:root[data-theme="light"] {
  --ts-primary:#0065bd; --ts-bg:#fff;   --ts-text:#111;
}
:root[data-theme="dark"]  {
  --ts-primary:#4ea8ff; --ts-bg:#1e1e1e;--ts-text:#eee;
}

*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,segoe ui,Roboto,sans-serif;
     background:var(--ts-bg);color:var(--ts-text)}
#ts-root{padding:1rem}
.ts-btn{background:var(--ts-primary);color:#fff;border:0;padding:.6rem 1rem;
        border-radius:.3rem;cursor:pointer}
nav .ts-btn {
  margin-right: .5rem;
  margin-bottom: .5rem;
}