* { box-sizing: border-box; }
html, body {
  height: 100%;
  margin: 0;
  background: #05060f;
  overflow: hidden;
  font-family: "Hiragino Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
}
#wrap {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}
canvas#game {
  width: min(94vw, calc(94vh * 0.75));
  height: auto;
  aspect-ratio: 3 / 4;
  background: #0a0a20;
  border-radius: 14px;
  box-shadow: 0 0 90px rgba(96, 130, 255, 0.28), 0 0 24px rgba(255, 120, 200, 0.12);
  touch-action: none;
}