html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: black;
}

.container {
  position: relative;
  width: 100vw;
  height: 100vh;
  background: black;
  overflow: hidden;
}

video {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: black;
}

#playBtn {
  position: absolute;
  inset: 0;
  margin: auto;
  background: rgba(0, 0, 0, 0.75);
  color: white;
  border: none;
  padding: 20px 30px;
  font-size: 20px;
  cursor: pointer;
  transition:
    opacity 0.4s ease,
    transform 0.4s ease;
}

#playBtn.fade-out {
  opacity: 0;
  transform: scale(0.95);
  pointer-events: none;
}