/* ============================================
   Photography Gallery — Asymmetric Exhibition
   ============================================ */

/* --- Header --- */
.photo-header {
  padding: 10rem var(--gutter) 4rem;
  text-align: center;
}

.photo-header-inner {
  max-width: 600px;
  margin: 0 auto;
}

.photo-title {
  font-family: var(--font-serif);
  font-size: var(--text-hero);
  font-weight: 500;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-md);
}

.photo-subtitle {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  line-height: 1.8;
}

/* --- Asymmetric Grid --- */
.photo-gallery {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--gutter) var(--space-3xl);
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-auto-rows: minmax(180px, auto);
  gap: var(--space-md);
}

/* --- Photo Items --- */
.photo-item {
  position: relative;
  border-radius: 1rem;
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.5s var(--ease-spring),
              box-shadow 0.5s var(--ease-out-quart);
}

.photo-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 24px 60px rgba(26, 22, 18, 0.12);
  z-index: 2;
}

.photo-item-inner {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.photo-item-inner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s var(--ease-out-expo);
}

.photo-item:hover .photo-item-inner img {
  transform: scale(1.06);
}

/* --- Asymmetric Layout Positions --- */
.photo-item:nth-child(1) {
  grid-column: 1 / 6;
  grid-row: span 2;
}

.photo-item:nth-child(2) {
  grid-column: 6 / 9;
  grid-row: span 1;
}

.photo-item:nth-child(3) {
  grid-column: 9 / 13;
  grid-row: span 1;
}

.photo-item:nth-child(4) {
  grid-column: 6 / 9;
  grid-row: span 2;
}

.photo-item:nth-child(5) {
  grid-column: 9 / 13;
  grid-row: span 2;
}

.photo-item:nth-child(6) {
  grid-column: 1 / 7;
  grid-row: span 1;
}

.photo-item:nth-child(7) {
  grid-column: 7 / 13;
  grid-row: span 1;
}

/* --- Tall & Wide Modifiers --- */
.photo-item--tall {
  min-height: 480px;
}

.photo-item--wide {
  min-height: 300px;
}

/* --- Overlay --- */
.photo-item-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(26, 22, 18, 0.6) 0%,
    rgba(26, 22, 18, 0) 40%
  );
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
  padding: var(--space-md);
  opacity: 0;
  transition: opacity 0.4s var(--ease-out-quart);
}

.photo-item:hover .photo-item-overlay {
  opacity: 1;
}

.photo-item-num {
  font-family: var(--font-serif);
  font-size: var(--text-3xl);
  font-weight: 600;
  color: rgba(255, 255, 255, 0.5);
  line-height: 1;
}

/* --- Lightbox --- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(10, 8, 6, 0.96);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s var(--ease-out-expo),
              visibility 0.4s;
}

.lightbox.active {
  opacity: 1;
  visibility: visible;
}

.lightbox-close {
  position: absolute;
  top: 2rem;
  right: 2rem;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.04);
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.4s var(--ease-spring),
              background 0.3s ease,
              border-color 0.3s ease;
}

.lightbox-close:hover {
  transform: scale(1.1) rotate(90deg);
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.25);
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.02);
  color: rgba(255, 255, 255, 0.6);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.4s var(--ease-spring),
              background 0.3s ease,
              color 0.3s ease,
              border-color 0.3s ease;
}

.lightbox-nav:hover {
  transform: translateY(-50%) scale(1.1);
  background: rgba(255, 255, 255, 0.06);
  color: white;
  border-color: rgba(255, 255, 255, 0.2);
}

.lightbox-prev {
  left: 2rem;
}

.lightbox-next {
  right: 2rem;
}

.lightbox-content {
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  transform: scale(0.95);
  transition: transform 0.5s var(--ease-out-expo);
}

.lightbox.active .lightbox-content {
  transform: scale(1);
}

.lightbox-img {
  max-width: 100%;
  max-height: 80vh;
  border-radius: 0.5rem;
  object-fit: contain;
  box-shadow: 0 40px 100px rgba(0, 0, 0, 0.5);
}

.lightbox-counter {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.5);
  letter-spacing: 0.1em;
}

/* --- Back Button --- */
.back-btn {
  position: fixed;
  top: 2rem;
  left: 2rem;
  z-index: 45;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 0.55rem 1.1rem;
  border-radius: 100px;
  border: 1px solid var(--border-medium);
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: color 0.3s ease,
              border-color 0.3s ease,
              transform 0.3s var(--ease-spring);
}

.back-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: scale(1.04);
}

/* --- Responsive: Tablet --- */
@media (max-width: 1024px) {
  .photo-gallery {
    grid-template-columns: repeat(8, 1fr);
    gap: var(--space-sm);
  }

  .photo-item:nth-child(1) {
    grid-column: 1 / 5;
    grid-row: span 2;
  }

  .photo-item:nth-child(2) {
    grid-column: 5 / 9;
    grid-row: span 1;
  }

  .photo-item:nth-child(3) {
    grid-column: 5 / 9;
    grid-row: span 1;
  }

  .photo-item:nth-child(4) {
    grid-column: 1 / 5;
    grid-row: span 2;
  }

  .photo-item:nth-child(5) {
    grid-column: 5 / 9;
    grid-row: span 2;
  }

  .photo-item:nth-child(6) {
    grid-column: 1 / 5;
    grid-row: span 1;
  }

  .photo-item:nth-child(7) {
    grid-column: 5 / 9;
    grid-row: span 1;
  }

  .photo-item--tall {
    min-height: 360px;
  }
}

/* --- Responsive: Mobile --- */
@media (max-width: 768px) {
  .photo-header {
    padding-top: 8rem;
  }

  .photo-gallery {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-sm);
  }

  .photo-item:nth-child(n) {
    grid-column: span 1;
    grid-row: span 1;
  }

  .photo-item:nth-child(1) {
    grid-column: 1 / -1;
    grid-row: span 1;
  }

  .photo-item--tall,
  .photo-item--wide {
    min-height: 240px;
  }

  .photo-item:nth-child(1) {
    min-height: 300px;
  }

  .lightbox-nav {
    width: 42px;
    height: 42px;
  }

  .lightbox-prev {
    left: 1rem;
  }

  .lightbox-next {
    right: 1rem;
  }

  .lightbox-close {
    top: 1rem;
    right: 1rem;
    width: 42px;
    height: 42px;
  }

  .back-btn {
    top: 1rem;
    left: 1rem;
    padding: 0.4rem 0.9rem;
    font-size: var(--text-xs);
  }
}

@media (max-width: 480px) {
  .photo-gallery {
    grid-template-columns: 1fr;
  }

  .photo-item:nth-child(1) {
    grid-column: 1;
  }

  .photo-item--tall,
  .photo-item--wide {
    min-height: 280px;
  }
}