/* ─────────────────────────────────────────────────────────
   NGI GROUPE — project detail pages (/projets/*.html)
   Page header banner, alternating project blocks, image
   gallery grid, and the shared lightbox viewer.
   ───────────────────────────────────────────────────────── */

body { background: var(--white); }

/* ─── PAGE HEADER ──────────────────────────────────── */
.page-header {
  position: relative;
  min-height: 62vh;
  min-height: 62dvh;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  padding-top: 6rem;
}
.page-header-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgba(20,30,38,0.82) 0%, rgba(20,30,38,0.5) 55%, rgba(20,30,38,0.25) 100%), var(--bg-img) center/cover no-repeat;
  transform: scale(1.04);
  transition: transform 6s var(--ease);
}
.page-header.loaded .page-header-bg { transform: scale(1); }
.page-header-content { position: relative; z-index: 2; padding-bottom: 4rem; }
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.55);
  margin-bottom: 1.75rem;
}
.breadcrumb a { color: rgba(255,255,255,0.55); text-decoration: none; transition: color 0.3s; }
.breadcrumb a:hover { color: var(--white); }
.breadcrumb span.sep { color: rgba(255,255,255,0.3); }
.breadcrumb span.current { color: var(--white); }
.page-header .tag { color: rgba(255,255,255,0.7); }
.page-title {
  font-family: var(--ff-head);
  font-size: clamp(2.4rem, 5.5vw, 4.2rem);
  font-weight: 700;
  line-height: 1.08;
  color: var(--white);
  margin-bottom: 1.25rem;
}
.page-desc {
  max-width: 620px;
  font-size: 1rem;
  font-weight: 300;
  line-height: 1.75;
  color: rgba(255,255,255,0.72);
}

/* ─── PROJECT BLOCK ────────────────────────────────── */
.project-block { padding: 6rem 0; }
.project-block.alt { background: var(--bg-lt); }
.project-block-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4.5rem;
  align-items: center;
  margin-bottom: 3.5rem;
}
.project-block.reverse .project-block-grid { direction: rtl; }
.project-block.reverse .project-block-grid > * { direction: ltr; }
.project-block-media { position: relative; overflow: hidden; border-radius: 8px; box-shadow: 0 24px 60px rgba(27,45,60,0.16); }
.project-block-media img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  display: block;
  transition: transform 0.7s var(--ease);
}
.project-block-media:hover img { transform: scale(1.05); }
.project-block-media::after {
  content: '\2921';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: var(--white);
  background: linear-gradient(to top, rgba(10,20,28,0.45), transparent 55%);
  opacity: 0;
  transition: opacity 0.35s var(--ease);
}
.project-block-media:hover::after { opacity: 1; }
.project-meta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--silver);
  margin-top: 1.5rem;
}
.project-title {
  font-size: clamp(1.5rem, 2.6vw, 2.1rem);
  font-weight: 600;
  color: var(--text);
  line-height: 1.2;
  margin-bottom: 1.25rem;
}
.project-desc {
  font-size: 0.98rem;
  line-height: 1.85;
  color: var(--text-mid);
}

/* ─── GALLERY GRID ─────────────────────────────────── */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  grid-auto-rows: 230px;
  gap: 1.1rem;
}
.gallery-item {
  position: relative;
  overflow: hidden;
  border-radius: 8px;
  cursor: pointer;
}
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.7s var(--ease);
}
.gallery-item:hover img { transform: scale(1.1); }
.gallery-item::after {
  content: '\2921';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: var(--white);
  background: linear-gradient(to top, rgba(10,20,28,0.55), transparent 55%);
  opacity: 0;
  transition: opacity 0.35s var(--ease);
}
.gallery-item:hover::after { opacity: 1; }
.gallery-item.tall { grid-row: span 2; }

/* ─── LIGHTBOX ─────────────────────────────────────── */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(8,14,20,0.94);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s var(--ease);
}
.lightbox.open { opacity: 1; pointer-events: auto; }
.lightbox-figure { margin: 0; max-width: 88vw; max-height: 84vh; }
.lightbox-img {
  max-width: 88vw;
  max-height: 84vh;
  display: block;
  border-radius: 4px;
  transform: scale(0.94);
  transition: transform 0.35s var(--ease);
  box-shadow: 0 30px 80px rgba(0,0,0,0.5);
}
.lightbox.open .lightbox-img { transform: scale(1); }
.lightbox-close, .lightbox-prev, .lightbox-next {
  position: absolute;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.2);
  color: var(--white);
  cursor: pointer;
  transition: background 0.3s, transform 0.3s var(--ease);
  display: flex;
  align-items: center;
  justify-content: center;
}
.lightbox-close:hover, .lightbox-prev:hover, .lightbox-next:hover { background: rgba(255,255,255,0.18); }
.lightbox-close { top: 1.5rem; right: 1.5rem; width: 44px; height: 44px; border-radius: 50%; font-size: 1rem; }
.lightbox-prev, .lightbox-next { top: 50%; transform: translateY(-50%); width: 52px; height: 52px; border-radius: 50%; font-size: 1.8rem; }
.lightbox-prev:hover, .lightbox-next:hover { transform: translateY(-50%) scale(1.08); }
.lightbox-prev { left: 1.5rem; }
.lightbox-next { right: 1.5rem; }
.lightbox-counter {
  position: absolute;
  bottom: 1.75rem; left: 50%;
  transform: translateX(-50%);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.6);
}

/* ─── RESPONSIVE ───────────────────────────────────── */
@media (max-width: 1024px) {
  .project-block-grid { grid-template-columns: 1fr; gap: 2rem; }
  .project-block.reverse .project-block-grid { direction: ltr; }
}
@media (max-width: 768px) {
  .page-header { min-height: 50vh; min-height: 50dvh; padding-top: 5rem; }
  .project-block { padding: 4rem 0; }
  .gallery { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); grid-auto-rows: 150px; gap: 0.6rem; }
  .gallery-item.tall { grid-row: span 2; }
  .lightbox-prev, .lightbox-next { width: 40px; height: 40px; font-size: 1.4rem; }
  .lightbox-prev { left: 0.5rem; }
  .lightbox-next { right: 0.5rem; }
  .lightbox-close { top: 0.75rem; right: 0.75rem; width: 38px; height: 38px; }
}