function preview({path, title, author = "Observable", thumbnail}) {
return htl.html`<a href="/${encodeURI(path)}" target="_blank" title="${title} by ${author}" style="display: inline-flex; flex-direction: column; align-items: start; font: 400 .75rem var(--sans-serif); color: #1b1e23; width: 100%;" onmouseover=${event => event.currentTarget.firstElementChild.style.borderColor = "#1b1e23"} onmouseout=${event => event.currentTarget.firstElementChild.style.borderColor = "#e8e8e8"}>
<div style="border: solid 1px #e8e8e8; border-radius: 4px; box-sizing: border-box; width: 100%; padding-top: 62.5%; background-size: cover; background-image: url(https://static.observableusercontent.com/thumbnail/${encodeURI(thumbnail)}.jpg);"></div>
<div style="width: 100%; white-space: nowrap; text-overflow: ellipsis; overflow: hidden;">${title}</div>
</a>`;
}