.photo-intro {
  display: grid;
  grid-template-columns: minmax(0, 1.65fr) minmax(320px, .75fr);
  align-items: end;
  gap: clamp(32px, 4vw, 52px);
  padding: clamp(42px, 8vw, 96px) 0 clamp(30px, 5vw, 56px);
}

.photo-intro h1 {
  margin: 14px 0 0;
  font-size: clamp(3.4rem, 8vw, 7.25rem);
  line-height: .82;
  color: var(--navy);
}

.photo-intro p {
  margin: 0;
  max-width: 520px;
  color: var(--muted);
  font-size: clamp(1rem, 1.5vw, 1.18rem);
}

.photo-filter-bar {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 24px 42px;
  margin-bottom: 22px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255,255,255,.72);
  box-shadow: 0 10px 30px rgba(20,43,77,.05);
}

.photo-filter-heading { min-width: 150px; }

.photo-filter-heading h2 {
  margin: 0;
  color: var(--navy);
  font-size: 1rem;
  letter-spacing: -.015em;
}

.photo-filter-heading p {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: .75rem;
}

.photo-filter-controls {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 7px;
  min-width: 0;
}

.photo-filters {
  display: flex;
  flex-wrap: nowrap;
  min-width: 0;
  padding: 4px 2px 6px;
  gap: 8px;
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  scroll-behavior: smooth;
  scrollbar-color: #b6c7dd transparent;
  scrollbar-width: thin;
}

.photo-filters::-webkit-scrollbar { height: 4px; }
.photo-filters::-webkit-scrollbar-track { background: transparent; }
.photo-filters::-webkit-scrollbar-thumb { background: #b6c7dd; border-radius: 999px; }

.filter-scroll {
  appearance: none;
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  padding: 0;
  border: 1px solid #cfdae8;
  border-radius: 50%;
  color: var(--navy);
  background: #fff;
  font-weight: 800;
  cursor: pointer;
  transition: color .2s ease, border-color .2s ease, opacity .2s ease, background .2s ease;
}

.filter-scroll[hidden] { display: none; }
.filter-scroll:disabled { opacity: .35; cursor: default; }
.filter-scroll:not(:disabled):hover { color: #fff; border-color: var(--blue); background: var(--blue); }
.filter-scroll:focus-visible { outline: 3px solid rgba(45,108,223,.25); outline-offset: 2px; }

.photo-filter-controls.has-overflow .photo-filters {
  -webkit-mask-image: linear-gradient(to right, transparent 0, #000 18px, #000 calc(100% - 18px), transparent 100%);
  mask-image: linear-gradient(to right, transparent 0, #000 18px, #000 calc(100% - 18px), transparent 100%);
}

.filter-chip {
  appearance: none;
  flex: 0 0 auto;
  padding: 8px 12px;
  border: 1px solid #cfdae8;
  border-radius: 999px;
  color: #4c5b70;
  background: #fff;
  font-size: .78rem;
  font-weight: 800;
  cursor: pointer;
  transition: color .2s ease, border-color .2s ease, background .2s ease, transform .2s ease;
}

.filter-chip:hover {
  color: var(--blue-dark);
  border-color: #9ebbe7;
  transform: translateY(-1px);
}

.filter-chip.active {
  color: #fff;
  border-color: var(--navy);
  background: var(--navy);
}

.filter-chip:focus-visible {
  outline: 3px solid rgba(45,108,223,.25);
  outline-offset: 2px;
}

.photo-collage {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  grid-auto-rows: 70px;
  grid-auto-flow: dense;
  gap: 14px;
}

.photo-tile {
  position: relative;
  grid-column: span 4;
  grid-row: span 5;
  min-width: 0;
  padding: 0;
  border: 0;
  border-radius: 18px;
  overflow: hidden;
  background: #dbe4ef;
  cursor: zoom-in;
  text-align: left;
  box-shadow: 0 12px 34px rgba(20, 43, 77, .10);
  isolation: isolate;
}

.photo-tile.photo-wide { grid-column: span 8; }
.photo-tile.photo-tall { grid-row: span 7; }
.photo-tile[hidden] { display: none; }

.photo-tile::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(180deg, transparent 48%, rgba(5, 18, 33, .78));
  opacity: .82;
  transition: opacity .3s ease;
}

.photo-tile img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  transition: transform .55s cubic-bezier(.2,.7,.2,1);
}

.photo-caption {
  position: absolute;
  left: clamp(18px, 3vw, 30px);
  right: 18px;
  bottom: clamp(17px, 3vw, 28px);
  z-index: 2;
  color: #fff;
  transform: translateY(5px);
  transition: transform .3s ease;
}

.photo-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-bottom: 7px;
}

.photo-tags span {
  display: inline-flex;
  padding: 3px 7px;
  border: 1px solid rgba(255,255,255,.32);
  border-radius: 999px;
  color: rgba(255,255,255,.88);
  background: rgba(4,14,26,.22);
  font-size: .6rem;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.photo-tile strong {
  display: block;
  font-size: clamp(1.05rem, 2vw, 1.5rem);
  line-height: 1.2;
  letter-spacing: -.025em;
}

.photo-tile:hover img { transform: scale(1.045); }
.photo-tile:hover::after { opacity: 1; }
.photo-tile:hover .photo-caption { transform: none; }
.photo-tile:focus-visible { outline: 4px solid var(--accent); outline-offset: 4px; }

.lightbox {
  width: min(1240px, calc(100vw - 36px));
  max-width: none;
  height: min(88vh, 880px);
  max-height: none;
  padding: 0;
  border: 0;
  border-radius: 22px;
  overflow: hidden;
  color: #fff;
  background: #0d1927;
  box-shadow: 0 30px 90px rgba(2, 10, 22, .52);
}

.lightbox::backdrop {
  background: rgba(3, 10, 20, .88);
  backdrop-filter: blur(8px);
}

.lightbox-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 360px);
  height: 100%;
}

.lightbox-visual {
  position: relative;
  display: grid;
  place-items: center;
  min-width: 0;
  min-height: 0;
  padding: 24px;
  background: #07111d;
}

.lightbox-visual img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.lightbox-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(28px, 4vw, 48px);
  background: linear-gradient(145deg, #18324f, #101f31);
}

.lightbox-count {
  margin-bottom: auto;
  color: rgba(255,255,255,.55);
  font-size: .75rem;
  font-weight: 800;
  letter-spacing: .1em;
}

.lightbox-category {
  margin: 0 0 10px;
  color: #9fc0ff;
  font-size: .75rem;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.lightbox-copy h2 {
  margin: 0 0 16px;
  font-size: clamp(2rem, 4vw, 3.6rem);
  line-height: .98;
  letter-spacing: -.045em;
}

.lightbox-copy > p:last-child {
  margin: 0 0 auto;
  color: rgba(255,255,255,.72);
}

.lightbox-close,
.lightbox-arrow {
  appearance: none;
  position: absolute;
  z-index: 4;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255,255,255,.18);
  color: #fff;
  background: rgba(7,17,29,.68);
  backdrop-filter: blur(8px);
  cursor: pointer;
  transition: background .2s ease, transform .2s ease;
}

.lightbox-close {
  top: 16px;
  right: 16px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  font-size: 1.7rem;
  line-height: 1;
}

.lightbox-arrow {
  top: 50%;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  font-size: 1.35rem;
}

.lightbox-prev { left: 22px; }
.lightbox-next { right: 22px; }
.lightbox-close:hover,
.lightbox-arrow:hover { background: rgba(45,108,223,.92); }
.lightbox-arrow:hover { transform: translateY(-2px); }
.lightbox-close:focus-visible,
.lightbox-arrow:focus-visible { outline: 3px solid #9fc0ff; outline-offset: 3px; }
body.lightbox-open { overflow: hidden; }

@media (max-width: 820px) {
  .photo-intro { grid-template-columns: 1fr; gap: 22px; }
  .photo-filter-bar { grid-template-columns: 1fr; gap: 14px; }
  .photo-collage { grid-template-columns: repeat(2, minmax(0, 1fr)); grid-auto-rows: 76px; }
  .photo-tile,
  .photo-tile.photo-wide { grid-column: span 1; grid-row: span 4; }
  .photo-tile.photo-tall { grid-row: span 6; }
  .lightbox { width: calc(100vw - 20px); height: calc(100dvh - 20px); border-radius: 16px; }
  .lightbox-shell { grid-template-columns: 1fr; grid-template-rows: minmax(0, 1fr) auto; }
  .lightbox-copy { padding: 22px 24px 26px; }
  .lightbox-count { margin: 0 0 14px; }
  .lightbox-copy h2 { font-size: 2rem; margin-bottom: 10px; }
  .lightbox-copy > p:last-child { margin: 0; }
}

@media (max-width: 520px) {
  .photo-collage { gap: 10px; grid-auto-rows: 64px; }
  .photo-tile,
  .photo-tile.photo-wide { grid-column: span 2; grid-row: span 4; }
  .photo-tile:nth-child(2),
  .photo-tile:nth-child(4) { grid-column: span 1; grid-row: span 5; }
  .photo-tile:nth-child(6) { grid-column: span 1; grid-row: span 5; }
  .photo-caption { left: 15px; bottom: 14px; }
  .photo-tile strong { font-size: 1rem; }
  .photo-tags span { font-size: .55rem; }
  .lightbox-visual { padding: 54px 10px 10px; }
  .lightbox-arrow { top: auto; bottom: 14px; }
  .lightbox-prev { left: 14px; }
  .lightbox-next { right: 14px; }
}

@media (prefers-reduced-motion: reduce) {
  .photo-tile img,
  .photo-caption,
  .filter-chip,
  .filter-scroll,
  .lightbox-close,
  .lightbox-arrow { transition: none; }
}