:root, [data-theme="dark"] {
  --bg-primary: #090d16;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.85);
  --bg-glass: rgba(15, 23, 42, 0.75);
  --border-color: rgba(255, 255, 255, 0.1);
  --border-glow: rgba(0, 240, 255, 0.3);
  
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --text-dim: #6b7280;
  
  --accent-cyan: #00f0ff;
  --accent-blue: #38bdf8;
  --accent-green: #22c55e;
  --accent-yellow: #eab308;
  --accent-orange: #f97316;
  --accent-red: #ef4444;
  --accent-purple: #a855f7;
  
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  
  --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 15px rgba(0, 240, 255, 0.25);
}

[data-theme="light"] {
  --bg-primary: #f1f5f9;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.88);
  --border-color: #cbd5e1;
  --border-glow: rgba(2, 132, 199, 0.4);
  
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-dim: #64748b;
  
  --accent-cyan: #0284c7;
  --accent-blue: #0284c7;
  --accent-green: #16a34a;
  --accent-yellow: #ca8a04;
  --accent-orange: #ea580c;
  --accent-red: #dc2626;
  --accent-purple: #9333ea;
  
  --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
  --shadow-glow: 0 0 15px rgba(2, 132, 199, 0.2);
}

[data-theme="light"] .beacon-item {
  background: #f8fafc;
  border-color: #e2e8f0;
}

[data-theme="light"] .beacon-item:hover {
  background: #f1f5f9;
  border-color: #cbd5e1;
}

[data-theme="light"] .beacon-item.selected {
  background: #e0f2fe;
  border-color: #0284c7;
}

[data-theme="light"] .modal-card,
[data-theme="light"] .elevation-drawer {
  background: #ffffff;
  color: #0f172a;
  border-color: #cbd5e1;
}

[data-theme="light"] .stat-card {
  background: #f8fafc;
  border-color: #e2e8f0;
}

[data-theme="light"] .stat-card-val {
  color: #0f172a;
}

[data-theme="light"] .sidebar-toggle-btn {
  background: rgba(255, 255, 255, 0.95);
  color: #0f172a;
  border-color: #cbd5e1;
}

[data-theme="light"] .sidebar-toggle-btn:hover {
  background: #f1f5f9;
  color: #0284c7;
}

[data-theme="light"] .sidebar.collapsed + .sidebar-toggle-btn {
  background: #ffffff;
  color: #0284c7;
  border-color: #cbd5e1;
}

[data-theme="light"] .station-input,
[data-theme="light"] .filter-select,
[data-theme="light"] .search-box input {
  background: #f8fafc;
  color: #0f172a;
  border-color: #cbd5e1;
}

[data-theme="light"] .btn-action {
  background: #f8fafc;
  color: #334155;
  border-color: #cbd5e1;
}

[data-theme="light"] .btn-action:hover {
  background: #e2e8f0;
  color: #0f172a;
}

[data-theme="light"] .btn-action.active {
  background: #0284c7;
  color: #ffffff;
  border-color: #0284c7;
}

[data-theme="light"] .floating-radar-container {
  background: rgba(255, 255, 255, 0.92);
  border-color: #cbd5e1;
}

[data-theme="light"] .leaflet-popup-content-wrapper,
[data-theme="light"] .leaflet-popup-tip {
  background: #ffffff !important;
  color: #0f172a !important;
  border: 1px solid #cbd5e1 !important;
}

[data-theme="light"] .leaflet-popup-content-wrapper .popup-beacon strong {
  color: #0f172a;
}

[data-theme="light"] .leaflet-popup-content-wrapper .popup-grid-item span {
  color: #64748b;
}

[data-theme="light"] .popup-actions .btn-popup {
  background: #f1f5f9;
  color: #334155;
  border-color: #cbd5e1;
}

[data-theme="light"] .popup-actions .btn-popup:hover {
  background: #0284c7;
  color: #ffffff;
}

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

body {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  color: var(--text-main);
  overflow: hidden;
  height: 100vh;
  width: 100vw;
  display: flex;
  flex-direction: column;
}

/* Header & Top Bar */
.topbar {
  height: 60px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  z-index: 1000;
  backdrop-filter: blur(10px);
}

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

.brand-icon {
  width: 28px;
  height: 28px;
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid rgba(245, 211, 66, 0.35);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 0 8px rgba(0, 0, 0, 0.4);
}

.brand-iaru-logo {
  height: 22px !important;
  width: auto !important;
  max-height: 22px !important;
  object-fit: contain;
  display: block;
}

.brand-text h1 {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-text .badge {
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(0, 240, 255, 0.15);
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 240, 255, 0.3);
  font-family: var(--font-mono);
}

.brand-text p {
  font-size: 11px;
  color: var(--text-muted);
}

/* Station QTH Bar */
.station-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(0, 0, 0, 0.3);
  padding: 4px 10px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

.station-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--accent-cyan);
  letter-spacing: 0.5px;
  display: flex;
  align-items: center;
  gap: 4px;
}

.station-input-wrap {
  display: flex;
  align-items: center;
  gap: 4px;
}

.station-input {
  background: #1f2937;
  border: 1px solid var(--border-color);
  color: #fff;
  padding: 5px 8px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 13px;
  width: 90px;
  text-transform: uppercase;
  text-align: center;
  transition: all 0.2s ease;
}

.station-input:focus {
  outline: none;
  border-color: var(--accent-cyan);
  box-shadow: 0 0 8px rgba(0, 240, 255, 0.3);
}

.btn-icon {
  background: #1f2937;
  border: 1px solid var(--border-color);
  color: var(--text-main);
  width: 28px;
  height: 28px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-icon:hover {
  background: var(--accent-cyan);
  color: #000;
}

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

.btn-action {
  background: #1f2937;
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s;
}

.btn-action:hover {
  background: #374151;
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-action.active {
  background: rgba(0, 240, 255, 0.2);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

.btn-primary-cta {
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.2), rgba(99, 102, 241, 0.25)) !important;
  border: 1px solid var(--accent-cyan) !important;
  color: #ffffff !important;
  font-weight: 700 !important;
  box-shadow: 0 0 12px rgba(0, 240, 255, 0.3);
}

.btn-primary-cta:hover {
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.4), rgba(99, 102, 241, 0.45)) !important;
  box-shadow: 0 0 18px rgba(0, 240, 255, 0.55);
  transform: translateY(-1px);
}

/* App Main Container */
.app-body {
  display: flex;
  flex: 1;
  position: relative;
  overflow: hidden;
}

/* Sidebar Drawer */
.sidebar {
  width: 380px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 500;
  box-shadow: 4px 0 24px rgba(0, 0, 0, 0.4);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.sidebar.collapsed {
  transform: translateX(-380px);
}

.sidebar-toggle-btn {
  position: absolute;
  left: 380px;
  top: 22px;
  z-index: 501;
  background: rgba(17, 24, 39, 0.94);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-left: none;
  color: var(--text-main);
  padding: 9px 12px;
  border-radius: 0 10px 10px 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.5px;
  box-shadow: 4px 2px 14px rgba(0, 0, 0, 0.35);
  transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1), background 0.2s, color 0.2s, transform 0.2s;
}

.sidebar-toggle-btn:hover {
  background: #1f2937;
  color: var(--accent-cyan);
  border-color: rgba(0, 240, 255, 0.4);
  box-shadow: 4px 2px 18px rgba(0, 240, 255, 0.25);
}

.sidebar.collapsed + .sidebar-toggle-btn {
  left: 0;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.95), rgba(30, 58, 138, 0.95));
  border: 1px solid rgba(0, 240, 255, 0.55);
  border-left: none;
  color: #00f0ff;
  padding: 10px 16px;
  border-radius: 0 20px 20px 0;
  box-shadow: 4px 4px 20px rgba(0, 240, 255, 0.25);
  animation: edgePulse 4s ease-in-out infinite;
}

@keyframes edgePulse {
  0%, 100% {
    box-shadow: 4px 4px 16px rgba(0, 240, 255, 0.2);
    border-color: rgba(0, 240, 255, 0.55);
  }
  50% {
    box-shadow: 6px 4px 24px rgba(0, 240, 255, 0.5);
    border-color: #38bdf8;
  }
}

.sidebar.collapsed + .sidebar-toggle-btn:hover {
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.3), rgba(30, 58, 138, 0.98));
  color: #ffffff;
  transform: translateX(4px);
}

/* Search & Filters Section */
.filter-section {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-color);
  background: rgba(0, 0, 0, 0.15);
}

.search-box {
  position: relative;
  margin-bottom: 12px;
}

.search-box input {
  width: 100%;
  background: #1f2937;
  border: 1px solid var(--border-color);
  color: #fff;
  padding: 8px 12px 8px 32px;
  border-radius: 6px;
  font-size: 13px;
}

.search-box input:focus {
  outline: none;
  border-color: var(--accent-cyan);
}

.search-box .icon {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-dim);
  font-size: 12px;
}

.filter-row {
  display: flex;
  gap: 8px;
  margin-bottom: 10px;
}

/* ITU Region Selector Bar */
.itu-region-bar {
  display: flex;
  gap: 4px;
  margin-bottom: 10px;
  background: rgba(15, 23, 42, 0.7);
  padding: 3px;
  border-radius: 6px;
  border: 1px solid var(--border-color);
}

.itu-btn {
  flex: 1;
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  font-size: 10.5px;
  font-weight: 600;
  padding: 5px 2px;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
  text-align: center;
}

.itu-btn:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

.itu-btn.active {
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.25), rgba(99, 102, 241, 0.25));
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 240, 255, 0.5);
  box-shadow: 0 0 8px rgba(0, 240, 255, 0.25);
}

.filter-select {
  flex: 1;
  background: #1f2937;
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 6px 8px;
  border-radius: 6px;
  font-size: 12px;
}

/* Band Chips Grid */
.band-chips-container {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: 8px;
}

.band-chip {
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-family: var(--font-mono);
  font-weight: 600;
  cursor: pointer;
  border: 1px solid var(--border-color);
  background: #1f2937;
  color: var(--text-muted);
  transition: all 0.15s ease;
  user-select: none;
}

.band-chip:hover {
  border-color: rgba(255, 255, 255, 0.3);
  color: #fff;
}

.band-chip.active {
  background: var(--chip-color, var(--accent-cyan));
  color: #000;
  border-color: var(--chip-color, var(--accent-cyan));
  box-shadow: 0 0 8px rgba(0, 240, 255, 0.3);
}

/* Beacon List in Sidebar */
.list-header {
  padding: 10px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
  background: rgba(0, 0, 0, 0.2);
}

.beacon-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
}

.beacon-item {
  background: #161f30;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 10px;
  margin-bottom: 8px;
  cursor: pointer;
  transition: all 0.2s;
}

.beacon-item:hover {
  border-color: var(--accent-cyan);
  background: #1c273c;
  transform: translateY(-1px);
}

.beacon-item.selected {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 10px rgba(0, 240, 255, 0.25);
  background: #1a2942;
}

.beacon-item-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 4px;
}

.beacon-call {
  font-size: 14px;
  font-weight: 700;
  font-family: var(--font-mono);
  color: #fff;
}

.beacon-freq {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--accent-cyan);
}

.beacon-item-mid {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.beacon-qth {
  font-family: var(--font-mono);
  color: #d1d5db;
}

.beacon-distance {
  color: var(--accent-yellow);
  font-family: var(--font-mono);
  font-weight: 600;
}

.beacon-item-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 10px;
  color: var(--text-dim);
}

.beacon-badge {
  display: inline-block;
  padding: 2px 5px;
  border-radius: 3px;
  font-size: 9px;
  font-weight: 700;
  font-family: var(--font-mono);
}

.beacon-card-actions {
  display: flex;
  gap: 6px;
  margin-top: 8px;
  padding-top: 6px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.btn-card-action {
  flex: 1;
  background: #1f2937;
  border: 1px solid var(--border-color);
  color: #e5e7eb;
  padding: 5px 4px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  transition: all 0.15s ease;
}

.btn-card-action:hover {
  background: var(--accent-cyan);
  color: #000;
  border-color: var(--accent-cyan);
}

/* Star / Watchlist button */
.btn-star {
  background: none;
  border: none;
  color: #6b7280;
  font-size: 16px;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 4px;
  transition: all 0.2s;
}

.btn-star:hover {
  color: #f59e0b;
  transform: scale(1.15);
}

.btn-star.active {
  color: #f59e0b;
  text-shadow: 0 0 8px rgba(245, 158, 11, 0.6);
}

/* Badges */
.badge-recent {
  background: rgba(34, 197, 94, 0.2);
  color: #22c55e;
  border: 1px solid rgba(34, 197, 94, 0.4);
  font-size: 9px;
  font-family: var(--font-mono);
  padding: 1px 5px;
  border-radius: 3px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 3px;
  animation: pulse-green 2s infinite;
}

@keyframes pulse-green {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

.badge-custom {
  background: rgba(168, 85, 247, 0.2);
  color: #c084fc;
  border: 1px solid rgba(168, 85, 247, 0.4);
  font-size: 9px;
  font-family: var(--font-mono);
  padding: 1px 5px;
  border-radius: 3px;
  font-weight: 700;
}

.badge-mode {
  background: rgba(2, 132, 199, 0.2);
  color: #38bdf8;
  border: 1px solid rgba(2, 132, 199, 0.4);
  font-size: 9px;
  font-family: var(--font-mono);
  padding: 1px 5px;
  border-radius: 3px;
  font-weight: 700;
}

.badge-source {
  background: rgba(100, 116, 139, 0.2);
  color: #94a3b8;
  border: 1px solid rgba(100, 116, 139, 0.3);
  font-size: 8px;
  font-family: var(--font-mono);
  padding: 1px 4px;
  border-radius: 3px;
}

.spotter-info {
  font-size: 10px;
  color: #94a3b8;
  display: flex;
  align-items: center;
  gap: 4px;
  margin-top: 3px;
}

.spotter-info strong {
  color: #38bdf8;
}

.badge-offset {
  background: rgba(234, 179, 8, 0.15);
  color: #facc15;
  border: 1px solid rgba(234, 179, 8, 0.3);
  font-size: 9px;
  font-family: var(--font-mono);
  padding: 1px 4px;
  border-radius: 3px;
}

/* S-Meter Badges & Bars */
.badge-smeter {
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 800;
  padding: 1px 6px;
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
  gap: 3px;
  letter-spacing: 0.2px;
}

.badge-smeter.smeter-s9plus {
  background: rgba(239, 68, 68, 0.2);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.45);
  box-shadow: 0 0 6px rgba(239, 68, 68, 0.3);
}

.badge-smeter.smeter-s9 {
  background: rgba(16, 185, 129, 0.2);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.45);
  box-shadow: 0 0 5px rgba(16, 185, 129, 0.25);
}

.badge-smeter.smeter-mid {
  background: rgba(6, 182, 212, 0.18);
  color: #22d3ee;
  border: 1px solid rgba(6, 182, 212, 0.35);
}

.badge-smeter.smeter-low {
  background: rgba(245, 158, 11, 0.15);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.badge-smeter.smeter-sub {
  background: rgba(100, 116, 139, 0.15);
  color: #94a3b8;
  border: 1px solid rgba(100, 116, 139, 0.25);
}

.smeter-widget {
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 8px 10px;
  margin-top: 8px;
}

.smeter-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11px;
  margin-bottom: 4px;
}

.smeter-track {
  height: 8px;
  background: #0f172a;
  border-radius: 4px;
  overflow: hidden;
  position: relative;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.smeter-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.3s ease;
  background: linear-gradient(90deg, #38bdf8 0%, #34d399 60%, #fbbf24 80%, #ef4444 100%);
}

.smeter-scale-labels {
  display: flex;
  justify-content: space-between;
  font-size: 8px;
  font-family: var(--font-mono);
  color: var(--text-dim);
  margin-top: 2px;
}

.beacon-user-note {
  font-size: 11px;
  color: #93c5fd;
  background: rgba(59, 130, 246, 0.1);
  padding: 4px 8px;
  border-left: 2px solid #3b82f6;
  border-radius: 0 4px 4px 0;
  margin-top: 4px;
  font-style: italic;
}

/* Modal Form Styles */
.form-group {
  margin-bottom: 12px;
}

.form-group label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.form-control {
  width: 100%;
  background: #1e293b;
  border: 1px solid var(--border-color);
  color: #fff;
  padding: 7px 10px;
  border-radius: 6px;
  font-size: 12px;
  font-family: var(--font-main);
}

.form-control:focus {
  outline: none;
  border-color: var(--accent-cyan);
}

.form-row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.btn-submit {
  width: 100%;
  background: var(--accent-cyan);
  color: #000;
  border: none;
  padding: 9px;
  border-radius: 6px;
  font-weight: 700;
  font-size: 13px;
  cursor: pointer;
  margin-top: 8px;
  transition: all 0.2s;
}

.btn-submit:hover {
  background: #38bdf8;
  box-shadow: 0 0 12px rgba(0, 240, 255, 0.4);
}

/* Map Container */
.map-container {
  flex: 1;
  position: relative;
  background: #060911;
}

#map {
  width: 100%;
  height: 100%;
}

/* Floating Widgets Overlay */
.floating-widgets {
  position: absolute;
  top: 15px;
  right: 15px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 400;
  pointer-events: none;
}

.widget-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 12px;
  box-shadow: var(--shadow-lg);
  pointer-events: auto;
  width: 260px;
}

.widget-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent-cyan);
  letter-spacing: 0.5px;
}

.widget-body {
  display: flex;
  justify-content: center;
  align-items: center;
}

/* Polar Radar Canvas */
#radarCanvas {
  width: 236px;
  height: 236px;
  background: #0d1322;
  border-radius: 50%;
  border: 1px solid rgba(0, 240, 255, 0.2);
}

/* Elevation Drawer (Bottom modal/drawer) */
.elevation-drawer {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 280px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  z-index: 600;
  transform: translateY(100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  padding: 12px 16px;
  box-shadow: 0 -10px 25px rgba(0,0,0,0.5);
}

.elevation-drawer.open {
  transform: translateY(0);
}

.drawer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.drawer-title {
  display: flex;
  align-items: center;
  gap: 12px;
}

.drawer-title h3 {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
}

.drawer-stats {
  display: flex;
  gap: 16px;
  font-size: 12px;
  color: var(--text-muted);
}

.drawer-stats span strong {
  color: var(--accent-cyan);
  font-family: var(--font-mono);
}

.drawer-close-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 18px;
  cursor: pointer;
}

.drawer-close-btn:hover {
  color: #fff;
}

.drawer-canvas-wrap {
  flex: 1;
  position: relative;
  width: 100%;
  height: calc(100% - 40px);
}

#elevationCanvas {
  width: 100%;
  height: 100%;
  background: #0c111e;
  border-radius: 6px;
  border: 1px solid var(--border-color);
}

/* Custom Leaflet Popups & Tooltips */
.leaflet-popup-content-wrapper {
  background: var(--bg-secondary) !important;
  color: var(--text-main) !important;
  border: 1px solid var(--border-color);
  border-radius: 8px !important;
  box-shadow: var(--shadow-lg) !important;
  font-family: var(--font-main);
}

.leaflet-popup-tip {
  background: var(--bg-secondary) !important;
}

.popup-beacon {
  padding: 4px;
}

.popup-title {
  font-size: 15px;
  font-weight: 700;
  font-family: var(--font-mono);
  color: #fff;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 4px;
  margin-bottom: 6px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.popup-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  font-size: 11px;
  margin-bottom: 8px;
}

.popup-grid-item span {
  color: var(--text-dim);
  display: block;
}

.popup-grid-item strong {
  color: #e5e7eb;
  font-family: var(--font-mono);
}

.popup-actions {
  display: flex;
  gap: 6px;
  margin-top: 8px;
}

.btn-popup {
  flex: 1;
  background: #1f2937;
  border: 1px solid var(--border-color);
  color: #fff;
  padding: 5px 0;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
  transition: all 0.2s;
}

.btn-popup:hover {
  background: var(--accent-cyan);
  color: #000;
}

/* Maidenhead Grid styling */
.maidenhead-label {
  color: rgba(255, 255, 255, 0.4);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: bold;
  pointer-events: none;
  text-shadow: 1px 1px 2px #000;
}

/* Modal styles for Export / Help */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.modal-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  width: 90%;
  max-width: 500px;
  padding: 20px;
  box-shadow: var(--shadow-lg);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 10px;
}

.modal-header h2 {
  font-size: 16px;
  color: #fff;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 20px;
  cursor: pointer;
}

.export-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 12px;
}

.export-btn {
  background: #1f2937;
  border: 1px solid var(--border-color);
  color: #fff;
  padding: 12px;
  border-radius: 8px;
  text-align: center;
  cursor: pointer;
  text-decoration: none;
  font-weight: 600;
  font-size: 13px;
  transition: all 0.2s;
}

.export-btn:hover {
  background: var(--accent-cyan);
  color: #000;
  border-color: var(--accent-cyan);
}

.export-btn span {
  display: block;
  font-size: 11px;
  color: var(--text-muted);
  font-weight: normal;
  margin-top: 4px;
}

.export-btn:hover span {
  color: #111827;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: #374151;
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: #4b5563;
}

/* =========================================================================
   ANALYTICS & STATS STYLES
   ========================================================================= */
.btn-stats {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.15), rgba(0, 240, 255, 0.15));
  border-color: rgba(99, 102, 241, 0.4);
  color: #c7d2fe;
}

.btn-stats:hover {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.3), rgba(0, 240, 255, 0.3));
  border-color: var(--accent-cyan);
  color: #fff;
  box-shadow: 0 0 10px rgba(99, 102, 241, 0.3);
}

.stats-cards-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-top: 10px;
}

@media (max-width: 650px) {
  .stats-cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.stat-card {
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--border-color);
  padding: 12px 10px;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.stat-card-label {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 500;
}

.stat-card-val {
  font-size: 22px;
  font-family: var(--font-mono);
  font-weight: 700;
  margin: 4px 0;
  color: #fff;
}

.stat-card-sub {
  font-size: 10px;
  color: var(--text-dim);
}

.stat-history-container {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 10px;
}

.stat-history-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 4px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 11.5px;
}

.stat-history-row:last-child {
  border-bottom: none;
}

.stat-sublist {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 8px;
  max-height: 140px;
  overflow-y: auto;
}

.stat-sublist-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 4px 6px;
  font-size: 11.5px;
  border-radius: 4px;
}

.stat-sublist-item:hover {
  background: rgba(255, 255, 255, 0.04);
}