body {
    font-family: Arial, sans-serif;
    margin: 20px;
}

h1 {
    text-align: center;
}

div {
    margin-bottom: 20px;
}

input {
    padding: 10px;
    margin-right: 10px;
    width: 300px;
}

button {
    padding: 10px;
}

#result {
    margin-top: 20px;
    padding: 20px;
    border: 1px solid #ccc;
    background-color: #f9f9f9;
}