#demo form {
    background-color: #eee;
    padding: 5px;
    border-radius: 5px;
}

#demo input[type="number"],
select,
textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
    resize: vertical;
}

#demo label {
    padding: 12px 12px 12px 0;
    display: inline-block;
    font-family: "Courier New", Courier, monospace;
}

#demo input[type="button"] {
    background-color: #4caf50;
    color: white;
    padding: 12px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}