/* ============================================================
   VYH2 — PORTFOLIO / GALLERY
   ============================================================ */

#portfolio {
  background: var(--color-bg-base);
}

/* ── FILTER TABS ── */
.portfolio__filters {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-bottom: var(--space-10);
}

.filter-btn {
  padding: var(--space-2) var(--space-5);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-text-secondary);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  transition: var(--transition-fast);
  cursor: pointer;
}

.filter-btn:hover {
  color: var(--color-text-primary);
  border-color: rgba(245,166,35,0.3);
  background: rgba(245,166,35,0.05);
}

.filter-btn.active {
  color: var(--color-text-inverse);
  background: var(--color-accent);
  border-color: var(--color-accent);
  box-shadow: 0 0 20px rgba(245,166,35,0.2);
}

/* ── GRID ── */
.portfolio__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

/* ── PORTFOLIO ITEM ── */
.portfolio-item {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--color-border);
  cursor: pointer;
  aspect-ratio: 4/3;
  background: var(--color-bg-surface);
  transition: var(--transition-base);
}

.portfolio-item.hidden {
  display: none;
}

.portfolio-item:hover {
  border-color: rgba(245,166,35,0.3);
  box-shadow: var(--shadow-lg), 0 0 30px rgba(245,166,35,0.08);
  transform: scale(1.02);
}

.portfolio-item--large {
  grid-column: span 2;
  aspect-ratio: 16/9;
}

.portfolio-item__image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
  transition: transform var(--duration-slower) var(--ease-out-expo);
}

.portfolio-item__image.loaded ~ .portfolio-item__placeholder,
.portfolio-item:has(.portfolio-item__image.loaded) .portfolio-item__placeholder {
  display: none;
}

.portfolio-item:hover .portfolio-item__image {
  transform: scale(1.08);
}

/* ── OVERLAY ── */
.portfolio-item__overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  background: linear-gradient(
    to top,
    rgba(6,13,26,0.95) 0%,
    rgba(6,13,26,0.5) 40%,
    transparent 70%
  );
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-in-out);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--space-5);
}

.portfolio-item:hover .portfolio-item__overlay {
  opacity: 1;
}

.portfolio-item__category {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-1);
}

.portfolio-item__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  line-height: var(--leading-tight);
  margin-bottom: var(--space-3);
}

.portfolio-item__zoom {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-inverse);
  transition: var(--transition-fast);
  align-self: flex-end;
}

.portfolio-item__zoom svg { width: 16px; height: 16px; }

.portfolio-item:hover .portfolio-item__zoom {
  transform: scale(1.1);
  box-shadow: 0 0 20px rgba(245,166,35,0.4);
}

/* ── PLACEHOLDER ── */
.portfolio-item__placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  background: linear-gradient(135deg, var(--color-bg-elevated), var(--color-bg-surface));
  color: var(--color-text-muted);
}

.portfolio-item__placeholder svg {
  width: 40px;
  height: 40px;
  color: rgba(245,166,35,0.3);
}

.portfolio-item__placeholder span {
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
}

/* ── LIGHTBOX ── */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  background: rgba(6,13,26,0.96);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-8);
  animation: fade-in-bg 0.3s var(--ease-out-expo);
}

.lightbox.open { display: flex; }

@keyframes fade-in-bg {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.lightbox__inner {
  position: relative;
  max-width: 900px;
  width: 100%;
  animation: scale-in 0.3s var(--ease-out-expo);
}

@keyframes scale-in {
  from { transform: scale(0.92); opacity: 0; }
  to   { transform: scale(1); opacity: 1; }
}

.lightbox__image {
  width: 100%;
  max-height: 70vh;
  object-fit: contain;
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
}

.lightbox__info {
  margin-top: var(--space-4);
  text-align: center;
}

.lightbox__category {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-accent);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  margin-bottom: var(--space-1);
}

.lightbox__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
}

.lightbox__close {
  position: absolute;
  top: -48px;
  right: 0;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--color-glass);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-primary);
  transition: var(--transition-fast);
}

.lightbox__close:hover {
  background: rgba(245,166,35,0.15);
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.lightbox__close svg { width: 18px; height: 18px; }

.lightbox__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: var(--color-glass);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-primary);
  transition: var(--transition-fast);
  cursor: pointer;
}

.lightbox__nav:hover {
  background: rgba(245,166,35,0.15);
  border-color: var(--color-accent);
}

.lightbox__nav svg { width: 20px; height: 20px; }

.lightbox__nav--prev { left: -56px; }
.lightbox__nav--next { right: -56px; }

/* ── RESPONSIVE ── */
@media (max-width: 1024px) {
  .portfolio__grid { grid-template-columns: repeat(2, 1fr); }
  .portfolio-item--large { grid-column: span 2; }
}

@media (max-width: 640px) {
  .portfolio__grid { grid-template-columns: 1fr; }
  .portfolio-item--large { grid-column: span 1; aspect-ratio: 4/3; }
  .lightbox__nav--prev { left: var(--space-2); }
  .lightbox__nav--next { right: var(--space-2); }
}