body, html {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
  background: #000;
}
video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
#durationDisplay {
  position: absolute;
  top: 10px;
  left: 10px;
  color: white;
  background: rgba(0, 0, 0, 0.7);
  padding: 5px;
  border-radius: 3px;
  font-family: Arial, sans-serif;
}
#playButton {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  padding: 15px 30px;
  font-size: 18px;
  background: #007bff;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  display: none;
}
#playButton:hover {
  background: #0056b3;
}
#offlineMessage {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: white;
  background: rgba(255, 0, 0, 0.8);
  padding: 10px 20px;
  border-radius: 5px;
  font-family: Arial, sans-serif;
  display: none;
}