/** Masonry portfolio grid + lightbox. */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  grid-auto-rows: 8px; /* JS masonry spans multiples of this row height */
  gap: var(--space-4);
}

/* Fallback when JS masonry is inactive: uniform tiles. */
.no-js .portfolio-grid,
.portfolio-grid:not([data-portfolio-grid]) {
  grid-auto-rows: auto;
}

.portfolio-card {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--color-section);
}

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

.portfolio-card__link {
  display: block;
  position: relative;
}

.portfolio-card__img {
  width: 100%;
  height: auto;
  display: block;
  opacity: 0;
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.portfolio-card__img.is-loaded {
  opacity: 1;
}

.portfolio-card__overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-4);
  text-align: center;
  color: var(--color-white);
  background: var(--color-overlay);
  opacity: 0;
  transition: opacity var(--transition);
}

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

.portfolio-card__link:hover .portfolio-card__img {
  transform: scale(1.05);
}

.portfolio-card__zoom {
  display: inline-grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border: 2px solid var(--color-white);
  border-radius: var(--radius-full);
}

.portfolio-card__title {
  font-family: var(--font-heading);
  font-size: var(--fs-md);
}

/* Lightbox. */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: var(--z-lightbox);
  display: grid;
  place-items: center;
}

.lightbox__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 20, 24, 0.92);
  opacity: 0;
  transition: opacity var(--transition);
}

.lightbox.is-open .lightbox__backdrop {
  opacity: 1;
}

.lightbox__stage {
  position: relative;
  z-index: 1;
  width: min(92vw, 1200px);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
}

.lightbox__figure {
  margin: 0;
  max-height: 88vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  transform: scale(0.96);
  opacity: 0;
  transition:
    transform var(--transition),
    opacity var(--transition);
}

.lightbox.is-open .lightbox__figure {
  transform: none;
  opacity: 1;
}

.lightbox__image {
  max-height: 82vh;
  max-width: 100%;
  width: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}

.lightbox__caption {
  margin-top: var(--space-3);
  color: rgba(255, 255, 255, 0.9);
  font-size: var(--fs-sm);
  text-align: center;
}

.lightbox__btn {
  display: inline-grid;
  place-items: center;
  width: 48px;
  height: 48px;
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-full);
  font-size: 1.4rem;
  transition: background var(--transition-fast);
}

.lightbox__btn:hover {
  background: rgba(255, 255, 255, 0.28);
}

.lightbox__btn--close {
  position: absolute;
  top: calc(-1 * var(--space-7));
  right: 0;
}

.is-lightbox-open {
  overflow: hidden;
}

@media (max-width: 640px) {
  .lightbox__btn--prev,
  .lightbox__btn--next {
    position: absolute;
    bottom: calc(-1 * var(--space-7));
  }
  .lightbox__btn--prev {
    left: 30%;
  }
  .lightbox__btn--next {
    right: 30%;
  }
}