/* =========================================================
   PORTFOLIO — gallery v2
   G-01 aspect-aware grid · G-02 cinematic chapters + side rail
   G-03 lightbox · G-04 LQIP shimmer · G-05 srcset via <picture>
   ========================================================= */

/* ---------- HERO ---------- */
.portfolio-hero {
  padding-block: var(--space-9) var(--space-7);
}
.portfolio-hero__eyebrow {
  font-family: var(--font-sans);
  font-size: var(--type-xs);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--text-faint);
  margin: 0 0 var(--space-4);
}
.portfolio-hero__title {
  font-family: var(--font-serif);
  font-size: var(--type-display);
  line-height: 0.95;
  margin: 0;
}
.portfolio-hero__lede {
  margin-top: var(--space-5);
  max-width: 50ch;
  font-size: var(--type-md);
  color: var(--text-muted);
  line-height: 1.6;
}

/* ---------- LAYOUT: side rail + content ---------- */
.portfolio-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-7);
  position: relative;
  padding-bottom: var(--space-10);
}
@media (min-width: 1080px) {
  .portfolio-layout {
    grid-template-columns: 220px 1fr;
    gap: var(--space-9);
  }
}

/* ---------- SIDE RAIL (G-02) ---------- */
.series-rail {
  position: relative;
  display: none;
}
@media (min-width: 1080px) {
  .series-rail {
    display: block;
    position: sticky;
    top: calc(var(--nav-height) + var(--space-5));
    align-self: start;
    max-height: calc(100vh - var(--nav-height) - var(--space-6));
    padding: var(--space-5) 0;
  }
}
.series-rail__title {
  font-family: var(--font-sans);
  font-size: var(--type-xs);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--text-faint);
  margin: 0 0 var(--space-5);
}
.series-rail__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: var(--space-4);
  border-left: 1px solid var(--border);
}
.series-rail__link {
  display: block;
  padding: var(--space-2) 0 var(--space-2) var(--space-4);
  margin-left: -1px;
  border-left: 1px solid transparent;
  font-family: var(--font-serif);
  font-size: var(--type-sm);
  color: var(--text-faint);
  letter-spacing: 0;
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out);
}
.series-rail__link:hover { color: var(--text); }
.series-rail__link[data-active="true"] {
  color: var(--text);
  border-left-color: var(--accent);
}
.series-rail__num {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.625rem;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 2px;
}

/* Mobile: horizontal scroll chips above the gallery */
.series-chips {
  display: flex;
  gap: var(--space-2);
  overflow-x: auto;
  padding: var(--space-3) 0 var(--space-5);
  scrollbar-width: none;
  scroll-snap-type: x mandatory;
  margin-bottom: var(--space-3);
}
.series-chips::-webkit-scrollbar { display: none; }
.series-chips a {
  flex-shrink: 0;
  scroll-snap-align: start;
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: var(--type-xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--text-muted);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color var(--dur-fast), color var(--dur-fast), background var(--dur-fast);
}
.series-chips a[data-active="true"] {
  border-color: var(--text);
  background: var(--text);
  color: var(--surface);
}
@media (min-width: 1080px) { .series-chips { display: none; } }

/* ---------- THEME / CHAPTER (G-02) ---------- */
.theme-section {
  padding-block: var(--space-7);
  border-top: 1px solid var(--border);
  position: relative;
}
.theme-section:first-of-type { border-top: 0; padding-top: var(--space-4); }
.theme-section__header {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  align-items: end;
  margin-bottom: var(--space-7);
}
@media (min-width: 720px) {
  .theme-section__header {
    grid-template-columns: 1fr auto;
    gap: var(--space-6);
  }
}
.theme-section__number {
  font-family: var(--font-sans);
  font-size: var(--type-xs);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--text-faint);
  margin: 0 0 var(--space-3);
}
.theme-section__title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 5vw, var(--type-3xl));
  line-height: 1;
  margin: 0;
  font-weight: 400;
  letter-spacing: -0.01em;
}
.theme-section__title em {
  font-style: italic;
  color: var(--accent);
}
.theme-section__description {
  margin: var(--space-3) 0 0;
  max-width: 50ch;
  font-family: var(--font-serif);
  font-size: var(--type-md);
  font-style: italic;
  color: var(--text-muted);
  line-height: 1.4;
}
.theme-section__meta {
  font-family: var(--font-sans);
  font-size: var(--type-xs);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--text-faint);
  margin: 0;
  text-align: right;
}

/* ---------- MASONRY GRID (CSS columns — true mason, zero JS) ---------- */
.gallery {
  column-count: 1;
  column-gap: var(--space-5);
}
@media (min-width: 560px) { .gallery { column-count: 2; } }
@media (min-width: 960px) { .gallery { column-count: 3; column-gap: var(--space-6); } }

.artwork {
  break-inside: avoid;
  -webkit-column-break-inside: avoid;
  page-break-inside: avoid;
  display: block;
  margin: 0 0 var(--space-6);
}

/* ---------- FRAME + LQIP SHIMMER (G-04) ---------- */
.artwork__frame {
  position: relative;
  display: block;
  background: var(--surface-2);
  overflow: hidden;
  cursor: zoom-in;
  isolation: isolate;
}
.artwork__frame::before {
  /* Shimmer placeholder: warmly tinted, swept by a soft highlight */
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(110deg,
      var(--surface-2) 30%,
      color-mix(in srgb, var(--surface) 90%, var(--stone)) 50%,
      var(--surface-2) 70%);
  background-size: 300% 100%;
  animation: shimmer 1.8s linear infinite;
  z-index: 0;
}
.artwork__frame[data-loaded="true"]::before {
  animation: none;
  opacity: 0;
  transition: opacity var(--dur-base) var(--ease-out);
}
@keyframes shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -100% 0; }
}
@media (prefers-reduced-motion: reduce) {
  .artwork__frame::before { animation: none; }
}

.artwork__frame img,
.artwork__frame picture {
  position: relative;
  display: block;
  width: 100%;
  height: auto;
  z-index: 1;
}
.js .artwork__frame img,
.js .artwork__frame picture {
  opacity: 0;
  transform: scale(1.02);
  transition: opacity 600ms var(--ease-out),
              transform 1.2s var(--ease-out);
}
.js .artwork__frame[data-loaded="true"] img,
.js .artwork__frame[data-loaded="true"] picture {
  opacity: 1;
  transform: scale(1);
}
/* no-js: kill the shimmer, show the image immediately */
html.no-js .artwork__frame::before { animation: none; opacity: 0; }

.artwork__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(26, 23, 20, 0);
  transition: background var(--dur-base) var(--ease-out);
  pointer-events: none;
  z-index: 2;
}
.artwork__frame:hover img { transform: scale(1.04); }
.artwork__frame:hover::after { background: rgba(26, 23, 20, 0.05); }
@media (prefers-reduced-motion: reduce) {
  .artwork__frame img,
  .artwork__frame picture { transition: opacity 200ms linear; transform: none; }
  .artwork__frame:hover img { transform: none; }
}

/* Subtle zoom hint */
.artwork__frame__hint {
  position: absolute;
  right: var(--space-3);
  bottom: var(--space-3);
  z-index: 3;
  width: 32px; height: 32px;
  border-radius: 50%;
  background: rgba(245, 242, 236, 0.92);
  color: #1A1714;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity var(--dur-fast) var(--ease-out),
              transform var(--dur-fast) var(--ease-out);
  pointer-events: none;
}
.artwork__frame:hover .artwork__frame__hint,
.artwork__frame:focus-visible .artwork__frame__hint {
  opacity: 1;
  transform: translateY(0);
}
.artwork__frame__hint svg { width: 14px; height: 14px; stroke-width: 1.6; }

/* ---------- CAPTION ---------- */
.artwork__caption {
  display: grid;
  gap: 2px;
  margin-top: var(--space-3);
  font-family: var(--font-sans);
  font-size: var(--type-xs);
  color: var(--text-muted);
  line-height: 1.4;
}
.artwork__title {
  font-family: var(--font-serif);
  font-size: var(--type-md);
  font-style: italic;
  color: var(--text);
  letter-spacing: 0;
  font-weight: 400;
}
.artwork__title .year { font-style: normal; color: var(--text-faint); margin-left: 0.4em; }
.artwork__meta {
  font-size: var(--type-xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--text-faint);
}

/* ---------- SCROLL REVEAL (G-07-light) ---------- */
.js .artwork { opacity: 0; transform: translateY(12px); transition: opacity 500ms var(--ease-out), transform 500ms var(--ease-out); }
.js .artwork[data-revealed="true"] { opacity: 1; transform: translateY(0); }
/* no-js fallback + reduced-motion: never hide artwork */
html.no-js .artwork { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .js .artwork { opacity: 1; transform: none; transition: none; }
}

.empty-state {
  padding-block: var(--space-9);
  text-align: center;
  color: var(--text-faint);
}

/* ---------- LIGHTBOX (G-03) ---------- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  background: rgba(10, 9, 8, 0.96);
  display: none;
  opacity: 0;
  transition: opacity var(--dur-base) var(--ease-out);
}
.lightbox[data-open="true"] {
  display: grid;
  grid-template-rows: auto 1fr auto;
  opacity: 1;
}
.lightbox__topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  color: rgba(245, 242, 236, 0.9);
  font-family: var(--font-sans);
  font-size: var(--type-xs);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
}
.lightbox__counter { color: rgba(245, 242, 236, 0.55); }
.lightbox__series  { color: rgba(245, 242, 236, 0.95); }

.lightbox__stage {
  position: relative;
  display: grid;
  place-items: center;
  padding: var(--space-3);
  overflow: hidden;
}
.lightbox__image {
  max-width: min(92vw, 1600px);
  max-height: calc(100vh - 220px);
  width: auto;
  height: auto;
  object-fit: contain;
  user-select: none;
  -webkit-user-drag: none;
  transition: opacity var(--dur-base) var(--ease-out);
}
.lightbox__image[data-swapping="true"] { opacity: 0; }

.lightbox__details {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-5);
  align-items: end;
  padding: var(--space-5) var(--space-6) var(--space-6);
  color: rgba(245, 242, 236, 0.95);
  border-top: 1px solid rgba(245, 242, 236, 0.08);
}
.lightbox__title {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  margin: 0;
  line-height: 1.1;
}
.lightbox__meta {
  margin: var(--space-2) 0 0;
  font-family: var(--font-sans);
  font-size: var(--type-xs);
  letter-spacing: var(--tracking-wide);
  color: rgba(245, 242, 236, 0.6);
  text-transform: uppercase;
}

.lightbox__nav {
  display: flex;
  gap: var(--space-2);
}
.lightbox__btn {
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(245, 242, 236, 0.2);
  background: transparent;
  color: rgba(245, 242, 236, 0.9);
  border-radius: 50%;
  cursor: pointer;
  transition: background var(--dur-fast), border-color var(--dur-fast);
}
.lightbox__btn:hover {
  background: rgba(245, 242, 236, 0.08);
  border-color: rgba(245, 242, 236, 0.5);
}
.lightbox__btn:focus-visible {
  outline: 2px solid rgba(245, 242, 236, 0.8);
  outline-offset: 3px;
}
.lightbox__btn[disabled] { opacity: 0.3; cursor: not-allowed; }
.lightbox__btn svg { width: 18px; height: 18px; }

.lightbox__close {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  z-index: 2;
}

/* Edge click zones (prev/next on tap) */
.lightbox__edge {
  position: absolute;
  top: 0; bottom: 0;
  width: 18%;
  background: transparent;
  border: 0;
  cursor: pointer;
  z-index: 1;
  color: transparent;
}
.lightbox__edge--prev { left: 0; }
.lightbox__edge--next { right: 0; }

@media (max-width: 720px) {
  .lightbox__details {
    grid-template-columns: 1fr;
    padding: var(--space-4);
  }
  .lightbox__nav { justify-self: end; }
  .lightbox__image { max-height: calc(100vh - 260px); }
}