html, body {
      height: 100%;
      margin: 0;
    }
    * {
      box-sizing: border-box;
    }
    :root {
      --bg: #f5ede3;
      --surface: #fff9f3;
      --text: #2c2416;
      --accent: #c97a3a;
      --secondary: #8b8075;
    }
    .app-wrap {
      font-family: 'DM Sans', sans-serif;
      height: 100%;
      overflow-y: auto;
      background: var(--bg);
      display: flex;
      align-items: flex-start;
      justify-content: center;
      padding: 2rem;
      gap: 4rem;
      position: relative;
      padding-top: 4rem;
    }
    .menu-container {
      position: fixed;
      left: 2rem;
      top: calc(2rem + 120px);
      background: none;
      border-radius: 0;
      padding: 0;
      width: auto;
      box-shadow: none;
      height: fit-content;
      flex-shrink: 0;
    }
    .menu-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text);
      margin: 0 0 1.5rem 0;
      text-align: center;
      display: none;
    }
    .menu-list {
      display: flex;
      flex-direction: column;
      gap: 0.75rem;
      min-width: 150px;
    }
    .menu-item {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      padding: 0.875rem 1rem;
      border: 2px solid var(--secondary);
      background: var(--bg);
      color: var(--text);
      border-radius: 0.75rem;
      font-family: 'DM Sans', sans-serif;
      font-size: 0.75rem;
      cursor: pointer;
      transition: all 0.2s;
      font-weight: 500;
      text-align: left;
    }
    .menu-item:hover {
      border-color: var(--accent);
      background: var(--surface);
    }
    .menu-item.active {
      background: var(--accent);
      color: var(--surface);
      border-color: var(--accent);
    }
    .menu-icon {
      font-size: 1.25rem;
      flex-shrink: 0;
    }
    .menu-text {
      flex: 1;
    }
    .calculator-container {
      background: var(--surface);
      border-radius: 1.5rem;
      padding: 2rem;
      max-width: 400px;
      width: 100%;
      box-shadow: 0 4px 12px rgba(44, 36, 22, 0.1);
    }
    @media (max-width: 768px) {
      .app-wrap {
        flex-direction: column;
        gap: 1rem;
      }
      .menu-container {
        width: 100%;
        position: static;
        transform: none;
      }
      .menu-list {
        flex-direction: row;
        flex-wrap: wrap;
      }
      .menu-item {
        flex: 1;
        min-width: 120px;
      }
    }
    .title {
      font-size: 1.75rem;
      font-weight: 700;
      color: var(--text);
      margin: 0 0 2rem 0;
      text-align: center;
    }
    .input-group {
      margin-bottom: 1.5rem;
    }
    .input-group label {
      display: block;
      font-size: 0.875rem;
      font-weight: 500;
      color: var(--secondary);
      margin-bottom: 0.5rem;
    }
    .input-group input {
      width: 100%;
      padding: 0.75rem 1rem;
      border: 2px solid var(--secondary);
      border-radius: 0.5rem;
      font-family: 'DM Sans', sans-serif;
      font-size: 1rem;
      color: var(--text);
      background: var(--bg);
      transition: border-color 0.2s;
    }
    .input-group input:focus {
      outline: none;
      border-color: var(--accent);
    }
    .unit-toggle {
      display: flex;
      gap: 0.5rem;
      margin-bottom: 1.5rem;
    }
    .unit-btn {
      flex: 1;
      padding: 0.75rem;
      border: 2px solid var(--secondary);
      background: var(--bg);
      color: var(--text);
      border-radius: 0.5rem;
      font-family: 'DM Sans', sans-serif;
      font-size: 0.875rem;
      cursor: pointer;
      transition: all 0.2s;
      font-weight: 500;
    }
    .unit-btn.active {
      background: var(--accent);
      color: var(--surface);
      border-color: var(--accent);
    }
    .calculate-btn {
      width: 100%;
      padding: 1rem;
      background: var(--accent);
      color: var(--surface);
      border: none;
      border-radius: 0.5rem;
      font-family: 'DM Sans', sans-serif;
      font-size: 1rem;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.2s;
      margin-bottom: 1.5rem;
    }
    .calculate-btn:hover {
      opacity: 0.9;
      transform: translateY(-2px);
    }
    .result-container {
      display: none;
      text-align: center;
      padding: 1.5rem;
      background: var(--bg);
      border-radius: 1rem;
      border: 2px solid var(--secondary);
    }
    .result-container.show {
      display: block;
      animation: slideIn 0.3s ease;
    }
    .error-message {
      font-size: 0.875rem;
      color: #e74c3c;
      font-weight: 600;
      padding: 0.75rem 1rem;
      background: var(--surface);
      border-radius: 0.5rem;
      border-left: 4px solid #e74c3c;
    }
    @keyframes slideIn {
      from {
        opacity: 0;
        transform: translateY(10px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }
    .result-label {
      font-size: 0.875rem;
      color: var(--secondary);
      margin-bottom: 0.5rem;
    }
    .result-value {
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--accent);
      font-family: 'Space Mono', monospace;
      margin-bottom: 1rem;
    }
    .result-category {
      font-size: 1rem;
      color: var(--text);
      font-weight: 600;
      padding: 0.75rem 1rem;
      background: var(--surface);
      border-radius: 0.5rem;
    }
    .category-underweight {
      color: #4a90e2;
    }
    .category-normal {
      color: #50c878;
    }
    .category-overweight {
      color: #ffa500;
    }
    .category-obese {
      color: #e74c3c;
    }
    .ad-block {
      background: var(--secondary);
      border-radius: 0.75rem;
      padding: 1rem;
      margin-bottom: 1.5rem;
      text-align: center;
      color: var(--surface);
      font-size: 0.75rem;
      min-height: 100px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 500;
    }
    .gender-toggle {
      display: flex;
      gap: 0.5rem;
      margin-bottom: 1.5rem;
    }
    .goal-toggle {
      display: grid;
      grid-template-columns: 1fr 1fr 1fr;
      gap: 0.5rem;
    }
    .result-content {
      display: none;
    }
    .result-content.show {
      display: block;
    }
    .result-box {
      background: var(--bg);
      padding: 1.5rem;
      border-radius: 1rem;
      text-align: center;
      margin-bottom: 1.5rem;
      border: 2px solid var(--secondary);
    }
    .result-box-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 0.75rem;
      background: var(--surface);
      border-radius: 0.5rem;
    }
    .result-box-row-label {
      font-size: 0.875rem;
      color: var(--text);
    }
    .result-box-row-value {
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--accent);
      font-family: 'Space Mono', monospace;
    }
    .macros-grid {
      display: grid;
      grid-template-columns: 1fr 1fr 1fr;
      gap: 0.75rem;
    }
    .macro-item {
      text-align: center;
    }
    .macro-label {
      font-size: 0.75rem;
      color: var(--secondary);
      margin-bottom: 0.25rem;
    }
    .macro-value {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--accent);
    }
    .meal-section {
      background: var(--bg);
      padding: 1.25rem;
      border-radius: 0.75rem;
      border: 2px solid var(--secondary);
    }
    .meal-section-title {
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--text);
      margin-bottom: 1rem;
    }
    .meal-grid {
      display: grid;
      gap: 0.75rem;
    }
    .color-underweight {
      color: #4a90e2;
    }
    .color-normal {
      color: #50c878;
    }
    .color-overweight {
      color: #ffa500;
    }
    .color-obese {
      color: #e74c3c;
    }
    .color-lose {
      color: #e74c3c;
    }
    .color-gain {
      color: #50c878;
    }
    .input-group select {
      width: 100%;
      padding: 0.75rem 1rem;
      border: 2px solid var(--secondary);
      border-radius: 0.5rem;
      font-family: 'DM Sans', sans-serif;
      font-size: 1rem;
      color: var(--text);
      background: var(--bg);
      transition: border-color 0.2s;
    }
    .input-group select:focus {
      outline: none;
      border-color: var(--accent);
    }

body { box-sizing: border-box; }