body {
  background: #111;
  color: #eee;
  font-family: sans-serif;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  margin: 0;
}
.container {
  text-align: center;
  max-width: 700px;
  width: 90%;
}
video {
  width: 100%;
  height: auto;
  margin-bottom: 20px;
  border: 2px solid #333;
}
button {
  padding: 10px 20px;
  font-size: 1.2em;
  background: #444;
  color: white;
  border: none;
  cursor: pointer;
  border-radius: 5px;
}
button:hover {
  background: #666;
}