/* ── Filter Bar ──────────────────────────────────────────────── */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 3rem;
}
.filter-btn {
  font-family: var(--font-sub);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.6rem 1.25rem;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  color: var(--clr-text-dim);
  background: transparent;
  transition: var(--transition);
  cursor: pointer;
}
.filter-btn:hover {
  border-color: var(--clr-amber);
  color: var(--clr-amber);
}
.filter-btn.active {
  background: var(--clr-amber);
  border-color: var(--clr-amber);
  color: var(--clr-black);
}

/* ── Portfolio Grid ──────────────────────────────────────────── */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.portfolio-item {
  background: var(--clr-slate);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition), opacity 0.4s ease, transform 0.4s ease;
}
.portfolio-item:hover {
  border-color: var(--clr-amber);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.5), var(--shadow-amber);
}

.portfolio-item.hidden {
  opacity: 0;
  transform: scale(0.95);
  pointer-events: none;
  position: absolute;
  visibility: hidden;
}

.port-img-wrap {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4/3;
}
.port-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.portfolio-item:hover .port-img-wrap img { transform: scale(1.06); }

.port-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.75);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  transition: opacity var(--transition);
}
.portfolio-item:hover .port-overlay { opacity: 1; }
.port-overlay-content { text-align: center; }
.port-overlay-content p {
  font-size: 0.875rem;
  color: rgba(240,235,225,0.9);
  max-width: 28ch;
  margin-inline: auto;
  margin-bottom: 1rem;
}

.port-info { padding: 1.25rem 1.5rem; }
.port-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}
.port-year {
  font-family: var(--font-sub);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--clr-muted);
}
.port-info h3 {
  font-size: 1rem;
  margin-bottom: 0.3rem;
  letter-spacing: 0.03em;
}
.port-location {
  font-size: 0.78rem;
  color: var(--clr-muted);
  max-width: none;
}

/* ── Lightbox ────────────────────────────────────────────────── */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.lightbox.open {
  opacity: 1;
  pointer-events: all;
}
.lightbox-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.88);
  cursor: pointer;
}
.lightbox-panel {
  position: relative;
  z-index: 1;
  background: var(--clr-slate);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  max-width: 900px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  transform: scale(0.95) translateY(20px);
  transition: transform 0.35s cubic-bezier(0.4,0,0.2,1);
  box-shadow: 0 30px 80px rgba(0,0,0,0.7);
}
.lightbox.open .lightbox-panel {
  transform: scale(1) translateY(0);
}
.lightbox-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(0,0,0,0.5);
  color: var(--clr-white);
  font-size: 1.4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  transition: var(--transition);
  border: 1px solid var(--clr-border);
  line-height: 1;
}
.lightbox-close:hover {
  background: var(--clr-amber);
  color: var(--clr-black);
  border-color: var(--clr-amber);
}
.lightbox-img-wrap { overflow: hidden; border-radius: var(--radius-lg) 0 0 var(--radius-lg); }
.lightbox-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 400px;
}
.lightbox-body {
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.lb-meta {
  font-size: 0.82rem;
  color: var(--clr-muted);
  max-width: none;
  margin-top: 0.3rem;
}
.lightbox-body h2 { font-size: 1.6rem; margin-top: 0.5rem; }
.lightbox-body p#lb-desc { font-size: 0.9rem; max-width: none; }

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .portfolio-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .portfolio-grid { grid-template-columns: 1fr; }
  .lightbox-panel { grid-template-columns: 1fr; }
  .lightbox-img-wrap { border-radius: var(--radius-lg) var(--radius-lg) 0 0; }
  .lightbox-img-wrap img { min-height: 220px; max-height: 260px; }
}