body {
  background: linear-gradient(to right, #0f1115, #1c1f26);
  color: white;
  text-align: center;
  padding: 3rem;
}
.face-btn {
  margin: 1rem;
  padding: 1rem 2rem;
  font-size: 1.2rem;
}
video {
  width: 320px;
  border-radius: 1rem;
  box-shadow: 0 0 20px rgba(0, 170, 255, 0.3);
  margin-top: 1rem;
}