:root {
       
            --sun-color: #f39c12;
            --horizon-color: #3498db;
        }.summary-value {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--sun-color);
    margin-bottom: 0.2rem;
}.summary-label {
    color: var(--text-muted);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
        .page-header {
            background: linear-gradient(135deg, rgba(243, 156, 18, 0.2) 0%, rgba(52, 152, 219, 0.3) 100%);
            padding: 1.5rem 0;
            margin-bottom: 2rem;
            border-bottom: 1px solid rgba(243, 156, 18, 0.3);
            position: relative;
            overflow: hidden;  color: var(--text-color);
        }
        .breadcrumb {
            background-color: transparent;
            padding: 0.5rem 0;
            margin-bottom: 0.5rem;
        }
        .breadcrumb-item a {
            color: var(--text-muted);
            text-decoration: none;
        }
        .breadcrumb-item.active {
            color: var(--text-color);
        }
        .form-control:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(44, 125, 160, 0.15);
        }
        .math-result {
            padding: 12px;
            background-color: white;
            border-radius: 4px;
            border: 1px solid #eee;
            font-size: 1.1rem;
            font-family: 'Segoe UI', system-ui, sans-serif;
            margin: 10px 0;
            text-align: center;
        }
        .sun-equation {
            font-size: 1.3rem;
            padding: 15px;
            background-color: rgba(243, 156, 18, 0.1);
            border-left: 4px solid var(--sun-color);
            border-radius: 4px;
            margin: 15px 0;
        }
        .astro-box {
            background-color: rgba(52, 152, 219, 0.05);
            border-left: 3px solid var(--horizon-color);
            padding: 1rem;
            border-radius: 0 4px 4px 0;
            margin: 1.5rem 0;
        }
        @media (max-width: 768px) {
            }
        .city-examples {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .city-btn {
            background-color: rgba(243, 156, 18, 0.1);
            border: 1px solid rgba(243, 156, 18, 0.3);
            border-radius: 4px;
            padding: 0.5rem 0.75rem;
            font-size: 0.9rem;
            color: #b85e00;
            cursor: pointer;
            transition: all 0.2s;
            font-weight: 500;
        }
        .city-btn:hover {
            background-color: rgba(243, 156, 18, 0.2);
            transform: translateY(-2px);
        }
        .coord-badge {
            background-color: rgba(52, 152, 219, 0.1);
            padding: 0.4rem 0.8rem;
            border-radius: 30px;
            font-size: 0.9rem;
            display: inline-block;
            margin-right: 0.5rem;
            margin-bottom: 0.5rem;
        }
        .graph-legend {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 1.5rem;
            margin-top: 1rem;
        }
        .legend-item {
            display: flex;
            align-items: center;
        }
        .legend-color {
            width: 20px;
            height: 4px;
            margin-right: 0.5rem;
        }
        .sun-alt-color {
            background-color: var(--sun-color);
        }
        .horizon-line {
            background-color: var(--horizon-color);
        }
        .validation-note {
            background-color: #e8f4fd;
            border-left: 4px solid #2c7da0;
            padding: 0.75rem 1rem;
            border-radius: 4px;
            font-size: 0.9rem;
            margin: 1rem 0;
        }
        .validation-note i {
            color: #2c7da0;
            margin-right: 0.5rem;
        }
        .nav-tabs .nav-tabs .tab-pane {
            padding-top: 1.5rem;
        }
        #map {
            height: 350px;
            border-radius: 8px;
            border: 1px solid var(--border-color);
            z-index: 1;
        }
        .map-instruction {
            margin-top: 0.5rem;
            color: var(--text-muted);
            font-size: 0.9rem;
        }