/* ============================================
   PORTFOLIO PAGE STYLES
   Gallery, Filters & Lightbox Modal
   ============================================ */

/* Filter Bar */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-xs);
  margin-bottom: var(--space-xl);
}

.filter-btn {
  padding: 0.625rem 1.5rem;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  background-color: transparent;
  border: 1px solid var(--color-border);
  transition: var(--transition);
  cursor: pointer;
}

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

.filter-btn.active {
  background-color: var(--color-text);
  color: var(--color-white);
  border-color: var(--color-text);
}

/* Portfolio Grid */
.portfolio-section {
  padding-top: 0;
  padding-bottom: var(--space-3xl);
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.portfolio-card {
  overflow: hidden;
  transition: var(--transition);
}

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

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

.portfolio-card:not(.hidden) {
  animation: portfolioFadeIn 0.5s ease forwards;
}

.portfolio-card__trigger {
  position: relative;
  display: block;
  width: 100%;
  padding: 0;
  border: none;
  cursor: pointer;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background-color: var(--color-bg-alt);
}

.portfolio-card__trigger img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.portfolio-card__trigger:hover img {
  transform: scale(1.08);
}

.portfolio-card__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(17, 17, 17, 0.85) 0%,
    rgba(17, 17, 17, 0.3) 50%,
    transparent 100%
  );
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: flex-start;
  padding: var(--space-md);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.portfolio-card__trigger:hover .portfolio-card__overlay,
.portfolio-card__trigger:focus .portfolio-card__overlay {
  opacity: 1;
}

.portfolio-card__category {
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.25rem;
}

.portfolio-card__title {
  font-family: var(--font-serif);
  font-size: 1.375rem;
  font-weight: 500;
  color: var(--color-white);
  margin-bottom: var(--space-sm);
}

.portfolio-card__view {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.8);
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.5);
  color: var(--color-white);
  font-size: 1.25rem;
  opacity: 0;
  transition: var(--transition);
}

.portfolio-card__trigger:hover .portfolio-card__view {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

.portfolio-card__trigger:hover .portfolio-card__view {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
}

/* Empty State */
.portfolio-empty {
  text-align: center;
  padding: var(--space-2xl);
  color: var(--color-text-muted);
}

.portfolio-empty i {
  font-size: 3rem;
  color: var(--color-border);
  margin-bottom: var(--space-md);
}

.portfolio-empty p {
  font-size: 1.0625rem;
}

/* ============================================
   LIGHTBOX MODAL
   ============================================ */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s ease, visibility 0.4s ease;
}

.lightbox.active {
  opacity: 1;
  visibility: visible;
}

.lightbox__backdrop {
  position: absolute;
  inset: 0;
  background-color: rgba(17, 17, 17, 0.92);
  cursor: pointer;
}

.lightbox__container {
  position: relative;
  z-index: 1;
  width: 90vw;
  max-width: 1100px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  transform: scale(0.95) translateY(20px);
  transition: transform 0.4s ease;
}

.lightbox.active .lightbox__container {
  transform: scale(1) translateY(0);
}

.lightbox__close {
  position: absolute;
  top: -48px;
  right: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-size: 1.25rem;
  border: 1px solid rgba(255, 255, 255, 0.3);
  background: transparent;
  cursor: pointer;
  transition: var(--transition);
  z-index: 2;
}

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

.lightbox__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-size: 1rem;
  border: 1px solid rgba(255, 255, 255, 0.3);
  background: rgba(17, 17, 17, 0.5);
  cursor: pointer;
  transition: var(--transition);
  z-index: 2;
}

.lightbox__nav:hover {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
}

.lightbox__nav--prev {
  left: -64px;
}

.lightbox__nav--next {
  right: -64px;
}

.lightbox__content {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  background-color: var(--color-white);
  overflow: hidden;
  max-height: 90vh;
}

.lightbox__image-wrap {
  overflow: hidden;
  background-color: var(--color-bg-dark);
  min-height: 300px;
}

.lightbox__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 400px;
  max-height: 70vh;
}

.lightbox__info {
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow-y: auto;
}

.lightbox__category {
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
}

.lightbox__title {
  font-size: 2rem;
  margin-bottom: var(--space-md);
}

.lightbox__desc {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: var(--space-lg);
}

.lightbox__meta {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border);
  font-size: 0.8125rem;
  color: var(--color-text-light);
}

.lightbox__meta span::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  background-color: var(--color-accent);
  margin-right: var(--space-xs);
  vertical-align: middle;
}

/* Body lock when lightbox open */
body.lightbox-open {
  overflow: hidden;
}

/* ============================================
   RESPONSIVE
   ============================================ */

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

  .lightbox__nav--prev {
    left: 8px;
  }

  .lightbox__nav--next {
    right: 8px;
  }

  .lightbox__content {
    grid-template-columns: 1fr;
  }

  .lightbox__image {
    min-height: 280px;
    max-height: 50vh;
  }

  .lightbox__close {
    top: 8px;
    right: 8px;
    background-color: rgba(17, 17, 17, 0.6);
  }
}

@media (max-width: 768px) {
  .portfolio-grid {
    grid-template-columns: 1fr;
  }

  .filter-btn {
    padding: 0.5rem 1rem;
    font-size: 0.6875rem;
  }

  .lightbox__container {
    width: 95vw;
  }

  .lightbox__info {
    padding: var(--space-md);
  }

  .lightbox__title {
    font-size: 1.5rem;
  }

  .lightbox__nav {
    width: 40px;
    height: 40px;
  }
}

@media (max-width: 480px) {
  .filter-bar {
    gap: 0.375rem;
  }

  .filter-btn {
    padding: 0.4rem 0.75rem;
    font-size: 0.625rem;
  }
}