/* ─── Fonts ─────────────────────────────────────────────────────────────────── */

@font-face {
  font-family: "Vulf Mono";
  src:
    url("/assets/fonts/vulf-mono/VulfMono-Light.woff2") format("woff2"),
    url("/assets/fonts/vulf-mono/VulfMono-Light.woff") format("woff");
  font-weight: 300;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Vulf Mono";
  src:
    url("/assets/fonts/vulf-mono/VulfMono-LightItalic.woff2") format("woff2"),
    url("/assets/fonts/vulf-mono/VulfMono-LightItalic.woff") format("woff");
  font-weight: 300;
  font-style: italic;
  font-display: swap;
}

@font-face {
  font-family: "Vulf Mono";
  src:
    url("/assets/fonts/vulf-mono/VulfMono-Regular.woff2") format("woff2"),
    url("/assets/fonts/vulf-mono/VulfMono-Regular.woff") format("woff");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Vulf Mono";
  src:
    url("/assets/fonts/vulf-mono/VulfMono-Italic.woff2") format("woff2"),
    url("/assets/fonts/vulf-mono/VulfMono-Italic.woff") format("woff");
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}

@font-face {
  font-family: "Vulf Mono";
  src:
    url("/assets/fonts/vulf-mono/VulfMono-Bold.woff2") format("woff2"),
    url("/assets/fonts/vulf-mono/VulfMono-Bold.woff") format("woff");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Vulf Mono";
  src:
    url("/assets/fonts/vulf-mono/VulfMono-BoldItalic.woff2") format("woff2"),
    url("/assets/fonts/vulf-mono/VulfMono-BoldItalic.woff") format("woff");
  font-weight: 700;
  font-style: italic;
  font-display: swap;
}

@font-face {
  font-family: "Vulf Sans";
  src:
    url("/assets/fonts/vulf-sans/Vulf_Sans-Light.woff2") format("woff2"),
    url("/assets/fonts/vulf-sans/Vulf_Sans-Light.woff") format("woff");
  font-weight: 300;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Vulf Sans";
  src:
    url("/assets/fonts/vulf-sans/Vulf_Sans-Light_Italic.woff2") format("woff2"),
    url("/assets/fonts/vulf-sans/Vulf_Sans-Light_Italic.woff") format("woff");
  font-weight: 300;
  font-style: italic;
  font-display: swap;
}

@font-face {
  font-family: "Vulf Sans";
  src:
    url("/assets/fonts/vulf-sans/Vulf_Sans-Regular.woff2") format("woff2"),
    url("/assets/fonts/vulf-sans/Vulf_Sans-Regular.woff") format("woff");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Vulf Sans";
  src:
    url("/assets/fonts/vulf-sans/Vulf_Sans-Italic.woff2") format("woff2"),
    url("/assets/fonts/vulf-sans/Vulf_Sans-Italic.woff") format("woff");
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}

@font-face {
  font-family: "Vulf Sans";
  src:
    url("/assets/fonts/vulf-sans/Vulf_Sans-Medium.woff2") format("woff2"),
    url("/assets/fonts/vulf-sans/Vulf_Sans-Medium.woff") format("woff");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Vulf Sans";
  src:
    url("/assets/fonts/vulf-sans/Vulf_Sans-Medium_Italic.woff2") format("woff2"),
    url("/assets/fonts/vulf-sans/Vulf_Sans-Medium_Italic.woff") format("woff");
  font-weight: 500;
  font-style: italic;
  font-display: swap;
}

@font-face {
  font-family: "Vulf Sans";
  src:
    url("/assets/fonts/vulf-sans/Vulf_Sans-Bold.woff2") format("woff2"),
    url("/assets/fonts/vulf-sans/Vulf_Sans-Bold.woff") format("woff");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Vulf Sans";
  src:
    url("/assets/fonts/vulf-sans/Vulf_Sans-Bold_Italic.woff2") format("woff2"),
    url("/assets/fonts/vulf-sans/Vulf_Sans-Bold_Italic.woff") format("woff");
  font-weight: 700;
  font-style: italic;
  font-display: swap;
}

/* ─── Design Tokens ────────────────────────────────────────────────────────── */

:root {
  --bg:           #0d0c0b;
  --bg-raised:    #141310;
  --bg-overlay:   #1c1a17;
  --bg-glass:     rgba(13, 12, 11, 0.85);

  --text:         #e2ddd6;
  --text-muted:   #7a756d;
  --text-dim:     #3d3a36;

  --accent:       #c8a96e;
  --accent-soft:  rgba(200, 169, 110, 0.12);

  --border:       rgba(255, 255, 255, 0.07);
  --border-mid:   rgba(255, 255, 255, 0.12);

  --font-sans: "Vulf Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --font-mono: "Vulf Mono", ui-monospace, "SF Mono", "Cascadia Code", monospace;

  --text-xs:   0.7rem;
  --text-sm:   0.82rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.375rem;
  --text-2xl:  1.75rem;

  --radius-sm: 2px;
  --radius:    4px;
  --radius-lg: 8px;

  --grid-gap:     3px;
  --grid-cols:    3;
  --header-h:     52px;
  --gutter:       1.5rem;

  --transition-fast:   150ms ease;
  --transition-base:   250ms ease;
  --transition-slow:   400ms ease;
}

/* ─── Reset & Base ─────────────────────────────────────────────────────────── */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  font-variant-numeric: oldstyle-nums;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

/* ─── View Transitions ─────────────────────────────────────────────────────── */

@view-transition {
  navigation: auto;
}

::view-transition-old(root) {
  animation: vt-fade-out 0.18s ease forwards;
}

::view-transition-new(root) {
  animation: vt-fade-in 0.22s ease forwards;
}

/* Photo element transitions — grid item morphs into hero */
::view-transition-old(.photo-item),
::view-transition-new(.photo-item) {
  animation-duration: 0.3s;
  animation-timing-function: ease;
}

@keyframes vt-fade-out {
  from { opacity: 1; }
  to   { opacity: 0; }
}

@keyframes vt-fade-in {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ─── Accessibility ────────────────────────────────────────────────────────── */

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--gutter);
  background: var(--accent);
  color: var(--bg);
  padding: 0.5rem 1rem;
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius);
  z-index: 9999;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 0.75rem;
}

/* ─── Site Header ──────────────────────────────────────────────────────────── */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  z-index: 100;
  background: var(--bg-glass);
  backdrop-filter: blur(12px) saturate(1.2);
  -webkit-backdrop-filter: blur(12px) saturate(1.2);
  border-bottom: 1px solid var(--border);
  transition: border-color var(--transition-slow);
}

.site-header.is-scrolled {
  border-bottom-color: var(--border-mid);
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding: 0 var(--gutter);
  max-width: 1800px;
  margin: 0 auto;
}

.site-nav__wordmark {
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text);
  opacity: 0.9;
  transition: opacity var(--transition-fast);
}

.site-nav__wordmark:hover {
  opacity: 1;
}

.site-nav__links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.site-nav__link {
  font-size: var(--text-sm);
  color: var(--text-muted);
  padding: 0.35rem 0.65rem;
  border-radius: var(--radius);
  border: none;
  background: none;
  cursor: pointer;
  font-family: var(--font-sans);
  display: flex;
  align-items: center;
  gap: 0.3rem;
  transition: color var(--transition-fast), background var(--transition-fast);
  white-space: nowrap;
}

.site-nav__link:hover,
.site-nav__link.is-active {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
}

.site-nav__link.is-active {
  color: var(--text);
}

.site-nav__caret {
  opacity: 0.5;
  transition: transform var(--transition-fast);
}

.site-nav__collections-toggle[aria-expanded="true"] .site-nav__caret {
  transform: rotate(180deg);
}

/* Collections dropdown */

.site-nav__collections-wrapper {
  position: relative;
}

.collections-menu {
  position: absolute;
  top: calc(100% + 0.5rem);
  right: 0;
  background: var(--bg-overlay);
  border: 1px solid var(--border-mid);
  border-radius: var(--radius-lg);
  min-width: 180px;
  padding: 0.4rem;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.6);
  z-index: 200;
  animation: menu-in var(--transition-fast) ease forwards;
}

.collections-menu[hidden] {
  display: none;
}

@keyframes menu-in {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}

.collections-menu__item {
  display: block;
  padding: 0.45rem 0.75rem;
  font-size: var(--text-sm);
  color: var(--text-muted);
  border-radius: var(--radius);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.collections-menu__item:hover,
.collections-menu__item.is-active {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
}

.collections-menu__item--all {
  color: var(--text-muted);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.collections-menu__divider {
  height: 1px;
  background: var(--border);
  margin: 0.4rem 0;
}

/* ─── Site Main ────────────────────────────────────────────────────────────── */

.site-main {
  flex: 1;
  padding-top: var(--header-h);
}

/* ─── Photo Grid ───────────────────────────────────────────────────────────── */

.photo-grid {
  columns: var(--grid-cols);
  column-gap: var(--grid-gap);
  padding: var(--grid-gap);
  padding-top: var(--grid-gap);
}

.photo-item {
  display: block;
  break-inside: avoid;
  margin-bottom: var(--grid-gap);
  overflow: hidden;
  position: relative;
  background: var(--bg-raised);
  cursor: pointer;
}

.photo-item__img {
  width: 100%;
  height: auto;
  display: block;
  transition:
    transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94),
    opacity 0.4s ease;
  will-change: transform;
}

/* Lazy-loaded images fade in */
.photo-item__img[data-lazy]:not(.is-loaded) {
  opacity: 0;
}

.photo-item__img.is-loaded {
  opacity: 1;
}

.photo-item:hover .photo-item__img {
  transform: scale(1.025);
}

/* Photo title overlay */

.photo-item__overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-end;
  padding: 1.5rem 1rem 0.75rem;
  background: linear-gradient(to top, rgba(0,0,0,0.55) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--transition-base);
  pointer-events: none;
}

.photo-item:hover .photo-item__overlay {
  opacity: 1;
}

.photo-item__title {
  color: #fff;
  font-size: var(--text-sm);
  font-weight: 400;
  letter-spacing: 0.01em;
  line-height: 1.4;
  text-shadow: 0 1px 4px rgba(0,0,0,0.5);
}

/* Empty state */

.photo-grid__empty {
  color: var(--text-muted);
  font-size: var(--text-sm);
  text-align: center;
  padding: 4rem;
  grid-column: 1 / -1;
}

/* ─── Gallery Page ─────────────────────────────────────────────────────────── */

.gallery-page {
  min-height: 100%;
}

.gallery-header {
  padding: 2.5rem var(--gutter) 1.5rem;
  max-width: 680px;
}

.gallery-header__title {
  font-size: var(--text-2xl);
  font-weight: 300;
  letter-spacing: -0.01em;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.gallery-header__description {
  font-size: var(--text-base);
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 0.75rem;
}

.gallery-header__count {
  font-size: var(--text-xs);
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-family: var(--font-mono);
}

/* ─── Pagination ───────────────────────────────────────────────────────────── */

.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  padding: 3rem var(--gutter);
}

.pagination__arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius);
  color: var(--text-muted);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.pagination__arrow:hover:not(.is-disabled) {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
}

.pagination__arrow.is-disabled {
  opacity: 0.25;
  pointer-events: none;
}

.pagination__pages {
  display: flex;
  align-items: center;
  gap: 0.15rem;
}

.pagination__page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 0.5rem;
  font-size: var(--text-sm);
  color: var(--text-muted);
  border-radius: var(--radius);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.pagination__page:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
}

.pagination__page.is-active {
  color: var(--text);
  background: rgba(255, 255, 255, 0.1);
  font-weight: 500;
}

.pagination__ellipsis {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  font-size: var(--text-sm);
  color: var(--text-dim);
}

/* ─── Photo Detail ─────────────────────────────────────────────────────────── */

.photo-detail {
  display: flex;
  flex-direction: column;
  min-height: calc(100dvh - var(--header-h));
}

.photo-detail__stage {
  display: flex;
  align-items: center;
  justify-content: center;
  background: #000;
  min-height: 50vh;
  max-height: 85dvh;
  overflow: hidden;
}

.photo-detail__img {
  width: 100%;
  height: 100%;
  max-height: 85dvh;
  object-fit: contain;
  /* Match the view-transition-name from the grid */
}

.photo-detail__body {
  display: flex;
  gap: 3rem;
  padding: 2rem var(--gutter);
  max-width: 900px;
  flex-wrap: wrap;
}

.photo-detail__info {
  flex: 1;
  min-width: 240px;
}

.photo-detail__title {
  font-size: var(--text-xl);
  font-weight: 300;
  letter-spacing: -0.01em;
  color: var(--text);
  margin-bottom: 0.75rem;
}

.photo-detail__caption {
  font-size: var(--text-base);
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 1rem;
}

.photo-detail__collections {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

/* ─── EXIF Data ────────────────────────────────────────────────────────────── */

.photo-exif {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 0.1rem 1.5rem;
  align-content: start;
  min-width: 240px;
}

.photo-exif__item {
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border);
}

.photo-exif__label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  font-family: var(--font-mono);
  margin-bottom: 0.2rem;
}

.photo-exif__value {
  font-size: var(--text-sm);
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* ─── Photo Navigation ─────────────────────────────────────────────────────── */

.photo-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem var(--gutter) 2.5rem;
  border-top: 1px solid var(--border);
  margin-top: auto;
  gap: 1rem;
}

.photo-nav__link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-muted);
  transition: color var(--transition-fast);
  min-width: 0;
  flex: 1;
}

.photo-nav__link--next {
  justify-content: flex-end;
}

.photo-nav__link:hover {
  color: var(--text);
}

.photo-nav__link.is-disabled {
  opacity: 0;
  pointer-events: none;
}

.photo-nav__label {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: var(--text-sm);
  white-space: nowrap;
}

.photo-nav__thumb-wrap {
  width: 64px;
  height: 48px;
  overflow: hidden;
  border-radius: var(--radius-sm);
  background: var(--bg-raised);
  flex-shrink: 0;
}

.photo-nav__thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity var(--transition-base);
  opacity: 0.7;
}

.photo-nav__link:hover .photo-nav__thumb {
  opacity: 1;
}

.photo-nav__back {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  padding: 0.5rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: color var(--transition-fast), border-color var(--transition-fast);
  flex-shrink: 0;
}

.photo-nav__back:hover {
  color: var(--text-muted);
  border-color: var(--border-mid);
}

/* ─── Collections Index ────────────────────────────────────────────────────── */

.collections-index {
  padding: 3rem var(--gutter);
  max-width: 900px;
}

.collections-index__title {
  font-size: var(--text-2xl);
  font-weight: 300;
  letter-spacing: -0.01em;
  margin-bottom: 2.5rem;
  color: var(--text);
}

.collections-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.collection-card {
  display: block;
  padding: 1.5rem;
  background: var(--bg-raised);
  transition: background var(--transition-fast);
}

.collection-card:hover {
  background: var(--bg-overlay);
}

.collection-card__title {
  font-size: var(--text-lg);
  font-weight: 400;
  color: var(--text);
  margin-bottom: 0.4rem;
}

.collection-card__description {
  font-size: var(--text-sm);
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 0.75rem;
}

.collection-card__count {
  font-size: var(--text-xs);
  color: var(--text-dim);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ─── Tags ─────────────────────────────────────────────────────────────────── */

.tag {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.6rem;
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.tag:hover {
  color: var(--text);
  border-color: var(--border-mid);
}

/* ─── Footer ───────────────────────────────────────────────────────────────── */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem var(--gutter);
}

.site-footer__inner {
  max-width: 1800px;
  margin: 0 auto;
}

.site-footer__copy {
  font-size: var(--text-xs);
  color: var(--text-dim);
}

.site-footer__author {
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.site-footer__author:hover {
  color: var(--text);
}

/* ─── Responsive ───────────────────────────────────────────────────────────── */

@media (max-width: 1100px) {
  :root {
    --grid-cols: 2;
  }
}

@media (max-width: 640px) {
  :root {
    --grid-cols: 1;
    --gutter: 1rem;
    --grid-gap: 2px;
  }

  .site-nav__wordmark {
    font-size: var(--text-xs);
  }

  .photo-detail__stage {
    max-height: 60dvh;
  }

  .photo-detail__body {
    flex-direction: column;
    gap: 1.5rem;
  }

  .photo-nav__thumb-wrap {
    display: none;
  }

  .gallery-header {
    padding: 1.5rem var(--gutter) 1rem;
  }

  .gallery-header__title {
    font-size: var(--text-xl);
  }
}

/* ─── Loading skeleton ─────────────────────────────────────────────────────── */

@keyframes shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position:  200% 0; }
}

.photo-item__img[data-lazy]:not(.is-loaded) {
  background: linear-gradient(
    90deg,
    var(--bg-raised) 0%,
    var(--bg-overlay) 50%,
    var(--bg-raised) 100%
  );
  background-size: 200% 100%;
  animation: shimmer 1.6s ease infinite;
}