html, body {
  margin: 0;
  padding: 0;
  overflow: hidden;
  background: #0a1a2f;
  height: 100%; /* add this */
  width: 100%;  /* add this */
}

canvas {
  display: block;
  position: fixed; /* fix canvas position */
  top: 0;
  left: 0;
  width: 100vw;  /* make sure canvas fills viewport */
  height: 100vh;
}

.label {
  position: absolute;
  background: rgba(0, 0, 0, 0.75);
  color: white;
  padding: 4px 8px;
  font-size: 13px;
  border-radius: 5px;
  pointer-events: none;
  display: none;
}

/* 🔁 Rotate Notice Styling */
#rotate-notice {
  display: none;  /* keep hidden by default */
  position: fixed;
  top: 0; left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0,0,0,0.9);
  color: white;
  font-size: 1.5rem;
  text-align: center;
  z-index: 9999;
  padding: 30px;
  display: flex; /* add this */
  align-items: center;
  justify-content: center;
  flex-direction: column;
}