/* ===== Portfolio page ===== */
.portfolio-intro {
  max-width: 720px;
  margin: 0 auto 48px;
  text-align: center;
  color: var(--color-gray-600);
  font-size: 1.05rem;
  line-height: 1.7;
}

.portfolio-section {
  margin-bottom: 56px;
}

.portfolio-section:last-child {
  margin-bottom: 0;
}

.portfolio-section__title {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-primary);
  display: inline-block;
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.portfolio-grid__item {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  cursor: pointer;
  border: none;
  padding: 0;
  background: var(--color-gray-100);
}

.portfolio-grid__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
  pointer-events: none;
}

.portfolio-grid__item:hover img {
  transform: scale(1.06);
}

.portfolio-grid__item::after {
  content: '⤢';
  position: absolute;
  top: 12px;
  right: 12px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(15, 15, 26, 0.55);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.portfolio-grid__item:hover::after {
  opacity: 1;
}

.portfolio-grid__caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 16px;
  background: linear-gradient(to top, rgba(15, 15, 26, 0.88), transparent);
  color: white;
  font-weight: 600;
  font-size: 0.9rem;
  text-align: left;
  pointer-events: none;
}

.portfolio-cta {
  text-align: center;
  margin-top: 56px;
  padding: 40px;
  background: var(--color-gray-50);
  border-radius: var(--radius-lg);
}

.portfolio-cta p {
  margin-bottom: 20px;
  color: var(--color-gray-600);
}

/* Lightbox */
.portfolio-lightbox {
  position: fixed;
  inset: 0;
  z-index: 11000;
  background: rgba(15, 15, 26, 0.94);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 72px 24px 96px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.portfolio-lightbox--open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.portfolio-lightbox__backdrop {
  position: absolute;
  inset: 0;
  border: none;
  background: transparent;
  cursor: zoom-out;
}

.portfolio-lightbox__stage {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  max-width: min(1100px, 100%);
  width: 100%;
}

.portfolio-lightbox__img {
  display: block;
  max-width: 100%;
  max-height: calc(100vh - 180px);
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: var(--radius-md);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.5);
  user-select: none;
}

.portfolio-lightbox__close,
.portfolio-lightbox__nav {
  position: absolute;
  z-index: 2;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  color: white;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
}

.portfolio-lightbox__close:hover,
.portfolio-lightbox__nav:hover {
  background: rgba(255, 255, 255, 0.22);
}

.portfolio-lightbox__close {
  top: 20px;
  right: 20px;
  width: 44px;
  height: 44px;
  font-size: 1.75rem;
  line-height: 1;
}

.portfolio-lightbox__nav {
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  font-size: 1.75rem;
  line-height: 1;
}

.portfolio-lightbox__nav:hover {
  transform: translateY(-50%) scale(1.05);
}

.portfolio-lightbox__nav--prev {
  left: 16px;
}

.portfolio-lightbox__nav--next {
  right: 16px;
}

.portfolio-lightbox__caption {
  color: white;
  font-weight: 600;
  text-align: center;
  max-width: 100%;
  font-size: 1rem;
}

.portfolio-lightbox__counter {
  color: rgba(255, 255, 255, 0.65);
  font-size: 0.85rem;
}

@media (max-width: 900px) {
  .portfolio-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 540px) {
  .portfolio-grid {
    grid-template-columns: 1fr;
  }

  .portfolio-grid__item {
    aspect-ratio: 16 / 10;
  }

  .portfolio-lightbox {
    padding: 64px 12px 88px;
  }

  .portfolio-lightbox__nav {
    width: 40px;
    height: 40px;
    font-size: 1.4rem;
  }

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

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