:root {
        color-scheme: light;
        --bg: #fcfcfd;
        --surface: #ffffff;
        --surface-soft: #fafafa;
        --surface-strong: #f4f4f5;
        --border: #e5e7eb;
        --border-strong: #d4d4d8;
        --text: #111827;
        --text-soft: #6b7280;
        --text-faint: #9ca3af;
        --primary: #6f63c2;
        --primary-strong: #5d52b7;
        --primary-soft: rgba(111, 99, 194, 0.12);
        --primary-muted: rgba(111, 99, 194, 0.18);
        --primary-line: rgba(111, 99, 194, 0.34);
        --good: #047857;
        --good-soft: rgba(4, 120, 87, 0.12);
        --warn: #b45309;
        --warn-soft: rgba(180, 83, 9, 0.14);
        --danger: #b91c1c;
        --danger-soft: rgba(185, 28, 28, 0.12);
        --shadow-card: 0 1px 2px rgba(15, 23, 42, 0.04), 0 8px 30px rgba(15, 23, 42, 0.04);
        --shadow-card-hover: 0 10px 40px rgba(15, 23, 42, 0.08);
        --radius-card: 18px;
        --radius-control: 12px;
        --content-max: 1200px;
        --mono: "SFMono-Regular", ui-monospace, Menlo, Monaco, Consolas, monospace;
      }

      * { box-sizing: border-box; }
      html, body { margin: 0; padding: 0; }
      body {
        min-width: 360px;
        background: var(--bg);
        color: var(--text);
        font-family: Inter, "SF Pro Text", "Segoe UI", system-ui, sans-serif;
        line-height: 1.5;
      }

      .app {
        width: min(100%, var(--content-max));
        margin: 0 auto;
        min-height: 100vh;
        padding: 24px 20px 64px;
        display: flex;
        flex-direction: column;
        gap: 20px;
      }

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

      .app__header-top {
        width: 100%;
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
      }

      .brand-link {
        display: inline-flex;
        align-items: center;
        min-width: 0;
        color: inherit;
        text-decoration: none;
      }

      .app__brand {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        min-width: 0;
      }

      .app__logo {
        width: 28px;
        height: 28px;
        flex: 0 0 28px;
        border-radius: 8px;
        background:
          linear-gradient(135deg, rgba(111,99,194,0.92), rgba(93,82,183,0.72));
        position: relative;
        overflow: hidden;
      }
      .app__logo::before,
      .app__logo::after {
        content: "";
        position: absolute;
        inset: auto;
        border-radius: 999px;
        background: rgba(255,255,255,0.9);
      }
      .app__logo::before {
        width: 16px;
        height: 3px;
        left: 6px;
        top: 8px;
        transform: rotate(-12deg);
      }
      .app__logo::after {
        width: 18px;
        height: 3px;
        left: 5px;
        top: 16px;
        opacity: 0.75;
      }

      .app__title {
        margin: 0;
        font-size: clamp(1rem, 1.8vw, 1.16rem);
        line-height: 1.05;
        letter-spacing: -0.03em;
        font-weight: 650;
        white-space: nowrap;
      }

      .global-nav {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        gap: 14px;
      }

      .global-nav a {
        color: var(--text-soft);
        text-decoration: none;
        font-size: 12px;
        font-weight: 600;
        line-height: 1.2;
        padding: 2px 0;
      }

      .global-nav a:hover { color: var(--text); }
      .global-nav a.is-active {
        color: var(--primary-strong);
        border-bottom: 2px solid var(--primary-strong);
      }

      .page__content {
        display: grid;
        gap: 18px;
      }

      .hero-head {
        display: flex;
        flex-direction: column;
        gap: 8px;
      }

      .eyebrow {
        margin: 0;
        font-size: 11px;
        font-weight: 700;
        letter-spacing: 0.12em;
        text-transform: uppercase;
        color: var(--text-faint);
      }

      .page-title {
        margin: 0;
        font-size: clamp(1.5rem, 5vw, 2.1rem);
        line-height: 1.02;
        letter-spacing: -0.05em;
        font-weight: 770;
      }

      .page-subtitle {
        margin: 0;
        max-width: 760px;
        color: var(--text-soft);
        font-size: 14px;
      }

      .card {
        background: var(--surface);
        border: 1px solid var(--border);
        border-radius: var(--radius-card);
        box-shadow: var(--shadow-card);
      }
      .card:hover { box-shadow: var(--shadow-card-hover); }

      .controls-card { padding: 12px 14px; }
      .controls-grid {
        display: grid;
        grid-template-columns: minmax(118px, .65fr) minmax(200px, 1.15fr) minmax(120px, .75fr) minmax(144px, .7fr) auto auto auto;
        gap: 8px 12px;
        align-items: end;
      }

      .field {
        display: flex;
        flex-direction: column;
        gap: 6px;
        font-size: 10px;
        color: var(--text-faint);
        letter-spacing: 0.02em;
        font-weight: 700;
        text-transform: uppercase;
      }

      .field input,
      .field select,
      .button,
      .mode-chip {
        height: 38px;
        border-radius: var(--radius-control);
        border: 1px solid var(--border);
        background: var(--surface);
        color: var(--text);
        font-size: 14px;
        padding: 0 12px;
        outline: none;
      }

      .field input:focus,
      .field select:focus,
      .button:focus,
      .mode-chip:focus {
        border-color: var(--primary);
        box-shadow: 0 0 0 4px rgba(111, 99, 194, 0.12);
      }

      .mode-group {
        display: flex;
        align-items: center;
        gap: 8px;
        flex-wrap: wrap;
      }
      .mode-chip {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        font-weight: 700;
        cursor: pointer;
        background: var(--surface-soft);
      }
      .mode-chip.is-active {
        background: var(--primary-soft);
        border-color: rgba(111, 99, 194, 0.24);
        color: var(--primary-strong);
      }

      .button {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        font-weight: 600;
        cursor: pointer;
      }
      .button--primary {
        background: var(--text);
        border-color: var(--text);
        color: #fff;
      }
      .button--ghost { background: var(--surface-soft); }

      .status-inline {
        min-height: 38px;
        display: flex;
        align-items: center;
        font-size: 11px;
        color: var(--text-soft);
        font-family: var(--mono);
      }
      .status-inline strong {
        margin-left: 6px;
        color: var(--text);
        font-weight: 700;
      }

      .note-card {
        padding: 12px 14px;
        display: grid;
        gap: 10px;
      }
      .flow-note {
        color: var(--warn);
        background: #fff7ed;
        border: 1px solid #fed7aa;
        border-radius: 12px;
        padding: 10px 12px;
        font-size: 12px;
      }
      .flow-note--quiet {
        color: #475569;
        background: #f8fafc;
        border-color: #cbd5e1;
      }

      .signal-grid {
        display: grid;
        grid-template-columns: repeat(4, minmax(0, 1fr));
        gap: 12px;
      }
      .signal-card {
        padding: 16px;
        display: grid;
        gap: 8px;
        align-content: start;
        min-height: 132px;
      }
      .signal-label {
        font-size: 11px;
        letter-spacing: 0.08em;
        text-transform: uppercase;
        color: var(--text-faint);
        font-weight: 700;
      }
      .pill {
        width: fit-content;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        min-height: 32px;
        padding: 0 12px;
        border-radius: 999px;
        font-size: 13px;
        font-weight: 700;
        border: 1px solid transparent;
      }
      .pill--good { color: var(--good); background: var(--good-soft); border-color: rgba(4,120,87,.16); }
      .pill--warn { color: var(--warn); background: var(--warn-soft); border-color: rgba(180,83,9,.16); }
      .pill--danger { color: var(--danger); background: var(--danger-soft); border-color: rgba(185,28,28,.16); }
      .pill--primary { color: var(--primary-strong); background: var(--primary-soft); border-color: rgba(111,99,194,.14); }

      .hero-value,
      .metric-value,
      .mono-line,
      .snapshot-value,
      .route-value,
      .route-subvalue {
        font-family: var(--mono);
      }
      .hero-value {
        font-size: clamp(28px, 4vw, 38px);
        line-height: 1;
        letter-spacing: -0.06em;
        font-weight: 780;
      }
      .copy,
      .meta,
      .subcopy,
      .mono-line {
        font-size: 13px;
        color: var(--text-soft);
      }
      .copy { color: var(--text); }

      .badge-row,
      .meta-chip-row {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
      }
      .meta-chip {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 6px 10px;
        border-radius: 999px;
        border: 1px solid var(--border);
        background: var(--surface-soft);
        font-size: 12px;
        color: var(--text);
      }

      .metrics-grid {
        display: grid;
        grid-template-columns: repeat(7, minmax(0, 1fr));
        gap: 12px;
      }
      .metric-card {
        padding: 16px;
        min-height: 96px;
        display: flex;
        flex-direction: column;
        justify-content: space-between;
        gap: 8px;
      }
      .metric-label {
        font-size: 11px;
        letter-spacing: 0.08em;
        text-transform: uppercase;
        color: var(--text-faint);
        font-weight: 700;
      }
      .metric-value {
        font-size: clamp(1rem, 1.9vw, 1.45rem);
        line-height: 1.05;
        letter-spacing: -0.04em;
        font-weight: 760;
      }
      .metric-sub { font-size: 12px; color: var(--text-soft); }
      .metric-card--highlight {
        border-color: rgba(111, 99, 194, 0.22);
        background: linear-gradient(180deg, rgba(111, 99, 194, 0.04), rgba(111, 99, 194, 0.01));
      }

      .section-head {
        display: flex;
        align-items: flex-start;
        justify-content: space-between;
        gap: 12px;
        flex-wrap: wrap;
        margin-bottom: 12px;
      }
      .section-title {
        margin: 0;
        font-size: 19px;
        line-height: 1.1;
        letter-spacing: -0.03em;
        font-weight: 740;
      }
      .section-note {
        margin: 4px 0 0;
        font-size: 13px;
        color: var(--text-soft);
        max-width: 760px;
      }

      .mainviz-card,
      .why-card,
      .candidates-card,
      .snapshot-card,
      .debug-card {
        padding: 18px 20px;
      }

      .mainviz-layout {
        display: grid;
        grid-template-columns: minmax(0, 1.58fr) minmax(320px, .92fr);
        gap: 16px;
      }
      .viz-panel,
      .viz-side,
      .why-panel,
      .candidate-card,
      .snapshot-strip,
      .snapshot-note-card {
        border: 1px solid var(--border);
        border-radius: 16px;
        background: linear-gradient(180deg, rgba(250,250,250,.65), rgba(255,255,255,.98));
      }
      .viz-panel {
        padding: 16px;
        display: grid;
        gap: 14px;
      }
      .depth-shell {
        border: 1px dashed rgba(111, 99, 194, 0.22);
        border-radius: 14px;
        padding: 14px;
        background:
          radial-gradient(circle at 50% 50%, rgba(111, 99, 194, 0.08), transparent 40%),
          linear-gradient(180deg, rgba(250, 250, 250, 0.95), rgba(255,255,255,0.98));
      }
      .depth-stage {
        display: grid;
        gap: 14px;
      }
      .depth-caption {
        display: flex;
        justify-content: space-between;
        gap: 12px;
        flex-wrap: wrap;
        font-size: 12px;
        color: var(--text-soft);
      }
      .depth-bands {
        display: grid;
        gap: 10px;
      }
      .depth-row {
        display: grid;
        grid-template-columns: 92px minmax(0, 1fr) 54px;
        gap: 12px;
        align-items: center;
      }
      .depth-name {
        font-size: 13px;
        font-weight: 650;
      }
      .depth-track {
        position: relative;
        height: 16px;
        border-radius: 999px;
        background: #eef2ff;
        overflow: hidden;
        border: 1px solid #e4e7f4;
      }
      .depth-fill {
        position: absolute;
        inset: 0 auto 0 0;
        border-radius: inherit;
        background: linear-gradient(90deg, rgba(111,99,194,.24), rgba(111,99,194,.86));
        width: var(--w, 50%);
      }
      .depth-fill.depth-fill--warn {
        background: linear-gradient(90deg, rgba(180,83,9,.22), rgba(180,83,9,.82));
      }
      .depth-fill.depth-fill--danger {
        background: linear-gradient(90deg, rgba(185,28,28,.22), rgba(185,28,28,.82));
      }
      .depth-value {
        font-size: 12px;
        color: var(--text-soft);
        text-align: right;
        font-family: var(--mono);
      }

      .mix-card {
        border: 1px solid var(--border);
        border-radius: 14px;
        padding: 14px;
        background: var(--surface);
        display: grid;
        gap: 12px;
      }
      .mix-track {
        position: relative;
        height: 18px;
        border-radius: 999px;
        overflow: hidden;
        background: #eef2f7;
        border: 1px solid #e7eaf3;
        display: flex;
      }
      .mix-segment { height: 100%; width: var(--w, 0%); }
      .mix-segment--book { background: rgba(111, 99, 194, 0.92); }
      .mix-segment--amm { background: rgba(111, 99, 194, 0.46); }
      .mix-segment--bridge { background: rgba(180, 83, 9, 0.72); }
      .mix-legend {
        display: flex;
        flex-wrap: wrap;
        gap: 10px 12px;
        font-size: 12px;
        color: var(--text-soft);
      }
      .mix-legend span {
        display: inline-flex;
        align-items: center;
        gap: 6px;
      }
      .mix-dot {
        width: 10px;
        height: 10px;
        border-radius: 999px;
        display: inline-block;
      }

      .viz-side {
        padding: 16px;
        display: grid;
        gap: 14px;
        align-content: start;
      }
      .side-title {
        margin: 0;
        font-size: 16px;
        line-height: 1.1;
        letter-spacing: -0.02em;
      }
      .side-copy {
        margin: 0;
        font-size: 14px;
        color: var(--text-soft);
      }
      .bottleneck-list,
      .why-list,
      .snapshot-note-list {
        margin: 0;
        padding-left: 18px;
        display: grid;
        gap: 8px;
        font-size: 13px;
        color: var(--text-soft);
      }
      .confidence-box {
        border: 1px solid var(--border);
        border-radius: 14px;
        padding: 14px;
        background: var(--surface);
        display: grid;
        gap: 8px;
      }
      .confidence-head {
        display: flex;
        justify-content: space-between;
        gap: 10px;
        align-items: center;
      }
      .confidence-track {
        height: 10px;
        border-radius: 999px;
        overflow: hidden;
        background: #eef2f7;
        border: 1px solid #e7eaf3;
      }
      .confidence-fill {
        width: var(--w, 0%);
        height: 100%;
        border-radius: inherit;
        background: linear-gradient(90deg, rgba(4,120,87,.5), rgba(4,120,87,.9));
      }

      .why-layout {
        display: grid;
        grid-template-columns: minmax(0, 1.18fr) minmax(300px, .82fr);
        gap: 16px;
      }
      .why-panel {
        padding: 16px;
        display: grid;
        gap: 14px;
      }
      .route-svg-wrap {
        border: 1px dashed rgba(111,99,194,.24);
        border-radius: 14px;
        padding: 12px;
        background: linear-gradient(180deg, rgba(250,250,250,.82), rgba(255,255,255,.98));
      }
      svg.route-svg {
        width: 100%;
        height: 260px;
        display: block;
      }
      .route-svg circle {
        fill: rgba(111,99,194,0.2);
        stroke: rgba(93,82,183,0.82);
        stroke-width: 2;
      }
      .route-svg circle:first-child,
      .route-svg circle:last-child {
        fill: #111827;
        stroke: #111827;
      }
      .route-svg path {
        fill: none;
        stroke-linecap: round;
        stroke: rgba(111,99,194,.85);
        stroke-width: 8;
        transition: opacity .2s ease;
      }
      .route-svg .path--alt { stroke: rgba(111,99,194,.48); }
      .route-svg .path--tail {
        stroke: rgba(180,83,9,.72);
        stroke-dasharray: 7 7;
      }

      .route-caption {
        display: flex;
        justify-content: space-between;
        gap: 12px;
        flex-wrap: wrap;
        font-size: 12px;
        color: var(--text-soft);
        margin-top: 10px;
      }
      .bottleneck-map {
        display: grid;
        gap: 10px;
      }
      .bottleneck-row {
        display: grid;
        gap: 6px;
      }
      .bottleneck-head {
        display: flex;
        justify-content: space-between;
        gap: 12px;
        font-size: 13px;
      }
      .bottleneck-head strong { font-size: 13px; }
      .bar {
        position: relative;
        height: 10px;
        border-radius: 999px;
        background: #eef2f7;
        border: 1px solid #e7eaf3;
        overflow: hidden;
      }
      .bar > span {
        display: block;
        height: 100%;
        border-radius: inherit;
        background: linear-gradient(90deg, rgba(111,99,194,.3), rgba(111,99,194,.82));
        width: var(--w, 40%);
      }
      .bar > span.warn {
        background: linear-gradient(90deg, rgba(180,83,9,.28), rgba(180,83,9,.82));
      }
      .bar > span.danger {
        background: linear-gradient(90deg, rgba(185,28,28,.28), rgba(185,28,28,.82));
      }

      .candidates-grid {
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 14px;
      }
      .candidate-card {
        padding: 16px;
        display: grid;
        gap: 10px;
      }
      .candidate-card.is-selected {
        border-color: rgba(111,99,194,.28);
        background: linear-gradient(180deg, rgba(111,99,194,.05), rgba(255,255,255,.98));
      }
      .candidate-head {
        display: flex;
        justify-content: space-between;
        gap: 12px;
        align-items: center;
      }
      .candidate-title {
        margin: 0;
        font-size: 15px;
        line-height: 1.1;
        letter-spacing: -0.02em;
      }
      .candidate-grid {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 10px;
      }
      .route-label {
        font-size: 10px;
        letter-spacing: 0.08em;
        text-transform: uppercase;
        color: var(--text-faint);
        font-weight: 700;
      }
      .route-value {
        font-size: 14px;
        line-height: 1.2;
        font-weight: 700;
      }
      .route-subvalue {
        font-size: 12px;
        color: var(--text-soft);
      }
      .route-track {
        height: 8px;
        border-radius: 999px;
        overflow: hidden;
        background: #eef2f7;
        border: 1px solid #e7eaf3;
      }
      .route-track > span {
        display: block;
        height: 100%;
        border-radius: inherit;
        background: linear-gradient(90deg, rgba(111,99,194,.26), rgba(111,99,194,.85));
        width: var(--w, 50%);
      }

      .snapshot-grid {
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 14px;
      }
      .snapshot-strip {
        padding: 16px;
        display: grid;
        gap: 10px;
      }
      .snapshot-title {
        margin: 0;
        font-size: 15px;
        line-height: 1.1;
        letter-spacing: -0.02em;
      }
      .sparkline {
        width: 100%;
        height: 82px;
        display: block;
      }
      .snapshot-footer {
        display: flex;
        justify-content: space-between;
        gap: 12px;
        flex-wrap: wrap;
        font-size: 12px;
        color: var(--text-soft);
      }

      .snapshot-notes-grid {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 14px;
      }
      .snapshot-note-card {
        padding: 16px;
        display: grid;
        gap: 10px;
      }

      .debug-card details { display: grid; gap: 12px; }
      .debug-card summary {
        cursor: pointer;
        font-weight: 700;
        color: var(--text);
      }
      .debug-buttons {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
      }
      .debug-status {
        margin: 0;
        font-size: 13px;
        color: var(--text-soft);
      }
      .debug-status.mono { font-family: var(--mono); }

      .footer {
        border-top: 1px solid var(--border);
        padding-top: 16px;
        color: var(--text-soft);
        font-size: 12px;
        display: flex;
        justify-content: space-between;
        gap: 12px;
        flex-wrap: wrap;
      }

      [data-mode-only="explain"] { display: block; }
      body.is-quick [data-mode-only="explain"] { display: none; }
      body.is-quick .mode-chip[data-mode="quick"],
      body.is-explain .mode-chip[data-mode="explain"] { 
        background: var(--primary-soft);
        border-color: rgba(111, 99, 194, 0.24);
        color: var(--primary-strong);
      }
      body.is-quick .mode-chip[data-mode="explain"],
      body.is-explain .mode-chip[data-mode="quick"] {
        background: var(--surface-soft);
        color: var(--text);
      }

      @media (max-width: 1199px) {
        .controls-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
        .signal-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
        .metrics-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
        .mainviz-layout,
        .why-layout,
        .candidates-grid,
        .snapshot-grid,
        .snapshot-notes-grid { grid-template-columns: 1fr; }
      }

      @media (max-width: 899px) {
        .app { padding: 20px 16px 48px; }
        .app__title { white-space: normal; }
        .controls-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
        .metrics-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
        .signal-grid { grid-template-columns: 1fr; }
      }

      @media (max-width: 639px) {
        .controls-grid,
        .metrics-grid { grid-template-columns: 1fr; }
        .global-nav { gap: 12px; }
        .depth-row { grid-template-columns: 1fr; gap: 6px; }
        .depth-value { text-align: left; }
        .candidate-grid,
        .snapshot-notes-grid { grid-template-columns: 1fr; }
        .footer { flex-direction: column; }
      }