td {
  text-align: center;
}

nav {
  position: relative;
  background-color: white;
}

nav::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 120px;
  height: 120px;
  background-color: #bc002d;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  z-index: 0;
}

nav .nav-inner {
  position: relative;
  z-index: 1;
}

#command-hint {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 80px;
  font-weight: bold;
  color: white;
  background: rgba(0,0,0,0.7);
  padding: 20px 40px;
  border-radius: 20px;
  display: none;
  pointer-events: none;
  z-index: 9999;
  opacity: 0;
  transition: opacity 0.3s ease;
  white-space: pre;
}