/* Import design tokens */
    :root {
      /* Colors */
      --color-teal-primary: #1DB88D;
      --color-teal-hover: #17a67d;
      --color-orange-accent: #FFC000;
      --color-gold-accent: #d4af37;
      --color-gold-hover: #e5c158;

      /* Light theme */
      --color-background: #FFFFFF;
      --color-surface: #FFFFFF;
      --color-secondary-bg: #F5F5F5;
      --color-tertiary-bg: #F8F9FA;
      --color-text: #1A1A1A;
      --color-text-secondary: #666666;
      --color-text-light: #888888;
      --color-border: #E0E0E0;
      --color-primary: var(--color-teal-primary);
      --color-primary-hover: var(--color-teal-hover);

      /* Status colors */
      --color-success: #10B981;
      --color-error: #EF4444;
      --color-warning: #FFC000;
      --color-info: #3B82F6;

      /* Dark theme colors */
      --color-dark-bg: #22262e;
      --color-dark-surface: #2a3142;
      --color-dark-sidebar: #2a3142;
      --color-dark-text: #FFFFFF;
      --color-dark-text-secondary: #B0B0B0;
      --color-dark-border: #3a4452;

      /* Typography */
      --font-family: 'Roboto', -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
      --font-size-xs: 12px;
      --font-size-sm: 14px;
      --font-size-base: 16px;
      --font-size-lg: 18px;
      --font-size-xl: 20px;
      --font-size-2xl: 24px;
      --font-size-3xl: 32px;

      /* Spacing */
      --space-xs: 4px;
      --space-sm: 8px;
      --space-md: 12px;
      --space-lg: 16px;
      --space-xl: 24px;
      --space-2xl: 32px;
      --space-3xl: 48px;

      /* Borders */
      --radius-sm: 6px;
      --radius-md: 8px;
      --radius-lg: 12px;
      --radius-xl: 16px;

      /* Shadows */
      --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
      --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
      --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);

      /* Layout */
      --sidebar-width: 300px;
      --sidebar-collapsed-width: 100px;
      --header-height: 74px;
    }

    [data-theme="dark"] {
      --color-background: var(--color-dark-bg);
      --color-surface: var(--color-dark-surface);
      --color-secondary-bg: var(--color-dark-sidebar);
      --color-tertiary-bg: var(--color-dark-bg);
      --color-text: var(--color-dark-text);
      --color-text-secondary: var(--color-dark-text-secondary);
      --color-border: var(--color-dark-border);
      --color-primary: var(--color-gold-accent);
      --color-primary-hover: var(--color-gold-hover);
    }

    /* Reset & Base */
    

    body {
      font-family: var(--font-family);
      font-size: var(--font-size-base);
      line-height: 1.5;
      color: var(--color-text);
      background: var(--color-background);
      transition: background 250ms, color 250ms;
      zoom: 0.8;
    }

    /* Layout */
    .app-container { display: flex; flex-direction: column; min-height: 100vh; }
    .page-wrapper { display: flex; flex: 1; overflow: hidden; }

    /* Sidebar — override shared sidebar.css for extra vertical spacing */
    .sidebar {
      margin-top: calc(var(--header-height) + var(--space-lg));
      margin-bottom: var(--space-lg);
    }
    /* Main Content */
    .main-content { flex: 1; padding: calc(var(--header-height) + var(--space-xl)) var(--space-xl) var(--space-xl); overflow-y: auto; }
    .content-wrapper { max-width: 1400px; margin: 0 auto; }
    .page-header { margin-bottom: var(--space-2xl); }
    .page-title { font-size: var(--font-size-3xl); font-weight: 700; color: var(--color-text); margin-bottom: var(--space-sm); }
    .page-description { font-size: var(--font-size-base); color: var(--color-text-secondary); max-width: 800px; }

    /* Buttons */
    .btn { display: inline-flex; align-items: center; gap: var(--space-sm); padding: var(--space-md) var(--space-lg); border-radius: var(--radius-md); font-size: var(--font-size-sm); font-weight: 500; cursor: pointer; transition: all 200ms; border: none; text-decoration: none; white-space: nowrap; }
    
    
    .btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }
    .btn-secondary { background: var(--color-secondary-bg); color: var(--color-text); border: 1px solid var(--color-border); }
    .btn-secondary:hover { background: var(--color-tertiary-bg); border-color: var(--color-primary); }
    .btn-sm { padding: var(--space-sm) var(--space-md); font-size: var(--font-size-xs); }
    .btn-icon { width: 16px; height: 16px; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; fill: none; }

    /* Scenario Selector */
    .scenario-selector { background: var(--color-secondary-bg); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: var(--space-sm) var(--space-md); margin-bottom: var(--space-md); }
    .scenario-selector-row { display: flex; align-items: flex-end; gap: var(--space-md); flex-wrap: wrap; }
    .form-group { display: flex; flex-direction: column; gap: 3px; flex: 1; min-width: 160px; }
    .form-label { font-size: var(--font-size-xs); font-weight: 600; color: var(--color-text-secondary); }
    .form-select, .form-input { padding: 6px var(--space-sm); border: 1px solid var(--color-border); border-radius: var(--radius-md); font-size: var(--font-size-sm); color: var(--color-text); background: var(--color-surface); transition: all 200ms; }
    .form-select:hover, .form-input:hover { border-color: var(--color-primary); }
    .form-select:focus, .form-input:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(29, 184, 141, 0.1); }
    .form-select:disabled, .form-input:disabled { opacity: 0.6; cursor: not-allowed; background: var(--color-secondary-bg); }

    /* Summary Stats Grid */
    .summary-stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: var(--space-md); margin-bottom: var(--space-xl); }
    .stat-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-md) var(--space-lg); }
    .stat-card-label { font-size: var(--font-size-xs); font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; color: var(--color-text-secondary); margin-bottom: 4px; }
    .stat-card-value { font-size: 1.45rem; font-weight: 700; color: var(--color-text); line-height: 1.2; }
    .stat-card-value.positive { color: var(--color-success); }
    .stat-card-value.negative { color: var(--color-error); }
    .stat-sub { margin-top: 6px; display: flex; flex-direction: column; gap: 3px; }
    .stat-sub-row { display: flex; justify-content: space-between; align-items: baseline; font-size: 0.78rem; padding: 2px 0; border-bottom: 1px solid var(--color-border); color: var(--color-text-secondary); }
    .stat-sub-row:last-child { border-bottom: none; }
    .stat-sub-key { font-weight: 500; }
    .stat-sub-val { font-weight: 700; color: var(--color-text); }

    /* Gauge card */
    .stat-card.gauge-card { display: flex; flex-direction: column; }
    .gauge-container { flex: 1; min-height: 150px; display: flex; align-items: center; justify-content: center; }

    /* Chart Section */
    .chart-section { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-xl); margin-bottom: var(--space-xl); }
    .chart-title { font-size: var(--font-size-lg); font-weight: 700; color: var(--color-text); margin-bottom: var(--space-lg); }
    .chart-container { width: 100%; min-height: 400px; background: var(--color-tertiary-bg); border-radius: var(--radius-md); overflow: hidden; }

    /* Charts grid — 2 columns */
    .charts-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-xl); margin-bottom: var(--space-xl); }
    .charts-grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: var(--space-lg); margin-bottom: var(--space-xl); }
    .charts-grid-3 .chart-section { padding: var(--space-md); }
    .charts-grid-3 .chart-container { min-height: 280px; }
    @media (max-width: 1100px) { .charts-grid { grid-template-columns: 1fr; } .charts-grid-3 { grid-template-columns: 1fr; } }

    /* Detail Table */
    .detail-table-section { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-xl); margin-bottom: var(--space-xl); }
    .detail-table { width: 100%; border-collapse: collapse; font-size: var(--font-size-sm); }
    .detail-table thead th { background: var(--color-secondary-bg); color: var(--color-text); font-weight: 600; text-align: left; padding: var(--space-md); border-bottom: 2px solid var(--color-border); white-space: nowrap; }
    .detail-table thead th.right { text-align: right; }
    .detail-table tbody td { padding: var(--space-md); border-bottom: 1px solid var(--color-border); color: var(--color-text); }
    .detail-table tbody td.right { text-align: right; font-variant-numeric: tabular-nums; }
    .detail-table tbody tr:hover { background: var(--color-tertiary-bg); }
    .detail-table tfoot td { padding: var(--space-md); border-top: 2px solid var(--color-border); font-weight: 700; color: var(--color-text); }
    .detail-table tfoot td.right { text-align: right; font-variant-numeric: tabular-nums; }

    /* Progress Bar */
    .progress-container { background: var(--color-secondary-bg); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-xl); margin-bottom: var(--space-xl); display: none; }
    .progress-container.show { display: block; }
    .progress-title { font-size: var(--font-size-sm); font-weight: 600; color: var(--color-text); margin-bottom: var(--space-md); }
    .progress-bar { width: 100%; height: 8px; background: var(--color-border); border-radius: var(--radius-sm); overflow: hidden; }
    .progress-fill { height: 100%; background: var(--color-primary); transition: width 300ms ease; }
    .progress-text { font-size: var(--font-size-xs); color: var(--color-text-secondary); margin-top: var(--space-sm); }

    /* Modal */
    .modal { display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0,0,0,0.5); z-index: 10000; align-items: center; justify-content: center; }
    .modal-content { background: var(--color-surface); padding: var(--space-2xl); border-radius: var(--radius-lg); max-width: 900px; max-height: 90vh; width: 90%; overflow-y: auto; }

    /* Loading Spinner */
    .loading-spinner { display: inline-flex; align-items: center; gap: var(--space-sm); padding: var(--space-lg); color: var(--color-text-secondary); font-size: var(--font-size-sm); }
    .spinner { width: 20px; height: 20px; border: 3px solid var(--color-border); border-top-color: var(--color-primary); border-radius: 50%; animation: spin 1s linear infinite; }
    @keyframes spin { to { transform: rotate(360deg); } }

    /* Hidden sections until data loads */
    #summarySection, #chartsSection, #detailSection { display: none; }