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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #333;
    min-height: 100vh;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    color: white;
    margin-bottom: 30px;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.95;
    max-width: 800px;
    margin: 0 auto;
}

.controls-panel {
    background: white;
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    align-items: end;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.control-group label {
    font-weight: 600;
    color: #555;
    font-size: 0.9rem;
}

.control-group input[type="number"],
.control-group select {
    padding: 10px;
    border: 2px solid #e0e0e0;
    border-radius: 6px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.control-group input[type="number"]:focus,
.control-group select:focus {
    outline: none;
    border-color: #667eea;
}

.control-group input[type="range"] {
    width: 100%;
    height: 6px;
    background: #e0e0e0;
    border-radius: 3px;
    outline: none;
}

.control-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    background: #667eea;
    cursor: pointer;
    border-radius: 50%;
}

.control-group input[type="range"]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: #667eea;
    cursor: pointer;
    border-radius: 50%;
    border: none;
}

#speedLabel {
    font-size: 0.85rem;
    color: #666;
}

button {
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn-secondary:hover:not(:disabled) {
    background: #5a6268;
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.info-panel {
    background: white;
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.current-year {
    font-size: 1.2rem;
}

.year-label {
    font-weight: 600;
    color: #555;
    margin-right: 10px;
}

#currentYearDisplay {
    font-size: 2rem;
    font-weight: 700;
    color: #667eea;
}

.stats-display {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.stat-label {
    font-size: 0.85rem;
    color: #666;
    font-weight: 600;
}

.stat-item span:last-child {
    font-size: 1.5rem;
    font-weight: 700;
    color: #333;
}

#map {
    width: 100%;
    height: 600px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}

.legend {
    background: white;
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}

.legend h3 {
    margin-bottom: 20px;
    color: #333;
    font-size: 1.3rem;
}

.legend-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 15px;
}

.legend-section h4 {
    font-size: 1rem;
    color: #555;
    margin-bottom: 12px;
    border-bottom: 2px solid #667eea;
    padding-bottom: 5px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
    font-size: 0.9rem;
}

.legend-color {
    width: 40px;
    height: 20px;
    border-radius: 4px;
    border: 1px solid #ddd;
    flex-shrink: 0;
}

.legend-marker {
    border-radius: 50%;
    border: 2px solid #fff;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    flex-shrink: 0;
}

.legend-marker.small {
    width: 10px;
    height: 10px;
}

.legend-marker.large {
    width: 18px;
    height: 18px;
}

.legend-note {
    margin-top: 10px;
    font-size: 0.85rem;
    color: #666;
    font-style: italic;
    line-height: 1.5;
}

footer {
    background: white;
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.data-sources h4 {
    margin-bottom: 15px;
    color: #333;
    font-size: 1.1rem;
}

.data-sources ul {
    margin-left: 20px;
    margin-bottom: 15px;
}

.data-sources li {
    margin-bottom: 8px;
    color: #555;
    line-height: 1.6;
}

.disclaimer {
    background: #fff3cd;
    border-left: 4px solid #ffc107;
    padding: 15px;
    border-radius: 4px;
    color: #856404;
    line-height: 1.6;
}

/* Responsive design */
@media (max-width: 768px) {
    header h1 {
        font-size: 1.8rem;
    }

    .subtitle {
        font-size: 0.95rem;
    }

    .controls-panel {
        grid-template-columns: 1fr;
    }

    #map {
        height: 400px;
    }

    .info-panel {
        flex-direction: column;
        align-items: flex-start;
    }

    .stats-display {
        width: 100%;
        justify-content: space-between;
    }

    #currentYearDisplay {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 10px;
    }

    header h1 {
        font-size: 1.5rem;
    }

    .controls-panel {
        padding: 15px;
    }

    button {
        padding: 10px 16px;
        font-size: 0.9rem;
    }

    #map {
        height: 300px;
    }

    .stats-display {
        flex-direction: column;
        gap: 15px;
    }
}

/* Loading animation for map */
.leaflet-container {
    background: #f5f5f5;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #667eea;
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: #764ba2;
}