body {
  margin: 0;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
  overflow: hidden;
}

#playBtn {
  width: 70vw;
  height: 70vw;
  max-width: 400px;
  max-height: 400px;
  border-radius: 50%;
  border: none;
  padding: 0;
  margin: 0;
  overflow: hidden;
  box-shadow: 0 12px 25px rgba(0,0,0,0.6);
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

#playBtn:hover {
  transform: scale(1.05);
  box-shadow: 0 16px 35px rgba(0,0,0,0.7);
}

#playBtn img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

video {
  display: none;
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  object-fit: cover;
  background: black;
}

video::-webkit-media-controls { 
  display: none !important; 
}