/* Keep navigation anchored to the viewport across game and reading pages. */
:root {
  --navigation-top: max(8px, env(safe-area-inset-top));
  --navigation-left: max(12px, env(safe-area-inset-left));
  --navigation-right: max(12px, env(safe-area-inset-right));
  --navigation-bottom: calc(var(--navigation-top) + 44px + 12px);
}

.screen-back, .screen-clock {
  position: fixed;
  z-index: 10;
  top: var(--navigation-top);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  margin: 0;
  padding: 0 12px;
  border: 1px solid #ffffff60;
  border-radius: 6px;
  background: #1a3044f5;
  color: white;
  font: 650 14px/1.4 system-ui, sans-serif;
  letter-spacing: normal;
  text-decoration: none;
  box-shadow: none;
}

.screen-back {
  right: var(--navigation-right);
  width: 80px;
  gap: 5px;
  cursor: pointer;
}
.screen-back span { font-size: 22px; line-height: 1; }
.screen-back[hidden] { display: none; }
.screen-back:active { transform: none; }
.screen-back:focus-visible { outline: 3px solid #edce91; outline-offset: 1px; }

.screen-clock {
  left: var(--navigation-left);
  max-width: calc(100% - var(--navigation-left) - var(--navigation-right) - 92px);
  border-left: 3px solid #edce91;
  font-variant-numeric: tabular-nums;
}