:root{color-scheme:light dark;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}body{margin:0;background:var(--tg-theme-bg-color, #0f0f10);color:var(--tg-theme-text-color, #fff)}.app{min-height:100dvh;display:flex;align-items:center;justify-content:center;padding:24px;text-align:center}.error{color:#ff6b6b}