orientation-lock.css

/*
 * Orientation lock overlay.
 * Shows a full-screen overlay prompting the user to rotate to landscape.
 * Only applies to screens ≤1024px in portrait orientation.
 * support.html no longer uses this overlay.
 *
 * SIZING: the overlay always lives in a ~1440px-wide coordinate space —
 * on mobile because <meta viewport width=1440> makes the layout viewport
 * 1440px (the browser then scales the whole page down to the device width),
 * on desktop because fluid-scaling.js sets the overlay to innerWidth/zoom,
 * and zoom is innerWidth/1440. So sizes here are chosen as a fraction of
 * 1440 and land at the same apparent size on any device. Anything sized in
 * "normal" px (the old 18px text, 72px icon) renders at roughly a quarter
 * of that on a phone, which is why the prompt read as fine print.
 */

#orientation-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  /* width/height are overridden by fluid-scaling.js to compensate for body zoom */
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.88);
  z-index: 999999;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  gap: 0.75em;
  color: white;
  font-family: 'Ubuntu', sans-serif;
  font-weight: 400;
  font-size: 72px; /* 5% of the 1440px space ≈ 20px on a 390px-wide phone */
  text-align: center;
  padding: 0.8em;
  box-sizing: border-box;
}

#orientation-overlay svg {
  width: 4.6em;
  height: 4.6em;
  fill: white;
  display: block;
  flex-shrink: 0;
}

#orientation-overlay p {
  margin: 0;
  max-width: 12em;
  line-height: 1.4;
  letter-spacing: 0.01em;
}

/* Overlay show/hide is handled by fluid-scaling.js via window.innerWidth/innerHeight,
 * because viewport width=1440 makes CSS max-width media queries check the layout
 * viewport (always 1440px) rather than the actual device width. */