body {
    font-family: sans-serif;
    padding: 2rem;
    background: #fdfdfd;
    text-align: center;
}

#preview {
    margin: 2rem auto;
    border: 1px dashed #aaa;
    width: 500px;
    height: 150px;
}

svg {
    width: 100%;
    height: 100%;
}

input,
select,
button {
    padding: 0.5rem;
    margin: 0.5rem;
    font-size: 1rem;
}