.boot-status, .no-script {
  position: fixed;
  inset: 40% auto auto 50%;
  transform: translateX(-50%);
  z-index: 100;
  max-width: 36rem;
  padding: 1.5rem;
  background: #111;
  color: #eee;
  border: 1px solid #555;
  font: 14px/1.7 monospace;
}
.boot-status button { padding: .5rem 1rem; cursor: pointer; }