.stale-board-warning {
  position: fixed;
  z-index: 50;
  left: 50%;
  bottom: 4.5vh;
  width: min(760px, calc(100vw - 40px));
  transform: translateX(-50%);
  padding: clamp(12px, 1.2vw, 22px);
  border: 3px solid #ff5964;
  background: #5b1018f2;
  box-shadow: 0 12px 50px #000c, inset 6px 0 #ff8b92;
  color: #fff;
  text-align: center;
}

.stale-board-warning strong {
  display: block;
  font-size: clamp(18px, 2vw, 38px);
  letter-spacing: .08em;
}

.stale-board-warning span {
  display: block;
  margin-top: 5px;
  font-size: clamp(10px, .9vw, 18px);
}