html, body {
    width: 100%;
    /* Fill the large viewport so the Compose canvas paints edge-to-edge behind the
       Android three-button nav bar (no white/dark strip). The interactive bottom bar
       is kept above the nav bar on the Compose side via LocalBottomSafeInset, which
       measures the nav-bar height (100lvh minus the layout viewport) and pads for it. */
    height: 100vh;
    height: 100lvh;
    margin: 0;
    padding: 0;
    overflow: hidden;
    /* Painted behind the nav bar so that region never flashes white. */
    background-color: #05060A;
}