* {
  margin: 0;
  padding: 0;
}
body {
  background: #000;
}
.webcam {
  width: 100%;
  display: flex;
  height: 100vh;
}
.webcam video {
  display: none;
}
.webcam canvas {
  background: green;
  margin: auto;
  display: block;
}
.webcam .buttons {
  position: absolute;
  bottom: 0;
  width: 200px;
  left: 50%;
  margin-left: -100px;
  bottom: 5px;
}
.webcam button {
  visibility: hidden;
  margin: 0 10px;
  background: rgba(0, 0, 0, 0.5);
  color: rgba(255, 255, 255, 0.5);
  border: none;
  font-size: 16px;
  cursor: pointer;
  padding: 20px;
}
.webcam .buttons:hover button {
  visibility: visible;
}
.webcam button:hover {
  color: #fff;
}