.sv-background-video {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--sv-color-charcoal-deep);
  /* Poster must paint immediately — no opacity/visibility gate before load. */
  opacity: 1;
  visibility: visible;
}

.sv-background-video__picture,
.sv-background-video__poster,
.sv-background-video__video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.sv-background-video__picture {
  display: block;
  margin: 0;
  opacity: 1;
  visibility: visible;
}

.sv-background-video__poster {
  object-fit: cover;
  object-position: center;
  opacity: 1;
  visibility: visible;
  /* Avoid delayed paint from content-visibility heuristics. */
  content-visibility: visible;
}

.sv-background-video__video {
  object-fit: cover;
  opacity: 0;
}

.sv-background-video.is-playing .sv-background-video__video {
  opacity: 1;
}

.sv-background-video.is-playing .sv-background-video__poster,
.sv-background-video.is-playing .sv-background-video__picture {
  opacity: 0;
}

.sv-background-video__toggle {
  position: absolute;
  right: var(--sv-space-4);
  bottom: var(--sv-space-4);
  z-index: 2;
  border: 1px solid var(--sv-color-gold-on-dark);
  background: rgba(0, 0, 0, 0.45);
  color: var(--sv-color-warm-white);
  font-family: var(--sv-font-sans);
  font-size: var(--sv-fs-small);
  padding: 0.5rem 0.85rem;
  cursor: pointer;
}

/* Mobile: poster-only. No controls are rendered until desktop hydration. */
@media (max-width: 767px) {
  .sv-background-video__toggle,
  .sv-background-video__video {
    display: none !important;
  }
}

/* Reduced motion: no autoplay (JS). Explicit Play on desktop remains allowed. */