:root { color-scheme: dark; }
html, body { background:#000; color:#e6e6e6; }
button, .btn { background:#1f2937; color:#e6e6e6; border:1px solid #334155; }
button:hover, .btn:hover { background:#2a374a; }
input, select, textarea { background:#0f172a; color:#e6e6e6; border:1px solid #334155; }