body.center{font-family:sans-serif;text-align:center;background:#f8f6f3;padding:20px}
.booth{max-width:420px;width:100%}
video,canvas{width:100%;max-width:420px;border-radius:8px;background:#000}
.primary{padding:12px 20px;font-size:16px}
.slot{max-width:280px;margin:20px auto;display:block}
button{margin:8px;padding:10px 16px}