body {
    font-family: Arial, Helvetica, sans-serif;
    background-color: #f4f4f4;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    padding: 0;
}

h1 {
    color: #333;
}

button {
    background-color: #4CAF50;
    color: white;
    padding: 15px 32px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    margin: 4px 2px;
    cursor: pointer;
    border: none;
    border-radius: 4px;
}

button:hover {
    background-color: #45a049;
}

p#result {
    font-size: 1.5em;
    color: #333;
}