body {
  margin: 0;
  padding: 0;
  height: 100vh;
  overflow: hidden;
  background: black;
}

video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: fixed;
  top: 0;
  left: 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.5s ease-in-out, visibility 0.5s ease-in-out;
}

#overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: black;
  z-index: 500;
}

#playButton {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 1000;
  padding: 15px 30px;
  font-size: 18px;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border: 2px solid white;
  border-radius: 5px;
}

#playButton:hover {
  background: rgba(255, 255, 255, 0.2);
}

.video-visible {
  opacity: 1 !important;
  visibility: visible !important;
}