html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  overflow: hidden;
  font-family: Arial, sans-serif;
  background: #000;
  color: #fff;
  text-align: center;
}

h1 {
  margin: 10px 0;
  font-size: 1.5em;
  background: #222;
  padding: 10px 0;
}

#video, #canvas {
  position: fixed;
  top: 50px;
  left: 0;
  width: 100vw;
  height: calc(100vh - 50px);
  object-fit: cover;
  z-index: 1;
  pointer-events: none; /* Allow clicks to pass through canvas */
}

#canvas {
  z-index: 2;
  pointer-events: none; /* Allow clicks to pass through canvas */
}

#sizeResult {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 2em;
  font-weight: bold;
  background: #FFC107;
  color: #000;
  padding: 10px 20px;
  border-radius: 10px;
  z-index: 3;
  border: 2px solid #000;
}