/* ============================================================
   JS ARCHITECTS — Gallery & Project Styles
   gallery.css
   ============================================================ */

/* ── Sub-Navigation (Category Filter) ───────────────────── */
.sub-nav {
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: var(--nav-height);
  z-index: 100;
  padding: 0 var(--space-md);
}

.sub-nav__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 0;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.sub-nav__inner::-webkit-scrollbar { display: none; }

.sub-nav__btn {
  flex-shrink: 0;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-grey);
  padding: 1.1rem 1.2rem;
  border: none;
  background: none;
  cursor: pointer;
  position: relative;
  transition: color var(--transition-fast);
  white-space: nowrap;
}

.sub-nav__btn::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  background-color: var(--color-brass);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.sub-nav__btn:hover { color: var(--color-charcoal); }
.sub-nav__btn:hover::after { transform: scaleX(1); }

.sub-nav__btn.active {
  color: var(--color-charcoal);
}

.sub-nav__btn.active::after {
  transform: scaleX(1);
}

/* ── Project Grid ────────────────────────────────────────── */
.gallery-section {
  padding: var(--space-lg) 0 var(--space-xl);
  background-color: var(--color-offwhite);
  min-height: 60vh;
}

.gallery-count {
  font-size: var(--text-sm);
  color: var(--color-grey);
  margin-bottom: var(--space-md);
  letter-spacing: 0.05em;
}

.gallery-count span { color: var(--color-charcoal); font-weight: 500; }

.project-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

/* ── Project Card ────────────────────────────────────────── */
.project-card {
  position: relative;
  background-color: var(--color-white);
  overflow: hidden;
  cursor: pointer;
  display: block;
  text-decoration: none;
  color: inherit;
  border: 1px solid var(--color-border);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.project-card:hover {
  box-shadow: 0 12px 40px rgba(0,0,0,0.12);
  transform: translateY(-4px);
}

.project-card--hidden {
  display: none;
}

.project-card__img-wrap {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background-color: #e8e4df;
}

.project-card__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 700ms ease;
  display: block;
}

.project-card:hover .project-card__img {
  transform: scale(1.07);
}

.project-card__hover-overlay {
  position: absolute;
  inset: 0;
  background: rgba(26,26,26,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.project-card:hover .project-card__hover-overlay {
  opacity: 1;
}

.project-card__cta {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-white);
  border: 1px solid rgba(255,255,255,0.6);
  padding: 0.75rem 1.5rem;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.project-card:hover .project-card__cta {
  border-color: var(--color-brass);
  color: var(--color-brass);
}

.project-card__body {
  padding: 1.25rem;
}

.project-card__category {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-brass);
  margin-bottom: 6px;
}

.project-card__title {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--color-charcoal);
  margin-bottom: 4px;
  line-height: 1.3;
}

.project-card__location {
  font-size: var(--text-xs);
  color: var(--color-grey);
  display: flex;
  align-items: center;
  gap: 4px;
}

.project-card__location i { font-size: 0.75rem; }

/* Grid transition animation */
.project-card {
  animation: cardIn 400ms ease both;
}

@keyframes cardIn {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── No Results ──────────────────────────────────────────── */
.gallery-empty {
  text-align: center;
  padding: var(--space-xl) 0;
  display: none;
}

.gallery-empty.visible { display: block; }

.gallery-empty__title {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 300;
  color: var(--color-grey);
  margin-bottom: var(--space-sm);
}

/* ── Project Page ─────────────────────────────────────────── */
.project-hero {
  position: relative;
  height: 70vh;
  min-height: 500px;
  overflow: hidden;
  background-color: var(--color-charcoal);
}

.project-hero__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.7;
}

.project-hero__content {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: var(--space-lg) var(--space-md);
  background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, transparent 100%);
}

.project-hero__inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.project-hero__back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.6);
  margin-bottom: var(--space-md);
  transition: color var(--transition-fast);
}

.project-hero__back:hover { color: var(--color-brass); }

.project-hero__category {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-brass);
  margin-bottom: var(--space-xs);
}

.project-hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: 300;
  color: var(--color-white);
  margin-bottom: var(--space-xs);
}

.project-hero__location {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.6);
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Project Info & Description */
.project-info {
  padding: var(--space-lg) 0;
  background-color: var(--color-white);
}

.project-info__grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-lg);
  align-items: start;
}

.project-info__description {
  font-size: 1.05rem;
  line-height: 1.9;
  color: var(--color-grey);
}

.project-info__meta {
  background-color: var(--color-offwhite);
  padding: var(--space-md);
}

.project-info__meta-item {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.project-info__meta-item:last-child { border-bottom: none; }

.project-info__meta-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-brass);
}

.project-info__meta-value {
  font-size: var(--text-sm);
  color: var(--color-charcoal);
}

/* Photo Gallery Grid */
.project-gallery {
  padding: var(--space-lg) 0 var(--space-xl);
  background-color: var(--color-offwhite);
}

.project-gallery__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.project-gallery__item {
  overflow: hidden;
  cursor: zoom-in;
  position: relative;
  background-color: #e8e4df;
}

.project-gallery__item:first-child {
  grid-column: span 2;
  grid-row: span 2;
}

.project-gallery__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 600ms ease;
  aspect-ratio: 4/3;
}

.project-gallery__item:first-child .project-gallery__img {
  aspect-ratio: unset;
  height: 100%;
}

.project-gallery__item:hover .project-gallery__img {
  transform: scale(1.05);
}

/* ── Lightbox ────────────────────────────────────────────── */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0,0,0,0.95);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

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

.lightbox__img {
  max-width: 90vw;
  max-height: 88vh;
  object-fit: contain;
  display: block;
  box-shadow: 0 40px 80px rgba(0,0,0,0.6);
}

.lightbox__close {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,0.7);
  font-size: 1.5rem;
  border: 1px solid rgba(255,255,255,0.2);
  transition: color var(--transition-fast), border-color var(--transition-fast);
  cursor: pointer;
  background: none;
}

.lightbox__close:hover {
  color: var(--color-brass);
  border-color: var(--color-brass);
}

.lightbox__prev,
.lightbox__next {
  position: absolute;
  top: 50%; transform: translateY(-50%);
  width: 48px; height: 48px;
  display: flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,0.7);
  font-size: 1.4rem;
  border: 1px solid rgba(255,255,255,0.2);
  cursor: pointer;
  background: rgba(0,0,0,0.3);
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.lightbox__prev { left: var(--space-md); }
.lightbox__next { right: var(--space-md); }

.lightbox__prev:hover,
.lightbox__next:hover {
  color: var(--color-brass);
  border-color: var(--color-brass);
}

.lightbox__counter {
  position: absolute;
  bottom: var(--space-md);
  left: 50%; transform: translateX(-50%);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: rgba(255,255,255,0.5);
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 1024px) {
  .project-grid { grid-template-columns: repeat(2, 1fr); }
  .project-gallery__grid { grid-template-columns: repeat(2, 1fr); }
  .project-gallery__item:first-child { grid-column: span 2; grid-row: span 1; }
}

@media (max-width: 768px) {
  .project-grid { grid-template-columns: 1fr; }
  .project-gallery__grid { grid-template-columns: 1fr; }
  .project-gallery__item:first-child { grid-column: span 1; }
  .project-info__grid { grid-template-columns: 1fr; }
}