/* ================================================================
   PORTFOLIO PAGE
   ================================================================ */

/* ── Header ── */
.portfolio-hero {
  padding: calc(var(--nav-height) + var(--space-16)) 0 var(--space-12);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.portfolio-hero__title {
  font-size: clamp(3rem, 7vw, 5rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-4);
}

.portfolio-hero__sub {
  font-size: var(--text-lg);
  color: var(--color-muted);
  max-width: 520px;
}

/* ── Filters ── */
.portfolio-filters {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: var(--nav-height);
  z-index: 10;
}

.portfolio-filters__inner {
  display: flex;
  gap: var(--space-2);
  padding: var(--space-4) 0;
  overflow-x: auto;
  scrollbar-width: none;
}

.portfolio-filters__inner::-webkit-scrollbar {
  display: none;
}

.portfolio-filter {
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-muted);
  border: 1.5px solid transparent;
  background: none;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-base);
}

.portfolio-filter:hover {
  color: var(--color-text);
  border-color: var(--color-border);
}

.portfolio-filter.active {
  color: #111111;
  background: var(--color-accent);
  border-color: var(--color-accent);
}

/* ── Grid ── */
.portfolio-grid-section {
  padding: var(--space-12) 0 var(--space-24);
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-auto-rows: 280px;
  gap: var(--space-4);
}

/* Make first item span 2 columns for visual interest */
.portfolio-item:first-child {
  grid-column: span 2;
}

.portfolio-item {
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
}

.portfolio-item__inner {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.portfolio-item__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
  display: block;
}

.portfolio-item:hover .portfolio-item__img {
  transform: scale(1.05);
}

.portfolio-item__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.75) 0%, transparent 50%);
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  padding: var(--space-5) var(--space-6);
  opacity: 0;
  transition: opacity var(--transition-base);
}

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

.portfolio-item__category {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-1);
}

.portfolio-item__title {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-text);
}

.portfolio-item__zoom {
  width: 40px;
  height: 40px;
  background: rgba(255,255,255,0.15);
  backdrop-filter: blur(8px);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
  flex-shrink: 0;
  transition: background var(--transition-fast);
}

.portfolio-item__zoom:hover {
  background: var(--color-accent);
  color: #111111;
}

/* Hidden state for filtering */
.portfolio-item.hidden {
  display: none;
}

/* Empty state */
.portfolio-empty {
  text-align: center;
  padding: var(--space-24) 0;
  color: var(--color-muted);
  font-size: var(--text-lg);
}

/* ── Lightbox ── */
.lightbox__backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.95);
  z-index: 200;
}

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 201;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox__content {
  position: relative;
  max-width: 90vw;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.lightbox__img {
  max-width: 90vw;
  max-height: 80vh;
  object-fit: contain;
  border-radius: var(--radius-md);
  display: block;
}

.lightbox__caption {
  margin-top: var(--space-4);
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.6);
  text-align: center;
}

.lightbox__close {
  position: fixed;
  top: var(--space-6);
  right: var(--space-6);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  color: var(--color-text);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast);
  z-index: 202;
}

.lightbox__close:hover {
  background: rgba(255,255,255,0.2);
}

.lightbox__arrow {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  color: var(--color-text);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast);
  z-index: 202;
}

.lightbox__arrow:hover {
  background: var(--color-accent);
  color: #111111;
}

.lightbox__arrow--prev { left: var(--space-6); }
.lightbox__arrow--next { right: var(--space-6); }

/* Active nav link */
.nav__link--active {
  color: var(--color-accent) !important;
}

.nav__link--active::after {
  width: 100% !important;
  background: var(--color-accent);
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .portfolio-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .portfolio-item:first-child {
    grid-column: span 2;
  }
}

@media (max-width: 640px) {
  .portfolio-grid {
    grid-template-columns: 1fr;
  }

  .portfolio-item:first-child {
    grid-column: span 1;
  }

  .portfolio-item__overlay {
    opacity: 1;
  }

  .lightbox__arrow--prev { left: var(--space-3); }
  .lightbox__arrow--next { right: var(--space-3); }
}