/* Extracted from index.html. Loaded in the same position the inline
   <style> occupied, so the cascade is unchanged. */
        * {
            margin: 0;
            padding: 0;
        }
        html, body {
            width: 100%;
            height: 100%;
            overflow: hidden;
            /* The inner site is black. Without this the cloak page behind the
               iframe is default white, and every in-frame navigation flashes
               it through the instant the iframe is between documents. Safe
               here (unlike ui.css) because index.html has no particle/aurora
               backdrop of its own to break. */
            background: #000;
            color-scheme: dark;
        }
        iframe {
            width: 100%;
            height: 100%;
            border: none;
            /* Without this the iframe is inline and sits on the text baseline,
               leaving a few px of descender space below it — enough to push a
               scrollbar onto the page. */
            display: block;
            background: #000;
        }