body {
            font-family: Arial, sans-serif;
            background: #f5f5f5;
            margin: 0;
            padding: 0;
        }
        
        .container {
            max-width: 600px;
            margin: 50px auto;
            background: #fff;
            padding: 20px;
            box-shadow: 0 0 10px rgba(0,0,0,0.1);
            border-radius: 8px;
        }
        
        h1 {
            text-align: center;
            color: #333;
            margin-bottom: 30px;
        }
        
        .tariff-block {
            background: #f9f9f9;
            padding: 20px;
            border-radius: 5px;
            margin-bottom: 20px;
        }
        
        .tariff {
            display: flex;
            align-items: center;
            margin-bottom: 15px;
        }
        
        .tariff input[type="radio"] {
            margin-right: 10px;
            transform: scale(1.5);
        }
        
        .personal-info {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
        }
        
        input[type="text"],
        input[type="tel"] {
            width: 100%;
            padding: 10px;
            border: 1px solid #ddd;
            border-radius: 4px;
        }
        
        button {
            background: #007bff;
            color: #fff;
            padding: 10px 20px;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            margin-top: 20px;
        }
        
        button:hover {
            background: #0056b3;
        }
        
        @media (max-width: 600px) {
            .personal-info {
                flex-direction: column;
            }
        }