:root {
    --panel-bg: rgba(33, 37, 41, 0.85);
    --panel-border: rgba(255, 255, 255, 0.1);
    --accent-color: #4CAF50;
    --text-color: #f8f9fa;
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

body { 
    margin: 0; 
    padding: 0; 
    overflow: hidden; 
    background-color: #303e4f;
    font-family: var(--font-main);
}

canvas { 
    display: block; 
}

/* Visualization Container */
.visualization-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    z-index: 10;
}

/* Info Panels */
.info-panel {
    position: absolute;
    background: var(--panel-bg);
    color: var(--text-color);
    font-family: var(--font-main);
    font-size: 12px;
    line-height: 1.5;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    padding: 12px 15px;
    backdrop-filter: blur(8px);
    border: 1px solid var(--panel-border);
    transition: opacity 0.3s ease;
    z-index: 100;
}

#info { 
    bottom: 25px; 
    left: 25px; 
    min-width: 180px; 
}

#colorLegend { 
    bottom: 25px; 
    right: 25px; 
    display: flex; 
    flex-direction: column; 
    align-items: flex-start; 
}

#errorMessage {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(220, 53, 69, 0.9);
    max-width: 80%;
    text-align: center;
    display: none;
    padding: 15px 20px;
}

#loadingMessage {
    top: 40%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(33, 37, 41, 0.9);
    max-width: 80%;
    text-align: center;
    padding: 15px 20px;
}

/* Map Panel */
#mapPanel {
    position: absolute;
    top: 10px;
    left: 20px;
    width: 300px;
    height: 160px;
    background: var(--panel-bg);
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    border: 1px solid var(--panel-border);
    z-index: 1000;
}

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

/* Panel Elements */
.panel-title { 
    color: var(--accent-color); 
    font-weight: 600; 
    margin-bottom: 10px; 
    font-size: 14px; 
    text-transform: uppercase; 
    letter-spacing: 0.5px; 
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.panel-row { 
    display: flex; 
    margin-bottom: 6px; 
}

.panel-label { 
    opacity: 0.7; 
    min-width: 80px; 
}

.panel-value { 
    font-weight: 500; 
}

/* Gradient Legend */
#gradientContainer { 
    width: 200px; 
    margin-top: 8px; 
}

#gradientBar { 
    width: 100%; 
    height: 12px; 
    border-radius: 6px; 
    margin-bottom: 5px; 
}

#gradientLabels {
    display: flex;
    justify-content: space-between;
    width: 100%;
    font-size: 11px;
    opacity: 0.8;
    position: relative;
}

#gradientLabels span {
    position: absolute;
}

#minHeightLabel { left: 0; }
#midHeightLabel { left: 60%; transform: translateX(-50%); }
#maxHeightLabel { right: 0; }

/* Buttons */
.control-button { 
    background: rgba(255, 255, 250, 0.1); 
    border: none; 
    color: var(--text-color); 
    padding: 5px 10px; 
    border-radius: 4px; 
    font-size: 12px; 
    cursor: pointer; 
    transition: background 0.2s; 
    margin-top: 10px; 
}

.control-button:hover { 
    background: rgba(255, 255, 255, 0.2); 
}

.control-button:disabled {
    background: rgba(255, 255, 255, 0.05);
    cursor: not-allowed;
    opacity: 0.5;
}

/* Leaflet Overrides */
.leaflet-popup-content {
    font-size: 10px !important;
    line-height: 1.2 !important;
    margin: 5px !important;
    padding-right: 6px !important;
}

.leaflet-popup-content-wrapper {
    padding: 2px !important;
}

.leaflet-popup-tip-container {
    width: 10px !important;
    height: 10px !important;
}

.leaflet-popup {
    z-index: 1500 !important;
}

.leaflet-control-year-select {
    background: #FFFFFF;
    border-radius: 3px;
    padding: 2px;
    border: 1px solid #D3D3D3;
}

.leaflet-control-year-select select {
    background: transparent;
    color: #333333;
    border: none;
    padding: 2px;
    border-radius: 3px;
    font-size: 10px;
    cursor: pointer;
    font-family: var(--font-main);
}

.leaflet-control-year-select select:focus {
    outline: none;
}

.leaflet-control-zoom-in,
.leaflet-control-zoom-out {
    width: 20px !important;
    height: 20px !important;
    line-height: 20px !important;
    font-size: 14px !important;
    text-align: center !important;
}

.leaflet-control-zoom a {
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
}

/* Dat.GUI Overrides */
.dg.ac { 
    position: fixed !important; 
    top: 10px !important;
    right: 12px !important; 
    left: auto !important; 
    z-index: 1000 !important; 
}

.dg.main {
    background: var(--panel-bg) !important;
    border: 1px solid var(--panel-border) !important;
    border-radius: 8px !important;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2) !important;
    backdrop-filter: blur(8px) !important;
    padding: 0 !important;
}

.dg .c { 
    color: var(--text-color) !important; 
}

.dg .cr { 
    border-left: none !important; 
}

.dg .property-name { 
    color: var(--text-color) !important; 
    font-family: var(--font-main) !important; 
    font-size: 12px !important; 
    opacity: 0.7 !important; 
}

.dg .c input[type="text"], 
.dg .c input[type="number"] { 
    background: rgba(255, 255, 255, 0.1) !important; 
    color: var(--text-color) !important; 
    border: none !important; 
    font-family: var(--font-main) !important; 
    font-size: 12px !important; 
}

.dg .c input[type="checkbox"] { 
    accent-color: var(--accent-color) !important; 
}

.dg .cr.function .property-name { 
    width: 100% !important; 
    color: var(--accent-color) !important; 
    opacity: 1 !important; 
}

.dg .cr.function:hover { 
    background: rgba(255, 255, 255, 0.1) !important; 
}

.dg .close-button { 
    position: relative !important;
    background: rgba(255, 255, 255, 0.1) !important; 
    border-top: none !important; 
    border-bottom-left-radius: 8px !important;
    border-bottom-right-radius: 8px !important;
    color: var(--text-color) !important; 
    font-family: var(--font-main) !important; 
    font-size: 12px !important; 
    text-align: center !important; 
    padding: 8px !important; 
    margin-top: 5px !important;
    width: 100% !important;
    box-sizing: border-box !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    min-height: 22px !important;
}

.dg .close-button:hover { 
    background: rgba(255, 255, 255, 0.2) !important; 
}

/* Height Distribution Modal */
#heightDistributionModal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--panel-bg);
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    border: 1px solid var(--panel-border);
    padding: 15px;
    z-index: 2000;
    display: none;
    width: 400px;
    max-width: 90%;
    max-height: 80vh;
    overflow: auto;
}

#heightDistributionChart {
    width: 100%;
    height: 200px !important;
}

.modal-content {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

/* Responsive Styles */
@media (max-width: 768px) {
    #info, #colorLegend { 
        max-width: 40%; 
        font-size: 11px; 
    }
    #gradientContainer { 
        width: 150px; 
    }
    #mapPanel { 
        width: 200px; 
        height: 150px; 
    }
    .dg.ac { 
        top: 170px !important; 
    }
    #heightDistributionModal { 
        width: 300px; 
    }
    #heightDistributionChart { 
        height: 150px; 
    }
}