/* Theme helpers (works with your existing CSS too) */
body.dark{background:#0b0c10;color:#e8e8e8}
body.light{background:#ffffff;color:#000000}
body.light header{background:#f3f5f8;color:#000}
body.light .controls select,
body.light .controls input,
body.light .controls button{background:#fff;color:#000;border:1px solid #ccc}