html, body {
  margin: 0;
  padding: 0;
  height: 100vh;
  width: 100vw;
  background-color: #fdfdfd;
}

canvas {
  display: block;
  aspect-ratio: 1024/1305;
  max-width: 80vw;
  max-height: calc(100vh - 48px);
  width: auto !important;
  height: auto !important;
  position: absolute;
  z-index: 1;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  box-shadow: 4px 6px 8px rgba(0,0,0,.18);
  border: 4px solid #fff;
  border-radius: 8px;
}

label {
  z-index: 2;
  position: absolute;
  background-color: #fff;
  padding: 8px;
  border-radius: 4px;
  bottom: 20px;
  right: 20px;
}