/* ─────────────────────────────────────────
   cartography.css
───────────────────────────────────────── */

/* ── PAGE HERO ── */
.page-hero {
  background: var(--pale);
  border-bottom: 1px solid var(--border);
  padding: 3rem 0 2.5rem;
}
.page-hero h1 {
  font-size: clamp(1.6rem, 3vw, 2rem);
  margin-bottom: 0.75rem;
}
.page-hero-sub {
  font-size: 0.92rem;
  color: var(--muted);
  line-height: 1.75;
  max-width: 620px;
  margin: 0;
}
.page-hero-sub a {
  color: var(--mid);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ── FILTER BAR ── */
.filter-bar {
  border-bottom: 1px solid var(--border);
  padding: 0.85rem 0;
  background: var(--white);
  position: sticky;
  top: 60px;
  z-index: 10;
}
.filter-inner {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.filter-label {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-right: 0.25rem;
  flex-shrink: 0;
}
.filter-btns {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}
.filter-btn {
  font-family: var(--font);
  font-size: 0.78rem;
  font-weight: 500;
  padding: 4px 14px;
  border-radius: 20px;
  border: 1px solid var(--border-mid);
  color: var(--muted);
  background: var(--white);
  cursor: pointer;
  transition: all var(--transition);
}
.filter-btn:hover {
  border-color: var(--mid);
  color: var(--mid);
}
.filter-btn.active {
  background: var(--navy);
  color: var(--white);
  border-color: var(--navy);
}

/* ── GALLERY ── */
.gallery-section {
  padding: 2rem 0 4rem;
}
.gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.85rem;
}

.img-card {
  position: relative;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  background: var(--pale);
  border: 1px solid var(--border-mid);
}
.img-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.35s ease;
}
.img-card:hover img {
  transform: scale(1.05);
}
.img-overlay {
  position: absolute;
  inset: 0;
  background: rgba(3, 61, 79, 0);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 0.75rem;
  transition: background 0.25s ease;
}
.img-card:hover .img-overlay {
  background: rgba(3, 61, 79, 0.6);
}
.img-tag {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(156, 215, 233, 0.9);
  margin: 0 0 0.2rem;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}
.img-caption {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--white);
  margin: 0;
  line-height: 1.3;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.2s ease 0.03s, transform 0.2s ease 0.03s;
}
.img-card:hover .img-tag,
.img-card:hover .img-caption {
  opacity: 1;
  transform: translateY(0);
}

/* hidden by filter */
.img-card.hidden {
  display: none;
}

/* ── LIGHTBOX ── */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(3, 20, 28, 0.93);
  z-index: 500;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}
.lightbox.open {
  display: flex;
}
.lightbox-inner {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  max-width: min(900px, 90vw);
  width: 100%;
}
.lb-close {
  position: absolute;
  top: -2.5rem;
  right: 0;
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.7);
  font-size: 1.3rem;
  cursor: pointer;
  padding: 4px 8px;
  transition: color var(--transition);
}
.lb-close:hover { color: var(--white); }

#lb-img {
  max-width: 100%;
  max-height: 72vh;
  border-radius: var(--radius);
  display: block;
  object-fit: contain;
}
.lb-caption {
  margin-top: 0.85rem;
  text-align: center;
}
.lb-caption p {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--white);
  margin: 0 0 0.15rem;
}
.lb-caption span {
  font-size: 0.75rem;
  color: rgba(156, 215, 233, 0.75);
}
.lb-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 1rem;
}
.lb-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font);
  font-size: 0.8rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.8);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius);
  padding: 6px 16px;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}
.lb-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  color: var(--white);
}
.lb-counter {
  font-size: 0.78rem;
  color: rgba(156, 215, 233, 0.6);
  min-width: 50px;
  text-align: center;
}

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  .gallery { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .gallery { grid-template-columns: repeat(2, 1fr); gap: 0.5rem; }
  .filter-bar { top: 0; }
  #lb-img { max-height: 55vh; }
}