.opening-intro {
  position: fixed;
  inset: 0;
  width: 100%;
  max-width: none;
  height: 100%;
  height: 100dvh;
  max-height: none;
  margin: 0;
  padding: 0;
  border: 0;
  background: #090a09;
  color: #ead39a;
  overflow: hidden;
  opacity: 1;
  transition: opacity 600ms ease;
}
.opening-intro::backdrop { background: transparent; }
.opening-intro.is-leaving { opacity: 0; pointer-events: none; }
.opening-intro video { display: block; width: 100%; height: 100%; object-fit: contain; }
.opening-intro button {
  position: absolute;
  right: max(24px, env(safe-area-inset-right));
  bottom: max(24px, env(safe-area-inset-bottom));
  min-height: 44px;
  padding: 10px 18px;
  border: 1px solid #ad915b;
  border-radius: 2px;
  background: #090a09e6;
  color: #ead39a;
  font: inherit;
  font-size: 13px;
  letter-spacing: .08em;
  cursor: pointer;
}
.opening-intro button:hover { background: #0f201d; }
.opening-intro button:focus-visible { outline: 2px solid #ead39a; outline-offset: 5px; }
@media (prefers-reduced-motion: reduce) {
  .opening-intro { transition: none; }
}