body {
            font-family: 'Arial', sans-serif;
            margin: 0;
            padding: 15px;
            background: white;
            color: #333;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: white;
            border-radius: 15px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.1);
            overflow: hidden;
        }
        
        .header {
            background: linear-gradient(135deg, #2c5530 0%, #4CAF50 100%);
            color: white;
            padding: 25px 20px;
            text-align: center;
        }
        
        .header h1 {
            margin: 0 0 10px 0;
            font-size: 28px;
            font-weight: bold;
        }
        
        .header p {
            margin: 5px 0;
            opacity: 0.9;
            font-size: 14px;
        }
        
        .controls {
            padding: 25px;
            background: #f8f9fa;
            display: flex;
            gap: 15px;
            flex-wrap: wrap;
            align-items: flex-end;
            border-bottom: 1px solid #e0e0e0;
        }
        
        .control-group {
            display: flex;
            flex-direction: column;
            gap: 5px;
        }
        
        .control-group label {
            font-weight: 600;
            color: #2c5530;
            font-size: 13px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        
        .control-group input {
            padding: 10px 12px;
            border: 2px solid #4CAF50;
            border-radius: 8px;
            font-size: 14px;
            width: 60px;
        }
        
        .control-group input:focus {
            outline: none;
            border-color: #2c5530;
        }
        
        .btn {
            padding: 10px 25px;
            background: linear-gradient(135deg, #2c5530 0%, #4CAF50 100%);
            color: white;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            font-weight: 600;
            font-size: 14px;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        
        .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(44, 85, 48, 0.3);
        }
        
        .chart-container {
            padding: 25px;
            position: relative;
            height: 450px;
            background: linear-gradient(to bottom, #fafafa, #ffffff);
        }
        
        .stats {
            display: flex;
            justify-content: space-around;
            padding: 25px;
            background: #f8f9fa;
            flex-wrap: wrap;
            gap: 15px;
        }
        
        .stat-box {
            text-align: center;
            padding: 18px;
            background: white;
            border-radius: 12px;
            box-shadow: 0 3px 10px rgba(0,0,0,0.08);
            flex: 1;
            min-width: 140px;
            border-left: 4px solid #4CAF50;
        }
        
        .stat-box.max {
            border-left-color: #FF6B6B;
        }
        
        .stat-box.min {
            border-left-color: #66BB6A;
        }
        
        .stat-value {
            font-size: 24px;
            font-weight: bold;
            color: #2c5530;
            margin-bottom: 5px;
            font-family: 'Courier New', monospace;
        }
        
        .stat-box.max .stat-value {
            color: #FF6B6B;
        }
        
        .stat-box.min .stat-value {
            color: #66BB6A;
        }
        
        .stat-label {
            font-size: 11px;
            color: #888;
            text-transform: uppercase;
            letter-spacing: 1px;
            font-weight: 600;
        }
        
        .info {
            padding: 25px;
            background: linear-gradient(135deg, #e3f2fd 0%, #f3e5f5 100%);
            font-size: 14px;
            color: #333;
            line-height: 1.6;
            border-top: 2px solid #2196F3;
        }
        
        .error {
            padding: 20px;
            background: #ffebee;
            color: #c62828;
            text-align: center;
            font-weight: bold;
            border-left: 4px solid #d32f2f;
            border-radius: 8px;
            margin: 20px;
        }
        
        .loading {
            padding: 20px;
            text-align: center;
            color: #666;
            font-style: italic;
        }
        
        .footer {
            padding: 18px 25px;
            background: linear-gradient(135deg, #f5f5f5 0%, #e8e8e8 100%);
            text-align: center;
            font-size: 12px;
            color: #666;
            border-top: 1px solid #e0e0e0;
        }
        
        .footer a {
            color: #4CAF50;
            text-decoration: none;
            font-weight: 600;
        }
        
        .hidden {
            display: none;
        }
        
        @media (max-width: 768px) {
            .controls {
                flex-direction: column;
                align-items: stretch;
            }
            
            .control-group input {
                max-width: 70px;
        min-width: 70px;
            }
            
            .header h1 {
                font-size: 22px;
            }
            
            .chart-container {
                height: 300px;
                padding: 15px;
            }
            
            .stats {
                flex-direction: column;
            }
        }