* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 20px;
        }
        
        .container {
            background-color: white;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            padding: 30px;
            width: 100%;
            max-width: 600px;
            transition: all 0.3s ease;
        }
        
        h1 {
            color: #2c3e50;
            text-align: center;
            margin-bottom: 25px;
            font-size: 1.8rem;
            font-weight: 600;
        }
        
        .form-group {
            margin-bottom: 20px;
        }
        
        label {
            display: block;
            margin-bottom: 8px;
            color: #34495e;
            font-weight: 500;
        }
        
        input, select {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #ddd;
            border-radius: 8px;
            font-size: 16px;
            transition: all 0.3s;
            background-color: #f8f9fa;
        }
        
        input:focus, select:focus {
            outline: none;
            border-color: #3498db;
            box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
        }
        
        button {
            width: 100%;
            padding: 14px;
            background: linear-gradient(to right, #3498db, #2980b9);
            color: white;
            border: none;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
            margin-top: 10px;
        }
        
        button:hover {
            background: linear-gradient(to right, #2980b9, #2573a7);
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }
        
        button:active {
            transform: translateY(0);
        }
        
        .result {
            margin-top: 25px;
            padding: 20px;
            background-color: #f8f9fa;
            border-radius: 8px;
            display: none;
            border-left: 4px solid #3498db;
        }
        
        .result h2 {
            color: #2c3e50;
            margin-bottom: 15px;
            font-size: 1.4rem;
        }
        
        .result-item {
            display: flex;
            justify-content: space-between;
            padding: 10px 0;
            border-bottom: 1px solid #eaeaea;
        }
        
        .result-item:last-child {
            border-bottom: none;
        }
        
        .result-label {
            color: #7f8c8d;
        }
        
        .result-value {
            color: #2c3e50;
            font-weight: 600;
        }
        
        .highlight {
            color: #e74c3c;
            font-weight: 700;
        }
        
        /* Адаптивность для мобильных устройств */
        @media (max-width: 768px) {
            .container {
                padding: 20px;
            }
            
            h1 {
                font-size: 1.5rem;
            }
            
            input, select, button {
                padding: 10px 12px;
            }
        }
        
        @media (max-width: 480px) {
            body {
                padding: 10px;
            }
            
            .container {
                padding: 15px;
            }
            
            h1 {
                font-size: 1.3rem;
            }
            
            .result h2 {
                font-size: 1.2rem;
            }
        }