/* ═══════════════════════════════════════════════════════════════
   viewer.css — Photo tape / lightbox, video player
   TikTok/Instagram-style snap scroll with margin/fullscreen modes
   ═══════════════════════════════════════════════════════════════ */

photo-viewer {
  display: block;
}

/* ── Viewer overlay ────────────────────────────────────────────── */
.viewer {
  position: fixed;
  inset: 0;
  z-index: var(--z-viewer);
  background: var(--color-bg);
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-mid) var(--ease);
}

.viewer.open {
  opacity: 1;
  pointer-events: all;
}

/* ── Close button ──────────────────────────────────────────────── */
.viewer__close {
  position: absolute;
  top: var(--gap-md);
  left: var(--gap-md);
  z-index: 10;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  background: var(--color-overlay);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: var(--color-text);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: background var(--dur-fast);
}

.viewer__close:hover { background: var(--color-bg-secondary); }

/* ── Sound toggle (video only) ─────────────────────────────────── */
.viewer__sound {
  position: absolute;
  top: var(--gap-md);
  right: var(--gap-md);
  z-index: 10;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  background: rgba(0,0,0,0.45);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: #fff;
  transition: background var(--dur-fast);
}

.viewer__sound.visible { display: flex; }
.viewer__sound:hover { background: rgba(0,0,0,0.7); }

/* ── Tape (snap scroll container) ─────────────────────────────── */
.viewer__tape {
  width: 100%;
  height: 100%;
  overflow-y: scroll;
  overflow-x: hidden;
  scroll-snap-type: y mandatory;
  scrollbar-width: none;
  -ms-overflow-style: none;
  -webkit-overflow-scrolling: touch;
}

.viewer__tape::-webkit-scrollbar { display: none; }

/* ── Single slide ──────────────────────────────────────────────── */
.viewer__slide {
  width: 100%;
  height: 100dvh;
  scroll-snap-align: start;
  scroll-snap-stop: always;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  /* bg-color set inline per photo */
}

/* Margin mode: photo with padding */
.viewer__slide--margins {
  padding: var(--gallery-margin, 5%);
}

/* Fullscreen mode: photo fills slide */
.viewer__slide--fullscreen {
  padding: 0;
}

/* ── Slide background blur (for video) ─────────────────────────── */
.viewer__slide-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.viewer__slide-bg video,
.viewer__slide-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: blur(40px);
  opacity: 0.2;
  transform: scale(1.1); /* hide blur edges */
}

/* ── Main media element ────────────────────────────────────────── */
.viewer__media-wrap {
  position: relative;
  z-index: 1;
  max-width: 100%;
  max-height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.viewer__slide--fullscreen .viewer__media-wrap {
  width: 100%;
  height: 100%;
}

.viewer__img {
  max-width: 100%;
  max-height: 100dvh;
  object-fit: contain;
  display: block;
}

.viewer__slide--fullscreen .viewer__img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.viewer__video {
  max-width: 100%;
  max-height: 100dvh;
  object-fit: contain;
  display: block;
  cursor: pointer;
}

.viewer__slide--fullscreen .viewer__video {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

/* ── Video progress bar ────────────────────────────────────────── */
.viewer__progress {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: rgba(255,255,255,0.2);
  z-index: 5;
  display: none;
}

.viewer__slide--video .viewer__progress {
  display: block;
}

.viewer__progress-bar {
  height: 100%;
  background: #e8304c;
  width: 0%;
  transition: width 0.25s linear;
}

/* ── Caption overlay ───────────────────────────────────────────── */
.viewer__caption {
  position: absolute;
  bottom: 1.5rem;
  left: 1.5rem;
  right: 1.5rem;
  z-index: 5;
  pointer-events: none;
  opacity: 0;
  transform: translateY(0.5rem);
  transition: opacity var(--dur-mid), transform var(--dur-mid);
}

.viewer__slide:hover .viewer__caption,
.viewer__slide.caption-show .viewer__caption {
  opacity: 1;
  transform: translateY(0);
}

.viewer__caption-inner {
  display: inline-block;
  background: var(--color-overlay);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 0.6rem 1rem;
  max-width: 60ch;
}

.viewer__caption-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.1rem;
}

.viewer__caption-desc {
  font-family: var(--font-body);
  font-size: 0.82rem;
  color: var(--color-text-secondary);
}

.viewer__caption-date {
  font-family: var(--font-ui);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-top: 0.2rem;
}

/* ── Hashtags on slide ─────────────────────────────────────────── */
.viewer__hashtags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  margin-top: 0.4rem;
}

.viewer__hashtag {
  font-family: var(--font-ui);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  background: var(--color-accent-light);
  padding: 0.1rem 0.4rem;
}

/* ── Context menu (right click / long press) ───────────────────── */
/* Defined in catalog.css as .context-menu */

/* ── Mobile adaptations ────────────────────────────────────────── */
@media (max-width: 768px) {
  /* No video background on mobile (battery saving) */
  .viewer__slide-bg {
    display: none;
  }

  .viewer__caption {
    opacity: 1;
    transform: none;
    bottom: 1rem;
    left: 1rem;
    right: 1rem;
  }
}