html, body {
  margin: 0;
  height: 100%;
  background: #1b120c;
  overflow: hidden;
  overscroll-behavior: none;
  /* No browser gestures anywhere: scrolling, zoom, callouts, selection. */
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
  -webkit-tap-highlight-color: transparent;
}
body {
  display: flex;
  align-items: center;
  justify-content: center;
}
canvas {
  display: block;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
  -webkit-tap-highlight-color: transparent;
  outline: none;
}
#rotate {
  position: fixed;
  inset: 0;
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  background: #1b120c;
  color: #f5ecd9;
  font: 700 18px system-ui, -apple-system, "Hiragino Sans", "Noto Sans", sans-serif;
}
#rotate[hidden] {
  display: none;
}
#rotate p {
  margin: 0;
}
#rotate .phone {
  width: 30px;
  height: 52px;
  border: 3px solid #f5ecd9;
  border-radius: 7px;
  animation: turn 1.8s ease-in-out infinite;
}
@keyframes turn {
  0%, 25% { transform: rotate(-90deg); }
  60%, 100% { transform: rotate(0deg); }
}