.stage{ grid-area:stage; position:relative; }
canvas{ display:block; width:100%; height:100%; background:var(--bg); cursor:crosshair; }
.hint{
  position:absolute;
  left:10px; bottom:10px;
  background:#0b0e16b3;
  border:1px solid #2a2f43;
  color:#cdd6f4;
  padding:8px 10px;
  border-radius:10px;
  backdrop-filter:blur(4px);
}
.hint b{ color:#fff; }