/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-primary: #0D47A1;
    --color-secondary: #1976D2;
    --color-selected: #FF5722;
    --color-variant: #FF8A65;
    --color-default: #607D8B;
    --color-bg: #F5F5F5;
    --color-white: #FFFFFF;
    --color-text: #212121;
    --color-text-light: #757575;
    --color-border: #E0E0E0;
    --color-error: #D32F2F;
    --color-success: #388E3C;

    --sidebar-width: 320px;
    --header-height: 80px;
    --footer-height: 40px;

    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.2);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--color-text);
    background: var(--color-bg);
    overflow: hidden;
}

.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    width: 100vw;
}

/* Header */
.app-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: var(--color-white);
    padding: 1rem 2rem;
    box-shadow: var(--shadow-md);
    z-index: 1000;
}

.app-header h1 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.subtitle {
    font-size: 0.875rem;
    opacity: 0.9;
}

/* Main Content */
.main-content {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--color-white);
    box-shadow: var(--shadow-md);
    overflow-y: auto;
    z-index: 500;
}

.control-panel {
    padding: 1.5rem;
}

.control-panel h2 {
    font-size: 1.125rem;
    color: var(--color-primary);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--color-border);
}

.control-panel h3 {
    font-size: 1rem;
    color: var(--color-primary);
    margin-bottom: 0.75rem;
}

.control-panel h4 {
    font-size: 0.875rem;
    color: var(--color-text);
    margin-bottom: 0.5rem;
    margin-top: 0.75rem;
}

/* Selector Group */
.selector-group {
    margin-bottom: 1.5rem;
}

.selector-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

.road-selector {
    width: 100%;
    padding: 0.625rem 0.75rem;
    font-size: 0.9375rem;
    border: 2px solid var(--color-border);
    border-radius: 4px;
    background: var(--color-white);
    color: var(--color-text);
    cursor: pointer;
    transition: all 0.2s ease;
}

.road-selector:hover {
    border-color: var(--color-secondary);
}

.road-selector:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(13, 71, 161, 0.1);
}

/* Loading Indicator */
.loading {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    background: var(--color-bg);
    border-radius: 4px;
    margin-bottom: 1rem;
}

.spinner {
    width: 20px;
    height: 20px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Statistics Panel */
.stats-panel {
    background: var(--color-bg);
    border-radius: 4px;
    padding: 1rem;
    margin-bottom: 1.5rem;
}

.stat-item {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--color-border);
}

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

.stat-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-light);
}

.stat-value {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text);
    text-align: right;
    flex: 1;
    margin-left: 1rem;
}

/* Error Message */
.error-message {
    padding: 1rem;
    background: #FFEBEE;
    color: var(--color-error);
    border-left: 4px solid var(--color-error);
    border-radius: 4px;
    margin-bottom: 1rem;
    font-size: 0.875rem;
}

/* Legend */
.legend {
    background: var(--color-bg);
    border-radius: 4px;
    padding: 1rem;
    margin-top: 1.5rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.625rem;
    font-size: 0.875rem;
}

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

.legend-section {
    margin-top: 1rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--color-border);
}

.legend-section h4 {
    font-size: 0.8125rem;
    color: var(--color-text-light);
    margin-bottom: 0.5rem;
}

.legend-color {
    width: 24px;
    height: 4px;
    border-radius: 2px;
    flex-shrink: 0;
}

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

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

/* Footer */
.app-footer {
    background: var(--color-white);
    padding: 0.75rem 2rem;
    text-align: center;
    font-size: 0.75rem;
    color: var(--color-text-light);
    box-shadow: 0 -2px 4px rgba(0, 0, 0, 0.05);
}

/* Utility Classes */
.hidden {
    display: none !important;
}

/* MapLibre Popup Customization */
.maplibregl-popup-content {
    border-radius: 4px;
    box-shadow: var(--shadow-lg);
    padding: 0.75rem 1rem;
    font-family: inherit;
}

.maplibregl-popup-close-button {
    font-size: 1.25rem;
    padding: 0.25rem 0.5rem;
}

/* Layer Switcher Customization */
.maplibregl-layer-switcher {
    background: var(--color-white);
    border-radius: 4px;
    box-shadow: var(--shadow-md);
    padding: 0.5rem;
    font-family: inherit;
}

.maplibregl-layer-switcher label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 0.5rem;
    cursor: pointer;
    font-size: 0.875rem;
    border-radius: 3px;
    transition: background 0.2s ease;
}

.maplibregl-layer-switcher label:hover {
    background: var(--color-bg);
}

.maplibregl-layer-switcher input[type="radio"] {
    accent-color: var(--color-primary);
}

.popup-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

.popup-info {
    font-size: 0.875rem;
    color: var(--color-text);
}

/* Clear Button */
.clear-btn {
    width: 100%;
    padding: 0.625rem 1rem;
    margin-top: 1rem;
    background: var(--color-error);
    color: var(--color-white);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.clear-btn:hover {
    background: #B71C1C;
    transform: translateY(-1px);
}

.clear-btn:active {
    transform: translateY(0);
}

/* Mobile Sidebar Toggle */
.sidebar-toggle {
    display: none;
    width: 100%;
    padding: 0.875rem 1rem;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: var(--color-white);
    border: none;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-size: 0.9375rem;
    font-weight: 500;
}

.sidebar-toggle .toggle-icon {
    transition: transform 0.3s ease;
}

.sidebar.expanded .sidebar-toggle .toggle-icon {
    transform: rotate(180deg);
}

/* Responsive Design */
@media (max-width: 768px) {
    .main-content {
        flex-direction: column;
        position: relative;
    }

    .sidebar {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        width: 100%;
        max-height: 56px;
        overflow: hidden;
        transition: max-height 0.3s ease;
        z-index: 1000;
        box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.15);
    }

    .sidebar.expanded {
        max-height: 70vh;
        overflow-y: auto;
    }

    .sidebar-toggle {
        display: flex;
    }

    .sidebar .control-panel {
        max-height: calc(70vh - 56px);
        overflow-y: auto;
    }

    .map-container {
        order: 1;
        height: calc(100vh - 80px - 56px - 40px);
        min-height: unset;
    }

    .app-header h1 {
        font-size: 1.25rem;
    }

    .subtitle {
        font-size: 0.75rem;
    }
}

@media (max-width: 480px) {
    :root {
        --sidebar-width: 100%;
    }

    .app-header {
        padding: 0.75rem 1rem;
    }

    .control-panel {
        padding: 1rem;
    }

    .app-footer {
        padding: 0.5rem 1rem;
        font-size: 0.625rem;
    }
}

/* Print Styles */
@media print {
    .sidebar {
        display: none;
    }

    .map-container {
        width: 100%;
    }
}