:root {
      color-scheme: dark;
      --bg: #07090d;
      --panel: #10141b;
      --panel-2: #151a23;
      --ink: #f5f7fb;
      --muted: #9aa4b2;
      --line: #293241;
      --soft: #1b2230;
      --accent: #7dd3fc;
      --accent-2: #5eead4;
      --danger: #f05252;
      --warn: #d6a93a;
      --good: #2fb37c;
      --scale-low: #08205f;
      --scale-mid: #1e6fb8;
      --scale-high: #7dd3fc;
      --shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
    }
    html[data-theme="light"] {
      color-scheme: light;
      --bg: #f5f7fb;
      --panel: #ffffff;
      --panel-2: #f9fbff;
      --ink: #121826;
      --muted: #667085;
      --line: #d8deea;
      --soft: #edf1f7;
      --accent: #155eef;
      --accent-2: #0f766e;
      --danger: #b42318;
      --warn: #a15c07;
      --good: #067647;
      --scale-low: #dce8ff;
      --scale-mid: #5d9cec;
      --scale-high: #155eef;
      --shadow: 0 18px 42px rgba(16, 24, 40, 0.10);
    }
    * { box-sizing: border-box; }
    body {
      margin: 0;
      background:
        linear-gradient(180deg, rgba(125, 211, 252, 0.08), transparent 330px),
        var(--bg);
      color: var(--ink);
      font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    }
    header {
      position: sticky;
      top: 0;
      z-index: 10;
      background: color-mix(in srgb, var(--panel) 88%, transparent);
      border-bottom: 1px solid var(--line);
      backdrop-filter: blur(18px);
    }
    .topbar, main {
      width: min(1440px, 100%);
      margin: 0 auto;
    }
    .topbar {
      min-height: 78px;
      padding: 14px 24px;
      display: grid;
      grid-template-columns: minmax(280px, 1fr) auto;
      gap: 18px;
      align-items: center;
    }
    .brand {
      display: flex;
      align-items: center;
      gap: 18px;
      min-width: 0;
    }
    .brand img {
      width: min(270px, 40vw);
      max-height: 42px;
      object-fit: contain;
      object-position: left center;
    }
    html[data-theme="dark"] .logo-light { display: none; }
    html[data-theme="light"] .logo-dark { display: none; }
    .title-block {
      min-width: 0;
      border-left: 1px solid var(--line);
      padding-left: 18px;
    }
    h1 {
      margin: 0;
      font-size: 18px;
      line-height: 1.2;
      letter-spacing: 0;
      font-weight: 700;
    }
    .subtitle {
      margin-top: 4px;
      color: var(--muted);
      font-size: 12px;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }
    .controls {
      display: flex;
      gap: 10px;
      align-items: center;
      justify-content: flex-end;
      flex-wrap: wrap;
    }
    .control, .btn, .file-btn {
      min-height: 38px;
      border: 1px solid var(--line);
      background: var(--panel-2);
      color: var(--ink);
      border-radius: 8px;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 0 12px;
      font: inherit;
      font-size: 13px;
      cursor: pointer;
    }
    .theme-toggle {
      width: 38px;
      justify-content: center;
      padding: 0;
      font-size: 18px;
      line-height: 1;
    }
    .control label {
      color: var(--muted);
      font-size: 12px;
      white-space: nowrap;
    }
    button, select, input {
      font: inherit;
      color: var(--ink);
    }
    button {
      border: 0;
      background: transparent;
      cursor: pointer;
    }
    .btn:hover, .file-btn:hover, .control:hover, .icon-btn:hover, .info-btn:hover {
      border-color: color-mix(in srgb, var(--accent) 60%, var(--line));
      box-shadow: 0 0 0 1px color-mix(in srgb, var(--accent) 16%, transparent);
    }
    .btn:focus-visible, .file-btn:focus-visible, select:focus-visible, input:focus-visible, .icon-btn:focus-visible, .info-btn:focus-visible {
      outline: 2px solid var(--accent);
      outline-offset: 2px;
    }
    select, input[type="text"], input[type="url"], input[type="number"] {
      border: 1px solid var(--line);
      background: var(--panel);
      min-height: 34px;
      border-radius: 7px;
      padding: 0 10px;
    }
    select {
      min-width: 120px;
      background: var(--panel);
      font-weight: 650;
    }
    input[type="file"] {
      position: absolute;
      inline-size: 1px;
      block-size: 1px;
      overflow: hidden;
      clip: rect(0 0 0 0);
      clip-path: inset(50%);
      white-space: nowrap;
    }
    main {
      padding: 18px 24px 28px;
    }
    .metrics {
      display: grid;
      grid-template-columns: repeat(6, minmax(0, 1fr));
      gap: 12px;
    }
    .metric, .panel {
      border: 1px solid var(--line);
      background: color-mix(in srgb, var(--panel) 94%, transparent);
      box-shadow: var(--shadow);
    }
    .metric {
      min-height: 96px;
      border-radius: 8px;
      padding: 13px 14px;
      display: grid;
      align-content: space-between;
    }
    .metric-head, .panel-head {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 10px;
    }
    .metric-head span {
      color: var(--muted);
      font-size: 12px;
      font-weight: 600;
    }
    .metric strong {
      font-size: 24px;
      line-height: 1;
      letter-spacing: 0;
      font-weight: 750;
    }
    .metric small {
      color: var(--muted);
      font-size: 11px;
    }
    .layout {
      display: grid;
      grid-template-columns: minmax(0, 1.65fr) minmax(360px, 0.9fr);
      gap: 16px;
      align-items: stretch;
      margin-top: 16px;
    }
    .split {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 16px;
      margin-top: 16px;
    }
    .stack {
      display: grid;
      gap: 16px;
      align-content: start;
    }
    .layout > .stack:first-child {
      align-content: stretch;
    }
    .layout > .stack:first-child .panel {
      min-height: auto;
      display: grid;
      grid-template-rows: auto minmax(0, 1fr);
    }
    .layout > .stack:first-child .panel-body {
      min-height: 0;
    }
    .layout > .stack:first-child .chart-wrap {
      height: clamp(420px, 54vh, 560px);
      min-height: 420px;
    }
    #fitPanel.fullscreen .panel-body {
      display: grid;
      grid-template-rows: minmax(0, 1fr) auto;
    }
    #fitPanel.fullscreen .chart-wrap {
      height: auto;
      min-height: 0;
    }
    .panel {
      border-radius: 8px;
      overflow: hidden;
    }
    .panel.fullscreen {
      position: fixed;
      inset: 18px;
      z-index: 40;
      display: grid;
      grid-template-rows: auto minmax(0, 1fr);
    }
    .panel.fullscreen .panel-body {
      min-height: 0;
      overflow: auto;
    }
    .panel.fullscreen .table-wrap {
      max-height: none;
      height: 100%;
    }
    .panel-head {
      min-height: 48px;
      padding: 10px 14px;
      border-bottom: 1px solid var(--line);
      background: var(--panel-2);
    }
    h2 {
      margin: 0;
      font-size: 15px;
      letter-spacing: 0;
      font-weight: 700;
    }
    .panel-tools {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      flex-wrap: wrap;
      justify-content: flex-end;
    }
    .forecast-control {
      min-height: 28px;
      display: inline-flex;
      align-items: center;
      gap: 7px;
      border: 1px solid var(--line);
      border-radius: 8px;
      background: var(--panel);
      padding: 0 8px;
      color: var(--muted);
      font-size: 12px;
      font-weight: 650;
    }
    .forecast-control input {
      width: 54px;
      min-height: 22px;
      border: 0;
      background: transparent;
      color: var(--ink);
      padding: 0;
      text-align: right;
      font-weight: 750;
    }
    .icon-btn, .info-btn {
      width: 24px;
      height: 24px;
      border: 1px solid var(--line);
      border-radius: 8px;
      background: color-mix(in srgb, var(--panel-2) 82%, var(--bg));
      color: var(--muted);
      display: inline-grid;
      place-items: center;
      font-size: 12px;
      font-weight: 700;
      line-height: 1;
      padding: 0;
      position: relative;
      box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03);
    }
    .info-btn {
      width: 22px;
      height: 22px;
      border-radius: 50%;
      font-size: 12px;
      font-family: Georgia, "Times New Roman", serif;
      font-style: italic;
      font-weight: 700;
    }
    .icon-btn[data-fullscreen] {
      color: transparent;
      font-size: 0;
    }
    .icon-btn[data-fullscreen]::before {
      content: "";
      width: 12px;
      height: 12px;
      background:
        linear-gradient(var(--muted), var(--muted)) left top / 5px 1.5px no-repeat,
        linear-gradient(var(--muted), var(--muted)) left top / 1.5px 5px no-repeat,
        linear-gradient(var(--muted), var(--muted)) right top / 5px 1.5px no-repeat,
        linear-gradient(var(--muted), var(--muted)) right top / 1.5px 5px no-repeat,
        linear-gradient(var(--muted), var(--muted)) left bottom / 5px 1.5px no-repeat,
        linear-gradient(var(--muted), var(--muted)) left bottom / 1.5px 5px no-repeat,
        linear-gradient(var(--muted), var(--muted)) right bottom / 5px 1.5px no-repeat,
        linear-gradient(var(--muted), var(--muted)) right bottom / 1.5px 5px no-repeat;
      opacity: 0.9;
    }
    .panel-body {
      padding: 14px;
    }
    .chart-wrap {
      position: relative;
      height: 360px;
      min-height: 260px;
    }
    .chart-wrap.compact { height: 285px; }
    .range-controls {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 26px;
      margin: 36px auto 0;
      border-top: 1px solid var(--line);
      padding-top: 18px;
      width: min(860px, 100%);
    }
    .range-control {
      display: grid;
      gap: 6px;
      min-width: 0;
    }
    .range-control label {
      color: var(--muted);
      font-size: 11px;
      font-weight: 750;
      text-transform: uppercase;
    }
    .range-control .range-row {
      display: grid;
      grid-template-columns: minmax(0, 1fr) 74px;
      gap: 10px;
      align-items: center;
    }
    .range-control output {
      color: var(--ink);
      font-size: 12px;
      font-variant-numeric: tabular-nums;
      text-align: right;
    }
    .fit-formula {
      display: grid;
      grid-template-columns: minmax(0, 1.2fr) minmax(220px, 0.8fr);
      gap: 12px;
      margin: 20px auto 10px;
      width: min(860px, 100%);
    }
    .formula-card {
      border: 1px solid var(--line);
      border-radius: 8px;
      background:
        linear-gradient(180deg, color-mix(in srgb, var(--panel-2) 88%, #1d2d3d), color-mix(in srgb, var(--panel) 92%, #122033));
      padding: 14px;
      overflow: hidden;
      box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.025);
    }
    .formula-card span {
      display: block;
      color: #9fc5ea;
      font-size: 11px;
      font-weight: 750;
      text-transform: uppercase;
      letter-spacing: 0;
      margin-bottom: 8px;
    }
    .formula-card small {
      color: var(--muted);
      font-size: 11px;
      line-height: 1.3;
    }
    .fit-math {
      display: block;
      width: 100%;
      max-height: 190px;
      object-fit: contain;
      object-position: left center;
      border: 1px solid var(--line);
      border-radius: 8px;
      background: var(--panel);
      padding: 8px;
    }
    .fit-latex {
      margin-top: 10px;
      color: var(--muted);
      font-family: "Cascadia Code", Consolas, monospace;
      font-size: 11px;
      line-height: 1.5;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }
    .fit-term-list {
      display: grid;
      gap: 7px;
      max-height: 128px;
      overflow: auto;
    }
    .fit-term {
      display: grid;
      grid-template-columns: 62px minmax(0, 1fr);
      gap: 8px;
      align-items: center;
      border: 1px solid var(--line);
      border-radius: 7px;
      padding: 7px 8px;
      background: color-mix(in srgb, var(--panel) 84%, var(--bg));
      font-size: 12px;
    }
    .fit-term strong {
      color: var(--ink);
      font-variant-numeric: tabular-nums;
    }
    .fit-term code {
      color: var(--accent-2);
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }
    canvas {
      display: block;
      width: 100%;
      height: 100%;
    }
    .grid-form {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 12px;
      align-items: end;
    }
    .field {
      display: grid;
      gap: 6px;
      min-width: 0;
    }
    .field label, .section-label {
      color: var(--muted);
      font-size: 12px;
      font-weight: 650;
    }
    .api-row {
      display: grid;
      grid-template-columns: minmax(0, 1fr) auto;
      gap: 8px;
      margin-top: 12px;
    }
    .variables {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 8px;
      margin-top: 10px;
      max-height: 172px;
      overflow: auto;
      padding-right: 4px;
    }
    .check {
      display: flex;
      align-items: center;
      gap: 8px;
      min-height: 32px;
      border: 1px solid var(--line);
      background: var(--panel);
      border-radius: 7px;
      padding: 0 9px;
      color: var(--ink);
      font-size: 12px;
    }
    .check input { accent-color: var(--accent); }
    .formula {
      min-height: 74px;
      border: 1px solid var(--line);
      background: #090d13;
      border-radius: 8px;
      padding: 14px;
      color: var(--accent);
      overflow: auto;
      font-family: "Cascadia Code", Consolas, monospace;
      font-size: 14px;
      line-height: 1.6;
      white-space: nowrap;
    }
    .formula-image {
      display: block;
      width: 100%;
      max-height: 168px;
      object-fit: contain;
      object-position: left center;
      margin-top: 10px;
      border: 1px solid var(--line);
      border-radius: 8px;
      background: var(--panel);
      padding: 10px;
    }
    html[data-theme="light"] .formula {
      background: #f3f7ff;
    }
    .terms {
      display: grid;
      gap: 8px;
      margin-top: 12px;
      max-height: 210px;
      overflow: auto;
    }
    .term {
      display: grid;
      grid-template-columns: 70px minmax(0, 1fr) 72px;
      gap: 8px;
      align-items: center;
      border: 1px solid var(--line);
      background: var(--panel);
      border-radius: 7px;
      padding: 8px;
      font-size: 12px;
    }
    .term code {
      color: var(--accent-2);
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }
    .term span {
      color: var(--muted);
      text-align: right;
    }
    .scenario-list {
      display: grid;
      gap: 12px;
      max-height: 420px;
      overflow: auto;
      padding-right: 4px;
    }
    .slider-row {
      display: grid;
      grid-template-columns: 92px minmax(120px, 1fr) 94px;
      gap: 10px;
      align-items: center;
      font-size: 12px;
    }
    .slider-row label {
      color: var(--muted);
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }
    input[type="range"] {
      width: 100%;
      accent-color: var(--accent);
    }
    .scenario-slider {
      --slider-color: var(--accent);
      --slider-pct: 50%;
      height: 18px;
      appearance: none;
      background: transparent;
      cursor: pointer;
    }
    .scenario-slider::-webkit-slider-runnable-track {
      height: 7px;
      border: 1px solid color-mix(in srgb, var(--slider-color) 42%, var(--line));
      border-radius: 999px;
      background:
        linear-gradient(90deg, var(--slider-color) 0 var(--slider-pct), color-mix(in srgb, var(--panel) 82%, white) var(--slider-pct) 100%);
      box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
    }
    .scenario-slider::-webkit-slider-thumb {
      appearance: none;
      width: 16px;
      height: 16px;
      border-radius: 50%;
      margin-top: -5px;
      border: 2px solid color-mix(in srgb, var(--slider-color) 74%, white);
      background: var(--slider-color);
      box-shadow: 0 0 0 3px color-mix(in srgb, var(--slider-color) 18%, transparent), 0 3px 12px rgba(0, 0, 0, 0.35);
    }
    .scenario-slider::-moz-range-track {
      height: 7px;
      border: 1px solid color-mix(in srgb, var(--slider-color) 42%, var(--line));
      border-radius: 999px;
      background:
        linear-gradient(90deg, var(--slider-color) 0 var(--slider-pct), color-mix(in srgb, var(--panel) 82%, white) var(--slider-pct) 100%);
    }
    .scenario-slider::-moz-range-thumb {
      width: 16px;
      height: 16px;
      border-radius: 50%;
      border: 2px solid color-mix(in srgb, var(--slider-color) 74%, white);
      background: var(--slider-color);
      box-shadow: 0 0 0 3px color-mix(in srgb, var(--slider-color) 18%, transparent), 0 3px 12px rgba(0, 0, 0, 0.35);
    }
    .scenario-value {
      min-height: 34px;
      display: inline-flex;
      align-items: center;
      justify-content: flex-end;
      border: 1px solid var(--line);
      background: var(--panel);
      border-radius: 7px;
      padding: 0 10px;
      color: var(--ink);
      font-variant-numeric: tabular-nums;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }
    .prediction {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 10px;
      margin-top: 14px;
    }
    .prediction .metric {
      min-height: 78px;
      box-shadow: none;
    }
    table {
      width: 100%;
      border-collapse: collapse;
      font-size: 12px;
    }
    th, td {
      border-bottom: 1px solid var(--line);
      padding: 8px 7px;
      text-align: right;
      white-space: nowrap;
    }
    th:first-child, td:first-child { text-align: left; }
    th {
      color: var(--muted);
      font-weight: 700;
      background: var(--panel-2);
      position: sticky;
      top: 0;
      z-index: 1;
    }
    .table-wrap {
      max-height: 318px;
      overflow: auto;
      border: 1px solid var(--line);
      border-radius: 8px;
    }
    .status {
      min-height: 30px;
      display: flex;
      align-items: center;
      color: var(--muted);
      font-size: 12px;
      margin-top: 10px;
    }
    .status strong { color: var(--ink); }
    .pill {
      display: inline-flex;
      align-items: center;
      min-height: 24px;
      border: 1px solid var(--line);
      border-radius: 999px;
      padding: 0 8px;
      background: var(--soft);
      color: var(--muted);
      font-size: 11px;
      font-weight: 650;
    }
    .tooltip {
      position: fixed;
      z-index: 60;
      pointer-events: none;
      border: 1px solid var(--line);
      background: var(--panel);
      color: var(--ink);
      box-shadow: var(--shadow);
      border-radius: 8px;
      padding: 8px 10px;
      font-size: 12px;
      max-width: 260px;
      display: none;
    }
    .modal-backdrop {
      position: fixed;
      inset: 0;
      background: rgba(0, 0, 0, 0.56);
      z-index: 80;
      display: none;
      align-items: center;
      justify-content: center;
      padding: 20px;
    }
    .modal {
      width: min(520px, 100%);
      border: 1px solid var(--line);
      background: var(--panel);
      border-radius: 8px;
      box-shadow: var(--shadow);
      overflow: hidden;
    }
    .modal.formula-modal {
      width: min(980px, calc(100vw - 36px));
      max-height: calc(100vh - 48px);
      display: grid;
      grid-template-rows: auto minmax(0, 1fr);
    }
    .modal.formula-modal .panel-body {
      overflow: auto;
    }
    .modal .panel-body {
      color: var(--muted);
      line-height: 1.55;
      font-size: 13px;
    }
    .palette {
      position: fixed;
      inset: 0;
      z-index: 70;
      display: none;
      align-items: flex-start;
      justify-content: center;
      padding-top: 96px;
      background: rgba(0, 0, 0, 0.38);
    }
    .palette-box {
      width: min(560px, calc(100% - 32px));
      border: 1px solid var(--line);
      background: var(--panel);
      border-radius: 8px;
      box-shadow: var(--shadow);
      overflow: hidden;
    }
    .palette-box input {
      width: 100%;
      height: 48px;
      border: 0;
      border-bottom: 1px solid var(--line);
      border-radius: 0;
      background: var(--panel-2);
    }
    .command {
      width: 100%;
      min-height: 42px;
      padding: 0 14px;
      border-bottom: 1px solid var(--line);
      color: var(--ink);
      text-align: left;
    }
    .command:hover, .command.active {
      background: var(--soft);
    }
    .empty {
      color: var(--muted);
      font-size: 12px;
      padding: 12px;
      border: 1px dashed var(--line);
      border-radius: 8px;
      background: var(--panel);
    }
    @media (max-width: 1180px) {
      .metrics { grid-template-columns: repeat(3, minmax(0, 1fr)); }
      .topbar { grid-template-columns: 1fr; }
      .controls { justify-content: flex-start; }
    }
    @media (max-width: 980px) {
      .layout, .split { grid-template-columns: 1fr; }
      .metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
      .grid-form, .variables { grid-template-columns: 1fr; }
      .slider-row { grid-template-columns: 1fr; }
      .layout > .stack:first-child .chart-wrap { min-height: 360px; }
      .fit-formula { grid-template-columns: 1fr; }
    }
    @media (max-width: 640px) {
      main, .topbar { padding-left: 14px; padding-right: 14px; }
      .brand { align-items: flex-start; flex-direction: column; gap: 10px; }
      .title-block { border-left: 0; padding-left: 0; }
      .metrics, .prediction { grid-template-columns: 1fr; }
      .fit-formula { grid-template-columns: 1fr; }
      .api-row { grid-template-columns: 1fr; }
      .chart-wrap { height: 300px; }
    }