:root{font-family:system-ui,-apple-system,Segoe UI,sans-serif;line-height:1.5;color-scheme:light dark}body{margin:0;background:var(--tg-theme-bg-color, #111);color:var(--tg-theme-text-color, #eee);min-height:100vh}button{font:inherit;padding:12px 16px;border:1px solid var(--tg-theme-section-separator-color, #444);border-radius:8px;background:var(--tg-theme-button-color, #2a72d4);color:var(--tg-theme-button-text-color, #fff);cursor:pointer}button:disabled{opacity:.5;cursor:not-allowed}