/* ==========================================================================
   GeoX Raster Lab — Sentinel Lab
   Design System: Nordic Slate (Technical, Restrained, Editorial, Cinematic)
   ========================================================================== */

:root {
  /* GeoX Nordic Slate Palette */
  --bg-void: #03060c;
  --bg-surface: #090d16;
  --bg-elevated: #0f1523;
  --bg-card: rgba(15, 21, 35, 0.88);
  --bg-card-hover: rgba(21, 28, 46, 0.94);
  
  --border-subtle: rgba(56, 189, 248, 0.12);
  --border-hover: rgba(56, 189, 248, 0.32);
  --border-active: #00d2ff;
  
  --accent-cyan: #00d2ff;
  --accent-blue: #3b82f6;
  --accent-emerald: #10b981;
  --accent-rose: #f43f5e;
  --accent-amber: #f59e0b;
  --accent-glow: rgba(0, 210, 255, 0.18);
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Menlo, Consolas, monospace;
  
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 18px;
  
  --shadow-panel: 0 16px 36px rgba(0, 0, 0, 0.55), 0 0 0 1px var(--border-subtle);
  --shadow-glow: 0 0 24px var(--accent-glow);
  
  --transition-fast: 0.18s ease;
  --transition-base: 0.28s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: var(--bg-void);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* App Layout */
.app-container {
  display: flex;
  flex-direction: column;
  width: 100vw;
  height: 100vh;
  position: relative;
}

/* Top Navigation Bar */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 54px;
  padding: 0 20px;
  background: rgba(9, 13, 22, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 1000;
}

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

.brand-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, #0b3038, #0e4b57);
  border: 1px solid rgba(0, 210, 255, 0.3);
  border-radius: 8px;
  font-weight: 700;
  font-size: 13px;
  color: var(--accent-cyan);
  box-shadow: 0 0 12px rgba(0, 210, 255, 0.2);
}

.brand-title {
  font-weight: 600;
  font-size: 14px;
  letter-spacing: -0.01em;
}

.brand-title a {
  color: var(--text-primary);
  text-decoration: none;
}

.brand-title span {
  color: var(--accent-cyan);
}

.brand-badge {
  padding: 3px 8px;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  font-size: 11px;
  font-weight: 500;
  color: var(--accent-cyan);
}

.topbar-center {
  display: flex;
  align-items: center;
  gap: 8px;
}

.study-area-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  font-size: 12px;
  color: var(--text-secondary);
}

.study-area-select {
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 12px;
  font-weight: 600;
  outline: none;
  cursor: pointer;
  padding-right: 4px;
  color-scheme: dark;
}

select {
  color-scheme: dark;
}

optgroup,
select optgroup,
.study-area-select optgroup,
.experiment-select optgroup {
  background-color: #0b111a !important;
  color: var(--accent-cyan) !important;
  font-size: 11px !important;
  font-weight: 700 !important;
  font-style: normal !important;
  letter-spacing: 0.05em !important;
  padding: 8px 10px 4px 10px !important;
}

option,
select option,
.study-area-select option,
.experiment-select option,
.zone-dropdown option,
.split-select option {
  background-color: #080c14 !important;
  color: #f1f5f9 !important;
  font-size: 12px !important;
  font-weight: 500 !important;
  padding: 6px 12px !important;
}

.study-area-pill .status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--accent-emerald);
  box-shadow: 0 0 8px var(--accent-emerald);
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  font-size: 12px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-primary);
}

.btn:hover {
  background: rgba(255, 255, 255, 0.05);
}

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

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

.btn-primary {
  background: rgba(0, 210, 255, 0.12);
  border-color: rgba(0, 210, 255, 0.3);
  color: var(--accent-cyan);
}

.btn-primary:hover {
  background: rgba(0, 210, 255, 0.2);
  border-color: var(--accent-cyan);
  box-shadow: var(--shadow-glow);
}

.btn-icon {
  width: 32px;
  height: 32px;
  padding: 0;
  justify-content: center;
}

/* Map Canvas Container */
.map-viewport {
  flex: 1;
  width: 100%;
  height: calc(100vh - 54px);
  position: relative;
  background: var(--bg-void);
}

#map {
  width: 100%;
  height: 100%;
  background: #06090e;
  z-index: 1;
}

/* Floating Overlay Panels */
.floating-panel {
  position: absolute;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-panel);
  z-index: 500;
  pointer-events: auto;
}

/* Top-Left Control Panel (Layers & Compare) */
.controls-panel {
  top: 16px;
  left: 16px;
  width: 330px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 10px;
}

.panel-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* Segmented Mode Control */
.segmented-control {
  display: flex;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 2px;
}

.segmented-btn {
  flex: 1;
  padding: 6px 10px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 4px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.segmented-btn.active {
  background: rgba(0, 210, 255, 0.14);
  color: var(--accent-cyan);
  font-weight: 600;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
}

/* Layer Selection Groups */
.control-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.control-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.layer-select-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 12px;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: left;
}

.layer-select-btn:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--border-hover);
  color: var(--text-primary);
}

.layer-select-btn.active {
  background: rgba(0, 210, 255, 0.08);
  border-color: var(--accent-cyan);
  color: var(--text-primary);
}

.layer-select-btn .layer-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border-subtle);
}

.layer-select-btn.active .layer-indicator {
  background: var(--accent-cyan);
  box-shadow: 0 0 8px var(--accent-cyan);
}

/* Split Compare Presets */
.preset-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 6px;
  margin-bottom: 4px;
}

.btn-preset {
  padding: 6px 8px;
  font-size: 11px;
  font-weight: 500;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  text-align: center;
  transition: all var(--transition-fast);
}

.btn-preset:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: var(--border-hover);
  color: var(--text-primary);
}

.btn-preset.active {
  background: rgba(0, 210, 255, 0.12);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  font-weight: 600;
}

/* Split Compare Drawer */
.split-config {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 10px;
  background: rgba(0, 0, 0, 0.25);
  border: 1px dashed var(--border-subtle);
  border-radius: var(--radius-sm);
  margin-top: 6px;
}

.split-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 11px;
  color: var(--text-secondary);
}

.split-select {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 11px;
  outline: none;
}

/* Swipe Divider / Handle */
.swipe-divider {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--accent-cyan);
  z-index: 600;
  cursor: ew-resize;
  pointer-events: auto;
  box-shadow: 0 0 12px rgba(0, 210, 255, 0.6);
  display: none;
}

.swipe-divider.visible {
  display: block;
}

.swipe-handle {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg-surface);
  border: 2px solid var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 16px rgba(0, 210, 255, 0.5);
  color: var(--accent-cyan);
  font-size: 14px;
  user-select: none;
}

/* Right Side: Area Analysis Panel */
.analysis-panel {
  top: 16px;
  right: 16px;
  width: 360px;
  max-height: calc(100vh - 86px);
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.zone-selector {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.zone-dropdown {
  width: 100%;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  outline: none;
  cursor: pointer;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.metric-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.metric-card.full-width {
  grid-column: span 2;
}

.metric-label {
  font-size: 10px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.metric-value {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
}

.metric-value.positive {
  color: var(--accent-emerald);
}

.metric-value.negative {
  color: var(--accent-rose);
}

.metric-value.neutral {
  color: var(--accent-cyan);
}

/* Histogram Container */
.histogram-container {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 4px;
}

.histogram-svg {
  width: 100%;
  height: 70px;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
}

/* Pixel Probe Floating Readout */
.probe-card {
  position: absolute;
  bottom: 24px;
  left: 16px;
  padding: 10px 14px;
  display: flex;
  align-items: center;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-secondary);
}

.probe-item {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.probe-item .probe-title {
  font-family: var(--font-sans);
  font-size: 9px;
  text-transform: uppercase;
  color: var(--text-muted);
}

.probe-item .probe-val {
  font-weight: 600;
  color: var(--text-primary);
}

/* Floating Legend */
.legend-panel {
  position: absolute;
  bottom: 24px;
  right: 16px;
  padding: 12px 14px;
  width: 280px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.legend-title {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
  display: flex;
  justify-content: space-between;
}

.legend-bar {
  width: 100%;
  height: 10px;
  border-radius: 3px;
  border: 1px solid var(--border-subtle);
}

.legend-bar.ndvi {
  background: linear-gradient(to right, 
    #12354c 0%, 
    #787d82 18%, 
    #d2b987 32%, 
    #d9e054 50%, 
    #5cb242 72%, 
    #228022 90%, 
    #0e5618 100%
  );
}

.legend-bar.delta {
  background: linear-gradient(to right,
    #a50026 0%,
    #de5634 25%,
    #f0c38c 45%,
    #3c444e 50%,
    #a5d791 55%,
    #46af5f 75%,
    #006837 100%
  );
}

.legend-labels {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-muted);
}

/* Modal and Drawers */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(3, 6, 12, 0.85);
  backdrop-filter: blur(8px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 2000;
}

.modal-backdrop.open {
  display: flex;
}

.modal-content {
  width: 90%;
  max-width: 680px;
  max-height: 85vh;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.7);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-subtle);
}

.modal-body {
  padding: 20px;
  overflow-y: auto;
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.modal-body h3 {
  color: var(--text-primary);
  font-size: 14px;
  margin: 16px 0 6px 0;
}

.modal-body h3:first-child {
  margin-top: 0;
}

.modal-body p {
  margin-bottom: 12px;
}

.modal-body ul {
  margin-left: 20px;
  margin-bottom: 12px;
}

.modal-body code {
  font-family: var(--font-mono);
  background: var(--bg-elevated);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 12px;
  color: var(--accent-cyan);
}

.download-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 10px;
}

.download-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.download-item:hover {
  border-color: var(--accent-cyan);
  background: rgba(0, 210, 255, 0.05);
}

/* Responsive adjustments */
@media (max-width: 900px) {
  .controls-panel {
    width: 290px;
  }
  .analysis-panel {
    display: none;
  }
}

/* ==========================================================================
   5-Experiment Modules Styles
   ========================================================================== */

/* Experiment Select Group */
.experiment-select-wrapper {
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-subtle);
}

.experiment-select {
  width: 100%;
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 600;
  background: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-medium, rgba(56, 189, 248, 0.25));
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  outline: none;
  cursor: pointer;
  transition: border-color var(--transition-fast);
}

.experiment-select:hover {
  border-color: var(--accent-cyan);
}

/* Water Module Controls */
.water-metric-box {
  background: rgba(0, 210, 255, 0.05);
  border: 1px solid rgba(0, 210, 255, 0.2);
  border-radius: var(--radius-sm);
  padding: 10px;
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.water-metric-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11px;
}

.water-slider-container {
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.water-slider {
  width: 100%;
  accent-color: var(--accent-cyan);
  cursor: pointer;
}

/* Wildfire USGS Severity Table */
.fire-severity-card {
  background: rgba(244, 63, 94, 0.06);
  border: 1px solid rgba(244, 63, 94, 0.2);
  border-radius: var(--radius-sm);
  padding: 10px;
  margin-top: 10px;
}

.fire-class-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 0;
  font-size: 11px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.fire-class-row:last-child {
  border-bottom: none;
}

.fire-class-badge {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 2px;
  margin-right: 6px;
}

.fire-class-badge.unburned { background: #328c50; }
.fire-class-badge.low { background: #f5cd32; }
.fire-class-badge.moderate { background: #eb6419; }
.fire-class-badge.high { background: #af0f14; }

/* Terrain Elevation & Slope Cards */
.terrain-stat-card {
  background: rgba(59, 130, 246, 0.06);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: var(--radius-sm);
  padding: 10px;
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.btn-profile {
  width: 100%;
  margin-top: 8px;
  display: flex;
  justify-content: center;
  gap: 6px;
}

/* Raster Calculator Module */
.calc-container {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 6px;
}

.calc-input-wrapper {
  display: flex;
  gap: 6px;
}

.calc-input {
  flex: 1;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--accent-cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 8px 10px;
  outline: none;
}

.calc-input:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 10px rgba(0, 210, 255, 0.2);
}

.calc-band-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin: 4px 0;
}

.calc-pill {
  padding: 3px 7px;
  font-size: 10px;
  font-family: var(--font-mono);
  font-weight: 600;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.calc-pill:hover {
  background: rgba(0, 210, 255, 0.15);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

.calc-status-box {
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-family: var(--font-mono);
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

.calc-status-box.success {
  border-color: var(--accent-emerald);
  color: #34d399;
}

.calc-status-box.error {
  border-color: var(--accent-rose);
  color: #fb7185;
}

/* ==========================================================================
   Mobile & Responsive Enhancements (Phones, Tablets & Touch Devices)
   ========================================================================== */

/* Panel Close Button (Hidden on Desktop) */
.panel-close-btn {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 16px;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 4px;
  line-height: 1;
  transition: all var(--transition-fast);
}

.panel-close-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.08);
}

/* Mobile Bottom Navigation Dock (Hidden on Desktop) */
.mobile-nav-dock {
  display: none;
}

/* Tablet Media Query (max-width: 1024px) */
@media (max-width: 1024px) {
  .controls-panel {
    width: 290px;
  }
  .analysis-panel {
    width: 320px;
  }
}

/* Mobile & Small Tablet Media Query (max-width: 768px) */
@media (max-width: 768px) {
  html, body {
    height: 100%;
    height: 100dvh;
  }

  .app-container {
    height: 100dvh;
  }

  /* Compact Responsive Topbar */
  .topbar {
    padding: 0 10px;
    height: 48px;
    gap: 8px;
  }

  .brand-badge {
    display: none !important;
  }

  .brand-title {
    font-size: 13px;
  }

  .study-area-pill {
    padding: 4px 8px;
    max-width: 180px;
  }

  .study-area-select {
    font-size: 11px;
    max-width: 150px;
    text-overflow: ellipsis;
  }

  #studyAreaSubLabel {
    display: none !important;
  }

  .topbar-actions {
    gap: 6px;
  }

  .topbar-actions .btn {
    padding: 6px 8px;
    font-size: 11px;
  }

  .topbar-actions .btn span {
    display: none;
  }

  /* Mobile Floating Action Dock */
  .mobile-nav-dock {
    display: flex !important;
    position: fixed !important;
    bottom: 0 !important;
    left: 0 !important;
    right: 0 !important;
    height: 56px;
    height: calc(56px + env(safe-area-inset-bottom, 0px));
    padding-bottom: env(safe-area-inset-bottom, 0px);
    background: rgba(11, 15, 20, 0.96) !important;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-top: 1px solid var(--border-subtle);
    z-index: 1200 !important;
    justify-content: space-around;
    align-items: center;
    pointer-events: auto !important;
  }

  .mobile-nav-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    height: 100%;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 11px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    padding: 6px 0;
    pointer-events: auto !important;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
  }

  .mobile-nav-btn svg {
    stroke: currentColor;
    transition: transform var(--transition-fast);
    pointer-events: none;
  }

  .mobile-nav-btn span {
    pointer-events: none;
  }

  .mobile-nav-btn.active, .mobile-nav-btn:hover {
    color: var(--accent-cyan);
  }

  .mobile-nav-btn.active svg {
    transform: scale(1.1);
  }

  /* Responsive Floating Overlay Panels as Bottom Sheets */
  .panel-close-btn {
    display: block;
    cursor: pointer;
    touch-action: manipulation;
  }

  .controls-panel,
  .analysis-panel {
    position: fixed !important;
    left: 8px !important;
    right: 8px !important;
    width: auto !important;
    max-width: calc(100vw - 16px) !important;
    top: auto !important;
    bottom: calc(62px + env(safe-area-inset-bottom, 0px)) !important;
    max-height: calc(100dvh - 120px) !important;
    border-radius: var(--radius-lg);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.8);
    z-index: 1100 !important;
    overflow-y: auto !important;
    -webkit-overflow-scrolling: touch;
    display: none !important;
    pointer-events: auto !important;
  }

  .controls-panel.mobile-open,
  .analysis-panel.mobile-open {
    display: flex !important;
    animation: slideUpMobile 0.25s ease-out;
  }

  @keyframes slideUpMobile {
    from {
      opacity: 0;
      transform: translateY(20px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  /* Dynamic Legend & Pixel Probe on Mobile */
  .legend-panel {
    position: fixed !important;
    left: 8px !important;
    right: 8px !important;
    width: auto !important;
    max-width: calc(100vw - 16px) !important;
    bottom: calc(62px + env(safe-area-inset-bottom, 0px)) !important;
    z-index: 850;
    display: none !important;
  }

  .legend-panel.mobile-open {
    display: block !important;
    animation: slideUpMobile 0.25s ease-out;
  }

  .probe-card {
    left: 8px !important;
    right: 8px !important;
    width: auto !important;
    max-width: calc(100vw - 16px) !important;
    bottom: calc(62px + env(safe-area-inset-bottom, 0px)) !important;
    z-index: 700;
    padding: 8px 12px;
    gap: 8px;
  }

  .probe-item {
    font-size: 11px;
  }

  .probe-val {
    font-size: 11px;
  }

  /* Larger touch targets for Swipe Slider */
  .swipe-handle {
    width: 44px;
    height: 44px;
    font-size: 16px;
  }

  /* Modals Full-Width on Mobile */
  .modal-backdrop {
    padding: 10px;
    align-items: flex-end;
  }

  .modal-content {
    width: 100%;
    max-width: 100%;
    max-height: 85dvh;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  }
}

/* Extra Small Phones (max-width: 480px) */
@media (max-width: 480px) {
  .brand-title a {
    display: inline-block;
    max-width: 80px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    vertical-align: middle;
  }

  .study-area-pill {
    max-width: 140px;
  }

  .study-area-select {
    max-width: 115px;
    font-size: 10px;
  }

  .metrics-grid {
    grid-template-columns: 1fr;
  }

  .metric-card.full-width {
    grid-column: span 1;
  }
}