/* =======================================================
   KARLENE — PORTFOLIO PAGE STYLESHEET
   Cinematic dark grid. Warm amber-gold accents.
   CSS columns masonry layout. Filter tabs. Lightbox.
   All section styles scoped to .portfolio-page or .pf-* / .portfolio-* BEM blocks.
   ======================================================= */

/* -------------------------------------------------------
   PORTFOLIO PAGE — PAGE-LEVEL BASE
   ------------------------------------------------------- */

.portfolio-page {
  background-color: var(--color-bg-dark);
  color: var(--color-text-on-dark);
}

/* Screen-reader only utility (used for visually hidden h2) */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* -------------------------------------------------------
   SHARED TYPOGRAPHY (portfolio page scope)
   ------------------------------------------------------- */

.pf-label {
  display: block;
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-amber);
  margin-bottom: var(--space-6);
}

/* -------------------------------------------------------
   01. HERO — DARK FULL BLEED
   ------------------------------------------------------- */

.pf-hero {
  position: relative;
  width: 100%;
  height: 85svh;
  min-height: 480px;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
}

.pf-hero__image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 35%;
  display: block;
}

.pf-hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(15, 13, 10, 0.80) 0%,
    rgba(15, 13, 10, 0.35) 45%,
    rgba(15, 13, 10, 0.15) 100%
  );
}

.pf-hero__content {
  position: relative;
  z-index: 2;
  padding: clamp(2.5rem, 6vw, 5rem) clamp(1.5rem, 6vw, 5rem);
  max-width: 900px;
}

.pf-hero__title {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(3.5rem, 9vw, 7.5rem);
  font-weight: 500;
  line-height: 1.0;
  letter-spacing: -0.025em;
  color: var(--color-white);
  margin: 0 0 var(--space-5);
}

.pf-hero__title em {
  font-style: italic;
}

.pf-hero__subtitle {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.45);
  margin: 0;
}

@media (max-width: 767px) {
  .pf-hero {
    height: 70svh;
    min-height: 400px;
  }

  .pf-hero__content {
    padding: 2rem 1.5rem;
  }
}

/* -------------------------------------------------------
   02. GALLERY — FILTER + MASONRY GRID
   ------------------------------------------------------- */

.pf-gallery {
  background-color: var(--color-bg-dark);
  padding: clamp(3rem, 6vw, 5rem) clamp(1rem, 3vw, 2rem);
}

/* -- Filter bar -- */

.pf-filter {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: clamp(2rem, 4vw, 3.5rem);
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  padding-bottom: var(--space-1); /* prevent clipping on scroll */
}

.pf-filter::-webkit-scrollbar {
  display: none;
}

.pf-filter__btn {
  flex-shrink: 0;
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-on-dark-muted);
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.10);
  border-radius: var(--radius-full);
  padding: var(--space-2) var(--space-5);
  cursor: pointer;
  transition:
    color var(--transition),
    border-color var(--transition),
    background-color var(--transition);
  min-height: 44px; /* touch target */
}

.pf-filter__btn:hover {
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.25);
}

.pf-filter__btn:focus-visible {
  outline: 2px solid var(--color-amber);
  outline-offset: 2px;
}

.pf-filter__btn--active {
  color: var(--color-bg-dark);
  background-color: var(--color-amber);
  border-color: var(--color-amber);
}

.pf-filter__btn--active:hover {
  color: var(--color-bg-dark);
  background-color: var(--color-accent-light);
  border-color: var(--color-accent-light);
}

/* -- Masonry grid (CSS columns) -- */

.pf-grid {
  columns: 1;
  column-gap: clamp(0.5rem, 1.5vw, 1rem);
}

/* -- Individual portfolio item -- */

.portfolio-item {
  display: block;
  break-inside: avoid;
  margin-bottom: clamp(0.5rem, 1.5vw, 1rem);
  position: relative;
  overflow: hidden;
  cursor: pointer;
  border-radius: var(--radius-sm);
  width: 100%;
  border: 0;
  padding: 0;
  background: transparent;
  font: inherit;
  color: inherit;
  text-align: inherit;
  appearance: none;
}

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

.portfolio-item img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  transition: transform 0.55s var(--ease-spring);
}

/* Hover: subtle scale on the image */
.portfolio-item:hover img,
.portfolio-item:focus-visible img {
  transform: scale(1.03);
}

/* Caption overlay — slides up on hover */
.portfolio-item__caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-6) var(--space-5) var(--space-4);
  background: linear-gradient(to top, rgba(15,13,10,0.75) 0%, transparent 100%);
  opacity: 0;
  transform: translateY(4px);
  transition:
    opacity 0.3s var(--ease-out),
    transform 0.3s var(--ease-out);
  pointer-events: none;
}

.portfolio-item:hover .portfolio-item__caption,
.portfolio-item:focus-visible .portfolio-item__caption {
  opacity: 1;
  transform: translateY(0);
}

.portfolio-item__cat {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.70);
}

/* Focus ring for keyboard navigation */
.portfolio-item:focus-visible {
  outline: 2px solid var(--color-amber);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* Column counts at breakpoints */
@media (min-width: 640px) {
  .pf-grid {
    columns: 2;
  }
}

@media (min-width: 1100px) {
  .pf-grid {
    columns: 3;
  }
}

@media (min-width: 1600px) {
  .pf-grid {
    columns: 4;
  }
}

/* -------------------------------------------------------
   03. LIGHTBOX — FULL-SCREEN IMAGE VIEWER
   ------------------------------------------------------- */

.portfolio-lightbox {
  position: fixed;
  inset: 0;
  z-index: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s var(--ease-out);
}

.portfolio-lightbox--open {
  pointer-events: all;
  opacity: 1;
}

.portfolio-lightbox__backdrop {
  position: absolute;
  inset: 0;
  background-color: rgba(10, 9, 7, 0.94);
  cursor: zoom-out;
}

.portfolio-lightbox__img-wrap {
  position: relative;
  z-index: 1;
  max-width: 90vw;
  max-height: 88svh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.portfolio-lightbox__img {
  display: block;
  max-width: 100%;
  max-height: 88svh;
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: var(--radius-sm);
  box-shadow: 0 32px 80px rgba(0, 0, 0, 0.7);
  transition: opacity 0.2s var(--ease-out);
}

/* Close button */
.portfolio-lightbox__close {
  position: absolute;
  top: var(--space-6);
  right: var(--space-6);
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-full);
  color: rgba(255, 255, 255, 0.70);
  cursor: pointer;
  transition:
    background-color var(--transition),
    color var(--transition),
    border-color var(--transition);
}

.portfolio-lightbox__close:hover {
  background: rgba(255, 255, 255, 0.15);
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.25);
}

.portfolio-lightbox__close:focus-visible {
  outline: 2px solid var(--color-amber);
  outline-offset: 2px;
}

/* Prev / Next navigation */
.portfolio-lightbox__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.10);
  border-radius: var(--radius-full);
  color: rgba(255, 255, 255, 0.65);
  cursor: pointer;
  transition:
    background-color var(--transition),
    color var(--transition),
    border-color var(--transition);
}

.portfolio-lightbox__nav:hover {
  background: rgba(255, 255, 255, 0.14);
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.22);
}

.portfolio-lightbox__nav:focus-visible {
  outline: 2px solid var(--color-amber);
  outline-offset: 2px;
}

.portfolio-lightbox__prev {
  left: var(--space-6);
}

.portfolio-lightbox__next {
  right: var(--space-6);
}

/* Counter — bottom centre */
.portfolio-lightbox__counter {
  position: absolute;
  bottom: var(--space-6);
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: 0.12em;
  color: rgba(255, 255, 255, 0.40);
  pointer-events: none;
}

@media (max-width: 639px) {
  .portfolio-lightbox__prev {
    left: var(--space-3);
  }

  .portfolio-lightbox__next {
    right: var(--space-3);
  }

  .portfolio-lightbox__close {
    top: var(--space-4);
    right: var(--space-4);
  }

  .portfolio-lightbox__img-wrap {
    max-width: 96vw;
  }
}

/* -------------------------------------------------------
   04. CTA — DARK MINIMAL
   ------------------------------------------------------- */

.pf-cta {
  background-color: var(--color-bg-dark-2);
  padding: var(--space-section) clamp(1.5rem, 6vw, 3rem);
  border-top: 1px solid var(--color-border-dark);
}

.pf-cta__inner {
  max-width: 680px;
}

.pf-cta__heading {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 500;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--color-white);
  margin: 0 0 var(--space-6);
}

.pf-cta__heading em {
  font-style: italic;
}

.pf-cta__body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: 300;
  line-height: 1.8;
  color: var(--color-text-on-dark-muted);
  margin: 0 0 var(--space-10);
  max-width: 52ch;
}

.pf-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: center;
}

/* -------------------------------------------------------
   05. SCROLL ANIMATION — .animate-on-scroll
   Minimal fade-up. Respects prefers-reduced-motion.
   ------------------------------------------------------- */

@media (prefers-reduced-motion: no-preference) {
  .portfolio-page .animate-on-scroll {
    opacity: 0;
    transform: translateY(20px);
    transition:
      opacity 0.65s var(--ease-spring),
      transform 0.65s var(--ease-spring);
  }

  .portfolio-page .animate-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
  }
}