.body-fat-goal-app {
      --space-xs: 4px;
      --space-sm: 8px;
      --space-md: 12px;
      --space-lg: 16px;
      --space-xl: 24px;
      --space-2xl: 32px;
      --space-3xl: 48px;
      --gray-50: #fbfbfb;
      --gray-100: #f7f7f7;
      --gray-150: #f2f2f2;
      --gray-200: #eeeeee;
      --gray-300: #dddddd;
      --gray-400: #bbbbbb;
      --gray-500: #999999;
      --gray-600: #666666;
      --gray-700: #444444;
      --gray-800: #222222;
      --gray-900: #111111;
      --bg-canvas: #ffffff;
      --bg-module: #f7f7f7;
      --bg-hover: #eeeeee;
      --bg-hover-subtle: #f2f2f2;
      --bg-active: #111111;
      --bg-disabled: #eeeeee;
      --text-primary: #111111;
      --text-secondary: #444444;
      --text-tertiary: #666666;
      --text-placeholder: #999999;
      --text-disabled: #999999;
      --text-on-dark: #ffffff;
      --text-on-dark-secondary: rgba(255, 255, 255, 0.72);
      --border: #dddddd;
      --border-strong: #222222;
      --success: #276749;
      --danger: #a12424;
      --warning: #7a4b00;
      --radius-sm: 4px;
      --radius: 6px;
      --radius-round: 999px;
      --font-sans: "Noto Sans SC", system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
      box-sizing: border-box;
      width: 100%;
      margin: 0;
      padding: 0 360px 48px 30px;
      background: var(--bg-canvas);
      color: var(--text-primary);
      font-family: var(--font-sans);
      font-size: 15px;
      line-height: 1.7;
    }

    .body-fat-goal-app,
    .body-fat-goal-app *,
    .body-fat-goal-app *::before,
    .body-fat-goal-app *::after {
      box-sizing: border-box;
    }

    .body-fat-goal-app button,
    .body-fat-goal-app input {
      font: inherit;
    }

    .body-fat-goal-app [hidden] {
      display: none !important;
    }

    .body-fat-goal-app :focus-visible {
      outline: 2px solid var(--border-strong);
      outline-offset: 2px;
    }

    .body-fat-goal-app a {
      color: var(--text-primary);
      text-decoration-thickness: 1px;
      text-underline-offset: 3px;
    }

    .body-fat-goal-app a:hover {
      text-decoration-thickness: 2px;
    }

    .body-fat-goal-app .tool-page-header {
      padding: 24px 0 16px;
      border-bottom: 1px solid var(--border);
    }

    .body-fat-goal-app h1 {
      margin: 0;
      font-size: 30px;
      line-height: 1.2;
      letter-spacing: -0.5px;
      font-weight: 800;
    }

    .body-fat-goal-app .page-description {
      max-width: 72ch;
      margin: 4px 0 0;
      color: var(--text-tertiary);
    }

    .body-fat-goal-app h2 {
      margin: 32px 0 16px;
      padding-left: 12px;
      border-left: 3px solid var(--gray-900);
      font-size: 24px;
      line-height: 1.3;
      font-weight: 700;
    }

    .body-fat-goal-app h3 {
      margin: 0;
      font-size: 18px;
      line-height: 1.4;
      font-weight: 700;
    }

    .body-fat-goal-app p {
      margin: 0;
    }

    .body-fat-goal-app .tool-core {
      padding-top: 16px;
    }

    .body-fat-goal-app .workspace-card,
    .body-fat-goal-app .card-block {
      margin: 0 0 16px;
      padding: 16px 24px;
      background: var(--bg-module);
      border: 1px solid var(--border);
      border-radius: var(--radius);
    }

    .body-fat-goal-app .workspace-grid {
      display: grid;
      grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
      gap: 16px;
      align-items: start;
    }

    .body-fat-goal-app .panel {
      min-width: 0;
      padding: 16px;
      background: var(--bg-canvas);
      border: 1px solid var(--border);
      border-radius: var(--radius);
    }

    .body-fat-goal-app .panel-title-row {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 8px;
      margin-bottom: 16px;
    }

    .body-fat-goal-app .panel-title {
      margin: 0;
      padding: 0;
      border: 0;
      font-size: 18px;
      font-weight: 700;
      line-height: 1.4;
    }

    .body-fat-goal-app .segment {
      display: grid;
      grid-template-columns: repeat(2, minmax(54px, 1fr));
      padding: 2px;
      background: var(--gray-100);
      border: 1px solid var(--border);
      border-radius: var(--radius);
    }

    .body-fat-goal-app .segment button {
      min-height: 38px;
      padding: 0 12px;
      background: transparent;
      color: var(--text-secondary);
      border: 0;
      border-radius: var(--radius-sm);
      cursor: pointer;
      font-weight: 700;
    }

    .body-fat-goal-app .segment button[aria-pressed="true"] {
      background: var(--bg-active);
      color: var(--text-on-dark);
    }

    .body-fat-goal-app .form-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 12px;
    }

    .body-fat-goal-app .field {
      min-width: 0;
    }

    .body-fat-goal-app .field label {
      display: block;
      margin-bottom: 4px;
      color: var(--text-secondary);
      font-size: 13px;
      font-weight: 700;
    }

    .body-fat-goal-app .field-help {
      min-height: 20px;
      margin-top: 4px;
      color: var(--text-tertiary);
      font-size: 12px;
      line-height: 1.5;
    }

    .body-fat-goal-app .field-error {
      min-height: 20px;
      margin-top: 4px;
      color: var(--danger);
      font-size: 12px;
      line-height: 1.5;
    }

    .body-fat-goal-app .input-wrap {
      position: relative;
    }

    .body-fat-goal-app .input-base {
      width: 100%;
      height: 44px;
      padding: 0 58px 0 12px;
      color: var(--text-primary);
      background: var(--bg-canvas);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      font-variant-numeric: tabular-nums;
    }

    .body-fat-goal-app .input-base:hover {
      border-color: var(--gray-400);
    }

    .body-fat-goal-app .input-base:focus {
      border-color: var(--border-strong);
    }

    .body-fat-goal-app .input-base[aria-invalid="true"] {
      border-color: var(--danger);
    }

    .body-fat-goal-app .unit-suffix {
      position: absolute;
      top: 50%;
      right: 12px;
      transform: translateY(-50%);
      color: var(--text-tertiary);
      pointer-events: none;
    }

    .body-fat-goal-app .preset-row,
    .body-fat-goal-app .actions {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .body-fat-goal-app .preset-row {
      margin-top: 12px;
    }

    .body-fat-goal-app .actions {
      margin-top: 16px;
    }

    .body-fat-goal-app .btn,
    .body-fat-goal-app .chip {
      min-height: 44px;
      padding: 0 16px;
      color: var(--text-primary);
      background: var(--bg-canvas);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      cursor: pointer;
      font-size: 14px;
      font-weight: 700;
    }

    .body-fat-goal-app .chip {
      min-height: 36px;
      padding: 0 12px;
      border-radius: var(--radius-round);
      font-size: 13px;
    }

    .body-fat-goal-app .btn:hover,
    .body-fat-goal-app .chip:hover {
      background: var(--bg-hover);
      border-color: var(--gray-400);
    }

    .body-fat-goal-app .btn:active,
    .body-fat-goal-app .chip:active {
      transform: translateY(1px);
    }

    .body-fat-goal-app .btn-primary {
      color: var(--text-on-dark);
      background: var(--bg-active);
      border-color: var(--bg-active);
    }

    .body-fat-goal-app .btn-primary:hover {
      background: var(--gray-800);
    }

    .body-fat-goal-app .status-line {
      min-height: 24px;
      margin-top: 10px;
      color: var(--text-tertiary);
      font-size: 13px;
    }

    .body-fat-goal-app .status-line.is-error {
      color: var(--danger);
    }

    .body-fat-goal-app .status-line.is-success {
      color: var(--success);
    }

    .body-fat-goal-app .result-strong {
      padding: 24px;
      color: var(--text-on-dark);
      background: var(--gray-900);
      border-radius: var(--radius);
    }

    .body-fat-goal-app .result-kicker {
      color: var(--text-on-dark-secondary);
      font-size: 13px;
      font-weight: 700;
    }

    .body-fat-goal-app .result-value {
      margin-top: 4px;
      font-size: clamp(32px, 5vw, 52px);
      line-height: 1.15;
      font-weight: 800;
      font-variant-numeric: tabular-nums;
      overflow-wrap: anywhere;
    }

    .body-fat-goal-app .result-secondary {
      margin-top: 6px;
      color: var(--text-on-dark-secondary);
    }

    .body-fat-goal-app .result-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 8px;
      margin-top: 12px;
    }

    .body-fat-goal-app .metric {
      min-width: 0;
      padding: 12px;
      background: var(--gray-50);
      border: 1px solid var(--border);
      border-radius: var(--radius);
    }

    .body-fat-goal-app .metric dt {
      color: var(--text-tertiary);
      font-size: 12px;
      font-weight: 700;
    }

    .body-fat-goal-app .metric dd {
      margin: 4px 0 0;
      font-size: 20px;
      line-height: 1.3;
      font-weight: 800;
      font-variant-numeric: tabular-nums;
      overflow-wrap: anywhere;
    }

    .body-fat-goal-app .confidence-row {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 8px;
      margin-top: 12px;
    }

    .body-fat-goal-app .tag {
      display: inline-flex;
      align-items: center;
      min-height: 30px;
      padding: 2px 10px;
      border: 1px solid var(--border);
      border-radius: var(--radius-round);
      background: var(--gray-100);
      font-size: 12px;
      font-weight: 700;
    }

    .body-fat-goal-app .tag.warning {
      color: var(--warning);
      border-color: #c9a873;
      background: #fffaf0;
    }

    .body-fat-goal-app .range-card {
      margin-top: 12px;
      padding: 14px;
      background: var(--bg-canvas);
      border: 1px solid var(--border);
      border-radius: var(--radius);
    }

    .body-fat-goal-app .range-head {
      display: flex;
      flex-wrap: wrap;
      align-items: baseline;
      justify-content: space-between;
      gap: 8px;
    }

    .body-fat-goal-app .range-value {
      font-size: 20px;
      font-weight: 800;
      font-variant-numeric: tabular-nums;
    }

    .body-fat-goal-app .range-track {
      position: relative;
      height: 8px;
      margin: 14px 4px 6px;
      background: var(--gray-200);
      border-radius: var(--radius-round);
    }

    .body-fat-goal-app .range-track::before {
      content: "";
      position: absolute;
      inset: 0 24% 0 0;
      background: var(--gray-900);
      border-radius: var(--radius-round);
    }

    .body-fat-goal-app .range-labels {
      display: flex;
      justify-content: space-between;
      color: var(--text-tertiary);
      font-size: 12px;
    }

    .body-fat-goal-app .empty-state {
      min-height: 344px;
      display: grid;
      place-items: center;
      padding: 24px;
      color: var(--text-tertiary);
      text-align: center;
      background: var(--gray-50);
      border: 1px dashed var(--gray-400);
      border-radius: var(--radius);
    }

    .body-fat-goal-app .interpret-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 12px;
    }

    .body-fat-goal-app .interpret-item {
      padding: 16px;
      background: var(--bg-canvas);
      border: 1px solid var(--border);
      border-radius: var(--radius);
    }

    .body-fat-goal-app .interpret-item strong {
      display: block;
      margin-bottom: 4px;
      font-size: 16px;
    }

    .body-fat-goal-app details.acc {
      background: var(--bg-canvas);
      border-bottom: 1px solid var(--border);
    }

    .body-fat-goal-app details.acc:last-child {
      border-bottom: 0;
    }

    .body-fat-goal-app details.acc summary {
      min-height: 52px;
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 8px 4px;
      cursor: pointer;
      list-style: none;
      font-size: 16px;
      font-weight: 700;
    }

    .body-fat-goal-app details.acc summary::-webkit-details-marker {
      display: none;
    }

    .body-fat-goal-app details.acc summary::after {
      content: "+";
      margin-left: auto;
      color: var(--text-tertiary);
      font-size: 20px;
      font-weight: 400;
    }

    .body-fat-goal-app details.acc[open] summary::after {
      content: "−";
    }

    .body-fat-goal-app details.acc[open] > summary {
      margin-bottom: 12px;
      border-bottom: 1px solid var(--border);
    }

    .body-fat-goal-app .acc-panel {
      padding: 0 4px 16px;
    }

    .body-fat-goal-app .acc-panel > * + * {
      margin-top: 12px;
    }

    .body-fat-goal-app .formula {
      padding: 14px;
      overflow-x: auto;
      background: var(--gray-50);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      font-variant-numeric: tabular-nums;
      white-space: nowrap;
    }

    .body-fat-goal-app ul,
    .body-fat-goal-app ol {
      margin: 0;
      padding-left: 22px;
    }

    .body-fat-goal-app .table-wrap {
      overflow-x: auto;
      -webkit-overflow-scrolling: touch;
      border: 1px solid var(--border);
      border-radius: var(--radius);
    }

    .body-fat-goal-app table {
      width: 100%;
      min-width: 620px;
      border-collapse: collapse;
    }

    .body-fat-goal-app th,
    .body-fat-goal-app td {
      padding: 11px 12px;
      border-bottom: 1px solid var(--border);
      text-align: left;
      vertical-align: top;
    }

    .body-fat-goal-app th {
      background: var(--gray-100);
      font-size: 13px;
    }

    .body-fat-goal-app tbody tr:nth-child(even) {
      background: var(--gray-50);
    }

    .body-fat-goal-app tbody tr:last-child td {
      border-bottom: 0;
    }

    .body-fat-goal-app .num {
      font-variant-numeric: tabular-nums;
      white-space: nowrap;
    }

    .body-fat-goal-app .notice {
      padding: 12px 14px;
      background: #fffaf0;
      border: 1px solid #c9a873;
      border-radius: var(--radius);
      color: #5b3a00;
    }

    .body-fat-goal-app .related-links {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 8px;
    }

    .body-fat-goal-app .related-links a {
      display: block;
      padding: 12px 14px;
      background: var(--gray-50);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      text-decoration: none;
      font-weight: 700;
    }

    .body-fat-goal-app .related-links a:hover {
      background: var(--bg-hover);
    }

    .body-fat-goal-app .toast {
      position: fixed;
      z-index: 999;
      left: 50%;
      bottom: max(16px, env(safe-area-inset-bottom));
      max-width: calc(100vw - 24px);
      padding: 10px 14px;
      color: var(--text-on-dark);
      background: var(--gray-900);
      border-radius: var(--radius);
      transform: translateX(-50%);
      opacity: 1;
      transition: opacity 160ms ease;
      cursor: pointer;
    }

    .body-fat-goal-app .toast[hidden] {
      display: none;
    }

    @media (max-width: 900px) {
      .body-fat-goal-app {
        padding-right: 8px;
        padding-left: 8px;
      }
    }

    @media (max-width: 720px) {
      .body-fat-goal-app .workspace-grid,
      .body-fat-goal-app .form-grid,
      .body-fat-goal-app .result-grid,
      .body-fat-goal-app .interpret-grid,
      .body-fat-goal-app .related-links {
        grid-template-columns: 1fr;
        gap: 8px;
      }

      .body-fat-goal-app .workspace-card,
      .body-fat-goal-app .card-block {
        padding: 14px;
      }

      .body-fat-goal-app .result-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
      }
    }

    @media (max-width: 430px) {
      .body-fat-goal-app .actions {
        display: grid;
        grid-template-columns: 1fr;
      }

      .body-fat-goal-app .btn {
        width: 100%;
      }

      .body-fat-goal-app .result-grid {
        grid-template-columns: 1fr;
      }

      .body-fat-goal-app .panel-title-row {
        align-items: stretch;
      }

      .body-fat-goal-app .segment {
        width: 100%;
      }
    }

    @media (hover: none) {
      .body-fat-goal-app .btn:active,
      .body-fat-goal-app .chip:active {
        transform: none;
        background: var(--bg-hover);
      }
    }

    @media (prefers-reduced-motion: reduce) {
      .body-fat-goal-app,
      .body-fat-goal-app *,
      .body-fat-goal-app *::before,
      .body-fat-goal-app *::after {
        scroll-behavior: auto !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
      }
    }