/* ═══════════════════════════════════════════════════════════
   📸  PHOTO BACKGROUND SLIDESHOW — Universal / Shared
   Ken Burns fullscreen reel + per-section scroll trigger
   Works with ALL invitation templates.
═══════════════════════════════════════════════════════════ */

/* Full-screen reel — sits at z-index 0 behind everything */
#photo-bg-reel {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

/* Individual photo slide */
.pbr-slide {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0;
  transition: opacity 2s cubic-bezier(.4,0,.2,1);
  will-change: opacity, transform;
}
.pbr-slide.active { opacity: 1; }
.pbr-slide.prev   { opacity: 0; transition: opacity 2s ease; }

/* Ken Burns – 4 directional variations */
@keyframes kenBurnsA {
  from { transform: scale(1.11) translate( 1.5%,  1.5%); }
  to   { transform: scale(1.0)  translate(-0.5%, -0.5%); }
}
@keyframes kenBurnsB {
  from { transform: scale(1.13) translate(-1.5%,  0.5%); }
  to   { transform: scale(1.0)  translate( 0.5%, -0.5%); }
}
@keyframes kenBurnsC {
  from { transform: scale(1.09) translate( 0.5%,  1.8%); }
  to   { transform: scale(1.0)  translate(-0.5%, -0.5%); }
}
@keyframes kenBurnsD {
  from { transform: scale(1.12) translate(-1.0%, -1.5%); }
  to   { transform: scale(1.0)  translate( 1.0%,  0.5%); }
}

/* Neutral light overlay — soft white veil over the photos */
#photo-bg-reel::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,252,248,.68);
  z-index: 1;
  pointer-events: none;
}

/* Generic section transparency when reel is active */
body.has-photo-bg section {
  background: rgba(255,255,255,.55) !important;
}

/* Progress dots — right edge of screen */
#pbr-dots {
  position: fixed;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 5;
  display: flex;
  flex-direction: column;
  gap: 7px;
  pointer-events: none;
}
#pbr-dots span {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: rgba(120,90,60,.25);
  transition: background .4s, transform .4s;
}
#pbr-dots span.on {
  background: rgba(120,90,60,.85);
  transform: scale(1.5);
  box-shadow: 0 0 6px rgba(120,90,60,.4);
}

/* ── Cover: cinematic blurred photo background ── */
#cover-photo-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0;
  transition: opacity 2.8s ease;
  filter: blur(20px) brightness(.52) saturate(1.4);
  transform: scale(1.1);
  z-index: 1;
  pointer-events: none;
}
#cover-photo-bg.loaded { opacity: 1; }

/* ── Dark template overrides (dark-romance, dark-mode themes) ── */
body.has-photo-bg.dark-template section,
body.has-photo-bg.dark-mode section {
  background: rgba(15,10,20,.78) !important;
}
body.has-photo-bg.dark-template #photo-bg-reel::after,
body.has-photo-bg.dark-mode #photo-bg-reel::after {
  background: rgba(10,8,18,.82);
}
body.dark-template #cover-photo-bg,
body.dark-mode #cover-photo-bg {
  filter: blur(22px) brightness(.34) saturate(1.1);
}