body {
  background: #f3f3f3;
  color: #222;
  text-align: center;
  font-family: Arial, sans-serif;
}
video {
  width: 480px;
  height: 360px;
  border-radius: 12px;
  box-shadow: 0 4px 20px #0003;
  margin-top: 1em;
  background: #222;
}
button {
  margin: 0.8em 0.4em;
  padding: 0.7em 1.4em;
  font-size: 1.1em;
  border-radius: 8px;
  border: none;
  background: #0072e3;
  color: #fff;
  cursor: pointer;
}
button:active {
  background: #005bb5;
}
canvas {
  display: none;
}
img#art-img {
  border-radius: 12px;
  box-shadow: 0 4px 20px #0002;
  border: 2px solid #0072e3;
}