/* --- THEME AND GLOBAL STYLES --- */
:root {
  --font-family-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --border-radius: 0.5rem;
  --transition: all 0.2s ease-in-out;
}

body.light-theme {
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --secondary: #6366f1;
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --text-primary: #111827;
  --text-secondary: #4b5563;
  --text-light: #6b7280;
  --bg-primary: #f9fafb;
  --bg-secondary: #ffffff;
  --border-color: #e5e7eb;
  --input-bg: #ffffff;
  
  /* Additional variables for dark theme compatibility */
  --card-bg: #ffffff;
  --text-color: #333333;
  --muted-text: #666666;
  --light-bg: #f8f9fa;
  --info-text: #0c5460;
  --info-bg-light: #d1ecf1;
  --info-bg: #e7f3ff;
  --info-border: #007bff;
  --text-muted: #666666;
  --secondary-bg: #f8f9fa;
  --warning-bg: #fff3cd;
  --warning-border: #ffeaa7;
}

body.dark-theme {
  --primary: #60a5fa;
  --primary-hover: #3b82f6;
  --secondary: #818cf8;
  --danger: #f87171;
  --danger-hover: #ef4444;
  --text-primary: #f9fafb;
  --text-secondary: #d1d5db;
  --text-light: #9ca3af;
  --bg-primary: #111827;
  --bg-secondary: #1f2937;
  --border-color: #374151;
  --input-bg: #374151;
  
  /* Additional variables for dark theme compatibility */
  --card-bg: #1f2937;
  --text-color: #f9fafb;
  --muted-text: #9ca3af;
  --light-bg: #374151;
  --info-text: #bfdbfe;
  --info-bg-light: #1e3a8a;
  --info-bg: #1e3a8a;
  --info-border: #3b82f6;
  --text-muted: #9ca3af;
  --secondary-bg: #374151;
  --warning-bg: #451a03;
  --warning-border: #92400e;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  transition: background-color 0.3s, color 0.3s;
}

/* --- LAYOUT --- */
.app-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 2rem;
}

.header-content h1 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
}

.header-content p {
  font-size: 1rem;
  color: var(--text-secondary);
}

.app-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem;
  border: 1px solid transparent;
  border-radius: 0.375rem;
  background-color: transparent;
  color: var(--text-light);
  cursor: pointer;
  transition: var(--transition);
}

.btn-icon:hover {
  background-color: var(--bg-primary);
  color: var(--text-primary);
}

.main-content {
  display: grid;
  grid-template-columns: 420px 1fr;
  gap: 2rem;
  align-items: start;
}

.input-column {
  position: sticky;
  top: 1.5rem;
  height: calc(100vh - 3rem);
  overflow-y: auto;
}

.output-column {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* --- CARD STYLES --- */
.card {
  background-color: var(--bg-secondary);
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow);
  padding: 1.5rem;
  transition: var(--transition);
}

.card:not(:last-child) {
  margin-bottom: 1.5rem;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.card-header h2 {
  margin: 0;
}

.enhanced-features-status {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

.enhanced-features-indicator {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background-color: var(--primary);
  color: white;
  border-radius: var(--border-radius);
  font-size: 0.9rem;
  font-weight: 600;
}

.status-icon {
  font-size: 1.1rem;
}

.status-text {
  flex: 1;
}

.chart-card, .results-card {
  height: auto;
}

/* --- FORM STYLES --- */
.form-section {
  margin-bottom: 1.5rem;
}
.form-section:last-child {
  margin-bottom: 0;
}

.form-section h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-field {
  display: flex;
  flex-direction: column;
}

label {
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
}

input[type="number"],
input[type="text"] {
  width: 100%;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 0.375rem;
  background-color: var(--input-bg);
  color: var(--text-primary);
  font-size: 1rem;
  transition: var(--transition);
}

input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

input[readonly] {
  background-color: var(--bg-primary);
  cursor: not-allowed;
}

/* --- BUTTONS --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1.2rem;
  border: 1px solid transparent;
  border-radius: 0.375rem;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}
.btn-primary:hover {
  background-color: var(--primary-hover);
}

.btn-secondary {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border-color: var(--border-color);
}
.btn-secondary:hover {
  background-color: var(--bg-primary);
}

.btn-danger {
  background-color: transparent;
  color: var(--danger);
  border: 1px solid var(--danger);
}
.btn-danger:hover {
  background-color: var(--danger);
  color: #ffffff;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.form-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 1rem;
}

/* --- MODE SELECTOR --- */
.mode-selector {
  display: flex;
  width: 100%;
  background-color: var(--bg-primary);
  border-radius: 0.5rem;
  padding: 0.25rem;
  margin-bottom: 1.5rem;
}

.mode-btn {
  flex: 1;
  padding: 0.5rem 0;
  border: none;
  border-radius: 0.375rem;
  background-color: transparent;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.mode-btn.active {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

/* Accordion for Advanced Settings */
details {
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  margin-bottom: 1.5rem;
  background-color: var(--bg-primary);
}

summary {
  padding: 1rem;
  cursor: pointer;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition);
}

summary:hover {
  background-color: var(--bg-secondary);
}

details[open] > summary {
  border-bottom: 1px solid var(--border-color);
}

details > .form-grid {
  padding: 1rem;
}

summary::after {
  content: '▶';
  font-size: 0.8em;
  transition: transform 0.2s;
  transform-origin: center;
}

details[open] > summary::after {
  transform: rotate(90deg);
}

/* --- TOAST NOTIFICATIONS --- */
#toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.5rem;
}

.toast {
  background-color: var(--text-primary);
  color: var(--bg-primary);
  padding: 0.75rem 1.25rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.5s ease;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}


/* --- SCENARIOS LIST --- */
.scenarios-container {
  margin-top: 1.5rem;
}
.scenarios-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1rem;
  max-height: 200px;
  overflow-y: auto;
}

.scenario-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1rem;
  background-color: var(--bg-primary);
  border-radius: 0.375rem;
  border: 1px solid var(--border-color);
}

.scenario-item button {
  background: none;
  border: none;
  color: var(--text-light);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 0.25rem;
  border-radius: 50%;
  line-height: 1;
}
.scenario-item button:hover {
  color: var(--danger);
  background-color: rgba(239, 71, 111, 0.1);
}

.scenario-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Legacy age-input styles - now using .age-input-custom in enhanced-features.css */
.age-input {
  width: 60px;
  padding: 0.25rem;
  font-size: 0.9rem;
}

/* Enhanced editing styles for scenarios */
.scenario-item.editing {
  flex-direction: column;
  align-items: stretch;
  padding: 1rem;
  background-color: var(--bg-secondary);
  border: 2px solid var(--primary);
}

.edit-scenario-inputs {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.edit-row {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.edit-row label {
  font-weight: 500;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.edit-row input,
.edit-row select {
  padding: 0.5rem;
  border: 1px solid var(--border-color);
  border-radius: 0.375rem;
  background-color: var(--input-bg);
  color: var(--text-primary);
  font-size: 0.875rem;
  transition: var(--transition);
}

.edit-row input:focus,
.edit-row select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.scenario-item.editing .scenario-actions {
  margin-top: 1rem;
  justify-content: flex-end;
  gap: 0.75rem;
}

.scenario-item.editing .btn-save,
.scenario-item.editing .btn-cancel {
  padding: 0.5rem 1rem;
  border-radius: 0.375rem;
  font-size: 1rem;
  font-weight: 500;
  transition: var(--transition);
}

.scenario-item.editing .btn-save {
  background-color: var(--primary);
  color: white;
  border: 1px solid var(--primary);
}

.scenario-item.editing .btn-save:hover {
  background-color: var(--primary-hover);
}

.scenario-item.editing .btn-cancel {
  background-color: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.scenario-item.editing .btn-cancel:hover {
  background-color: var(--bg-primary);
  color: var(--text-primary);
}

/* Edit form styles */
.edit-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  width: 100%;
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-row label {
  font-weight: 500;
  font-size: 0.875rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.form-row input,
.form-row select {
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 0.375rem;
  background-color: var(--input-bg);
  color: var(--text-primary);
  font-size: 0.875rem;
  transition: var(--transition);
}

.form-row input:focus,
.form-row select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.age-input-group {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.age-years,
.age-months {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  flex: 1;
}

.age-years input,
.age-months input {
  max-width: 80px;
}

.age-years small,
.age-months small {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-align: center;
}

.pension-option-fields {
  margin-top: 0.5rem;
}

/* --- CHART & RESULTS --- */
.chart-container {
  position: relative;
  height: 450px;
}

.results-card h2 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.results-summary {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.result-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border-color);
}
.result-item:last-child {
  border-bottom: none;
}

.result-label {
  color: var(--text-secondary);
}

.result-value {
  font-weight: 600;
  color: var(--text-primary);
}
.result-value.better {
  color: #10b981;
}

.info-text {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--text-light);
  border: 2px dashed var(--border-color);
  border-radius: var(--border-radius);
}

.info-banner {
  background-color: var(--primary);
  color: white;
  padding: 0.75rem 1rem;
  border-radius: 0.375rem;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
}

/* --- FOOTER --- */
.app-footer {
  text-align: center;
  padding: 2rem 0;
  margin-top: 2rem;
  color: var(--text-light);
  font-size: 0.9rem;
  border-top: 1px solid var(--border-color);
}

/* --- MODAL --- */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgba(0,0,0,0.4);
}

/* Ensure clear data modal has proper layering */
#clear-data-modal {
  z-index: 1001 !important;
}

.modal-content {
  background-color: var(--bg-secondary);
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  padding: 0;
  border: 1px solid var(--border-color);
  width: 80%;
  max-width: 600px;
  max-height: 90vh;
  border-radius: var(--border-radius);
  animation: animatetop 0.4s;
  display: flex;
  flex-direction: column;
}

@keyframes animatetop {
  from {transform: translate(-50%, -50%) scale(0.8); opacity: 0}
  to {transform: translate(-50%, -50%) scale(1); opacity: 1}
}

.close-button {
  color: var(--text-light);
  float: right;
  font-size: 28px;
  font-weight: bold;
}

.close-button:hover,
.close-button:focus {
  color: var(--text-primary);
  text-decoration: none;
  cursor: pointer;
}

/* Clear Data Modal Styles */
#clear-data-modal .modal-content {
  max-width: 500px;
  padding: 2rem;
  /* Ensure proper centering */
  position: fixed !important;
  top: 50% !important;
  left: 50% !important;
  transform: translate(-50%, -50%) !important;
  margin: 0 !important;
}

#clear-data-modal h2 {
  color: var(--danger);
  margin-bottom: 1rem;
}

#clear-data-modal p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  line-height: 1.6;
}

.modal-actions {
  display: flex;
  gap: 1rem;
  justify-content: flex-end;
  margin-top: 2rem;
}

.modal-actions .btn {
  min-width: 120px;
}

/* Mobile responsiveness for clear data modal */
@media (max-width: 768px) {
  #clear-data-modal .modal-content {
    width: 90% !important;
    max-width: 90% !important;
    padding: 1.5rem !important;
  }
  
  .modal-actions {
    flex-direction: column;
    gap: 0.5rem;
  }
  
  .modal-actions .btn {
    width: 100%;
    min-width: auto;
  }
}

/* --- RESPONSIVE DESIGN --- */
@media (max-width: 1200px) {
  .main-content {
    grid-template-columns: 380px 1fr;
  }
}

@media (max-width: 992px) {
  .main-content {
    grid-template-columns: 1fr;
  }
  .input-column {
    position: static;
    height: auto;
    overflow-y: visible;
  }
}

@media (max-width: 768px) {
  .app-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
  .form-grid {
    grid-template-columns: 1fr;
  }
}

/* Dark theme compatibility for analysis cards */
.crossover-analysis-summary,
.strategic-insights,
.calculation-params-indicator,
.tax-rate-indicator {
  background: var(--card-bg) !important;
  color: var(--text-color) !important;
  border: 1px solid var(--border-color) !important;
}

.crossover-analysis-summary h3,
.crossover-analysis-summary h4,
.strategic-insights h3,
.strategic-insights h4,
.calculation-params-indicator h3,
.calculation-params-indicator h4,
.tax-rate-indicator h3,
.tax-rate-indicator h4 {
  color: var(--text-color) !important;
}

.crossover-analysis-summary div,
.strategic-insights div,
.calculation-params-indicator div,
.tax-rate-indicator div {
  color: var(--text-color) !important;
}

/* Fix explanation boxes inside crossover analysis */
.crossover-analysis-summary div[style*="background: var(--light-bg"] {
  background: var(--light-bg) !important;
  color: var(--text-color) !important;
}

.crossover-analysis-summary div[style*="background: var(--info-bg-light"] {
  background: var(--info-bg-light) !important;
  color: var(--info-text) !important;
}

.crossover-analysis-summary div[style*="background: var(--info-bg"] {
  background: var(--info-bg) !important;
  color: var(--text-color) !important;
}

.crossover-analysis-summary div[style*="background: var(--secondary-bg"] {
  background: var(--secondary-bg) !important;
  color: var(--text-color) !important;
}

.crossover-analysis-summary div[style*="background: var(--warning-bg"] {
  background: var(--warning-bg) !important;
  color: var(--text-color) !important;
}

.crossover-analysis-summary div[style*="color: var(--text-muted"] {
  color: var(--text-muted) !important;
}

/* ===== Phase 1 UX Improvements: Enhanced Crossover Analysis ===== */

/* Visual Hierarchy & Color Coding */
.crossover-analysis-enhanced {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.5rem;
  margin: 1.5rem 0;
  box-shadow: var(--shadow);
  position: relative;
}

.crossover-analysis-enhanced::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: 12px 12px 0 0;
}

/* Section Headers with improved typography */
.crossover-section-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--border-color);
  position: relative;
}

.crossover-section-header .icon {
  font-size: 1.5rem;
  line-height: 1;
}

.crossover-section-header h3 {
  margin: 0;
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.2;
}

.crossover-section-header h4 {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.2;
}

/* Best Recommendation Card */
.best-recommendation-card {
  background: linear-gradient(135deg, #d4edda 0%, #c3e6cb 100%);
  border: 1px solid #c3e6cb;
  border-radius: 10px;
  padding: 1.25rem;
  margin-bottom: 1.5rem;
  position: relative;
  overflow: visible;
}

body.dark-theme .best-recommendation-card {
  background: linear-gradient(135deg, #1e3a33 0%, #2d5a4d 100%);
  border-color: #2d5a4d;
}

.best-recommendation-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 6px;
  height: 100%;
  background: linear-gradient(180deg, #28a745, #20c997);
}

.recommendation-content {
  display: flex;
  align-items: center;
  gap: 1rem;
  position: relative;
}

.recommendation-icon {
  font-size: 2rem;
  background: rgba(40, 167, 69, 0.1);
  padding: 0.75rem;
  border-radius: 50%;
  line-height: 1;
}

.recommendation-text {
  flex: 1;
  font-size: 1.1rem;
  font-weight: 600;
  color: #155724;
  line-height: 1.3;
}

body.dark-theme .recommendation-text {
  color: #a3cfbb;
}

.recommendation-value {
  font-size: 1.3rem;
  font-weight: 700;
  color: #28a745;
  margin: 0.25rem 0;
}

body.dark-theme .recommendation-value {
  color: #20c997;
}

/* Crossover Comparison Cards */
.crossover-comparisons {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.5rem;
  min-height: auto;
  overflow: visible;
}

.crossover-comparison-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem;
  transition: var(--transition);
  position: relative;
}

.crossover-comparison-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.crossover-comparison-card.has-crossover {
  border-left: 4px solid var(--primary);
}

.crossover-comparison-card.no-crossover {
  border-left: 4px solid var(--text-light);
}

.crossover-comparison-card.early-advantage {
  border-left: 4px solid #28a745;
}

.comparison-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.ages-comparison {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  color: var(--text-primary);
}

.vs-separator {
  color: var(--text-light);
  font-weight: normal;
}

.crossover-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 500;
}

.crossover-status.exists {
  background: rgba(59, 130, 246, 0.1);
  color: var(--primary);
  border: 1px solid rgba(59, 130, 246, 0.2);
}

.crossover-status.none {
  background: rgba(107, 114, 128, 0.1);
  color: var(--text-light);
  border: 1px solid rgba(107, 114, 128, 0.2);
}

.crossover-status.early {
  background: rgba(40, 167, 69, 0.1);
  color: #28a745;
  border: 1px solid rgba(40, 167, 69, 0.2);
}

.comparison-details {
  color: var(--text-secondary);
  line-height: 1.4;
}

.financial-highlight {
  font-weight: 600;
  color: var(--primary);
}

/* Collapsible Details */
.collapsible-section {
  border-top: 1px solid var(--border-color);
  margin-top: 1rem;
}

.collapsible-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 0;
  cursor: pointer;
  user-select: none;
  transition: var(--transition);
}

.collapsible-header:hover {
  color: var(--primary);
}

.collapsible-toggle {
  font-size: 1.2rem;
  transition: transform 0.3s ease;
  color: var(--text-light);
}

.collapsible-section.expanded .collapsible-toggle {
  transform: rotate(180deg);
  color: var(--primary) !important;
}

/* Debug: Visual indicator of expanded state */
.collapsible-section.expanded {
  border-left: 4px solid var(--primary);
}

.collapsible-content {
  display: none !important;
  visibility: hidden !important;
  opacity: 0 !important;
  height: 0 !important;
  overflow: hidden !important;
}

.collapsible-section.expanded .collapsible-content {
  display: block !important;
  visibility: visible !important;
  opacity: 1 !important;
  height: auto !important;
}

@keyframes expandContent {
  0% {
    opacity: 0;
    transform: translateY(-10px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Strategic Insights Enhanced */
.strategic-insights-enhanced {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 1.25rem;
  margin: 1.5rem 0;
}

.insight-card {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem;
  border-radius: 8px;
  margin: 0.75rem 0;
  transition: var(--transition);
}

.insight-card.success {
  background: rgba(40, 167, 69, 0.05);
  border: 1px solid rgba(40, 167, 69, 0.2);
}

.insight-card.warning {
  background: rgba(255, 193, 7, 0.05);
  border: 1px solid rgba(255, 193, 7, 0.2);
}

.insight-card.info {
  background: rgba(59, 130, 246, 0.05);
  border: 1px solid rgba(59, 130, 246, 0.2);
}

.insight-icon {
  font-size: 1.5rem;
  line-height: 1;
  margin-top: 0.1rem;
}

.insight-content {
  flex: 1;
  line-height: 1.4;
}

.insight-title {
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

/* Quick Takeaways */
.quick-takeaways {
  background: var(--light-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.25rem;
  margin: 1rem 0;
}

.takeaway-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.takeaway-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.takeaway-item:last-child {
  border-bottom: none;
}

body.dark-theme .takeaway-item {
  border-bottom-color: rgba(255, 255, 255, 0.05);
}

.takeaway-icon {
  font-size: 1.1rem;
  line-height: 1;
  margin-top: 0.1rem;
  color: var(--primary);
}

.takeaway-text {
  flex: 1;
  line-height: 1.3;
  color: var(--text-primary);
}

/* Enhanced Data Presentation */
.data-highlight {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(99, 102, 241, 0.05));
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  border: 1px solid rgba(59, 130, 246, 0.2);
  font-weight: 600;
  color: var(--primary);
  display: inline-block;
  margin: 0.25rem;
}

.currency-highlight {
  font-weight: 700;
  color: #28a745;
  font-size: 1.1em;
}

body.dark-theme .currency-highlight {
  color: #20c997;
}

.age-highlight {
  font-weight: 600;
  color: var(--primary);
  background: rgba(59, 130, 246, 0.1);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-size: 0.9em;
}

/* Mobile Optimizations - Enhanced Accordion Experience */
@media (max-width: 768px) {
  .crossover-analysis-enhanced {
    padding: 1rem;
    margin: 1rem 0;
  }
  
  .crossover-section-header {
    flex-direction: row;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
  }
  
  .crossover-section-header .icon {
    font-size: 1.4rem;
  }
  
  /* Enhanced collapsible headers for mobile */
  .collapsible-header {
    padding: 1rem 0.75rem;
    margin: 0 -1rem;
    border-radius: 8px;
    background: var(--light-bg);
    border: 1px solid var(--border-color);
    margin-bottom: 0.5rem;
    position: relative;
    min-height: 48px; /* Minimum touch target size */
  }
  
  .collapsible-header:active {
    background: var(--bg-secondary);
    transform: scale(0.98);
  }
  
  .collapsible-toggle {
    font-size: 1.4rem;
    color: var(--primary);
    font-weight: bold;
  }
  
  /* Improved recommendation card for mobile */
  .recommendation-content {
    flex-direction: column;
    text-align: center;
    gap: 1rem;
    padding: 1rem;
  }
  
  .recommendation-icon {
    align-self: center;
  }
  
  .recommendation-value {
    font-size: 1.5rem;
  }
  
  /* Better comparison cards for mobile */
  .crossover-comparison-card {
    padding: 1rem;
    margin-bottom: 0.75rem;
  }
  
  .comparison-header {
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
  }
  
  .ages-comparison {
    font-size: 1.1rem;
    justify-content: center;
    padding: 0.5rem;
    background: var(--light-bg);
    border-radius: 6px;
  }
  
  .crossover-status {
    align-self: center;
    padding: 0.5rem 1rem;
    font-size: 1rem;
  }
  
  /* Enhanced insight cards for mobile */
  .insight-card {
    flex-direction: column;
    text-align: center;
    gap: 0.75rem;
    padding: 1.25rem;
  }
  
  .insight-icon {
    font-size: 2rem;
    align-self: center;
  }
  
  /* Mobile-optimized takeaways */
  .takeaway-item {
    padding: 0.75rem 0;
    align-items: center;
    text-align: left;
  }
  
  .takeaway-icon {
    font-size: 1.2rem;
    color: var(--primary);
    margin-right: 0.5rem;
  }
  
  /* Data highlights and currency values */
  .data-highlight {
    display: block;
    margin: 0.75rem 0;
    text-align: center;
    padding: 0.75rem 1rem;
    font-size: 1rem;
  }
  
  .currency-highlight {
    font-size: 1.2em;
    display: block;
    margin: 0.5rem 0;
  }
  
  .age-highlight {
    font-size: 1rem;
    padding: 0.5rem 0.75rem;
    display: inline-block;
    margin: 0.25rem;
  }
  
  /* On mobile, ensure non-expanded sections are properly hidden (but don't interfere with display:none/block logic) */
  .collapsible-section:not(.expanded) .collapsible-content {
    max-height: 0 !important;
    padding: 0 !important;
    overflow: hidden !important;
  }
  
  /* But make sure expanded sections work properly */
  .collapsible-section.expanded .collapsible-content {
    display: block !important;
    max-height: none !important;
    padding: 1rem 0 !important;
    overflow: visible !important;
  }
  
  /* Quick takeaways should stay expanded */
  .quick-takeaways .collapsible-content {
    max-height: none !important;
    padding: 0 !important;
    overflow: visible !important;
  }
  
  /* Mobile tooltip adjustments */
  .tooltip .tooltip-content {
    width: 90vw;
    max-width: 320px;
    font-size: 0.8rem;
    /* Fixed positioning handled by JavaScript */
  }
}

/* Tooltip System for Enhanced UX */
.tooltip {
  position: relative;
  display: inline-block;
  border-bottom: 1px dotted var(--primary);
  cursor: help;
  color: var(--primary);
  font-weight: 500;
}

/* Ensure tooltip containers have proper positioning context for absolute positioning */
.crossover-analysis-enhanced,
.best-recommendation-card,
.crossover-section-header {
  position: relative;
}

.tooltip .tooltip-content {
  visibility: hidden;
  width: 300px;
  max-width: 90vw;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  text-align: left;
  border-radius: 8px;
  padding: 1rem;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  position: fixed;
  z-index: 10000;
  opacity: 0;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  font-size: 0.875rem;
  line-height: 1.4;
  font-weight: normal;
  pointer-events: none;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

/* Tooltip arrow removed for fixed positioning */

/* Simple, reliable tooltip hover states */
.tooltip:hover .tooltip-content {
  visibility: visible !important;
  opacity: 1 !important;
}


/* Mobile tooltip adjustments */
@media (max-width: 768px) {
  .tooltip .tooltip-content {
    width: 240px;
    margin-left: -120px;
    font-size: 0.8rem;
  }
  
  /* On mobile, show tooltips on tap */
  .tooltip:active .tooltip-content {
    visibility: visible;
    opacity: 1;
  }
}

/* ====== PHASE 2: ENHANCED DATA PRESENTATION ====== */

/* Tabbed Interface for Content Organization */
.analysis-tabs {
  margin: 1.5rem 0;
}

.tab-nav {
  display: flex;
  border-bottom: 2px solid var(--border-color);
  margin-bottom: 1rem;
  overflow-x: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border-color) transparent;
}

.tab-nav::-webkit-scrollbar {
  height: 4px;
}

.tab-nav::-webkit-scrollbar-track {
  background: transparent;
}

.tab-nav::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 2px;
}

.tab-button {
  flex: 1;
  min-width: 140px;
  padding: 0.75rem 1rem;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  position: relative;
  transition: var(--transition);
  white-space: nowrap;
}

.tab-button:hover {
  color: var(--primary);
  background: var(--light-bg);
}

.tab-button.active {
  color: var(--primary);
  font-weight: 600;
}

.tab-button.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--primary);
}

.tab-content {
  display: none;
  animation: fadeIn 0.2s ease-in-out;
}

.tab-content.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Enhanced Data Cards */
.data-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
  margin: 1rem 0;
}

.data-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.data-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-1px);
}

.data-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
}

.data-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.data-card-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.data-card-icon {
  font-size: 1.1rem;
}

.data-card-badge {
  background: var(--primary);
  color: white;
  font-size: 0.75rem;
  padding: 0.25rem 0.5rem;
  border-radius: 12px;
  font-weight: 500;
}

.data-card-badge.best {
  background: var(--primary);
}

.data-card-badge.good {
  background: #10b981;
}

.data-card-badge.fair {
  background: #f59e0b;
}

.data-card-badge.poor {
  background: var(--danger);
}

.data-card-content {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.data-metric {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.data-metric-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.data-metric-value {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.data-metric-value.currency {
  color: var(--primary);
}

.data-metric-value.percentage {
  font-size: 0.9rem;
}

.data-metric-value.age {
  color: var(--secondary);
}

/* Visual Progress Indicators */
.progress-bar {
  width: 100%;
  height: 6px;
  background: var(--light-bg);
  border-radius: 3px;
  overflow: hidden;
  margin: 0.5rem 0;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: 3px;
  transition: width 0.3s ease;
}

.progress-indicator {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0.75rem 0;
}

.progress-icon {
  font-size: 1.1rem;
}

.progress-text {
  flex: 1;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.progress-percentage {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary);
}

/* Enhanced Comparison Tables */
.comparison-table-container {
  overflow-x: auto;
  margin: 1rem 0;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  background: var(--card-bg);
}

.comparison-table thead {
  background: var(--light-bg);
}

.comparison-table th {
  padding: 1rem 0.75rem;
  text-align: center;
  font-weight: 600;
  color: var(--text-primary);
  border-bottom: 2px solid var(--border-color);
  white-space: nowrap;
}

.comparison-table th:first-child {
  text-align: center;
}

.comparison-table th:first-child {
  position: sticky;
  left: 0;
  background: var(--light-bg);
  z-index: 1;
}

.comparison-table td {
  padding: 0.875rem 0.75rem;
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
  text-align: center;
}

.comparison-table td:first-child {
  position: sticky;
  left: 0;
  background: var(--card-bg);
  font-weight: 500;
  color: var(--text-primary);
  z-index: 1;
  text-align: center;
}

.comparison-table tbody tr:hover {
  background: var(--light-bg);
}

.comparison-table tbody tr:hover td:first-child {
  background: var(--light-bg);
}

/* Ensure best-cell styling works with sticky first column */
.comparison-table .best-cell:first-child {
  background: rgba(59, 130, 246, 0.1);
}

.comparison-table tbody tr:hover .best-cell:first-child {
  background: rgba(59, 130, 246, 0.15);
}

.comparison-table .currency-cell {
  color: var(--primary);
  font-weight: 600;
  text-align: center;
}

.comparison-table .age-cell {
  color: var(--secondary);
  font-weight: 500;
  text-align: center;
}

.comparison-table .best-cell {
  background: rgba(59, 130, 246, 0.1);
  font-weight: 600;
}

/* Loading States */
.loading-skeleton {
  background: linear-gradient(90deg, var(--light-bg) 25%, rgba(255,255,255,0.2) 50%, var(--light-bg) 75%);
  background-size: 200% 100%;
  animation: loading 1.5s infinite;
  border-radius: 4px;
}

@keyframes loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.skeleton-card {
  height: 200px;
  border-radius: 8px;
}

.skeleton-text {
  height: 1rem;
  margin: 0.5rem 0;
}

.skeleton-text.title {
  height: 1.25rem;
  width: 60%;
}

.skeleton-text.subtitle {
  height: 0.875rem;
  width: 80%;
}

.skeleton-button {
  height: 2.5rem;
  width: 120px;
  border-radius: 6px;
}

/* Loading Overlay */
.loading-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  border-radius: 8px;
}

.dark-theme .loading-overlay {
  background: rgba(31, 41, 55, 0.8);
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-color);
  border-top: 3px solid var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Mobile Optimizations for Phase 2 Components */
@media (max-width: 768px) {
  .data-card-grid {
    grid-template-columns: 1fr;
  }
  
  .tab-nav {
    gap: 0;
  }
  
  .tab-button {
    min-width: 100px;
    font-size: 0.8rem;
    padding: 0.6rem 0.75rem;
  }
  
  .data-card {
    padding: 1rem;
  }
  
  .data-card-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
  
  .comparison-table {
    font-size: 0.8rem;
  }
  
  .comparison-table th,
  .comparison-table td {
    padding: 0.6rem 0.4rem;
  }
  
  /* Improved mobile table layout for 4 columns */
  .comparison-table th:nth-child(2),
  .comparison-table td:nth-child(2),
  .comparison-table th:nth-child(3),
  .comparison-table td:nth-child(3),
  .comparison-table th:nth-child(4),
  .comparison-table td:nth-child(4) {
    font-size: 0.75rem;
    padding: 0.6rem 0.25rem;
    text-align: center;
  }
}

/* ====== WHAT-IF ANALYSIS UX IMPROVEMENTS ====== */

/* Calculation Source Indicators */
.calculation-source-indicator {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
  margin: 0.25rem 0;
  transition: var(--transition);
}

.calculation-source-indicator.whatif-active {
  background: rgba(99, 102, 241, 0.1);
  color: var(--secondary);
  border: 1px solid rgba(99, 102, 241, 0.3);
}

.calculation-source-indicator.base-scenario {
  background: rgba(59, 130, 246, 0.1);
  color: var(--primary);
  border: 1px solid rgba(59, 130, 246, 0.2);
}

.calculation-source-indicator .icon {
  font-size: 0.9rem;
}

/* What-If Status Badge */
.whatif-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.8rem;
  border-radius: 16px;
  font-size: 0.85rem;
  font-weight: 600;
  margin: 0.5rem 0;
  transition: var(--transition);
  position: relative;
}

.whatif-status-badge.active {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.15), rgba(99, 102, 241, 0.05));
  color: var(--secondary);
  border: 1px solid rgba(99, 102, 241, 0.3);
  box-shadow: 0 2px 4px rgba(99, 102, 241, 0.1);
}

.whatif-status-badge.inactive {
  background: rgba(107, 114, 128, 0.08);
  color: var(--text-light);
  border: 1px solid rgba(107, 114, 128, 0.15);
}

.whatif-status-badge .pulse-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.9); }
}

/* Parameter Comparison Table */
.parameter-comparison {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem;
  margin: 1rem 0;
  font-size: 0.9rem;
}

.parameter-comparison h4 {
  color: var(--text-primary);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.parameter-comparison table {
  width: 100%;
  border-collapse: collapse;
}

.parameter-comparison th {
  text-align: left;
  padding: 0.5rem 0.75rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
}

.parameter-comparison td {
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  color: var(--text-primary);
}

body.dark-theme .parameter-comparison td {
  border-bottom-color: rgba(255, 255, 255, 0.05);
}

.parameter-comparison .parameter-name {
  font-weight: 500;
  color: var(--text-primary);
}

.parameter-comparison .changed-value {
  color: var(--secondary);
  font-weight: 600;
}

.parameter-comparison .unchanged-value {
  color: var(--text-light);
}

/* Enhanced Parameter Comparison Styles */
.parameter-comparison.enhanced {
  border: 2px solid var(--secondary-light);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.parameter-comparison .comparison-summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border-color);
}

.parameter-comparison .changed-count {
  font-size: 0.9rem;
  color: var(--secondary);
  font-weight: 600;
}

.parameter-comparison .reset-all-btn {
  background: var(--secondary);
  color: white;
  border: none;
  padding: 0.4rem 0.8rem;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.parameter-comparison .reset-all-btn:hover {
  background: var(--secondary-dark);
  transform: translateY(-1px);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.parameter-comparison .no-changes-message {
  text-align: center;
  color: var(--text-light);
  font-style: italic;
  padding: 1rem;
  background: var(--card-bg);
  border-radius: 4px;
  border: 1px dashed var(--border-color);
}

.parameter-comparison .group-header {
  background: var(--primary-light);
}

.parameter-comparison .group-name {
  font-weight: 600;
  color: var(--primary-dark);
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 0.5px;
  padding: 0.75rem 0.5rem;
  text-align: center;
}

body.dark-theme .parameter-comparison .group-header {
  background: rgba(255, 255, 255, 0.05);
}

body.dark-theme .parameter-comparison .group-name {
  color: var(--primary-light);
}

/* Enhanced table styling for grouped parameters */
.parameter-comparison.enhanced table {
  border-radius: 6px;
  overflow: hidden;
}

.parameter-comparison.enhanced th {
  background: var(--primary-light);
  color: var(--primary-dark);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 0.5px;
}

body.dark-theme .parameter-comparison.enhanced th {
  background: rgba(255, 255, 255, 0.05);
  color: var(--primary-light);
}

/* Responsive design for parameter comparison */
@media (max-width: 768px) {
  .parameter-comparison .comparison-summary {
    flex-direction: column;
    gap: 0.5rem;
    align-items: stretch;
  }

  .parameter-comparison .changed-count {
    text-align: center;
  }

  .parameter-comparison .reset-all-btn {
    width: 100%;
  }

  .parameter-comparison.enhanced {
    padding: 0.75rem;
    margin: 0.75rem 0;
  }

  .parameter-comparison .group-name {
    font-size: 0.7rem;
    padding: 0.5rem 0.25rem;
  }

  .parameter-comparison th,
  .parameter-comparison td {
    padding: 0.4rem 0.5rem;
    font-size: 0.8rem;
  }
}

/* Animation for changed values */
.parameter-comparison .changed-value {
  position: relative;
  animation: pulse 2s ease-in-out;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
}

/* Reset to Base Scenario Button */
.reset-to-base {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 1rem 0;
  box-shadow: var(--shadow-sm);
}

.reset-to-base:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.reset-to-base:active {
  transform: translateY(0);
}

.reset-to-base.success {
  background: linear-gradient(135deg, #10b981, #059669);
}

.reset-to-base.success::after {
  content: ' ✓';
  margin-left: 0.25rem;
}

.reset-to-base.reset-success {
  background: linear-gradient(135deg, #10b981, #059669);
  transform: scale(1.02);
}

/* Enhanced Visual States for Sliders */
.chart-container.whatif-active {
  position: relative;
  border: 2px solid rgba(99, 102, 241, 0.3);
  border-radius: 8px;
}

.chart-container.whatif-active::before {
  content: 'What-If Analysis Active';
  position: absolute;
  top: -1px;
  right: -1px;
  background: linear-gradient(135deg, var(--secondary), var(--primary));
  color: white;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.25rem 0.5rem;
  border-radius: 0 6px 0 6px;
  z-index: 10;
  letter-spacing: 0.025em;
}

.what-if-sliders.active {
  background: rgba(99, 102, 241, 0.05);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: 8px;
  padding: 1rem;
  position: relative;
}

.what-if-sliders.active::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--secondary), var(--primary));
  border-radius: 8px 8px 0 0;
}

/* Dark Theme Specific Overrides for What-If Analysis */
body.dark-theme .calculation-source-indicator.whatif-active {
  background: rgba(129, 140, 248, 0.15);
  border: 1px solid rgba(129, 140, 248, 0.4);
}

body.dark-theme .whatif-status-badge.active {
  background: linear-gradient(135deg, rgba(129, 140, 248, 0.2), rgba(129, 140, 248, 0.1));
  border: 1px solid rgba(129, 140, 248, 0.4);
  box-shadow: 0 2px 4px rgba(129, 140, 248, 0.15);
}

body.dark-theme .chart-container.whatif-active {
  border: 2px solid rgba(129, 140, 248, 0.4);
}

body.dark-theme .what-if-sliders.active {
  background: rgba(129, 140, 248, 0.1);
  border: 1px solid rgba(129, 140, 248, 0.3);
}

/* Mobile Optimizations for What-If Analysis */
@media (max-width: 768px) {
  .calculation-source-indicator {
    font-size: 0.75rem;
    padding: 0.3rem 0.6rem;
  }
  
  .whatif-status-badge {
    font-size: 0.8rem;
    padding: 0.5rem 0.75rem;
  }
  
  .parameter-comparison {
    padding: 0.75rem;
    font-size: 0.85rem;
  }
  
  .parameter-comparison th,
  .parameter-comparison td {
    padding: 0.4rem 0.5rem;
  }
  
  .reset-to-base {
    font-size: 0.85rem;
    padding: 0.6rem 1.2rem;
  }
  
  .chart-container.whatif-active::before {
    font-size: 0.65rem;
    padding: 0.2rem 0.4rem;
  }
}

/* ====== PHASE 3: INTERACTIVE FEATURES ====== */

/* Enhanced Tooltip System */
.tooltip-enhanced {
  position: relative;
  display: inline-block;
  border-bottom: 1px dotted var(--primary);
  cursor: help;
  color: var(--primary);
  font-weight: 500;
}

.tooltip-enhanced .tooltip-content-enhanced {
  visibility: hidden;
  opacity: 0;
  position: absolute;
  z-index: 10000;
  background: var(--card-bg);
  color: var(--text-primary);
  padding: 1rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  width: 320px;
  max-width: 90vw;
  font-size: 0.9rem;
  line-height: 1.4;
  font-weight: normal;
  transition: opacity 0.3s, visibility 0.3s;
  text-align: left;
}

.tooltip-enhanced:hover .tooltip-content-enhanced,
.tooltip-enhanced:focus .tooltip-content-enhanced {
  visibility: visible;
  opacity: 1;
}

/* Smart positioning for enhanced tooltips */
.tooltip-enhanced.tooltip-right .tooltip-content-enhanced {
  top: 50%;
  left: calc(100% + 10px);
  transform: translateY(-50%);
}

.tooltip-enhanced.tooltip-left .tooltip-content-enhanced {
  top: 50%;
  right: calc(100% + 10px);
  transform: translateY(-50%);
}

.tooltip-enhanced.tooltip-top .tooltip-content-enhanced {
  bottom: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%);
}

.tooltip-enhanced.tooltip-bottom .tooltip-content-enhanced {
  top: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%);
}

/* Scenario Filtering */
.scenario-filter-container {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem;
  margin: 1rem 0;
}

.filter-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.filter-header .icon {
  font-size: 1.2rem;
}

.filter-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

.filter-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.filter-group label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.filter-checkbox {
  appearance: none;
  width: 18px;
  height: 18px;
  border: 2px solid var(--border-color);
  border-radius: 3px;
  position: relative;
  cursor: pointer;
  transition: var(--transition);
}

.filter-checkbox:checked {
  background: var(--primary);
  border-color: var(--primary);
}

.filter-checkbox:checked::after {
  content: '✓';
  position: absolute;
  color: white;
  font-size: 12px;
  font-weight: bold;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}

.filter-select {
  padding: 0.5rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background: var(--input-bg);
  color: var(--text-primary);
  font-size: 0.9rem;
}

/* What-if Sliders */
.whatif-container {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.5rem;
  margin: 1rem 0;
}

.whatif-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.whatif-header .icon {
  font-size: 1.4rem;
}

.whatif-header h4 {
  margin: 0;
  color: var(--text-primary);
}

.whatif-controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.whatif-section {
  margin-bottom: 2rem;
  background: var(--card-background, var(--bg-secondary));
  border-radius: 12px;
  padding: 1rem;
  border: 1px solid var(--border-color);
}

.whatif-section .section-title {
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--text-primary);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--primary);
  display: flex;
  align-items: center;
}

.whatif-section .section-title::before {
  content: '';
  width: 4px;
  height: 18px;
  background: var(--primary);
  margin-right: 12px;
  border-radius: 2px;
}

.whatif-slider-group {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  background: var(--background-color, white);
  border-radius: 10px;
  padding: 1rem;
  border: 1px solid var(--border-light);
  transition: all 0.2s ease;
}

.whatif-slider-group:hover:not(.whatif-disabled) {
  border-color: var(--primary);
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.1);
}

.slider-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.slider-value {
  background: var(--primary);
  color: white;
  padding: 4px 10px;
  border-radius: 20px;
  font-weight: 600;
  font-size: 0.85rem;
  min-width: 50px;
  text-align: center;
}

.whatif-slider {
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--border-color);
  outline: none;
  appearance: none;
  cursor: pointer;
  transition: var(--transition);
}

.whatif-slider::-webkit-slider-thumb {
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  border: 2px solid white;
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
  transition: var(--transition);
}

.whatif-slider::-webkit-slider-thumb:hover {
  transform: scale(1.1);
  box-shadow: 0 4px 8px rgba(0,0,0,0.3);
}

.whatif-slider::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  border: 2px solid white;
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.whatif-impact {
  margin-top: 1rem;
  padding: 1rem;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: 6px;
}

.impact-summary {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--primary);
  font-weight: 500;
}

/* Copy/Share Functionality */
.copy-share-buttons {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
}

.copy-button, .share-button {
  padding: 0.5rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 0.8rem;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.copy-button:hover, .share-button:hover {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

.copy-button.success {
  background: #28a745;
  color: white;
  border-color: #28a745;
}

/* Confidence Level Indicators */
.confidence-indicator {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.confidence-high {
  background: rgba(40, 167, 69, 0.15);
  color: #28a745;
  border: 1px solid rgba(40, 167, 69, 0.3);
}

.confidence-medium {
  background: rgba(255, 193, 7, 0.15);
  color: #ffc107;
  border: 1px solid rgba(255, 193, 7, 0.3);
}

.confidence-low {
  background: rgba(220, 53, 69, 0.15);
  color: #dc3545;
  border: 1px solid rgba(220, 53, 69, 0.3);
}

.confidence-dots {
  display: flex;
  gap: 2px;
}

.confidence-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: currentColor;
}

/* Risk Indicators */
.risk-indicator {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem;
  border-radius: 6px;
  font-size: 0.9rem;
  margin: 0.5rem 0;
}

.risk-low {
  background: rgba(40, 167, 69, 0.1);
  border: 1px solid rgba(40, 167, 69, 0.2);
  color: #28a745;
}

.risk-medium {
  background: rgba(255, 193, 7, 0.1);
  border: 1px solid rgba(255, 193, 7, 0.2);
  color: #856404;
}

.risk-high {
  background: rgba(220, 53, 69, 0.1);
  border: 1px solid rgba(220, 53, 69, 0.2);
  color: #721c24;
}

.risk-icon {
  font-size: 1.2rem;
}

/* Personalization Panel */
.personalization-panel {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.5rem;
  margin: 1.5rem 0;
}

.personalization-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.personalization-header .icon {
  font-size: 1.5rem;
}

.personalization-form {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.form-input, .form-select {
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background: var(--input-bg);
  color: var(--text-primary);
  font-size: 0.9rem;
  transition: var(--transition);
}

.form-input:focus, .form-select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.radio-group {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.radio-option {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
}

.radio-input {
  appearance: none;
  width: 18px;
  height: 18px;
  border: 2px solid var(--border-color);
  border-radius: 50%;
  position: relative;
  cursor: pointer;
  transition: var(--transition);
}

.radio-input:checked {
  border-color: var(--primary);
}

.radio-input:checked::after {
  content: '';
  position: absolute;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary);
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}

/* Decision Framework */
.decision-framework {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.5rem;
  margin: 1.5rem 0;
}

.framework-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.framework-steps {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.framework-step {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem;
  background: rgba(59, 130, 246, 0.05);
  border-radius: 8px;
  border-left: 4px solid var(--primary);
}

.step-number {
  background: var(--primary);
  color: white;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 0.9rem;
  flex-shrink: 0;
}

.step-content h5 {
  margin: 0 0 0.5rem 0;
  color: var(--text-primary);
  font-size: 1rem;
}

.step-content p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.4;
}

/* Horizontal Scrolling Cards for Mobile */
.horizontal-scroll-container {
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--border-color) transparent;
  padding-bottom: 0.5rem;
}

.horizontal-scroll-container::-webkit-scrollbar {
  height: 6px;
}

.horizontal-scroll-container::-webkit-scrollbar-track {
  background: transparent;
}

.horizontal-scroll-container::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 3px;
}

.horizontal-card-row {
  display: flex;
  gap: 1rem;
  min-width: min-content;
  padding: 0.5rem 0;
}

.horizontal-card {
  flex: 0 0 280px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.horizontal-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

/* Sticky Summary Header */
.sticky-summary-header {
  position: sticky;
  top: 0;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem;
  margin-bottom: 1rem;
  z-index: 100;
  backdrop-filter: blur(10px);
}

.sticky-summary-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  max-width: 1400px;
  margin: 0 auto;
}

.sticky-optimal-age {
  font-weight: 600;
  color: var(--primary);
}

.sticky-optimal-value {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Swipe Gesture Indicators */
.swipe-indicator {
  display: none;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0, 0, 0, 0.7);
  color: white;
  padding: 0.5rem;
  border-radius: 50%;
  font-size: 1.5rem;
  z-index: 10;
  animation: swipe-hint 2s ease-in-out infinite;
}

.swipe-left {
  left: 10px;
}

.swipe-right {
  right: 10px;
}

@keyframes swipe-hint {
  0%, 100% { opacity: 0.3; transform: translateY(-50%) scale(1); }
  50% { opacity: 0.8; transform: translateY(-50%) scale(1.1); }
}

/* Mobile Optimizations for Phase 3 */
@media (max-width: 768px) {
  .tooltip-enhanced .tooltip-content-enhanced {
    width: 280px;
    font-size: 0.85rem;
    position: fixed;
    top: 50% !important;
    left: 50% !important;
    transform: translate(-50%, -50%) !important;
    z-index: 10000;
  }

  .scenario-filter-container,
  .whatif-container,
  .personalization-panel,
  .decision-framework {
    margin: 1rem 0;
    padding: 1rem;
  }

  .whatif-controls {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .personalization-form {
    grid-template-columns: 1fr;
  }

  .filter-controls {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  .copy-share-buttons {
    flex-wrap: wrap;
  }

  .horizontal-card {
    flex: 0 0 250px;
    padding: 0.75rem;
  }

  .swipe-indicator {
    display: block;
  }

  .sticky-summary-header {
    padding: 0.75rem;
  }

  .sticky-summary-content {
    flex-direction: column;
    text-align: center;
    gap: 0.5rem;
  }

  .framework-step {
    flex-direction: column;
    gap: 0.75rem;
    text-align: center;
  }

  .step-number {
    align-self: center;
  }
}

/* Desktop/Mobile Visibility Controls */
.desktop-only {
  display: block;
}

.mobile-only {
  display: none;
}

@media (max-width: 768px) {
  .desktop-only {
    display: none;
  }
  
  .mobile-only {
    display: block;
  }
}

/* Sticky Header Implementation */
.crossover-analysis-enhanced.has-sticky-header {
  position: relative;
}

.sticky-summary-header {
  position: sticky;
  top: 0;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem;
  margin-bottom: 1rem;
  z-index: 100;
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.sticky-summary-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  max-width: 1400px;
  margin: 0 auto;
}

/* Swipe Gesture Support */
.horizontal-scroll-container {
  position: relative;
  touch-action: pan-x;
}

.swipe-gesture-active .swipe-indicator {
  display: block;
  animation: swipe-hint 2s ease-in-out infinite;
}

/* Enhanced Mobile Animations */
@keyframes slide-in-left {
  from {
    transform: translateX(-100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes slide-in-right {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

.horizontal-card.slide-in-left {
  animation: slide-in-left 0.3s ease-out;
}

.horizontal-card.slide-in-right {
  animation: slide-in-right 0.3s ease-out;
}

/* Touch-friendly improvements */
@media (hover: none) and (pointer: coarse) {
  .tooltip-enhanced:active .tooltip-content-enhanced {
    visibility: visible;
    opacity: 1;
  }
  
  .whatif-slider::-webkit-slider-thumb {
    width: 24px;
    height: 24px;
  }
  
  .filter-checkbox, .radio-input {
    width: 24px;
    height: 24px;
  }
  
  /* Enhanced touch targets for mobile */
  .copy-button, .share-button {
    min-height: 44px;
    padding: 0.75rem 1.25rem;
  }
  
  .tab-button {
    min-height: 44px;
    padding: 0.75rem 1rem;
  }
  
  .filter-checkbox, .radio-input {
    min-width: 24px;
    min-height: 24px;
  }
}

/* Phase 1.5-5: Enhanced What-If Analysis Styles */

/* Conflict and disabled state styles */
.whatif-slider-group.whatif-disabled {
  opacity: 0.6;
  position: relative;
}

.whatif-slider-group.whatif-disabled .slider-label.disabled {
  color: #666;
}

.whatif-slider-group.whatif-disabled .conflict-indicator {
  color: #ff6b35;
  font-weight: 600;
  font-size: 0.85em;
}

.conflict-message {
  background: linear-gradient(135deg, #fff3cd, #ffeaa7);
  border: 1px solid #ffc107;
  border-radius: 6px;
  padding: 8px 12px;
  margin-top: 6px;
  font-size: 0.85em;
  color: #856404;
  line-height: 1.4;
}

/* Enhanced features integration note */
.integration-note {
  background: linear-gradient(135deg, #d1ecf1, #bee5eb);
  border: 1px solid #17a2b8;
  border-radius: 6px;
  padding: 6px 10px;
  margin-top: 4px;
  font-size: 0.8em;
  color: #0c5460;
  text-align: center;
}

.enhanced-features-note {
  background: linear-gradient(135deg, #fff3cd, #ffeaa7);
  border: 1px solid #ffc107;
  border-radius: 8px;
  padding: 10px 15px;
  margin-top: 10px;
  font-size: 0.9em;
  color: #856404;
  text-align: center;
  font-weight: 500;
}

/* Enhanced What-If Analysis - Duplicates removed */

/* Dark mode adjustments for What-If conflicts */
[data-theme="dark"] .conflict-message {
  background: linear-gradient(135deg, #3d3d00, #4a4a00);
  border-color: #ffcc00;
  color: #ffeb99;
}

[data-theme="dark"] .integration-note {
  background: linear-gradient(135deg, #003d44, #004a55);
  border-color: #17a2b8;
  color: #99d6e6;
}

[data-theme="dark"] .enhanced-features-note {
  background: linear-gradient(135deg, #3d3d00, #4a4a00);
  border-color: #ffcc00;
  color: #ffeb99;
}

[data-theme="dark"] .whatif-slider-group.whatif-disabled .slider-label.disabled {
  color: #999;
}

[data-theme="dark"] .whatif-slider-group.whatif-disabled .conflict-indicator {
  color: #ff8c69;
}

/* Responsive design for What-If sections */
@media (max-width: 768px) {
  .whatif-section {
    margin-bottom: 20px;
    padding: 12px;
  }
  
  .whatif-slider-group {
    padding: 12px;
    margin-bottom: 14px;
  }
  
  .whatif-slider-group .slider-label {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  
  .whatif-slider-group .slider-label .slider-value {
    align-self: flex-end;
  }
  
  .conflict-message,
  .integration-note,
  .enhanced-features-note {
    font-size: 0.8em;
    padding: 8px 10px;
  }
}

/* Phase 3 Enhancement: Improved Scenario-Specific Investment Parameter UX */

/* Investment override row styling */
.investment-override-row {
  position: relative;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  padding: 12px;
  margin: 8px 0;
  background: linear-gradient(135deg, #f8f9ff, #ffffff);
}

.investment-override-row label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-weight: 600;
  color: #2c3e50;
}

.investment-override-row .field-help {
  font-size: 0.85em;
  font-weight: 400;
  color: #6c757d;
  font-style: italic;
  margin-top: 2px;
}

.investment-override-row input[type="number"] {
  border: 2px solid #dee2e6;
  border-radius: 6px;
  padding: 10px 12px;
  font-size: 0.95em;
  font-weight: 500;
  background: #ffffff;
  transition: all 0.3s ease;
}

.investment-override-row input[type="number"]:focus {
  border-color: #007bff;
  box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
  outline: none;
}

.investment-override-row input[type="number"]::placeholder {
  color: #adb5bd;
  font-style: italic;
}

/* Dark theme support for investment override styling */
[data-theme="dark"] .investment-override-row {
  background: linear-gradient(135deg, #1a1a2e, #16213e);
  border-color: #404040;
}

[data-theme="dark"] .investment-override-row label {
  color: #e8e9ea;
}

[data-theme="dark"] .investment-override-row .field-help {
  color: #adb5bd;
}

[data-theme="dark"] .investment-override-row input[type="number"] {
  background: #2c3e50;
  border-color: #495057;
  color: #e8e9ea;
}

[data-theme="dark"] .investment-override-row input[type="number"]:focus {
  border-color: #17a2b8;
  box-shadow: 0 0 0 3px rgba(23, 162, 184, 0.1);
}

[data-theme="dark"] .investment-override-row input[type="number"]::placeholder {
  color: #6c757d;
}

/* Visual indicator for scenario-specific values */
.investment-override-row::before {
  content: "⚙️";
  position: absolute;
  top: -8px;
  right: 8px;
  background: #007bff;
  color: white;
  border-radius: 50%;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
}

[data-theme="dark"] .investment-override-row::before {
  background: #17a2b8;
}

/* --- DIALOG SYSTEM STYLES --- */
.dialog-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  opacity: 0;
  transition: opacity 0.2s ease-in-out;
}

.dialog-overlay.show {
  opacity: 1;
}

.dialog-container {
  background: var(--bg-secondary);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  max-width: 500px;
  width: 90%;
  margin: 1rem;
  transform: scale(0.95);
  transition: transform 0.2s ease-in-out;
}

.dialog-overlay.show .dialog-container {
  transform: scale(1);
}

.dialog-header {
  padding: 1.5rem 1.5rem 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

.dialog-title {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
}

.dialog-body {
  padding: 1.5rem;
}

.dialog-message {
  margin: 0;
  color: var(--text-secondary);
  line-height: 1.6;
}

.dialog-footer {
  padding: 0.75rem 1.5rem 1.5rem;
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
}

.dialog-btn {
  padding: 0.5rem 1.5rem;
  border: none;
  border-radius: calc(var(--border-radius) * 0.75);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

.dialog-btn-cancel {
  background: var(--bg-primary);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.dialog-btn-cancel:hover {
  background: var(--border-color);
}

.dialog-btn-confirm {
  background: var(--primary);
  color: white;
}

.dialog-btn-confirm:hover {
  background: var(--primary-hover);
}

.dialog-btn:focus {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* --- WHAT-IF SECTION TOGGLE STYLES --- */
.whatif-section-toggle {
  display: inline-block;
  margin-right: 8px;
  font-size: 0.85em;
  transition: transform 0.2s ease;
  user-select: none;
}

.whatif-container-title {
  cursor: pointer;
  user-select: none;
  transition: color 0.2s ease;
}

.whatif-container-title:hover {
  color: var(--primary);
}