body { margin: 0; background: #111; color: #ddd; font-family: system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial; }
#ui { position: fixed; left: 12px; top: 12px; z-index: 30; }
button { margin-right: 8px; }
.hint { opacity: 0.8; font-size: 13px; margin-top:6px; }
a { color: #8fd; }