.canvas-shell {
  position: relative;
  width: min(100%, 310px);
  margin: 1rem auto;
  aspect-ratio: 9 / 16;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: 18px;
  background: #05040c;
  box-shadow: 0 24px 70px rgba(0, 0, 0, .42);
}

.canvas-shell canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.canvas-shell span {
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 12px;
  padding: .65rem .8rem;
  border: 1px solid rgba(255, 255, 255, .14);
  border-radius: 999px;
  background: rgba(4, 3, 10, .62);
  color: rgba(255, 255, 255, .78);
  font-size: .65rem;
  text-align: center;
  backdrop-filter: blur(12px);
}

.canvas-controls {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .55rem;
}

.canvas-controls .button { padding-inline: .7rem; }
.canvas-note { margin: .9rem 0 0; font-size: .7rem; }

@media (max-width: 800px) {
  .canvas-shell { width: min(82vw, 330px); }
}