:root {
            --primary-color: #2c7da0;
            --secondary-color: #a9d6e5;
            --accent-color: #01497c;
            --light-gray: #f8f9fa;
            --border-color: #eaeaea;
            --text-color: #333;
            --text-muted: #6c757d;
            --header-bg: #f0f4f8;
            --success-color: #28a745;
            --warning-color: #ffc107;
            --danger-color: #dc3545;
        }.list-group-flush {
    border-radius: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(313px, 1fr));
    gap: 1.5rem;
}
        .timezone-info-card {
    background-color: white;
    border-radius: 8px;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
}.timezone-info-card h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}.timezone-info-card ul {
    padding-left: 1.5rem;
}.daylight-saving-info {
    background-color: #fff3cd;
    border-left: 3px solid #ffc107;
    padding: 1rem;
    border-radius: 0 4px 4px 0;
    margin: 1.5rem 0;
}
        /* Time Display */
        .time-display {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            margin-top: 1.5rem;
        }
        
        .time-card {
            flex: 1;
            min-width: 250px;
            background: white;
            border-radius: 10px;
            padding: 1.5rem;
            border: 1px solid var(--border-color);
            box-shadow: 0 2px 6px rgba(0,0,0,0.05);
            transition: all 0.3s;
        }
        
        .time-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 4px 8px rgba(0,0,0,0.1);
        }
        
        .time-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 1rem;
        }
        
        .time-city {
            font-weight: 600;
            font-size: 1.25rem;
            color: var(--primary-color);
        }
        
        .time-zone {
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        
        .time-value {
            font-size: 2.5rem;
            font-weight: 700;
            text-align: center;
            margin: 1rem 0;
            color: var(--text-color);
        }
        
        .time-date {
            text-align: center;
            color: var(--text-muted);
            margin-bottom: 1rem;
        }
        
        .time-difference {
            text-align: center;
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        
        .time-difference.positive {
            color: var(--success-color);
        }
        
        .time-difference.negative {
            color: var(--danger-color);
        }
        
        /* World Map */
        .world-map-container {
            position: relative;
            width: 100%;
            height: 400px;
            background: #e6f2ff;
            border-radius: 8px;
            overflow: hidden;
            margin-top: 2rem;
        }
        
        #worldMap {
            width: 100%;
            height: 100%;
        }
        
        .map-marker {
            position: absolute;
            width: 12px;
            height: 12px;
            background-color: var(--primary-color);
            border-radius: 50%;
            border: 2px solid white;
            box-shadow: 0 2px 4px rgba(0,0,0,0.2);
            transform: translate(-50%, -50%);
            cursor: pointer;
            z-index: 10;
        }
        
        .map-marker.active {
            width: 16px;
            height: 16px;
            background-color: var(--danger-color);
            z-index: 20;
        }
        
        .map-info {
            position: absolute;
            background: white;
            border-radius: 8px;
            padding: 0.75rem 1rem;
            box-shadow: 0 2px 8px rgba(0,0,0,0.15);
            z-index: 30;
            display: none;
            min-width: 180px;
        }
        
        .map-info-title {
            font-weight: 600;
            margin-bottom: 0.25rem;
        }
        
        .map-info-time {
            font-size: 1.25rem;
            font-weight: 500;
        }
        
        /* Time Comparison */
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            margin-top: 1.5rem;
        }
        
        .comparison-table th, .comparison-table td {
            padding: 1rem;
            text-align: left;
            border-bottom: 1px solid var(--border-color);
        }
        
        .comparison-table th {
            background-color: var(--light-gray);
            font-weight: 600;
        }
        
        .comparison-table tr:hover {
            background-color: rgba(44, 125, 160, 0.05);
        }
        
        /* Time Converter */
        .converter-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 1.5rem;
            margin-top: 1.5rem;
        }
        
        .converter-card {
            background: white;
            border-radius: 8px;
            padding: 1.5rem;
            border: 1px solid var(--border-color);
            box-shadow: 0 2px 6px rgba(0,0,0,0.05);
        }
        
        .converter-header {
            font-weight: 600;
            margin-bottom: 1rem;
            color: var(--primary-color);
        }
        
        .converter-result {
            font-size: 1.5rem;
            font-weight: 600;
            text-align: center;
            margin-top: 1rem;
            padding: 1rem;
            background: rgba(169, 214, 229, 0.15);
            border-radius: 8px;
        }
        
        /* Popular Cities */
        .cities-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 1rem;
            margin-top: 1.5rem;
        }
        
        .city-card {
            background: white;
            border-radius: 8px;
            padding: 1rem;
            text-align: center;
            border: 1px solid var(--border-color);
            box-shadow: 0 2px 6px rgba(0,0,0,0.05);
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .city-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 4px 8px rgba(0,0,0,0.1);
            border-color: var(--primary-color);
        }
        
        .city-name {
            font-weight: 600;
            margin-bottom: 0.25rem;
        }
        
        .city-time {
            font-size: 1.25rem;
            font-weight: 500;
            margin-bottom: 0.5rem;
        }
        
        .city-timezone {
            color: var(--text-muted);
            font-size: 0.8rem;
        }
        
        /* Timezone Info */
        .info-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 1.5rem;
            margin-top: 2rem;
        }
        
        .info-card {
            background: white;
            border-radius: 8px;
            padding: 1.5rem;
            border-left: 3px solid var(--primary-color);
            box-shadow: 0 2px 6px rgba(0,0,0,0.05);
        }
        
        .info-title {
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: var(--primary-color);
        }
        
        .info-image {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 8px;
            margin: 1rem 0;
        }
        
        /* Day/Night Indicator */
        .day-night-indicator {
            display: flex;
            align-items: center;
            margin-top: 0.5rem;
        }
        
        .day-night-icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            margin-right: 0.5rem;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            color: white;
        }
        
        .day {
            background-color: #ffc107;
        }
        
        .night {
            background-color: #343a40;
        }
        
        /* Responsive Adjustments */
        @media (max-width: 767px) {
            .time-display {
                flex-direction: column;
            }
            
            .time-card {
                min-width: 100%;
            }
            
            .world-map-container {
                height: 300px;
            }
        }
        
        /* Animation */
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        .fade-in {
            animation: fadeIn 0.5s ease forwards;
        }
        
        .delay-1 { animation-delay: 0.1s; }
        .delay-2 { animation-delay: 0.2s; }
        .delay-3 { animation-delay: 0.3s; }
        .delay-4 { animation-delay: 0.4s; }
        .delay-5 { animation-delay: 0.5s; }