pub const APP_CSS: &[u8] = b":root {\n color-scheme: dark light;\n font-family: ui-sans-serif, system-ui, -apple-system, sans-serif;\n}\nbody {\n margin: 0;\n padding: 1rem;\n}\ncanvas {\n background: #111;\n width: 100%;\n max-width: 1280px;\n height: auto;\n border: 1px solid #555;\n}\n";