      margin-top: 0;
    }

    .guide-drawer-body {
      display: grid;
      gap: 18px;
    }

    .request-advanced-drawer {
      margin-bottom: 16px;
    }

    .request-advanced-body {
      padding-top: 18px;
    }

    .guide-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 14px;
    }

    .guide-block {
      display: grid;
      gap: 12px;
      padding: 16px;
      border: 1px solid #e8eef4;
      border-radius: 18px;
      background: #fcfdff;
    }

    .guide-block .list {
      gap: 10px;
      margin-top: 0;
    }

    .guide-block .item {
      padding: 12px 13px;
      background: #f8fbfd;
      line-height: 1.6;
    }

    .guide-block .item strong {
      margin-bottom: 2px;
    }

    .builder-slider-shell {
      display: grid;
      grid-template-columns: minmax(0, 1fr) 88px;
      gap: 12px;
      align-items: center;
    }

    .builder-slider {
      width: 100%;
      min-height: 0;
      margin: 0;
      padding: 0;
      border: 0;
      border-radius: 999px;
      background: transparent;
      box-shadow: none;
      accent-color: #5d7da3;
      cursor: pointer;
    }

    .builder-slider:hover,
    .builder-slider:focus {
      border-color: transparent;
      box-shadow: none;
    }

    .builder-slider-input {
      text-align: right;
    }

    @media (max-width: 820px) {
      .topbar-side {
        width: 100%;
      }

      .topbar-side {
        justify-content: flex-start;
      }

      body.mode-advanced .quickbar-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .guide-overview-grid,
      .guide-intro-grid,
      .guide-grid {
        grid-template-columns: 1fr;
      }
    }

    .app-content-shell > * {
      order: 20;
    }

    #dashboardTopbar {
      order: 0;
    }

    #overview {
      order: 1;
    }

    .request-quickbar {
      order: 2;
    }

    #requests {
      order: 3;
    }

    #result {
      order: 4;
    }

    #apiExamples {
      order: 5;
    }

    #recentRequestsSection {
      order: 6;
    }

    .getting-started-card {
      order: 7;
    }

    .info-grid {
      order: 8;
    }

    #observability {
      order: 9;
    }

    .app-content-shell > .card[data-advanced-panel="observe"]:not(#observability) {
      order: 10;
    }

    .obs-two-col {
      order: 11;
    }

    #events {
      order: 12;
    }

    #chaos {
      order: 13;
    }

    .decision-headline {
      margin-bottom: 10px;
      color: #31445f;
      font-size: clamp(1.15rem, 2vw, 1.45rem);
      font-weight: 700;
      letter-spacing: -0.02em;
    }

    .next-step {
      display: grid;
      gap: 6px;
      margin-top: 14px;
      padding: 14px 16px;
      border: 1px solid #e4ebf2;
      border-radius: 18px;
      background: linear-gradient(180deg, #f8fafd, #fdfefe);
      color: #31445f;
    }

    .next-step strong {
      color: #5c6f88;
      font-size: 0.78rem;
      font-weight: 700;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }

    .tool-drawer {
      margin-top: 16px;
      border: 1px solid #e4ebf2;
      border-radius: 20px;
      background: linear-gradient(180deg, #ffffff, #fafbfd);
      overflow: hidden;
    }

    .tool-drawer summary {
      min-height: 52px;
      padding: 0 18px;
      display: flex;
      align-items: center;
      cursor: pointer;
      list-style: none;
      color: #62748c;
      font-size: 0.8rem;
      font-weight: 700;
      letter-spacing: 0.07em;
      text-transform: uppercase;
    }

    .tool-drawer summary::-webkit-details-marker {
      display: none;
    }

    .tool-drawer summary::after {
      content: "+";
      margin-left: auto;
      color: #7287a2;
      font-size: 1.1rem;
      line-height: 1;
    }

    .tool-drawer[open] summary::after {
      content: "-";
    }

    .tool-drawer-body {
      display: grid;
      gap: 14px;
      padding: 0 18px 18px;
      border-top: 1px solid #e7edf4;
    }

    .tool-drawer-chart .tool-drawer-body {
      padding-top: 18px;
    }

    .utility-panel {
      padding: 0;
      overflow: hidden;
    }

    .utility-panel summary {
      min-height: 60px;
      padding: 0 22px;
      display: flex;
      align-items: center;
      cursor: pointer;
      list-style: none;
      color: #31445f;
      font-size: 0.96rem;
      font-weight: 700;
      letter-spacing: -0.01em;
    }

    .utility-panel summary::-webkit-details-marker {
      display: none;
    }

    .utility-panel summary::after {
      content: "+";
      margin-left: auto;
      color: #7287a2;
      font-size: 1.15rem;
      line-height: 1;
    }

    .utility-panel[open] summary::after {
      content: "-";
    }

    .utility-panel-body {
      display: grid;
      gap: 16px;
      padding: 0 22px 22px;
      border-top: 1px solid #e8eef4;
    }

    .embedded-utility-card {
      padding: 0;
      border: 0;
      background: transparent;
      box-shadow: none;
    }

    .utility-two-col {
      gap: 20px;
    }

    .observe-secondary-panel {
      box-shadow: none;
    }

    .chart-card-secondary {
      padding: 0;
      border: 0;
      background: transparent;
      box-shadow: none;
    }

    #observability .metric-grid {
      grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .toolbar-input {
      min-height: 40px;
      width: min(280px, 100%);
      padding: 0 12px;
      border: 1px solid #dfe7ef;
      border-radius: 12px;
      background: #ffffff;
      color: #31445f;
    }

    .toolbar-input:focus {
      outline: none;
      border-color: #abc0d8;
      box-shadow: 0 0 0 4px rgba(89, 116, 153, 0.12);
    }

    .scenario,
    .metric-card,
    .chart-card,
    .mini-card,
    .history-card,
    .sim-card,
    .event-detail-card,
    .event-detail-item,
    .quickbar-item {
      border-color: #e8eef4;
      background: #fcfdff;
    }

    .toolbar-button.active {
      background: linear-gradient(135deg, #516986, #6781a3);
      color: #ffffff;
    }

    .event-feed-status {
      margin: 8px 0 12px;
      color: #62748c;
      font-size: 0.88rem;
      line-height: 1.5;
    }

    .event-table tbody tr {
      cursor: pointer;
    }

    .event-table tbody tr.active {
      background: #eef3f8;
    }

    .event-detail-card {
      display: grid;
      gap: 12px;
      margin-top: 14px;
      padding: 16px;
      border: 1px solid #e4ebf2;
      border-radius: 20px;
      background: linear-gradient(180deg, #ffffff, #fbfcfe);
    }

    .event-detail-empty,
    .event-detail-content {
      color: #31445f;
    }

    .event-detail-empty {
      min-height: 52px;
      display: grid;
      align-items: center;
      padding: 14px 16px;
      border: 1px dashed #d4dfeb;
      border-radius: 16px;
      background: #f8fbfd;
    }

    .event-detail-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 12px;
    }

    .event-detail-item {
      display: grid;
      gap: 4px;
      padding: 12px 14px;
      border: 1px solid #e4ebf2;
      border-radius: 16px;
      background: linear-gradient(180deg, #ffffff, #fbfcfe);
    }

    .event-detail-item strong {
      color: #5c6f88;
      font-size: 0.72rem;
      font-weight: 700;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }

    .event-detail-item-wide {
      grid-column: span 2;
    }

    .event-detail-json {
      margin-top: 12px;
      max-height: 280px;
    }

    .chart-help {
      display: none;
    }

    .chaos-safety {
      display: grid;
      gap: 6px;
      margin-bottom: 14px;
      padding: 14px 16px;
      border: 1px solid #efd9df;
      border-radius: 18px;
      background: linear-gradient(180deg, #fff7f8, #fffdfd);
      color: #8f5e6b;
    }

    .chaos-safety strong {
      font-size: 0.8rem;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }

    .chaos-confirm {
      display: grid;
      gap: 12px;
      margin-bottom: 14px;
      padding: 16px;
      border: 1px solid #e7d7dc;
      border-radius: 20px;
      background: linear-gradient(180deg, #fffafb, #fffefe);
    }

    .chaos-confirm-copy {
      display: grid;
      gap: 6px;
      color: #31445f;
      line-height: 1.55;
    }

    .chaos-confirm-actions {
      display: flex;
      gap: 10px;
      flex-wrap: wrap;
    }

    @media (max-width: 980px) {
      .guide-grid,
      #observability .metric-grid,
      .event-detail-grid {
        grid-template-columns: 1fr;
      }

      .event-detail-item-wide {
        grid-column: auto;
      }
    }

    @media (max-width: 820px) {
      .toolbar-input {
        width: 100%;
      }

      .chaos-confirm-actions {
        flex-direction: column;
      }

      .utility-panel summary {
        padding-left: 18px;
        padding-right: 18px;
      }

      .utility-panel-body {
        padding-left: 18px;
        padding-right: 18px;
      }
    }

    .section-copy,
    .field-note,
    .subtle,
    .table-note,
    .metric-subtle,
    .chart-meta,
    .event-feed-status {
      color: #5f728b;
    }

    a:focus-visible,
    button:focus-visible,
    input:focus-visible,
    select:focus-visible,
    summary:focus-visible {
      outline: 2px solid #5d7da3;
      outline-offset: 3px;
      box-shadow: 0 0 0 5px rgba(93, 125, 163, 0.16);
    }

    .scenario {
      min-height: 104px;
      gap: 8px;
      align-content: start;
    }

    .scenario-subtitle {
      color: #5f728b;
      line-height: 1.45;
      font-size: 0.94rem;
    }

    .scenario-recommendation {
      display: inline-flex;
      align-items: center;
      margin-top: 4px;
      padding: 4px 9px;
      border-radius: 999px;
      background: #eef3f8;
      color: #536b8c;
      font-size: 0.74rem;
      font-weight: 700;
      line-height: 1.4;
      width: fit-content;
      max-width: 100%;
    }

    .result-verdict-shell {
      display: grid;
      gap: 6px;
      margin-bottom: 14px;
      padding: 16px 18px;
      border: 1px solid #e4ebf3;
      border-radius: 22px;
      background: #fcfdff;
      transition: border-color 180ms ease, background 180ms ease, box-shadow 180ms ease;
    }

    .result-verdict {
      color: #31445f;
      font-size: clamp(1.5rem, 3.2vw, 2.1rem);
      font-weight: 800;
      letter-spacing: -0.04em;
      line-height: 1.05;
    }

    .result-meta {
      color: #5f728b;
      font-size: 0.94rem;
      line-height: 1.5;
    }

    .verdict-idle,
    .verdict-pending {
      color: #5f728b;
    }

    .verdict-allowed {
      color: #2f7d4f;
    }

    .verdict-denied {
      color: #8c5a13;
    }

    .verdict-error {
      color: #9a4f61;
    }

    #result.result-allowed .result-verdict-shell {
      border-color: rgba(47, 125, 79, 0.22);
      background: linear-gradient(180deg, #f8fdf9, #ffffff);
    }

    #result.result-denied .result-verdict-shell {
      border-color: rgba(196, 139, 36, 0.26);
      background: linear-gradient(180deg, #fffaf1, #ffffff);
    }

    #result.result-error .result-verdict-shell {
      border-color: rgba(154, 79, 97, 0.24);
      background: linear-gradient(180deg, #fff8fa, #ffffff);
    }

    #result.result-pending .result-verdict-shell {
      border-color: rgba(98, 116, 140, 0.18);
      background: linear-gradient(180deg, #f8fafc, #ffffff);
    }

    #result.result-updated .result-verdict-shell {
      animation: resultPulse 420ms ease;
    }

    @keyframes resultPulse {
      0% {
        transform: translateY(2px);
        box-shadow: 0 0 0 0 rgba(93, 125, 163, 0);
      }
      45% {
        transform: translateY(0);
        box-shadow: 0 18px 28px rgba(93, 125, 163, 0.1);
      }
      100% {
        transform: translateY(0);
        box-shadow: 0 0 0 0 rgba(93, 125, 163, 0);
      }
    }

    .empty-state {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      min-width: 0;
      padding: 12px 14px;
      border: 1px dashed #d7e1eb;
      border-radius: 16px;
      background: #f8fbfd;
      color: #5f728b;
      line-height: 1.5;
      text-align: left;
    }

    .chart-empty .empty-state {
      width: min(320px, 100%);
      justify-content: center;
      flex-direction: column;
      text-align: center;
      margin: 0 auto;
    }

    .empty-state-icon {
      width: 24px;
      height: 24px;
      display: inline-grid;
      place-items: center;
      border-radius: 999px;
      background: #e8eef4;
      color: #62748c;
      font-size: 0.84rem;
      font-weight: 700;
      flex: none;
    }

    .empty-state-success {
      border-color: #d7eadc;
      background: #f8fdf9;
    }

    .empty-state-success .empty-state-icon {
      background: #e4f3e8;
      color: #2f7d4f;
    }

    .empty-state-error {
      border-color: #ecd9df;
      background: #fff9fb;
    }

    .empty-state-error .empty-state-icon {
      background: #f6e7ec;
      color: #9a4f61;
    }

    .placeholder-stack {
      display: grid;
      gap: 10px;
    }

    .placeholder-row {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      width: 100%;
    }

    .skeleton-line,
    .skeleton-card,
    .skeleton-chip {
      display: block;
      background: linear-gradient(90deg, #edf2f7 20%, #f8fbfd 50%, #edf2f7 80%);
      background-size: 200% 100%;
      animation: skeletonShift 1.4s ease-in-out infinite;
    }

    .skeleton-line {
      height: 12px;
      width: 100%;
      border-radius: 999px;
    }

    .skeleton-line-short {
      width: 58%;
    }

    .skeleton-line-long {
      width: 82%;
    }

    .skeleton-card {
      width: 100%;
      height: 56px;
      border-radius: 16px;
    }

    .skeleton-card-short {
      width: 72%;
    }

    .skeleton-chip {
      width: 132px;
      height: 34px;
      border-radius: 999px;
    }

    .skeleton-chip-short {
      width: 104px;
    }

    .skeleton-chip-long {
      width: 168px;
    }

    .placeholder-log {
      padding: 12px;
    }

    @keyframes skeletonShift {
      0% {
        background-position: 200% 0;
      }
      100% {
        background-position: -200% 0;
      }
    }

    #observability .section-head {
      margin-bottom: 14px;
    }

    #observability .metric-grid,
    #observability .chart-grid {
      gap: 10px;
      margin-top: 12px;
    }

    #observability .metric-card,
    #observability .chart-card {
      padding: 12px 14px;
    }

    #observability .tool-drawer,
    .observe-secondary-panel {
      margin-top: 12px;
    }

    .utility-panel-body {
      gap: 14px;
    }

    .health-grid .empty-state,
    .alerts-list .empty-state {
      width: 100%;
    }

    .logs-wrap > .empty-state {
      margin: 12px;
    }

    @media (max-width: 900px) {
      .run-mode-row,
      .action-strip,
      .event-controls,
      .section-title-row {
        flex-direction: column;
        align-items: stretch;
      }

      .event-counter {
        margin-left: 0;
      }

      .chart-stats {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 640px) {
      .topbar-meta {
        display: none;
      }

      .beginner-steps,
      .beginner-live-grid {
        grid-template-columns: 1fr;
      }

      .scenario {
        min-height: 88px;
        padding: 16px;
      }

      .mode-toggle-button,
      .stream-preset,
      .toolbar-button,
      .primary,
      .secondary {
        min-height: 46px;
      }

      .view-mode-toggle::before,
      .run-mode-toggle::before {
        top: 5px;
        bottom: 5px;
      }

      .action-strip .primary,
      .action-strip .secondary {
        width: 100%;
      }

      .quickbar-item strong {
        white-space: normal;
      }

      .event-table td,
      .event-table thead th {
        padding-left: 10px;
        padding-right: 10px;
      }
    }