body {
  font-family: Arial, sans-serif;
  padding: 20px;
}
video {
  width: 100%;
  max-width: 400px;
  border: 2px solid #333;
}
img {
  margin-top: 10px;
  border: 2px solid #555;
}
input {
  width: 150px;
  font-size: 1.5rem;
  text-align: center;
}
button {
  padding: 10px 20px;
  margin-top: 10px;
}