body {
  background-color: #fff; 
  margin: 0;
}

#transition-wrapper {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: #fff;
  z-index: 9999;
  transition: opacity 0.4s ease; 
}

#transition-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}