body {
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
  background: #f0f0f0;
  font-family: sans-serif;
}

model-viewer {
  width: 100%;
  max-width: 600px;
  height: 500px;
  background: #fff;
}

.custom-ar-button {
  background: #4285f4;
  color: white;
  border: none;
  padding: 12px 24px;
  border-radius: 6px;
  margin-top: 10px;
  font-size: 16px;
}