html, body {
  margin: 0;
  height: 100%;
  background: #000;
  color: #eee;
  font-family: system-ui, sans-serif;
}

#app {
  position: fixed;
  inset: 0;
  overflow: hidden;
}

#hud {
  position: fixed;
  left: 12px;
  bottom: 12px;
  padding: 6px 8px;
  background: rgba(0, 0, 0, 0.45);
  border-radius: 6px;
  font-size: 12px;
}

#err {
  position: fixed;
  top: 12px;
  right: 12px;
  max-width: 42ch;
  background: #611;
  color: #fff;
  padding: 8px 10px;
  border-radius: 6px;
  display: none;
}