[data-theme="dark"], :root {
    --bg-body: #0f172a;
    --bg-panel: #1e293b;
    --bg-input: #020617;
    --border-color: #334155;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --text-note: #a3b8cf;
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --radius: 8px;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  }

  [data-theme="light"] {
    --bg-body:    #f1f5f9;
    --bg-panel:   #ffffff;
    --bg-input:   #f8fafc;
    --border-color: #e2e8f0;
    --text-main:  #0f172a;
    --text-muted: #64748b;
    --text-note:  #475569;
    --primary:    #2563eb;
    --primary-hover: #1d4ed8;
    --success:    #059669;
    --warning:    #d97706;
    --danger:     #dc2626;
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -1px rgba(0,0,0,0.04);
  }

  [data-theme="light"] .header-content h1 {
    background: linear-gradient(to right, #1d4ed8, #059669);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }
  [data-theme="light"] .storage-notice {
    background: rgba(217, 119, 6, 0.08);
    border-color: rgba(217, 119, 6, 0.3);
  }
  [data-theme="light"] thead {
    background: #f1f5f9;
  }
  [data-theme="light"] tr:hover {
    background: rgba(0,0,0,0.02);
  }
  [data-theme="light"] tr.highlight-fire {
    background: rgba(5, 150, 105, 0.08);
  }
  [data-theme="light"] tr.highlight-fire td {
    color: #059669;
  }
  [data-theme="light"] .timeline-bar .phase-segment[data-phase="werken"]  { background: #94a3b8; }
  [data-theme="light"] .resizer:hover, [data-theme="light"] .resizer.dragging { background: var(--primary); }

  .theme-toggle {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 16px;
    padding: 6px 10px;
    transition: all 0.2s;
    line-height: 1;
  }
  .theme-toggle:hover {
    border-color: var(--primary);
    color: var(--text-main);
  }

  * {
    box-sizing: border-box;
  }

  body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    margin: 0;
    padding: 0;
    background: var(--bg-body);
    color: var(--text-main);
    height: 100vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
  }

  /* Scrollbar Styling */
  ::-webkit-scrollbar {
    width: 8px;
    height: 8px;
  }
  ::-webkit-scrollbar-track {
    background: var(--bg-body);
  }
  ::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
  }
  ::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
  }

  header {
    padding: 16px 24px;
    background: var(--bg-panel);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow);
    z-index: 10;
  }

  .header-content h1 {
    margin: 0;
    font-size: 20px;
    font-weight: 700;
    background: linear-gradient(to right, #60a5fa, #34d399);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }

  .header-content p {
    margin: 4px 0 0;
    font-size: 13px;
    color: var(--text-muted);
  }
  .header-back {
    font-size: 12px;
    color: var(--text-muted);
  }
  .header-back a {
    color: var(--primary);
    text-decoration: none;
    margin-right: 12px;
  }
  .header-back a:hover {
    text-decoration: underline;
  }

  /* === Dashboard Header (Wealth Summary & Control Strip) === */
  .dashboard-header {
    background: var(--bg-panel);
    border-bottom: 1px solid var(--border-color);
    padding: 12px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    z-index: 9;
    flex-shrink: 0;
  }

  .wealth-summary-bar {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    align-items: center;
  }

  .wealth-pillar {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s ease;
  }

  .wealth-pillar:hover {
    border-color: var(--primary);
    box-shadow: 0 0 0 1px rgba(59, 130, 246, 0.1);
  }

  .pillar-label {
    color: var(--text-muted);
  }

  .pillar-value {
    font-weight: 600;
    color: var(--text-main);
  }
  
  .pillar-unit {
    color: var(--text-muted);
    font-size: 12px;
  }

  .control-strip {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    align-items: center;
  }

  .control-pill {
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 999px;
    padding: 6px 14px;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 6px;
    font-family: inherit;
  }

  .control-pill:hover {
    background: var(--bg-input);
    color: var(--text-main);
    border-color: var(--primary);
  }

  @media (max-width: 1100px) {
    .dashboard-header {
      flex-direction: column;
      align-items: flex-start;
    }
  }

  @media (max-width: 768px) {
    .dashboard-header {
      padding: 12px 16px;
    }
    .wealth-summary-bar {
      gap: 8px;
    }
    .wealth-pillar {
      flex: 1 1 calc(50% - 8px);
      min-width: 140px;
    }
  }

  main {
    display: flex;
    flex: 1;
    overflow: hidden;
  }

  /* Drawer Panel */
  .drawer-panel {
    position: fixed;
    right: 0;
    top: 0;
    height: 100vh;
    width: 400px;
    max-width: 100%;
    background: var(--bg-panel);
    box-shadow: -4px 0 15px rgba(0,0,0,0.1);
    transform: translateX(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1000;
    overflow-y: auto;
    padding: 0;
    display: flex;
    flex-direction: column;
  }
  
  .drawer-panel > .input-group,
  .drawer-panel > .safety-margin-box {
    padding: 0 20px;
    margin-bottom: 24px;
  }
  .drawer-panel > #saveBtn {
    margin: 0 20px 24px 20px;
    width: calc(100% - 40px);
  }
  
  .drawer-panel.drawer-open {
    transform: translateX(0);
  }
  
  .drawer-header {
    display: flex;
    justify-content: space-between;
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    background: var(--bg-panel);
    z-index: 10;
    margin-bottom: 24px;
  }
  .drawer-header h2 {
    margin: 0;
    font-size: 16px;
    font-weight: 600;
  }
  .drawer-close {
    background: none;
    border: none;
    font-size: 18px;
    cursor: pointer;
    color: var(--text-muted);
  }
  .drawer-close:hover {
    color: var(--text-main);
  }
  
  .drawer-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    backdrop-filter: blur(2px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    z-index: 999;
  }
  .drawer-overlay.drawer-open {
    opacity: 1;
    pointer-events: auto;
  }

  .input-group h3 {
    margin: 0 0 16px;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    font-weight: 600;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 6px;
    cursor: pointer;
    user-select: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
  }
  .input-group h3::after {
    content: '▾';
    font-size: 14px;
    transition: transform 0.2s;
    flex-shrink: 0;
    margin-left: 4px;
  }
  .input-group.collapsed h3::after {
    transform: rotate(-90deg);
  }
  .input-group-body {
    overflow: hidden;
    transition: max-height 0.3s ease, opacity 0.2s ease;
    max-height: 2000px;
    opacity: 1;
    padding-top: 6px;
  }
  .drawer-panel .input-group-body .small-note,
  .drawer-panel .input-group-body > p {
    color: var(--text-main);
  }
  .input-group.collapsed .input-group-body {
    max-height: 0;
    opacity: 0;
  }

  .form-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
    font-size: 13px;
  }

  .form-row label {
    flex: 1;
    color: var(--text-main);
    padding-right: 12px;
  }

  .form-row input,
  .form-row select {
    width: 140px;
    padding: 8px 12px;
    font-size: 13px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    background: var(--bg-input);
    color: var(--text-main);
    transition: all 0.2s;
    font-family: inherit;
  }

  .form-row input:focus,
  .form-row select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
  }

  .small-note {
    font-size: 11px;
    color: var(--text-note);
    margin-top: -8px;
    margin-bottom: 12px;
    line-height: 1.4;
  }

  /* Custom Switch */
  .switch-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
  }
  .switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
  }
  .switch input { 
    opacity: 0;
    width: 0;
    height: 0;
  }
  .slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    transition: .4s;
    border-radius: 24px;
  }
  .slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 2px;
    bottom: 2px;
    background-color: var(--text-muted);
    transition: .4s;
    border-radius: 50%;
  }
  input:checked + .slider {
    background-color: var(--primary);
    border-color: var(--primary);
  }
  input:checked + .slider:before {
    transform: translateX(20px);
    background-color: white;
  }
  .switch input:focus-visible + .slider {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
  }

  /* Pension interpolation */
  .pension-interpolation {
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px;
    margin-bottom: 12px;
  }
  .pension-interpolation .form-row,
  .pension-interpolation .wizard-field {
    margin-bottom: 8px;
  }
  .pension-interpolation .small-note {
    margin-bottom: 8px;
  }
  .pension-interpolation .small-note a {
    color: var(--primary);
    text-decoration: underline;
  }
  .pension-estimate {
    font-size: 13px;
    font-weight: 600;
    color: var(--primary);
    background: color-mix(in srgb, var(--primary) 10%, transparent);
    border-radius: 6px;
    padding: 8px 12px;
    min-height: 0;
  }
  .pension-estimate:empty {
    display: none;
  }

  /* Resizer */
  .resizer {
    width: 4px;
    background: transparent;
    cursor: col-resize;
    transition: background 0.2s;
    z-index: 20;
  }
  .resizer:hover, .resizer.dragging {
    background: var(--primary);
  }

  /* Output Panel */
  #outputPanel {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 24px;
    background: var(--bg-body);
  }

  /* Metrics Cards */
  .dashboard-cards {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 16px;
    margin-bottom: 16px;
  }

  @media (max-width: 768px) {
    .dashboard-cards {
      grid-template-columns: 1fr;
    }
  }

  .gauge-container {
    position: relative;
    width: 100%;
    max-width: 160px;
    margin: 16px auto 0;
  }

  .gauge-svg {
    width: 100%;
    height: auto;
    overflow: visible;
  }

  .gauge-bg {
    stroke: var(--border-color, #e2e8f0);
  }

  .gauge-fill {
    stroke: var(--primary, #3b82f6);
    stroke-dasharray: 157; /* Math.PI * r (50) = 157 */
    stroke-dashoffset: 157;
    transition: stroke-dashoffset 1s ease-out, stroke 0.5s ease;
  }

  .gauge-text {
    position: absolute;
    bottom: 5px;
    top: auto;
    left: 50%;
    transform: translate(-50%, 0);
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-color);
  }

  .metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
  }

  .metric-card {
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 16px;
    box-shadow: var(--shadow);
    transition: transform 0.2s;
  }
  
  .metric-card:hover {
    transform: translateY(-2px);
    border-color: var(--primary);
  }

  .metric-title {
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
  }

  .metric-value {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-main);
  }

  .metric-badge {
    display: inline-block;
    padding: 2px 6px;
    border-radius: 10px;
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    vertical-align: middle;
    margin-left: 6px;
    white-space: nowrap;
  }

  .badge-conservative {
    background: rgba(59, 130, 246, 0.15);
    color: var(--primary);
    border: 1px solid rgba(59, 130, 246, 0.3);
  }

  .badge-neutral {
    background: rgba(148, 163, 184, 0.15);
    color: var(--text-muted);
    border: 1px solid rgba(148, 163, 184, 0.3);
  }


  /* Chart Container */
  .chart-wrapper {
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 20px;
    height: 400px;
    box-shadow: var(--shadow);
    position: relative;
  }

  /* Chart toolbar (3 Scenarios / Monte Carlo toggle) */
  .chart-toolbar {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 12px;
    flex-wrap: wrap;
  }
  .chart-toolbar-label {
    font-size: 12px;
    color: var(--text-muted);
    margin-right: 2px;
  }
  .chart-mode-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 12px;
    font-family: 'Inter', sans-serif;
    padding: 4px 12px;
    transition: all 0.15s;
  }
  .chart-mode-btn:hover {
    border-color: var(--primary);
    color: var(--text-main);
  }
  .chart-mode-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
    font-weight: 500;
  }
  .chart-mode-btn--locked {
    opacity: 0.6;
    cursor: pointer;
  }
  .chart-mode-btn--locked:hover {
    border-color: var(--border-color);
    color: var(--text-muted);
  }
  .mc-status {
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 8px;
    padding: 6px 10px;
    background: rgba(59,130,246,0.07);
    border-radius: 6px;
    border-left: 3px solid var(--primary);
  }
  .chart-section-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
  }

  /* Table */
  .table-wrapper {
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    flex: 1;
    min-height: 300px;
    display: flex;
    flex-direction: column;
  }
  
  .table-scroll {
    overflow: auto;
    flex: 1;
  }

  table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
    white-space: nowrap;
  }

  thead {
    background: var(--bg-input);
  }

  #resultTable thead {
    position: sticky;
    top: 0;
    z-index: 5;
  }

  th {
    text-align: right;
    padding: 12px 16px;
    font-weight: 600;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-color);
  }
  
  th:first-child, td:first-child { text-align: left; }
  #resultTable th:last-child { text-align: left; }

  td {
    padding: 10px 16px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-main);
    text-align: right;
  }

  tr:last-child td { border-bottom: none; }
  
  tr:hover {
    background: rgba(255, 255, 255, 0.03);
  }

  tr.highlight-fire {
    background: rgba(16, 185, 129, 0.1);
    position: relative;
  }
  tr.highlight-fire td {
    color: var(--success);
    font-weight: 500;
  }

  /* Info Box */
  .info-box {
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    flex-shrink: 0;
  }
  .info-box summary {
    padding: 18px 24px;
    cursor: pointer;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 10px;
    list-style: none;
    user-select: none;
    transition: color 0.2s;
  }
  .info-box summary::-webkit-details-marker { display: none; }
  .info-box summary::before {
    content: '▶';
    font-size: 12px;
    transition: transform 0.2s;
    flex-shrink: 0;
  }
  .info-box[open] summary::before { transform: rotate(90deg); }
  .info-box summary:hover { color: var(--text-main); }
  .info-box .info-content {
    padding: 8px 24px 28px;
    font-size: 14px;
    line-height: 1.8;
    color: var(--text-muted);
    min-height: 420px;
    max-height: 65vh;
    overflow-y: auto;
  }
  .info-box .info-content h4 {
    color: var(--text-main);
    font-size: 15px;
    margin: 20px 0 10px;
    font-weight: 600;
  }
  .info-box .info-content h4:first-child { margin-top: 0; }
  .info-box .info-content ul {
    margin: 8px 0 0;
    padding-left: 22px;
  }
  .info-box .info-content li { margin-bottom: 10px; }
  .info-box .info-content p { margin: 8px 0 0; }
  .info-box .info-content .tag {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 3px 8px;
    border-radius: 4px;
    vertical-align: middle;
    margin-right: 6px;
  }
  .info-box .tag.conservative { background: rgba(16, 185, 129, 0.15); color: var(--success); }
  .info-box .tag.neutral     { background: rgba(59, 130, 246, 0.15); color: var(--primary); }
  .info-box .tag.aware       { background: rgba(245, 158, 11, 0.15); color: var(--warning); }

  .storage-notice {
    font-size: 12px;
    color: var(--warning);
    margin: 0 0 12px;
    padding: 10px 14px;
    background: rgba(245, 158, 11, 0.1);
    border-radius: 6px;
    border: 1px solid rgba(245, 158, 11, 0.35);
  }

  .tax-year-warning {
    font-size: 14px;
    font-weight: 600;
    color: var(--text, #e2e8f0);
    margin: 0 0 16px;
    padding: 14px 18px;
    background: rgba(239, 68, 68, 0.15);
    border-radius: 8px;
    border: 2px solid rgba(239, 68, 68, 0.5);
  }

  [data-theme="light"] .tax-year-warning {
    background: rgba(239, 68, 68, 0.08);
    border-color: rgba(239, 68, 68, 0.4);
    color: var(--text, #0f172a);
  }

  /* Auto-badge on auto-calculated fields */
  .auto-badge {
    display: inline-block;
    font-size: 9px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    background: rgba(59, 130, 246, 0.15);
    color: var(--primary);
    border: 1px solid rgba(59, 130, 246, 0.3);
    border-radius: 3px;
    padding: 1px 5px;
    vertical-align: middle;
    margin-left: 4px;
    line-height: 1.4;
  }

  /* Save Button */
  #saveBtn {
    background: linear-gradient(135deg, var(--success), #059669);
    color: white;
    border: none;
    border-radius: 6px;
    padding: 12px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    width: 100%;
    margin-top: 16px;
    transition: filter 0.2s;
    box-shadow: 0 4px 6px rgba(16, 185, 129, 0.2);
  }
  #saveBtn:hover {
    filter: brightness(1.1);
  }

  /* Safety Margin Box */
  .safety-margin-box {
    background: rgba(59, 130, 246, 0.05);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: 8px;
    padding: 16px;
    margin-top: auto;
    font-size: 12px;
    color: var(--text-muted);
  }
  .safety-margin-box h4 {
    margin: 0 0 12px 0;
    font-size: 13px;
    color: var(--text-main);
  }
  .safety-margin-list {
    margin: 0;
    padding: 0;
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
  }
  .safety-margin-list li {
    line-height: 1.4;
  }
  .safety-margin-box .tag {
    display: inline-block;
    font-size: 9px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 2px 6px;
    border-radius: 4px;
    vertical-align: middle;
    margin-right: 6px;
    margin-bottom: 2px;
  }
  .safety-margin-box .tag.conservative { background: rgba(59, 130, 246, 0.15); color: var(--primary); }
  .safety-margin-box .tag.neutral { background: rgba(16, 185, 129, 0.15); color: var(--success); }


  @media (max-width: 900px) {
    main { flex-direction: column; overflow-y: auto; }
    .drawer-panel { width: 100%; max-width: none; border-right: none; border-bottom: 1px solid var(--border-color); height: auto; overflow: visible; }
    .resizer { display: none; }
    #outputPanel { overflow: visible; height: auto; }
    .chart-wrapper { height: 300px; }
    .input-group:not(.always-open) {
      border-bottom: 1px solid var(--border-color);
      padding-bottom: 0;
    }

    /* Mobile Tabs Layout */
    body {
      padding-bottom: 60px; /* accommodate bottom tabs */
    }
    .mobile-tabs {
      display: flex;
    }
    
    /* Panel visibility controlled by JS */
    .drawer-panel.mobile-hidden,
    #outputPanel.mobile-hidden,
    #chartSection.mobile-hidden,
    #tableSection.mobile-hidden {
      display: none !important;
    }

    /* Increase touch targets */
    .form-row input, 
    .form-row select {
      padding: 10px 12px;
      font-size: 16px; /* prevent iOS zoom */
    }
    .switch-row {
      padding: 4px 0;
    }

    /* Table horizontal scroll */
    .table-wrapper {
      border-radius: 0;
      border-left: none;
      border-right: none;
    }
    .table-scroll {
      overflow-x: auto;
    }
    
    #resultTable th:nth-child(1),
    #resultTable td:nth-child(1) {
      position: sticky;
      left: 0;
      z-index: 2;
      background: var(--bg-panel);
    }
    #resultTable th:nth-child(2),
    #resultTable td:nth-child(2) {
      position: sticky;
      left: 65px; /* approximate width of first column */
      z-index: 2;
      background: var(--bg-panel);
      border-right: 1px solid var(--border-color);
    }
    [data-theme="light"] #resultTable th:nth-child(1),
    [data-theme="light"] #resultTable td:nth-child(1),
    [data-theme="light"] #resultTable th:nth-child(2),
    [data-theme="light"] #resultTable td:nth-child(2) {
      background: #ffffff;
    }
    [data-theme="light"] #resultTable thead th:nth-child(1),
    [data-theme="light"] #resultTable thead th:nth-child(2) {
      background: #f1f5f9;
    }
    #resultTable thead th:nth-child(1),
    #resultTable thead th:nth-child(2) {
      z-index: 6;
    }
  }

  /* Mobile Bottom Navigation Styles */
  .mobile-tabs {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    display: none;
    background: var(--bg-panel);
    border-top: 1px solid var(--border-color);
    z-index: 100;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.1);
  }
  .mobile-tab-btn {
    flex: 1;
    padding: 16px 0;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    text-align: center;
    border-bottom: 3px solid transparent;
    transition: all 0.2s;
  }
  .mobile-tab-btn.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
  }

  /* === Feature 2: Life Phase Table Row Highlighting === */
  tr.phase-go-go   { background: rgba(5, 150, 105, 0.06); }
  tr.phase-go-slow { background: rgba(217, 119, 6, 0.06); }
  tr.phase-no-go   { background: rgba(220, 38, 38, 0.06); }
  /* tr.highlight-fire takes priority — keep AFTER these rules */

  /* === Feature 1: Life Phase Timeline Bar === */
  .timeline-bar-wrapper {
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 14px 20px;
    box-shadow: var(--shadow);
  }
  .timeline-bar-label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 8px;
    font-weight: 600;
  }
  .timeline-bar {
    display: flex;
    height: 24px;
    border-radius: 6px;
    overflow: hidden;
    gap: 1px;
  }
  .timeline-bar .phase-segment {
    flex-shrink: 0;
    transition: opacity 0.15s;
    cursor: default;
    position: relative;
  }
  .timeline-bar .phase-segment:hover { opacity: 0.8; }
  .timeline-bar .phase-segment[data-phase="werken"]  { background: #334155; }
  .timeline-bar .phase-segment[data-phase="go-go"]   { background: #059669; }
  .timeline-bar .phase-segment[data-phase="go-slow"] { background: #d97706; }
  .timeline-bar .phase-segment[data-phase="no-go"]   { background: #dc2626; }
  .timeline-bar-legend {
    display: flex;
    gap: 16px;
    margin-top: 8px;
    flex-wrap: wrap;
  }
  .legend-item {
    font-size: 11px;
    color: var(--text-muted);
  }

  /* === Feature 4: Scenario Comparison Strip === */
  .scenario-strip {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 1px;
    background: var(--border-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
  }
  .scenario-col {
    background: var(--bg-panel);
    padding: 14px 20px;
    text-align: center;
  }
  .scenario-col-label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
    margin-bottom: 10px;
  }
  .scenario-col.pess .scenario-col-label { color: var(--warning); }
  .scenario-col.base .scenario-col-label { color: var(--text-muted); }
  .scenario-col.opt  .scenario-col-label { color: var(--success); }
  .scenario-row {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    padding: 3px 0;
    color: var(--text-muted);
  }
  .scenario-row .sv { color: var(--text-main); font-weight: 500; }

  /* === Feature 5: Accessibility — Skip Link === */
  .skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary);
    color: white;
    padding: 8px;
    z-index: 100;
    transition: top 0.2s;
    text-decoration: none;
  }
  .skip-link:focus {
    top: 0;
  }

  /* === Feature 5: Accessibility — Focus Visible === */
  :focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
  }
  input:focus-visible,
  select:focus-visible,
  button:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
  }

  /* === Feature 7: Wizard Button in Header === */
  .wizard-btn {
    background: linear-gradient(135deg, var(--primary), #6366f1);
    color: white;
    border: none;
    border-radius: 6px;
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: filter 0.2s;
    white-space: nowrap;
  }
  .wizard-btn:hover { filter: brightness(1.15); }

  /* === Feature 7: Wizard Modal === */
  .wizard-modal {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.7);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
  }
  .wizard-modal[hidden] { display: none; }

  .wizard-card {
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    width: 100%;
    max-width: 520px;
    box-shadow: 0 25px 50px rgba(0,0,0,0.5);
    overflow: hidden;
  }

  .wizard-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px 0;
  }
  .wizard-title {
    font-size: 18px;
    font-weight: 700;
    background: linear-gradient(to right, #60a5fa, #34d399);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }
  .wizard-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 18px;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    line-height: 1;
    transition: color 0.2s;
  }
  .wizard-close:hover { color: var(--text-main); }

  .wizard-progress {
    height: 3px;
    background: var(--border-color);
    margin: 16px 24px 0;
    border-radius: 2px;
    overflow: hidden;
  }
  .wizard-progress-bar {
    height: 100%;
    background: linear-gradient(to right, #3b82f6, #10b981);
    border-radius: 2px;
    transition: width 0.3s ease;
    width: 25%;
  }

  .wizard-steps {
    padding: 24px;
  }

  .wizard-step h3 {
    margin: 0 0 6px;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-main);
  }

  .wizard-desc {
    font-size: 13px;
    color: var(--text-muted);
    margin: 0 0 20px;
    line-height: 1.5;
  }

  .premium-error {
    font-size: 13px;
    color: var(--error-color, #dc2626);
    margin: 8px 0 0;
  }
  .upgrade-btn {
    background: linear-gradient(135deg, #10b981, #059669);
  }

  .premium-days {
    background: transparent;
    color: var(--text-muted, #64748b);
    font-weight: 500;
    cursor: default;
  }

  .wizard-field {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 14px;
    font-size: 13px;
  }
  .wizard-field label {
    flex: 1;
    color: var(--text-main);
    padding-right: 12px;
  }
  .wizard-field input[type="number"] {
    width: 150px;
    padding: 8px 12px;
    font-size: 13px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    background: var(--bg-input);
    color: var(--text-main);
    font-family: inherit;
  }
  .wizard-field input[type="number"]:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
  }

  /* Wizard step 1 toggle: compact switch, clear off (grey) vs on (blue) */
  .wizard-step .wizard-field.switch-row .switch {
    flex-shrink: 0;
    width: 40px;
    height: 22px;
  }
  .wizard-step .wizard-field.switch-row .slider {
    background-color: var(--border-color);
    border-color: var(--border-color);
  }
  .wizard-step .wizard-field.switch-row input:checked + .slider {
    background-color: var(--primary);
    border-color: var(--primary);
  }
  .wizard-step .wizard-field.switch-row .slider:before {
    height: 16px;
    width: 16px;
    left: 2px;
    bottom: 2px;
    background-color: #94a3b8;
  }
  .wizard-step .wizard-field.switch-row input:checked + .slider:before {
    transform: translateX(18px);
    background-color: white;
  }

  .wizard-footer {
    padding: 16px 24px 20px;
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    border-top: 1px solid var(--border-color);
  }
  .wizard-btn-back {
    background: none;
    color: var(--text-muted);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 10px 16px;
    font-size: 13px;
    cursor: pointer;
    margin-right: auto;
    transition: all 0.2s;
  }
  .wizard-btn-back:hover { background: var(--bg-body); color: var(--text-main); }

  .wizard-btn-next, .wizard-btn-finish {
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 6px;
    padding: 10px 20px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: filter 0.2s;
  }
  .wizard-btn-finish { background: var(--success); }
  .wizard-btn-next:hover, .wizard-btn-finish:hover { filter: brightness(1.1); }

  /* === Phase 3b: PDF, Scenario Compare, Sensitivity === */

  .phase3b-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 8px 0 4px;
    padding: 0;
  }

  .phase3b-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 16px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    border: 1.5px solid transparent;
    transition: all 0.18s;
    line-height: 1.2;
  }

  .pdf-btn {
    background: rgba(239,68,68,0.12);
    border-color: rgba(239,68,68,0.35);
    color: #f87171;
  }
  .pdf-btn:hover:not(:disabled) {
    background: rgba(239,68,68,0.22);
    border-color: #ef4444;
    color: #fca5a5;
  }
  .pdf-btn:disabled { opacity: 0.6; cursor: not-allowed; }

  .scenario-btn {
    background: rgba(59,130,246,0.10);
    border-color: rgba(59,130,246,0.35);
    color: #60a5fa;
  }
  .scenario-btn:hover {
    background: rgba(59,130,246,0.22);
    border-color: #3b82f6;
    color: #93c5fd;
  }

  .sensitivity-btn {
    background: rgba(245,158,11,0.10);
    border-color: rgba(245,158,11,0.35);
    color: #fbbf24;
  }
  .sensitivity-btn:hover {
    background: rgba(245,158,11,0.22);
    border-color: #f59e0b;
    color: #fcd34d;
  }

  .phase3b-section {
    padding: 0;
    overflow: hidden;
  }

  .phase3b-section-title {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
  }

  .phase3b-section-hint {
    font-size: 11px;
    font-weight: 400;
    color: var(--text-muted);
    font-style: italic;
  }

  /* Scenario compare table */
  .compare-empty {
    padding: 16px 20px;
    color: var(--text-muted);
    font-size: 13px;
  }

  .compare-table-wrapper {
    overflow-x: auto;
    padding: 4px 12px 12px;
    margin-top: 4px;
  }

  .compare-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 12.5px;
  }

  .compare-table th {
    padding: 8px 10px;
    color: var(--text-muted);
    font-weight: 500;
    font-size: 11px;
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
  }

  .compare-table td {
    padding: 9px 10px;
    border-bottom: 1px solid rgba(148,163,184,0.1);
    vertical-align: middle;
    color: var(--text-main);
  }

  /* Align headers and values per column: scenario=left, numbers/currency=right, action=center */
  .compare-table th:nth-child(1),
  .compare-table td:nth-child(1) { text-align: left; }
  .compare-table th:nth-child(2),
  .compare-table td:nth-child(2),
  .compare-table th:nth-child(3),
  .compare-table td:nth-child(3),
  .compare-table th:nth-child(4),
  .compare-table td:nth-child(4),
  .compare-table th:nth-child(5),
  .compare-table td:nth-child(5) { text-align: right; }
  .compare-table th:nth-child(6),
  .compare-table td:nth-child(6) { text-align: center; }

  .compare-table tr:last-child td { border-bottom: none; }
  .compare-table tr:hover td { background: rgba(148,163,184,0.05); }

  .compare-delete-btn {
    background: none;
    border: 1px solid rgba(239,68,68,0.3);
    border-radius: 5px;
    color: #f87171;
    cursor: pointer;
    font-size: 13px;
    padding: 3px 7px;
    transition: all 0.15s;
  }
  .compare-delete-btn:hover { background: rgba(239,68,68,0.12); border-color: #ef4444; }

  /* Scenario compare tabs */
  .compare-tabs {
    display: flex;
    gap: 6px;
    padding: 12px 16px 0;
    flex-wrap: wrap;
  }

  .compare-tab-btn {
    padding: 5px 14px;
    border-radius: 20px;
    border: 1px solid rgba(148,163,184,0.25);
    background: transparent;
    color: var(--text-muted);
    font-size: 12px;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.15s;
    white-space: nowrap;
  }

  .compare-tab-btn:hover {
    border-color: rgba(148,163,184,0.5);
    color: var(--text-main);
  }

  .compare-tab-btn.active {
    background: var(--accent, #3b82f6);
    border-color: var(--accent, #3b82f6);
    color: #fff;
    font-weight: 500;
  }

  .compare-tab-content {
    padding: 8px 0 0;
  }

  #scenarioEarliestFireCanvas {
    min-height: 200px;
  }

  #compareTabContent-risicoscore {
    height: 440px;
    min-height: 440px;
    display: flex;
    align-items: stretch;
    margin-bottom: 32px;
  }

  #compareTabContent-risicoscore canvas {
    flex: 1;
    min-height: 0;
    max-height: 100%;
  }

  #scenarioRadarCanvas {
    width: 100% !important;
    height: 400px !important;
    max-height: 400px;
  }

  /* === Feature 6: Print Stylesheet === */
  @media print {
    body {
      background: white;
      color: #1e293b;
      height: auto;
      overflow: visible;
      display: block;
      font-size: 12px;
    }

    header {
      background: white;
      border-bottom: 2px solid #1e293b;
      box-shadow: none;
    }

    .header-content h1 {
      -webkit-text-fill-color: #1e293b;
      background: none;
      color: #1e293b;
    }

    .header-content p,
    .header-back,
    #saveBtn,
    .resizer,
    .info-box summary::before,
    .skip-link,
    #wizardModal {
      display: none !important;
    }

    main {
      display: block;
      overflow: visible;
    }

    .drawer-panel {
      display: none !important;
    }

    #outputPanel {
      padding: 0;
      gap: 12px;
      overflow: visible;
    }

    .metric-card,
    .chart-wrapper,
    .scenario-strip,
    .timeline-bar-wrapper,
    .table-wrapper,
    .info-box {
      background: white;
      border: 1px solid #cbd5e1;
      box-shadow: none;
      break-inside: avoid;
    }

    .metric-value { color: #1e293b; }
    .metric-title { color: #64748b; }

    .chart-wrapper {
      height: 280px;
    }

    table {
      font-size: 10px;
    }

    th { color: #64748b; background: #f8fafc; }
    td { color: #1e293b; border-color: #e2e8f0; }

    tr.phase-go-go   { background: #ecfdf5 !important; }
    tr.phase-go-slow { background: #fffbeb !important; }
    tr.phase-no-go   { background: #fef2f2 !important; }
    tr.highlight-fire { background: #ecfdf5 !important; }

    .timeline-bar .phase-segment[data-phase="werken"]  { background: #94a3b8; }
    .timeline-bar .phase-segment[data-phase="go-go"]   { background: #059669; }
    .timeline-bar .phase-segment[data-phase="go-slow"] { background: #d97706; }
    .timeline-bar .phase-segment[data-phase="no-go"]   { background: #dc2626; }
  }

/* Event timeline (Phase 3c) */
.event-timeline-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 10px;
}
.event-timeline-row {
  display: grid;
  grid-template-columns: 1fr 90px 70px auto auto;
  gap: 8px;
  align-items: center;
}
.event-timeline-row .event-name { min-width: 0; }

/* Drawer: fit event row in limited width */
.drawer-panel .event-timeline-row {
  grid-template-columns: minmax(0, 1fr) 72px 56px auto auto;
  gap: 6px;
}
.drawer-panel .event-timeline-row .event-amount,
.drawer-panel .event-timeline-row .event-years {
  font-size: 12px;
  padding: 5px 6px;
}

.event-timeline-row .event-amount,
.event-timeline-row .event-years {
  width: 100%;
  padding: 6px 8px;
  font-size: 13px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background: var(--bg-input);
  color: var(--text-main);
}
.event-taxable-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-muted);
  white-space: nowrap;
}
.event-remove {
  padding: 4px 10px;
  font-size: 18px;
  line-height: 1;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-muted);
  cursor: pointer;
}
.event-remove:hover {
  background: var(--danger, #ef4444);
  color: #fff;
  border-color: var(--danger, #ef4444);
}
.add-event-btn {
  margin-top: 4px;
  margin-bottom: 16px;
  padding: 8px 14px;
  font-size: 13px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-main);
  cursor: pointer;
}
.add-event-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}
@media (max-width: 600px) {
  .event-timeline-row {
    grid-template-columns: 1fr 1fr;
  }
  .event-timeline-row .event-remove { grid-column: 2; }
}

/* ============================================================
   Panel close button & toolbar active state (all panels)
   ============================================================ */
.panel-close-btn {
  margin-left: auto;
  padding: 2px 8px;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-muted);
  font-size: 13px;
  line-height: 1;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
  flex-shrink: 0;
}
.panel-close-btn:hover {
  background: rgba(239,68,68,0.1);
  border-color: rgba(239,68,68,0.5);
  color: #ef4444;
}
.phase3b-btn.active {
  box-shadow: inset 0 0 0 2px currentColor;
  opacity: 0.85;
}

/* ============================================================
   Phase 3d — panel height overrides (chart-wrapper is 400px fixed)
   ============================================================ */
#backtestWrapper,
#optimizerWrapper,
#sensitivityChartWrapper {
  height: auto;
  overflow: visible;
}

.sensitivity-chart-legend {
  margin: 8px 0 0;
  padding: 0;
  font-size: 0.8125rem;
  color: var(--muted, #64748b);
  line-height: 1.4;
}

/* Fixed-height container for sensitivity & backtest so charts don't grow infinitely */
.chart-canvas-container.chart-canvas-fixed {
  height: 380px;
  max-height: 380px;
  position: relative;
  width: 100%;
  overflow: hidden;
}
.chart-canvas-container.chart-canvas-fixed canvas {
  max-height: 380px;
}

/* ============================================================
   Phase 3d — Backtesting & Optimizer buttons
   ============================================================ */
.backtest-btn {
  background: var(--bg-input);
  border-color: var(--border-color);
  color: var(--text-main);
}
.backtest-btn:hover {
  border-color: #6366f1;
  color: #6366f1;
  background: rgba(99,102,241,0.07);
}
.optimizer-btn {
  background: var(--bg-input);
  border-color: var(--border-color);
  color: var(--text-main);
}
.optimizer-btn:hover {
  border-color: #f59e0b;
  color: #f59e0b;
  background: rgba(245,158,11,0.07);
}
  .optimizer-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Premium-locked state for PDF / Scenario / Gevoeligheid / Backtest / Optimizer buttons */
.phase3b-btn.premium-locked {
  opacity: 0.6;
  cursor: pointer;
}
.phase3b-btn.premium-locked:hover {
  opacity: 0.75;
}

/* Backtesting panel */
.backtest-summary {
  margin-bottom: 12px;
}
.backtest-summary-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 6px;
}
.backtest-summary-label {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 500;
}
.backtest-rate-badge {
  display: inline-block;
  padding: 3px 12px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.backtest-rate-badge.success {
  background: rgba(16,185,129,0.15);
  color: #10b981;
}
.backtest-rate-badge.warning {
  background: rgba(245,158,11,0.15);
  color: #f59e0b;
}
.backtest-rate-badge.danger {
  background: rgba(239,68,68,0.12);
  color: #ef4444;
}
.backtest-desc {
  margin: 4px 0 2px;
  font-size: 13px;
  color: var(--text-main);
}
.backtest-disclaimer {
  margin: 2px 0 8px;
  font-style: italic;
  color: var(--text-muted) !important;
}

/* Optimizer chart — fixed height, not 400px like .chart-wrapper */
#optimizerChartCanvas {
  height: 220px !important;
  max-height: 220px !important;
}

/* Optimizer panel */
.optimizer-table-wrapper {
  overflow-x: auto;
  margin-top: 16px;
}
.optimizer-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  white-space: normal;
}
.optimizer-table thead {
  position: static;
  background: var(--bg-alt, var(--bg-main));
}
.optimizer-table th {
  text-align: right;
  padding: 8px 10px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  background: var(--bg-alt, var(--bg-main));
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}
.optimizer-table th:first-child {
  text-align: left;
}
.optimizer-table td {
  text-align: right;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-main);
  vertical-align: middle;
}
.optimizer-table td:first-child {
  text-align: left;
}
.optimizer-table tr:last-child td { border-bottom: none; }
.optimizer-best-row td {
  background: rgba(99,102,241,0.05);
  font-weight: 600;
}
.optimizer-best-badge {
  display: inline-block;
  margin-left: 6px;
  padding: 1px 7px;
  border-radius: 999px;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background: rgba(99,102,241,0.15);
  color: #6366f1;
  vertical-align: middle;
}
.optimizer-rate {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
}
.optimizer-rate.success { background: rgba(16,185,129,0.12); color: #10b981; }
.optimizer-rate.warning { background: rgba(245,158,11,0.12); color: #f59e0b; }
.optimizer-rate.danger  { background: rgba(239,68,68,0.10);  color: #ef4444; }

/* Waterfall Chart Section — follows theme via CSS variables. Disabled (hidden) but kept in DOM. */
.waterfall-section {
  display: none; /* Disabled: adds little value; re-enable by removing this line */
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 16px;
  margin-top: 16px;
}
#waterfallYearSelect {
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  color: var(--text-main);
}

/* Task 4: Micro-interactions and Transitions */

/* Input validation glow */
@keyframes validPulse {
  0% { box-shadow: 0 0 0 0 rgba(76, 175, 80, 0.7); }
  70% { box-shadow: 0 0 0 10px rgba(76, 175, 80, 0); }
  100% { box-shadow: 0 0 0 0 rgba(76, 175, 80, 0); }
}

.valid-pulse {
  animation: validPulse 1s ease-out;
  border-color: #4CAF50 !important;
}

@keyframes invalidShake {
  0%, 100% { transform: translateX(0); }
  10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
  20%, 40%, 60%, 80% { transform: translateX(5px); }
}

.invalid-shake {
  animation: invalidShake 0.6s cubic-bezier(.36,.07,.19,.97) both;
  border-color: #F44336 !important;
}

/* Scroll-triggered fade-in */
.fade-in-section {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
  will-change: opacity, visibility;
}

.fade-in-section.is-visible {
  opacity: 1;
  transform: none;
}