/* =============================================
   GALLERY PAGE - Pinterest-style masonry
============================================= */
.gp-hero {
  padding: clamp(96px, 12vw, 160px) clamp(24px, 6vw, 96px) clamp(40px, 5vw, 64px);
  background: #F8F9FD;
  text-align: center;
}

.gp-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(40px, 6vw, 80px);
  font-weight: 700;
  color: var(--text-dark);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 14px 0 18px;
}

.gp-hero .section-sub {
  max-width: 520px;
  margin: 0 auto;
}

/* ── Masonry grid ── */
.gp-section {
  padding: clamp(32px, 4vw, 56px) clamp(16px, 4vw, 48px) clamp(64px, 8vw, 112px);
  background: var(--bg-white);
}

.gp-masonry {
  columns: 4;
  column-gap: 12px;
}

.gp-item {
  break-inside: avoid;
  margin-bottom: 12px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: linear-gradient(135deg, var(--blue-pale) 0%, var(--blue-soft) 100%);
  cursor: pointer;
  position: relative;
  min-height: 140px; /* holds space while image loads */
}

/* Shimmer sweep — visible until .loaded is added */
.gp-item::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.45) 50%,
    transparent 100%
  );
  background-size: 200% 100%;
  animation: gpShimmer 1.4s ease-in-out infinite;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.gp-item.loaded::after {
  opacity: 0;
}

@keyframes gpShimmer {
  0%   { background-position:  200% 0; }
  100% { background-position: -200% 0; }
}

/* Images fade in individually when loaded */
.gp-item img {
  width: 100%;
  height: auto;
  display: block;
  opacity: 0;
  transition: opacity 0.45s ease, transform 0.55s var(--ease);
}

.gp-item.loaded img {
  opacity: 1;
}

.gp-item:hover img {
  transform: scale(1.04);
}

/* ── Lightbox ── */
.gp-lightbox {
  position: fixed;
  inset: 0;
  z-index: 300;
  background: rgba(10, 12, 20, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

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

.gp-lightbox-img {
  max-width: 92vw;
  max-height: 90vh;
  border-radius: var(--radius-sm);
  object-fit: contain;
  display: block;
  transform: scale(0.96);
  transition: transform 0.3s ease;
}

.gp-lightbox.open .gp-lightbox-img {
  transform: scale(1);
}

.gp-lightbox-close {
  position: fixed;
  top: 20px;
  right: 24px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: white;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.2s ease;
}

.gp-lightbox-close:hover {
  background: rgba(255, 255, 255, 0.22);
}

.gp-lightbox-prev,
.gp-lightbox-next {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: white;
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.2s ease;
}

.gp-lightbox-prev { left: 16px; }
.gp-lightbox-next { right: 16px; }

.gp-lightbox-prev:hover,
.gp-lightbox-next:hover {
  background: rgba(255, 255, 255, 0.22);
}

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

@media (max-width: 768px) {
  .gp-masonry { columns: 2; column-gap: 8px; }
  .gp-item { margin-bottom: 8px; }
  .gp-lightbox-prev { left: 8px; }
  .gp-lightbox-next { right: 8px; }
}

@media (max-width: 480px) {
  .gp-masonry { columns: 2; }
}

/* ── Reduced motion ── */
@media (prefers-reduced-motion: reduce) {
  .gp-item img { transition: none; }
  .gp-lightbox-img { transition: none; }
}