body {
    font-family: Arial, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    margin: 0;
    background-color: #f0f0f0;
}

h1 {
    color: #333;
}

label, input, button {
    margin: 10px 0;
}

input, button {
    padding: 10px;
    font-size: 16px;
}

button {
    background-color: #007BFF;
    color: white;
    border: none;
    cursor: pointer;
}

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

#fibonacciResult {
    margin-top: 20px;
    font-size: 18px;
    color: #555;
}