* { box-sizing: border-box; margin: 0; padding: 0; }
html, body {
  background: #0A0A1F;
  overflow: hidden;
  width: 100%;
  height: 100%;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  font-family: 'Segoe UI', 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', sans-serif;
}
#game {
  width: 100vw;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}
canvas { touch-action: none; }