defaultCSS = html`
[CSS style declaration]
<style>
hr {
/* make HR a little darker */
background-image: linear-gradient(90deg, rgba(0, 0, 0, 0.25), rgba(0, 0, 0, 0.25));
margin: 1em 0;
}
code {
/* make code snippets in text stand out more */
font-weight: bold;
background-color: #f0f0f0;
padding: 0.1em 0.4em;
}
svg {
background-color: #fafafa;
border: 1px solid #dddddd;
max-width: 100%; /* mobile friendly */
}
input[type=number] {
display: inline-block;
width: 4em;
}
</style>
`