:root {
     --bg-primary: #0f1419;
     --bg-secondary: #1a1f26;
     --bg-tertiary: #242b33;
     --text-primary: #e7e9ea;
     --text-secondary: #8b98a5;
     --accent-blue: #1d9bf0;
     --accent-cyan: #00d4aa;
     --accent-purple: #9b59b6;
     --accent-orange: #f97316;
     --accent-pink: #ec4899;
     --accent-yellow: #eab308;
     --border-color: #2f3942;
     --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
 }

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

body {
    font-family: 'DM Sans', -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow: hidden;
}

.app-shell {
    display: flex;
    height: 100vh;
    width: 100vw;
}

.map-area {
    position: relative;
    flex: 1;
    height: 100vh;
    overflow: hidden;
}

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

.control-panel {
    position: relative;
    z-index: 1000;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    border-radius: 0 16px 16px 0;
    padding: 0;
    width: 340px;
    max-width: 420px;
    min-width: 280px;
    height: 100vh;
    overflow: hidden;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    transition: width 0.3s ease;
}

 .panel-header {
     padding: 20px 24px;
     background: linear-gradient(135deg, var(--bg-tertiary) 0%, var(--bg-secondary) 100%);
     border-bottom: 1px solid var(--border-color);
 }

 .panel-header h1 {
     font-size: 1.25rem;
     font-weight: 700;
     color: var(--text-primary);
     display: flex;
     align-items: center;
     gap: 10px;
 }

 .panel-header h1::before {
     content: '';
     width: 8px;
     height: 8px;
     background: var(--accent-cyan);
     border-radius: 50%;
     box-shadow: 0 0 12px var(--accent-cyan);
 }

 .panel-header p {
     font-size: 0.85rem;
     color: var(--text-secondary);
     margin-top: 4px;
     padding-left: 18px;
 }

 .panel-content {
     padding: 16px 20px;
     overflow-y: auto;
     flex: 1;
 }

 .layer-section {
     margin-bottom: 20px;
 }

 .section-title {
     font-size: 0.7rem;
     font-weight: 600;
     color: var(--text-secondary);
     text-transform: uppercase;
     letter-spacing: 1.5px;
     margin-bottom: 12px;
     padding-left: 4px;
 }

 .layer-item {
     display: flex;
     align-items: center;
     padding: 12px 14px;
     background: var(--bg-tertiary);
     border-radius: 10px;
     margin-bottom: 8px;
     cursor: pointer;
     transition: all 0.2s ease;
     border: 1px solid transparent;
 }

 .layer-item:hover {
     border-color: var(--border-color);
     transform: translateX(4px);
 }

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

 .layer-item.disabled:hover {
     transform: none;
 }

 .layer-checkbox {
     appearance: none;
     width: 20px;
     height: 20px;
     border: 2px solid var(--border-color);
     border-radius: 6px;
     margin-right: 12px;
     cursor: pointer;
     position: relative;
     transition: all 0.2s ease;
     flex-shrink: 0;
 }

 .layer-checkbox:checked {
     background: var(--accent-cyan);
     border-color: var(--accent-cyan);
 }

 .layer-checkbox:checked::after {
     content: '✓';
     position: absolute;
     top: 50%;
     left: 50%;
     transform: translate(-50%, -50%);
     color: var(--bg-primary);
     font-size: 12px;
     font-weight: 700;
 }

 .layer-checkbox:disabled {
     cursor: not-allowed;
 }

 .layer-color {
     width: 14px;
     height: 14px;
     border-radius: 4px;
     margin-right: 10px;
     flex-shrink: 0;
     box-shadow: 0 0 8px currentColor;
 }

 .layer-label {
     font-size: 0.9rem;
     font-weight: 500;
     flex: 1;
 }

 .layer-count {
     font-family: 'JetBrains Mono', monospace;
     font-size: 0.75rem;
     color: var(--text-secondary);
     background: var(--bg-secondary);
     padding: 3px 8px;
     border-radius: 6px;
 }

 .todo-badge {
     font-size: 0.65rem;
     font-weight: 600;
     color: var(--accent-orange);
     background: rgba(249, 115, 22, 0.15);
     padding: 3px 8px;
     border-radius: 6px;
     text-transform: uppercase;
     letter-spacing: 0.5px;
 }

 /* Legend */
.legend {
    position: absolute;
    bottom: 20px;
    right: 20px;
    z-index: 1000;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px 20px;
    box-shadow: var(--shadow);
    min-width: 200px;
}

 .legend-title {
     font-size: 0.7rem;
     font-weight: 600;
     color: var(--text-secondary);
     text-transform: uppercase;
     letter-spacing: 1.5px;
     margin-bottom: 0;
 }

 .legend-item {
     display: flex;
     align-items: center;
     margin-bottom: 8px;
     font-size: 0.85rem;
 }

 .legend-item:last-child {
     margin-bottom: 0;
 }

 .legend-color {
     width: 24px;
     height: 4px;
     border-radius: 2px;
     margin-right: 10px;
 }

 .legend-color.dashed {
     background: repeating-linear-gradient(
         90deg,
         currentColor 0,
         currentColor 4px,
         transparent 4px,
         transparent 8px
     );
     height: 3px;
 }

 .legend-point {
     width: 10px;
     height: 10px;
     border-radius: 50%;
     margin-right: 10px;
     margin-left: 7px;
 }

 /* Info popup styling */
 .leaflet-popup-content-wrapper {
     background: var(--bg-secondary);
     color: var(--text-primary);
     border-radius: 12px;
     border: 1px solid var(--border-color);
     box-shadow: var(--shadow);
 }

 .leaflet-popup-tip {
     background: var(--bg-secondary);
     border: 1px solid var(--border-color);
 }

 .leaflet-popup-content {
     font-family: 'DM Sans', sans-serif;
     font-size: 0.9rem;
     margin: 14px 16px;
 }

/* Position popup arrow on the right, pointing toward cursor */
.popup-left .leaflet-popup-tip-container {
    left: calc(100% - 18px);
    right: auto;
    top: 50%;
    margin-left: 0;
    transform: translateY(-50%) rotate(90deg);
}

.popup-left .leaflet-popup-tip {
    transform: rotate(90deg);
}

 .popup-title {
     font-weight: 600;
     font-size: 1rem;
     margin-bottom: 8px;
     color: var(--accent-cyan);
 }

 .popup-detail {
     color: var(--text-secondary);
     font-size: 0.85rem;
     line-height: 1.6;
 }

 .popup-detail strong {
     color: var(--text-primary);
 }

 /* Loading indicator */
 .loading-overlay {
     position: fixed;
     top: 0;
     left: 0;
     right: 0;
     bottom: 0;
     background: var(--bg-primary);
     display: flex;
     align-items: center;
     justify-content: center;
     z-index: 2000;
     flex-direction: column;
     gap: 20px;
 }

 .loading-spinner {
     width: 48px;
     height: 48px;
     border: 3px solid var(--border-color);
     border-top-color: var(--accent-cyan);
     border-radius: 50%;
     animation: spin 1s linear infinite;
 }

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

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

 .hidden {
     display: none !important;
 }

 /* Attribution styling */
 .leaflet-control-attribution {
     background: var(--bg-secondary) !important;
     color: var(--text-secondary) !important;
     font-family: 'DM Sans', sans-serif !important;
     border-radius: 8px 0 0 0 !important;
     padding: 4px 8px !important;
 }

 .leaflet-control-attribution a {
     color: var(--accent-cyan) !important;
 }

 /* Zoom controls */
 .leaflet-control-zoom {
     border: none !important;
     border-radius: 10px !important;
     overflow: hidden;
     box-shadow: var(--shadow) !important;
 }

 .leaflet-control-zoom a {
     background: var(--bg-secondary) !important;
     color: var(--text-primary) !important;
     border: none !important;
     width: 36px !important;
     height: 36px !important;
     line-height: 36px !important;
     font-size: 18px !important;
 }

 .leaflet-control-zoom a:hover {
     background: var(--bg-tertiary) !important;
     color: var(--accent-cyan) !important;
 }

 .leaflet-control-zoom-in {
     border-bottom: 1px solid var(--border-color) !important;
     border-radius: 10px 10px 0 0 !important;
 }

 .leaflet-control-zoom-out {
     border-radius: 0 0 10px 10px !important;
 }

 /* Collapsible panels */
 .panel-toggle {
     background: transparent;
     border: none;
     color: var(--text-secondary);
     cursor: pointer;
     padding: 6px;
     border-radius: 6px;
     display: flex;
     align-items: center;
     justify-content: center;
     transition: all 0.2s ease;
     margin-left: auto;
 }

 .panel-toggle:hover {
     background: var(--bg-tertiary);
     color: var(--text-primary);
 }

 .panel-toggle svg {
     width: 18px;
     height: 18px;
     transition: transform 0.3s ease;
 }

 .panel-header {
     display: flex;
     align-items: flex-start;
     justify-content: space-between;
 }

 .panel-header-content {
     flex: 1;
 }

 .control-panel .panel-content {
     transition: max-height 0.3s ease, padding 0.3s ease, opacity 0.2s ease;
     overflow: hidden;
 }

.control-panel.collapsed {
    width: 68px;
    min-width: 68px;
}

.control-panel.collapsed .panel-header-content {
    display: none;
}

.control-panel.collapsed .panel-content {
    max-height: 0;
    padding-top: 0;
    padding-bottom: 0;
    opacity: 0;
}

.control-panel.collapsed .panel-toggle svg {
    transform: rotate(180deg);
}

 /* Legend collapsible */
 .legend {
     transition: all 0.3s ease;
 }

 .legend-header {
     display: flex;
     align-items: center;
     justify-content: space-between;
     cursor: pointer;
 }

 .legend-header:hover .panel-toggle {
     background: var(--bg-tertiary);
     color: var(--text-primary);
 }

 .legend-content {
     margin-top: 12px;
     transition: max-height 0.3s ease, margin-top 0.3s ease, opacity 0.2s ease;
     overflow: hidden;
 }

 .legend.collapsed .legend-content {
     max-height: 0;
     margin-top: 0;
     opacity: 0;
 }

 .legend.collapsed .panel-toggle svg {
     transform: rotate(180deg);
 }

 .legend.collapsed {
     min-width: auto;
 }

/* Fixed info panel for feature details */
.info-panel {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 360px;
    max-width: 90vw;
    max-height: calc(100vh - 40px);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: var(--shadow);
    z-index: 1200;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.info-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 14px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
    cursor: move;
    user-select: none;
}

.info-title {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.info-close {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.25rem;
    cursor: pointer;
    line-height: 1;
    padding: 4px 8px;
    border-radius: 8px;
    transition: background 0.2s ease, color 0.2s ease;
}

.info-close:hover {
    background: var(--bg-primary);
    color: var(--text-primary);
}

.info-content {
    padding: 14px 16px;
    overflow-y: auto;
    color: var(--text-primary);
    line-height: 1.6;
}