:root {
        --color-bg: #f8f7f4;
        --color-surface: #ffffff;
        --color-primary: #16a34a;
        --color-primary-dark: #15803d;
        --color-primary-light: #bbf7d0;
        --color-accent: #f59e0b;
        --color-danger: #ef4444;
        --color-text: #1f2937;
        --color-text-muted: #6b7280;
        --color-border: #e5e7eb;
        --shadow-card:
          0 1px 3px rgba(0, 0, 0, 0.08), 0 4px 16px rgba(0, 0, 0, 0.04);
        --radius: 10px;
      }

      * {
        box-sizing: border-box;
      }

      body {
        background: var(--color-bg);
        color: var(--color-text);
        font-family: "Hiragino Sans", "Yu Gothic", "Meiryo", sans-serif;
      }

      /* --- Tab Navigation --- */
      .tab-nav {
        display: flex;
        gap: 6px;
        margin-bottom: 20px;
        background: var(--color-border);
        padding: 4px;
        border-radius: calc(var(--radius) + 2px);
        flex-wrap: wrap;
      }
      .tab-btn {
        flex: 1;
        min-width: 80px;
        padding: 8px 12px;
        border: none;
        background: transparent;
        border-radius: var(--radius);
        font-size: 0.85rem;
        font-weight: 600;
        cursor: pointer;
        color: var(--color-text-muted);
        transition: all 0.2s;
        text-align: center;
      }
      .tab-btn.active {
        background: white;
        color: var(--color-primary);
        box-shadow: 0 1px 4px rgba(0, 0, 0, 0.1);
      }
      .tab-panel {
        display: none;
      }
      .tab-panel.active {
        display: block;
      }

      /* --- Cards --- */
      .card {
        background: var(--color-surface);
        border-radius: var(--radius);
        box-shadow: var(--shadow-card);
        padding: 20px;
        margin-bottom: 16px;
      }
      .card-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        margin-bottom: 16px;
      }
      .card-title {
        font-size: 1rem;
        font-weight: 700;
        color: var(--color-text);
        display: flex;
        align-items: center;
        gap: 8px;
      }

      /* --- Meal Type Badge --- */
      .meal-badge {
        display: inline-flex;
        align-items: center;
        gap: 4px;
        padding: 3px 10px;
        border-radius: 99px;
        font-size: 0.75rem;
        font-weight: 700;
      }
      .meal-badge.morning {
        background: #fef3c7;
        color: #d97706;
      }
      .meal-badge.lunch {
        background: #dbeafe;
        color: #2563eb;
      }
      .meal-badge.dinner {
        background: #e0e7ff;
        color: #4338ca;
      }
      .meal-badge.other {
        background: #ede9fe;
        color: #7c3aed;
      }

      /* --- Form elements --- */
      label {
        display: block;
        font-size: 0.8rem;
        font-weight: 600;
        color: var(--color-text-muted);
        margin-bottom: 4px;
        letter-spacing: 0.02em;
        text-transform: uppercase;
      }
      input[type="text"],
      input[type="number"],
      input[type="date"],
      select,
      textarea {
        width: 100%;
        padding: 9px 12px;
        border: 1.5px solid var(--color-border);
        border-radius: 7px;
        font-size: 0.9rem;
        color: var(--color-text);
        background: #fafafa;
        transition:
          border-color 0.15s,
          box-shadow 0.15s;
        outline: none;
      }
      input:focus:not([type="checkbox"]),
      select:focus,
      textarea:focus {
        border-color: var(--color-primary);
        box-shadow: 0 0 0 3px rgba(22, 163, 74, 0.12);
        background: white;
      }

      /* --- Buttons --- */
      .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 6px;
        padding: 9px 18px;
        border: none;
        border-radius: 7px;
        font-size: 0.875rem;
        font-weight: 600;
        cursor: pointer;
        transition: all 0.15s;
      }
      .btn-primary {
        background: var(--color-primary);
        color: white;
      }
      .btn-primary:hover {
        background: var(--color-primary-dark);
        transform: translateY(-1px);
      }
      .btn-secondary {
        background: var(--color-border);
        color: var(--color-text);
      }
      .btn-secondary:hover {
        background: #d1d5db;
      }
      .btn-danger {
        background: #fee2e2;
        color: var(--color-danger);
      }
      .btn-danger:hover {
        background: #fecaca;
      }
      .btn-sm {
        padding: 5px 12px;
        font-size: 0.8rem;
      }
      .btn-icon {
        padding: 6px;
        background: transparent;
        border: none;
        cursor: pointer;
        border-radius: 6px;
        color: var(--color-text-muted);
        transition: all 0.15s;
        display: inline-flex;
        align-items: center;
      }
      .btn-icon:hover {
        background: var(--color-border);
        color: var(--color-text);
      }
      .btn-icon.danger:hover {
        background: #fee2e2;
        color: var(--color-danger);
      }

      /* --- Type Toggle --- */
      .type-toggle {
        display: flex;
        gap: 0;
        border: 1.5px solid var(--color-border);
        border-radius: 7px;
        overflow: hidden;
      }
      .type-toggle button {
        flex: 1;
        padding: 8px;
        border: none;
        background: transparent;
        font-size: 0.8rem;
        font-weight: 600;
        cursor: pointer;
        color: var(--color-text-muted);
        transition: all 0.15s;
      }
      .type-toggle button.active {
        background: var(--color-primary);
        color: white;
      }

      /* --- Ingredient rows --- */
      .ingredient-row {
        display: grid;
        grid-template-columns: 1fr auto auto auto;
        gap: 8px;
        align-items: center;
        padding: 8px;
        background: #f9fafb;
        border-radius: 7px;
        margin-bottom: 6px;
      }
      .ingredient-row .ing-name {
        font-size: 0.85rem;
        font-weight: 600;
      }
      .ingredient-row .ing-price {
        font-size: 0.75rem;
        color: var(--color-text-muted);
      }
      .ingredient-row .ing-usage {
        display: flex;
        align-items: center;
        gap: 4px;
        font-size: 0.8rem;
      }
      .ing-usage input[type="number"] {
        width: 64px;
        padding: 4px 6px;
        font-size: 0.8rem;
      }
      .ing-usage select {
        padding: 4px 6px;
        font-size: 0.8rem;
        width: auto;
      }
      .computed-cost {
        font-size: 0.85rem;
        font-weight: 700;
        color: var(--color-primary);
        text-align: right;
        min-width: 52px;
      }

      /* --- Record list --- */
      .record-item {
        display: flex;
        align-items: flex-start;
        gap: 12px;
        padding: 14px;
        border: 1.5px solid var(--color-border);
        border-radius: var(--radius);
        margin-bottom: 10px;
        transition:
          border-color 0.15s,
          box-shadow 0.15s;
        background: white;
      }
      .record-item:hover {
        border-color: #c4c9d0;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
      }
      .record-icon {
        width: 36px;
        height: 36px;
        border-radius: 8px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1rem;
        flex-shrink: 0;
      }
      .record-icon.morning {
        background: #fef3c7;
      }
      .record-icon.lunch {
        background: #dbeafe;
      }
      .record-icon.dinner {
        background: #e0e7ff;
      }
      .record-icon.other {
        background: #ede9fe;
      }
      .record-body {
        flex: 1;
        min-width: 0;
      }
      .record-title {
        font-size: 0.9rem;
        font-weight: 700;
        margin-bottom: 2px;
      }
      .record-sub {
        font-size: 0.78rem;
        color: var(--color-text-muted);
        display: flex;
        flex-wrap: wrap;
        gap: 4px;
        align-items: center;
      }
      .record-cost {
        font-size: 1rem;
        font-weight: 800;
        color: var(--color-primary);
        white-space: nowrap;
      }

      /* --- Date header --- */
      .date-group-header {
        display: flex;
        align-items: center;
        gap: 10px;
        margin: 20px 0 10px;
        font-size: 0.8rem;
        font-weight: 700;
        color: var(--color-text-muted);
        text-transform: uppercase;
        letter-spacing: 0.06em;
      }
      .date-group-header::after {
        content: "";
        flex: 1;
        height: 1px;
        background: var(--color-border);
      }
      .date-total {
        font-size: 0.75rem;
        font-weight: 700;
        color: var(--color-primary);
        background: var(--color-primary-light);
        padding: 2px 8px;
        border-radius: 99px;
      }

      /* --- Summary stats --- */
      .stat-card {
        background: white;
        border-radius: var(--radius);
        box-shadow: var(--shadow-card);
        padding: 16px 20px;
        display: flex;
        flex-direction: column;
        gap: 4px;
      }
      .stat-label {
        font-size: 0.75rem;
        font-weight: 600;
        color: var(--color-text-muted);
        text-transform: uppercase;
        letter-spacing: 0.04em;
      }
      .stat-value {
        font-size: 1.5rem;
        font-weight: 800;
        color: var(--color-text);
      }
      .stat-value span {
        font-size: 0.9rem;
        font-weight: 600;
        color: var(--color-text-muted);
        margin-left: 2px;
      }

      /* --- Food inventory --- */
      .food-item {
        display: grid;
        grid-template-columns: 1fr auto auto;
        gap: 10px;
        align-items: center;
        padding: 10px 12px;
        border: 1.5px solid var(--color-border);
        border-radius: 8px;
        margin-bottom: 8px;
        background: white;
      }
      .food-item-info .food-name {
        font-size: 0.9rem;
        font-weight: 700;
      }
      .food-item-info .food-price {
        font-size: 0.75rem;
        color: var(--color-text-muted);
      }
      .food-remaining {
        font-size: 0.8rem;
        font-weight: 600;
        color: var(--color-text-muted);
        background: #f3f4f6;
        border-radius: 99px;
        padding: 2px 10px;
        white-space: nowrap;
      }
      .food-remaining.low {
        background: #fee2e2;
        color: var(--color-danger);
      }

      /* --- Month nav --- */
      .month-nav {
        display: flex;
        align-items: center;
        gap: 12px;
      }
      .month-nav button {
        padding: 4px 10px;
        border: 1.5px solid var(--color-border);
        border-radius: 6px;
        background: white;
        cursor: pointer;
        font-size: 0.85rem;
        font-weight: 600;
        transition: all 0.15s;
      }
      .month-nav button:hover {
        background: var(--color-border);
      }
      .month-label {
        font-size: 1rem;
        font-weight: 800;
        color: var(--color-text);
        min-width: 90px;
        text-align: center;
      }

      /* --- Modal --- */
      .modal-overlay {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.45);
        z-index: 1000;
        justify-content: center;
        align-items: center;
      }
      .modal-overlay.open {
        display: flex;
      }
      .modal {
        background: white;
        border-radius: 14px;
        padding: 24px;
        width: min(500px, 95vw);
        max-height: 90vh;
        overflow-y: auto;
        box-shadow: 0 8px 40px rgba(0, 0, 0, 0.18);
      }
      .modal-title {
        font-size: 1.1rem;
        font-weight: 800;
        margin-bottom: 18px;
        color: var(--color-text);
      }
      .modal-actions {
        display: flex;
        gap: 8px;
        justify-content: flex-end;
        margin-top: 20px;
      }

      /* --- Empty state --- */
      .empty-state {
        text-align: center;
        padding: 48px 20px;
        color: var(--color-text-muted);
      }
      .empty-state .empty-icon {
        font-size: 2.5rem;
        margin-bottom: 10px;
      }
      .empty-state p {
        font-size: 0.9rem;
      }

      /* --- Chart --- */
      .bar-chart {
        display: flex;
        flex-direction: column;
        gap: 8px;
      }
      .bar-row {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 0.8rem;
      }
      .bar-label {
        width: 60px;
        text-align: right;
        color: var(--color-text-muted);
        font-weight: 600;
        flex-shrink: 0;
      }
      .bar-track {
        flex: 1;
        background: #f3f4f6;
        height: 20px;
        border-radius: 99px;
        overflow: hidden;
      }
      .bar-fill {
        height: 100%;
        border-radius: 99px;
        transition: width 0.4s ease;
      }
      .bar-amount {
        width: 60px;
        font-weight: 700;
        color: var(--color-text);
      }

      /* --- Misc --- */
      .form-row {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 12px;
      }
      .form-group {
        margin-bottom: 14px;
      }
      .text-right {
        text-align: right;
      }
      .section-title {
        font-size: 1rem;
        font-weight: 800;
        color: var(--color-text);
        margin-bottom: 12px;
      }
      .tag {
        display: inline-flex;
        align-items: center;
        padding: 1px 8px;
        border-radius: 99px;
        font-size: 0.72rem;
        font-weight: 600;
      }
      .tag-cooking {
        background: #dcfce7;
        color: #15803d;
      }
      .tag-eating-out {
        background: #fff7ed;
        color: #c2410c;
      }
      .tag-prepmake {
        background: #e0e7ff;
        color: #4338ca;
      }
      hr {
        border: none;
        border-top: 1.5px solid var(--color-border);
        margin: 16px 0;
      }

      @media (max-width: 600px) {
        .form-row {
          grid-template-columns: 1fr;
        }
      }