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

label {
    display: block;
    margin-top: 10px;
}

input, select {
    width: 300px;
    padding: 5px;
}

input[type="submit"] {
    margin-top: 20px;
    padding: 10px 20px;
}

#contract-output {
    margin-top: 40px;
    border-top: 1px solid #ccc;
    padding-top: 20px;
}