#stage{position:relative}
#voice{
  position:absolute; left:50%; top:50%; translate:-50% -50%;
  --R:min(62vmin,640px); width:var(--R); height:var(--R);
    z-index:12;
  display:flex; align-items:center; justify-content:center; text-align:center;
  padding:5vmin; color:#E8F6F3; line-height:1.85;
  font:500 clamp(15px,2.1vmin,20px)/1.85 ui-sans-serif,-apple-system,system-ui,
        "Helvetica Neue",Arial,"Noto Sans JP","Hiragino Sans","Yu Gothic",Meiryo,sans-serif;
  background:radial-gradient(60% 60% at 50% 50%, rgba(8,16,20,.22), transparent 60%);
  pointer-events:none;
}
#voice p{margin:.45em 0}
#ask{
  position:absolute; left:50%; bottom:16px; translate:-50% 0; z-index:13;
  width:min(92vw,880px); display:flex; gap:8px;
}
#ask input{
  flex:1; padding:14px 16px; border-radius:999px; outline:0;
  background:rgba(12,20,26,.55); color:#e9f5f2;
  border:1px solid rgba(160,225,219,.3);
}
#ask button{
  min-width:46px; border-radius:999px; padding:0 16px;
  background:rgba(160,225,219,.18); color:#dff;
  border:1px solid rgba(160,225,219,.55);
}