body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 20px;
    background-color: #f4f4f4;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1 {
    color: #333;
}

form {
    margin-bottom: 20px;
}

label {
    font-weight: bold;
}

input[type="text"] {
    padding: 8px;
    width: 200px;
    margin-right: 10px;
}

button {
    padding: 8px 16px;
    background-color: #007BFF;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

button:hover {
    background-color: #0056b3;
}

.error {
    color: red;
    margin-top: 10px;
}

.result {
    margin-top: 20px;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

.result h2 {
    margin-top: 0;
    color: #007BFF;
}

.result p {
    margin: 5px 0;
}