body {
    font-family: Arial, sans-serif;
    background-color: #f0f8ff;
    padding: 20px;
}

h1 {
    color: darkblue;
}

input {
    padding: 5px;
    margin: 5px;
}

button {
    padding: 8px 12px;
    margin: 5px;
    background-color: navy;
    color: white;
    border: none;
}

#output {
    margin-top: 20px;
    padding: 10px;
    background: white;
    border: 1px solid gray;
}