/* ============================================
   QuadraCalc Pro - Professional Stylesheet
   Version 2.0 - Modern Dark Theme
   ============================================ */

/* CSS Variables */
:root {
  /* Primary Colors */
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-light: rgba(99, 102, 241, 0.15);
  --secondary: #8b5cf6;
  --secondary-hover: #7c3aed;

  /* Status Colors */
  --success: #10b981;
  --success-light: rgba(16, 185, 129, 0.15);
  --warning: #f59e0b;
  --warning-light: rgba(245, 158, 11, 0.15);
  --error: #ef4444;
  --error-light: rgba(239, 68, 68, 0.15);
  --info: #3b82f6;
  --info-light: rgba(59, 130, 246, 0.15);

  /* Backgrounds */
  --bg-darkest: #0a0f1a;
  --bg-dark: #0f172a;
  --bg-medium: #1e293b;
  --bg-light: #334155;
  --bg-lighter: #475569;

  /* Text */
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-dimmed: #64748b;

  /* Borders */
  --border-dark: #1e293b;
  --border-medium: #334155;
  --border-light: #475569;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);

  /* Sizing */
  --sidebar-width: 320px;
  --reference-width: 280px;
  --header-height: 70px;
  --footer-height: 40px;

  /* Animation */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
}

/* Reset & Base */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  font-family:
    "Inter",
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    Roboto,
    sans-serif;
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-primary);
  background: var(--bg-darkest);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* App Container */
.app-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

/* ============================================
   HEADER
   ============================================ */
.app-header {
  height: var(--header-height);
  background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-medium) 100%);
  border-bottom: 1px solid var(--border-medium);
  padding: 0 24px;
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.logo-section {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  font-size: 2rem;
  filter: drop-shadow(0 0 10px rgba(99, 102, 241, 0.5));
}

.logo-text h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.pro-badge {
  font-size: 0.65rem;
  padding: 2px 8px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  border-radius: 4px;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.tagline {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.header-info {
  display: flex;
  align-items: center;
  gap: 16px;
}

.info-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: var(--bg-light);
  border-radius: var(--radius-md);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.badge-icon {
  font-size: 0.9rem;
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  background: var(--bg-light);
  border-radius: var(--radius-md);
  font-size: 0.8rem;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--warning);
  animation: pulse 2s infinite;
}

.status-dot.connected {
  background: var(--success);
  animation: none;
}

.status-dot.error {
  background: var(--error);
  animation: none;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

/* ============================================
   MAIN CONTENT LAYOUT
   ============================================ */
.main-content {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* Sidebars */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-dark);
  border-right: 1px solid var(--border-medium);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  flex-shrink: 0;
}

.reference-sidebar {
  width: var(--reference-width);
  border-right: none;
  border-left: 1px solid var(--border-medium);
}

.sidebar-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-dark);
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  background: var(--bg-dark);
  z-index: 10;
}

.sidebar-header h2 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* ============================================
   CONFIG FORM
   ============================================ */
.config-form {
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.config-section {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.config-section h3 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Radio Groups */
.radio-group {
  display: flex;
  gap: 8px;
}

.radio-group.vertical {
  flex-direction: column;
}

.radio-card {
  flex: 1;
  padding: 12px;
  background: var(--bg-medium);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-fast);
}

.radio-card:hover {
  border-color: var(--primary);
}

.radio-card.active,
.radio-card:has(input:checked) {
  border-color: var(--primary);
  background: var(--primary-light);
}

.radio-card input {
  display: none;
}

.radio-content {
  display: flex;
  flex-direction: column;
  gap: 2px;
  text-align: center;
}

.radio-title {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-primary);
}

.radio-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.radio-option {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  background: var(--bg-medium);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-fast);
}

.radio-option:hover {
  border-color: var(--primary);
}

.radio-option:has(input:checked) {
  border-color: var(--primary);
  background: var(--primary-light);
}

.radio-option input[type="radio"] {
  width: 16px;
  height: 16px;
  accent-color: var(--primary);
}

.radio-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.radio-label {
  font-size: 0.85rem;
  color: var(--text-primary);
}

.radio-tag {
  font-size: 0.7rem;
  color: var(--text-muted);
}

.radio-tag.recommended {
  color: var(--success);
  font-weight: 600;
}

/* Input Groups */
.input-row {
  display: flex;
  gap: 12px;
}

.input-group {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.input-group.full {
  flex: none;
  width: 100%;
}

.input-group label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.input-group input,
.input-group select {
  padding: 10px 12px;
  background: var(--bg-medium);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.9rem;
  transition: var(--transition-fast);
}

.input-group input:focus,
.input-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.input-group input:hover,
.input-group select:hover {
  border-color: var(--border-light);
}

/* Lock/Toggle controls for parameter dependencies */
.lock-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 6px;
  cursor: pointer;
  font-size: 0.75rem;
  color: var(--text-muted);
  transition: var(--transition-fast);
}

.lock-toggle:hover {
  color: var(--text-secondary);
}

.lock-toggle input[type="checkbox"] {
  display: none;
}

.lock-toggle .lock-icon {
  font-size: 1rem;
  transition: var(--transition-fast);
}

.lock-toggle input[type="checkbox"]:checked + .lock-icon {
  content: "🔒";
}

.lock-toggle input[type="checkbox"]:checked ~ .lock-text {
  color: var(--primary);
}

.lock-toggle:has(input:checked) .lock-icon::after {
  content: "🔒";
}

/* Locked input state */
.input-group.locked input {
  background: var(--bg-light);
  border-color: var(--primary);
  color: var(--primary);
}

.input-group.auto-calculated input {
  background: linear-gradient(135deg, var(--bg-medium) 0%, rgba(99, 102, 241, 0.1) 100%);
  border-color: var(--primary);
  border-style: dashed;
}

/* Dependency info box */
.dependency-info {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
  padding: 8px 12px;
  background: var(--primary-light);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--primary);
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.dependency-info .info-icon {
  font-size: 1rem;
}

.dependency-info.hidden {
  display: none;
}

.input-hint {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-style: italic;
}

/* Frequency Slider */
.freq-slider-container {
  margin-top: 8px;
}

.freq-slider-container input[type="range"] {
  width: 100%;
  height: 6px;
  background: var(--bg-light);
  border-radius: 3px;
  appearance: none;
  cursor: pointer;
}

.freq-slider-container input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 18px;
  height: 18px;
  background: var(--primary);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: var(--shadow-md);
}

.slider-labels {
  display: flex;
  justify-content: space-between;
  margin-top: 4px;
  font-size: 0.7rem;
  color: var(--text-muted);
}

/* Form Actions */
.form-actions {
  display: flex;
  gap: 10px;
  margin-top: 8px;
}

.btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 16px;
  border: none;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition-fast);
}

.btn-primary {
  flex: 2;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: white;
}

.btn-primary:hover {
  box-shadow: var(--shadow-glow);
  transform: translateY(-1px);
}

.btn-secondary {
  flex: 1;
  background: var(--bg-light);
  color: var(--text-secondary);
  border: 1px solid var(--border-medium);
}

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

.btn-sm {
  padding: 6px 12px;
  font-size: 0.8rem;
}

.btn-icon {
  width: 32px;
  height: 32px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-light);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition-fast);
}

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

/* Presets */
.presets-section {
  padding: 16px 20px;
  border-top: 1px solid var(--border-dark);
}

.presets-section h3 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.presets-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.preset-chip {
  padding: 8px 12px;
  background: var(--bg-medium);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.8rem;
  cursor: pointer;
  transition: var(--transition-fast);
}

.preset-chip:hover {
  background: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary);
}

/* ============================================
   RESULTS SECTION
   ============================================ */
.results-section {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: var(--bg-darkest);
  overflow: hidden;
}

/* Results Summary */
.results-summary {
  padding: 16px 24px;
  background: var(--bg-dark);
  border-bottom: 1px solid var(--border-medium);
  min-height: 100px;
}

.summary-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 60px;
  color: var(--text-muted);
}

.placeholder-icon {
  font-size: 1.5rem;
  margin-bottom: 8px;
}

.summary-cards {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}

.summary-card {
  background: var(--bg-medium);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  text-align: center;
}

.summary-card.highlight {
  border-color: var(--primary);
  background: var(--primary-light);
}

.summary-card.warning {
  border-color: var(--warning);
  background: var(--warning-light);
}

.summary-card .card-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

.summary-card .card-value {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.summary-card .card-unit {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-left: 2px;
}

/* Viz Container */
.viz-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* Viz Tabs */
.viz-tabs {
  display: flex;
  background: var(--bg-dark);
  border-bottom: 1px solid var(--border-medium);
  padding: 0 24px;
  gap: 4px;
  overflow-x: auto;
}

.viz-tab {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-fast);
  white-space: nowrap;
}

.viz-tab:hover {
  color: var(--text-primary);
}

.viz-tab.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.tab-icon {
  font-size: 1rem;
}

/* Viz Content */
.viz-content-container {
  flex: 1;
  overflow: hidden;
  position: relative;
}

.viz-panel {
  display: none;
  flex-direction: column;
  height: 100%;
  padding: 20px 24px;
  overflow-y: auto;
}

.viz-panel.active {
  display: flex;
}

.panel-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.panel-toolbar h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.toolbar-actions {
  display: flex;
  gap: 8px;
}

.toolbar-controls {
  display: flex;
  align-items: center;
  gap: 12px;
}

.toolbar-controls label {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.toolbar-controls select {
  padding: 6px 12px;
  background: var(--bg-medium);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.85rem;
}

/* Chart Container */
.chart-container {
  flex: 1;
  min-height: 350px;
  background: var(--bg-dark);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  padding: 16px;
}

/* Polar Diagram */
.polar-container {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  justify-content: center;
}

#polarCanvas {
  background: var(--bg-dark);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
}

.polar-info {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 16px;
  background: var(--bg-dark);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  min-width: 150px;
}

.polar-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

.stat-value {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary);
}

.polar-frequency-bar {
  margin-top: 16px;
  padding: 16px;
  background: var(--bg-dark);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
}

.polar-frequency-bar input[type="range"] {
  width: 100%;
  height: 8px;
  background: var(--bg-light);
  border-radius: 4px;
  appearance: none;
  cursor: pointer;
}

.polar-frequency-bar input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 20px;
  height: 20px;
  background: var(--primary);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: var(--shadow-md);
}

.frequency-markers {
  display: flex;
  justify-content: space-between;
  margin-top: 8px;
  font-size: 0.7rem;
  color: var(--text-muted);
}

/* Bands Table */
.bands-table-container {
  flex: 1;
  overflow-y: auto;
  background: var(--bg-dark);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
}

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

.bands-table th,
.bands-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border-dark);
}

.bands-table th {
  background: var(--bg-medium);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  position: sticky;
  top: 0;
}

.bands-table td {
  font-size: 0.9rem;
  color: var(--text-primary);
}

.bands-table tr:hover {
  background: var(--bg-medium);
}

.bands-table tr.active-band {
  background: var(--success-light);
}

.bands-table tr.sub-diffusion-band {
  color: var(--text-muted);
}

.bands-table tr.plate-band {
  background: var(--warning-light);
}

.status-badge {
  display: inline-block;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
}

.status-badge.active {
  background: var(--success-light);
  color: var(--success);
}

.status-badge.inactive {
  background: var(--bg-light);
  color: var(--text-muted);
}

.status-badge.warning {
  background: var(--warning-light);
  color: var(--warning);
}

/* Comparison Panel */
.comparison-content {
  flex: 1;
  overflow-y: auto;
}

.comparison-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 200px;
  color: var(--text-muted);
  text-align: center;
}

.comparison-placeholder .small {
  font-size: 0.8rem;
  margin-top: 8px;
  color: var(--text-dimmed);
}

.comparison-grid {
  display: grid;
  gap: 16px;
}

.comparison-card {
  background: var(--bg-dark);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  padding: 16px;
}

.comparison-card h4 {
  font-size: 0.9rem;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.comparison-table {
  width: 100%;
}

.comparison-table th,
.comparison-table td {
  padding: 8px 12px;
  text-align: center;
  border-bottom: 1px solid var(--border-dark);
  font-size: 0.85rem;
}

.comparison-table th {
  color: var(--text-muted);
  font-weight: 500;
}

.error-positive {
  color: var(--warning);
}

.error-negative {
  color: var(--info);
}

.error-low {
  color: var(--success);
}

/* JSON Panel */
.json-container {
  flex: 1;
  overflow: hidden;
}

.json-output {
  height: 100%;
  overflow: auto;
  padding: 16px;
  background: var(--bg-dark);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  font-family: "Monaco", "Menlo", "Ubuntu Mono", monospace;
  font-size: 0.8rem;
  color: var(--info);
  line-height: 1.6;
  margin: 0;
}

.json-output code {
  color: inherit;
}

/* ============================================
   REFERENCE SIDEBAR
   ============================================ */
.ref-section {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-dark);
}

.ref-section h3 {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
}

/* Sequence Display */
.sequence-display {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.sequence-placeholder {
  color: var(--text-dimmed);
  font-size: 0.9rem;
}

.sequence-well {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-light);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-primary);
}

.sequence-well.max-depth {
  background: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary);
}

.ref-note {
  margin-top: 8px;
  font-size: 0.7rem;
  color: var(--text-dimmed);
  font-style: italic;
}

/* Frequency Limits */
.freq-limits {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.freq-limit {
  display: grid;
  grid-template-columns: 60px 1fr auto;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: var(--bg-medium);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--border-light);
}

.freq-limit.highlight {
  border-left-color: var(--primary);
  background: var(--primary-light);
}

.freq-limit.warning {
  border-left-color: var(--warning);
  background: var(--warning-light);
}

.limit-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
}

.limit-value {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-primary);
}

.limit-desc {
  font-size: 0.7rem;
  color: var(--text-dimmed);
}

/* Formulas */
.formulas .formula-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid var(--border-dark);
}

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

.formula {
  font-family: "Monaco", "Menlo", monospace;
  font-size: 0.8rem;
  color: var(--primary);
}

.formula-desc {
  font-size: 0.7rem;
  color: var(--text-muted);
}

/* Regime Legend */
.regime-legend {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.regime-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.regime-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.regime-item.sub-diffusion .regime-dot {
  background: var(--text-muted);
}

.regime-item.active-regime .regime-dot {
  background: var(--success);
}

.regime-item.plate .regime-dot {
  background: var(--warning);
}

.regime-item.super-plate .regime-dot {
  background: var(--error);
}

/* Sources */
.sources ul {
  list-style: none;
}

.sources li {
  padding: 4px 0;
  font-size: 0.75rem;
  color: var(--text-muted);
  border-left: 2px solid var(--border-light);
  padding-left: 10px;
  margin-bottom: 4px;
}

/* ============================================
   FOOTER
   ============================================ */
.app-footer {
  height: var(--footer-height);
  background: var(--bg-dark);
  border-top: 1px solid var(--border-medium);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.footer-content {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.separator {
  color: var(--border-light);
}

/* ============================================
   SCROLLBARS
   ============================================ */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-darkest);
}

::-webkit-scrollbar-thumb {
  background: var(--bg-lighter);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--border-light);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1400px) {
  .reference-sidebar {
    display: none;
  }

  .summary-cards {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (max-width: 1100px) {
  .config-sidebar {
    width: 280px;
  }

  .summary-cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 900px) {
  .main-content {
    flex-direction: column;
  }

  .config-sidebar {
    width: 100%;
    max-height: 400px;
  }

  .summary-cards {
    grid-template-columns: repeat(2, 1fr);
  }

  .polar-container {
    flex-direction: column;
    align-items: center;
  }

  #polarCanvas {
    width: 100%;
    max-width: 400px;
    height: auto;
  }
}

/* ============================================
   LOADING STATES
   ============================================ */
.loading-overlay {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

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

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Error State */
.error-message {
  padding: 16px;
  background: var(--error-light);
  border: 1px solid var(--error);
  border-radius: var(--radius-md);
  color: #fca5a5;
  font-size: 0.9rem;
  margin: 16px 0;
}

/* ============================================
   CO-DEPENDENCY STYLES
   ============================================ */
.co-dependent-row {
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.co-dep-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--primary);
  padding-top: 24px;
  opacity: 0.7;
  transition: var(--transition-fast);
}

.co-dependent-row:hover .co-dep-arrow {
  opacity: 1;
  animation: pulse-arrow 1s ease-in-out infinite;
}

@keyframes pulse-arrow {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.2);
    color: var(--secondary);
  }
}

.calculated-hint {
  display: block;
  font-size: 0.7rem;
  color: var(--success);
  margin-top: 2px;
  min-height: 14px;
  font-style: italic;
}

.input-group.calculating .calculated-hint {
  color: var(--warning);
}

.input-group.calculating input {
  border-color: var(--warning);
  animation: calculating-pulse 0.5s ease-in-out infinite;
}

@keyframes calculating-pulse {
  0%,
  100% {
    background: var(--bg-medium);
  }
  50% {
    background: rgba(245, 158, 11, 0.1);
  }
}

/* Freq-Depth Link */
.freq-depth-link {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
}

.freq-depth-link label {
  flex: 0 0 auto;
}

.link-arrow {
  color: var(--primary);
  font-size: 1.1rem;
  animation: link-pulse 2s ease-in-out infinite;
}

@keyframes link-pulse {
  0%,
  100% {
    opacity: 0.5;
  }
  50% {
    opacity: 1;
  }
}

.link-info {
  font-size: 0.75rem;
  color: var(--text-muted);
  background: var(--bg-light);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
}

.link-info strong {
  color: var(--primary);
}

/* ============================================
   FREQUENCY RANGE SELECTOR
   ============================================ */
.freq-range-selector {
  display: flex;
  gap: 2px;
  background: var(--bg-light);
  padding: 2px;
  border-radius: var(--radius-sm);
  margin-right: 8px;
}

.range-btn {
  background: transparent;
  border: none;
  padding: 4px 8px;
  font-size: 0.7rem;
  color: var(--text-muted);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
}

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

.range-btn.active {
  background: var(--primary);
  color: white;
}

/* ============================================
   CHART LEGEND INFO
   ============================================ */
.chart-legend-info {
  display: flex;
  gap: 16px;
  padding: 8px 12px;
  background: var(--bg-medium);
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  font-size: 0.75rem;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-secondary);
}

.legend-item.hidden {
  display: none;
}

.legend-color {
  width: 12px;
  height: 3px;
  border-radius: 2px;
}

.legend-color.d {
  background: #6366f1;
}

.legend-color.dn {
  background: #10b981;
}

.legend-color.s {
  background: #f59e0b;
}

.info-tooltip {
  cursor: help;
  color: var(--text-dimmed);
  font-size: 0.8rem;
}

/* BEM Model Badge */
.radio-tag.precise {
  background: rgba(139, 92, 246, 0.2);
  color: #a78bfa;
}