@font-face {
  font-family: 'Orbitron';
  src: url('fonts/orbitron.woff2') format('woff2');
  font-weight: 400 900;
  font-display: swap;
}
html, body {
  margin: 0; height: 100%; overflow: hidden; background: #07070b;
  touch-action: none; overscroll-behavior: none;
  -webkit-user-select: none; user-select: none; -webkit-touch-callout: none; -webkit-tap-highlight-color: transparent;
}
#game { position: fixed; inset: 0; width: 100%; height: 100%; display: block; }
#mute {
  position: fixed; z-index: 2;
  top: calc(12px + env(safe-area-inset-top)); right: calc(12px + env(safe-area-inset-right));
  width: 44px; height: 44px; border-radius: 50%; padding: 0;
  border: 1px solid rgba(255,255,255,.18); background: rgba(10,10,14,.55);
  color: #fff; cursor: pointer; display: grid; place-items: center;
}
#mute svg { width: 20px; height: 20px; }