.subpage {
  position: absolute;
  inset: 0;
  z-index: 6;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  overflow: hidden;
  background: #000;
  color-scheme: dark;
  --bg: #000;
  --white: #f4f4f4;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--white);
  user-select: none;
  isolation: isolate;
}
.subpage * { box-sizing: border-box; }

@media (prefers-reduced-motion: reduce) {
  .subpage, .subpage * {
    animation: none !important;
    transition: none !important;
  }
}