Constant LANDING_HTML 

const LANDING_HTML: &str = r#"<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>unlit3d</title>
    <style>
      :root {
        color-scheme: dark;
      }
      html,
      body {
        margin: 0;
        padding: 0;
        background: #101014;
        color: #e8e8ee;
        font-family: system-ui, sans-serif;
      }
      main {
        max-width: 40rem;
        margin: 0 auto;
        padding: 4rem 1.5rem;
      }
      h1 {
        margin: 0 0 0.5rem;
        font-size: 2rem;
      }
      p.lede {
        margin: 0 0 2.5rem;
        color: #a0a0b0;
      }
      ul {
        list-style: none;
        margin: 0;
        padding: 0;
        display: grid;
        gap: 1rem;
      }
      li a {
        display: block;
        padding: 1.25rem 1.5rem;
        border: 1px solid #2a2a34;
        border-radius: 0.75rem;
        background: #16161c;
        color: inherit;
        text-decoration: none;
      }
      li a:hover {
        border-color: #4a4a5a;
        background: #1c1c24;
      }
      li strong {
        display: block;
        margin-bottom: 0.25rem;
        font-size: 1.1rem;
      }
      li span {
        color: #a0a0b0;
        font-size: 0.95rem;
      }
    </style>
  </head>
  <body>
    <main>
      <h1>unlit3d</h1>
      <p class="lede">A compact, opinionated 3D rendering library for WebGPU and WebGL2, with simple diffuse lighting and a multi-world runtime beside it.</p>
      <ul>
{{cards}}        <li>
          <a href="./{{docs}}/index.html"><strong>API docs</strong></a>
          <span>The workspace's rustdoc, built from the latest commit.</span>
        </li>
      </ul>
    </main>
  </body>
</html>
"#;

The site’s landing page: what the examples are, and where the docs are.