body {
            font-family: Arial, sans-serif;
            max-width: 600px;
            margin: 20px auto;
            padding: 20px;
            border: 1px solid #ccc;
            border-radius: 10px;
            box-shadow: 2px 2px 10px rgba(0, 0, 0, 0.1);
        }
        h1 {
            text-align: center;
        }
        label {
            display: block;
            margin-top: 10px;
        }
        select, input {
            width: 100%;
            padding: 8px;
            margin-top: 5px;
            border: 1px solid #ccc;
            border-radius: 5px;
        }
        button {
            width: 100%;
            padding: 10px;
            margin-top: 20px;
            background-color: #007BFF;
            color: white;
            border: none;
            border-radius: 5px;
            cursor: pointer;
        }
        button:hover {
            background-color: #0056b3;
        }
        .result {
            margin-top: 20px;
            padding: 10px;
            background-color: #f8f9fa;
            border: 1px solid #ddd;
            border-radius: 5px;
        }

.return-button {
    background-color: #6c757d;
}

.return-button:hover {
    background-color: #5a6268;
}