/* =============================================
   RB Captures — Gallery & BTS Styles (gallery.css)
   Masonry Layout, Lightbox, Filters
   ============================================= */

/* --- Page Hero Banner --- */
.page-hero {
  position: relative;
  width: 100%;
  height: 45vh;
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg);
  overflow: hidden;
}

.page-hero__bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(200, 169, 81, 0.05) 0%,
    rgba(10, 10, 10, 1) 50%,
    rgba(200, 169, 81, 0.03) 100%
  );
}

.page-hero__content {
  position: relative;
  z-index: 2;
  text-align: center;
}

.page-hero__label {
  font-family: var(--font-body);
  font-size: var(--fs-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.4em;
  color: var(--color-gold);
  margin-bottom: var(--space-lg);
  animation: textReveal 0.8s ease forwards;
  animation-delay: 0.2s;
  opacity: 0;
}

.page-hero__title {
  font-size: var(--fs-4xl);
  color: var(--color-white);
  animation: textReveal 0.8s ease forwards;
  animation-delay: 0.4s;
  opacity: 0;
}

.page-hero__line {
  width: 60px;
  height: 1px;
  background: var(--color-gold);
  margin: var(--space-xl) auto 0;
  animation: lineExpand 1s ease forwards;
  animation-delay: 0.6s;
  width: 0;
}

/* --- Filter Buttons --- */
.gallery-filters {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-sm);
  padding: var(--space-3xl) 0 var(--space-xl);
}

.gallery-filter {
  padding: var(--space-sm) var(--space-lg);
  font-size: var(--fs-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-text-muted);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-base);
}

.gallery-filter:hover {
  color: var(--color-gold);
  border-color: var(--color-border-hover);
}

.gallery-filter.is-active {
  color: var(--color-bg);
  background: var(--color-gold);
  border-color: var(--color-gold);
}

/* --- Masonry Gallery --- */
.masonry-gallery {
  columns: 4;
  column-gap: var(--space-md);
  padding: var(--space-xl) 0 var(--space-section);
}

.masonry-item {
  break-inside: avoid;
  margin-bottom: var(--space-md);
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  cursor: pointer;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.masonry-item.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.masonry-item.is-hidden {
  display: none;
}

.masonry-item img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.6s ease;
  filter: grayscale(10%);
}

.masonry-item:hover img {
  transform: scale(1.06);
  filter: grayscale(0%);
}

/* Gold Overlay on Hover */
.masonry-item::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(200, 169, 81, 0.3) 0%,
    transparent 50%
  );
  opacity: 0;
  transition: opacity var(--transition-base);
  pointer-events: none;
}

.masonry-item:hover::after {
  opacity: 1;
}

/* Caption Overlay */
.masonry-item__caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-lg) var(--space-md);
  background: linear-gradient(to top, rgba(10, 10, 10, 0.85), transparent);
  transform: translateY(100%);
  transition: transform var(--transition-base);
  z-index: 2;
}

.masonry-item:hover .masonry-item__caption {
  transform: translateY(0);
}

.masonry-item__title {
  font-family: var(--font-heading);
  font-size: var(--fs-sm);
  color: var(--color-white);
  letter-spacing: 0.05em;
}

.masonry-item__category {
  font-size: var(--fs-xs);
  color: var(--color-gold);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-top: 2px;
}

/* --- BTS Grid (Uniform) --- */
.bts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-md);
  padding: var(--space-xl) 0 var(--space-section);
}

.bts-item {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
  border-radius: var(--radius-md);
  cursor: pointer;
}

.bts-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.bts-item:hover img {
  transform: scale(1.08);
}

.bts-item__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10, 10, 10, 0.9) 0%, transparent 60%);
  display: flex;
  align-items: flex-end;
  padding: var(--space-lg);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.bts-item:hover .bts-item__overlay {
  opacity: 1;
}

.bts-item__text {
  color: var(--color-white);
  font-size: var(--fs-sm);
  font-weight: 500;
}

.bts-item__sub {
  color: var(--color-gold);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: 4px;
}

/* --- Lightbox --- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  background: rgba(10, 10, 10, 0.97);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.lightbox.is-open {
  opacity: 1;
  visibility: visible;
}

.lightbox__image {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  border-radius: var(--radius-md);
  animation: scaleIn 0.4s ease;
}

.lightbox__close {
  position: absolute;
  top: var(--space-xl);
  right: var(--space-xl);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-size: 24px;
  cursor: pointer;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  transition: all var(--transition-base);
  background: none;
}

.lightbox__close:hover {
  border-color: var(--color-gold);
  color: var(--color-gold);
}

.lightbox__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  cursor: pointer;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  transition: all var(--transition-base);
  background: rgba(10, 10, 10, 0.5);
}

.lightbox__nav:hover {
  border-color: var(--color-gold);
  color: var(--color-gold);
}

.lightbox__nav--prev {
  left: var(--space-xl);
}

.lightbox__nav--next {
  right: var(--space-xl);
}

.lightbox__counter {
  position: absolute;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.15em;
}

.lightbox__caption {
  position: absolute;
  bottom: var(--space-3xl);
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  max-width: 600px;
}

.lightbox__caption-title {
  font-family: var(--font-heading);
  font-size: var(--fs-lg);
  color: var(--color-white);
}

/* --- Video Play Overlay --- */
.masonry-item__play {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 56px;
  height: 56px;
  background: rgba(200, 169, 81, 0.85);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: #0a0a0a;
  z-index: 3;
  transition: all var(--transition-base);
  box-shadow: 0 4px 20px rgba(200, 169, 81, 0.3);
  pointer-events: none;
}

.masonry-item:hover .masonry-item__play,
.bts-item:hover .masonry-item__play {
  transform: translate(-50%, -50%) scale(1.15);
  background: rgba(200, 169, 81, 1);
}

.masonry-item__badge {
  display: inline-block;
  font-size: 0.6rem;
  background: rgba(200, 169, 81, 0.2);
  color: var(--color-gold);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  letter-spacing: 0.05em;
}

/* --- Masonry item video --- */
.masonry-item video {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.6s ease;
  filter: grayscale(10%);
}

.masonry-item:hover video {
  transform: scale(1.06);
  filter: grayscale(0%);
}

/* --- Lightbox Video --- */
.lightbox__media-container {
  display: flex;
  align-items: center;
  justify-content: center;
  max-width: 90vw;
  max-height: 85vh;
}

.lightbox__video {
  max-width: 90vw;
  max-height: 80vh;
  border-radius: var(--radius-md);
  background: #000;
  outline: none;
}

/* --- Empty State --- */
.gallery-empty {
  text-align: center;
  padding: var(--space-4xl) var(--space-xl);
  color: var(--color-text-muted);
}

.gallery-empty__icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-xl);
  color: var(--color-border);
}

.gallery-empty__text {
  font-size: var(--fs-md);
  margin-bottom: var(--space-md);
}

.gallery-empty__sub {
  font-size: var(--fs-sm);
}

/* --- Loading Placeholder --- */
.gallery-skeleton {
  columns: 4;
  column-gap: var(--space-md);
  padding: var(--space-xl) 0;
}

.gallery-skeleton__item {
  break-inside: avoid;
  margin-bottom: var(--space-md);
  border-radius: var(--radius-md);
  background: var(--color-bg-elevated);
  animation: shimmer 1.5s infinite;
  background-size: 200% 100%;
}

/* --- Responsive --- */
@media (max-width: 1200px) {
  .masonry-gallery { columns: 3; }
  .gallery-skeleton { columns: 3; }
}

@media (max-width: 768px) {
  .masonry-gallery { columns: 2; }
  .gallery-skeleton { columns: 2; }
  
  .page-hero { height: 35vh; min-height: 260px; }
  
  .lightbox__nav { width: 40px; height: 40px; }
  .lightbox__nav--prev { left: var(--space-md); }
  .lightbox__nav--next { right: var(--space-md); }
  
  .bts-grid { grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); }
}

@media (max-width: 480px) {
  .masonry-gallery { columns: 1; }
  .gallery-skeleton { columns: 1; }
  
  .gallery-filters { gap: var(--space-xs); }
  .gallery-filter { padding: 6px var(--space-md); font-size: 0.6rem; }
  
  .bts-grid { grid-template-columns: 1fr; }
}