html, body {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden;
    /*
     * The app's own background (DoozDarkPalette.background), set here rather than left to the
     * browser's white. It matters twice: while the ~13 MB wasm bundle downloads, and again on every
     * resize, where the canvas briefly lags the viewport and the gap shows through.
     */
    background: #100D0B;
}