/* --------------------------------------------------------------------------
   Gallery styles — warm dark theme, a little editorial, still readable
   -------------------------------------------------------------------------- */

:root {
  /* Typography */
  --font-ui: "DM Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-display: "Newsreader", "Georgia", "Times New Roman", serif;

  /* Surfaces */
  --bg-deep: #0c0a08;
  --bg-elevated: #141210;
  --bg-card: #1a1714;
  --bg-stage: #0b0c12;
  --text-primary: #f4f0e8;
  --text-muted: #b8b0a4;
  --text-subtle: #7d7569;

  /* Borders & dividers (single source of truth) */
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-medium: rgba(255, 255, 255, 0.1);
  --border-card: rgba(255, 255, 255, 0.04);

  /* Accent */
  --accent: #e8b86d;
  --accent-rgb: 232, 184, 109;
  --accent-soft: rgba(var(--accent-rgb), 0.12);
  --accent-border: rgba(var(--accent-rgb), 0.4);
  --accent-fill: rgba(var(--accent-rgb), 0.2);

  /* Shadows */
  --shadow-card: 0 18px 50px rgba(0, 0, 0, 0.35), 0 0 0 1px var(--border-card);
  --shadow-card-hover: 0 22px 60px rgba(0, 0, 0, 0.45);
  --glow-accent: 0 0 0 1px rgba(var(--accent-rgb), 0.2), 0 24px 80px rgba(0, 0, 0, 0.55);
  --shadow-lightbox: var(--glow-accent), 0 40px 120px rgba(0, 0, 0, 0.65);

  /* Overlays */
  --overlay-card-dark: rgba(10, 11, 15, 0.72);
  --overlay-backdrop: rgba(5, 6, 10, 0.82);

  /* Layout */
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 10px;
  --radius-pill: 999px;
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2.25rem;
  --space-2xl: 3.5rem;
  --max-width: 1120px;
  --grid-gap: var(--space-lg);

  /* Breakpoints (reference for media queries; align JS if you add matchMedia) */
  --bp-lg: 75rem; /* 1200px */
  --bp-md: 60rem; /* 960px */
  --bp-sm: 32.5rem; /* 520px */

  /* Motion (durations first — referenced by transition tokens) */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-soft: cubic-bezier(0.4, 0, 0.2, 1);
  --dur-fast: 160ms;
  --dur-med: 280ms;
  --dur-slow: 520ms;
  --transition-transform: transform var(--dur-med) var(--ease-out);
  --transition-shadow: box-shadow var(--dur-med) var(--ease-out);
  --transition-opacity: opacity var(--dur-med) var(--ease-soft);
  --transition-image: transform var(--dur-slow) var(--ease-out), filter var(--dur-med) var(--ease-soft);

  /* Image hover (thumbnail) */
  --img-zoom-rest: scale(1.04);
  --img-zoom-hover: scale(1.1);
}

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

html {
  color-scheme: dark;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-ui);
  font-size: 1rem;
  line-height: 1.65;
  background: radial-gradient(1200px 800px at 12% -8%, rgba(232, 184, 109, 0.07), transparent 52%),
    radial-gradient(800px 520px at 96% 6%, rgba(255, 200, 150, 0.04), transparent 48%), var(--bg-deep);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
}

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

button {
  font: inherit;
  color: inherit;
  border: none;
  background: none;
  cursor: pointer;
}

/* Screen-reader-only labels (kept visible to AT, hidden visually) */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Skip link for keyboard users */
.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.skip-link:focus {
  left: var(--space-md);
  top: var(--space-md);
  width: auto;
  height: auto;
  padding: var(--space-sm) var(--space-md);
  background: var(--text-primary);
  color: var(--bg-deep);
  border-radius: var(--radius-sm);
  z-index: 1000;
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */
.site-header {
  padding: var(--space-2xl) var(--space-lg) var(--space-xl);
  border-bottom: 1px solid var(--border-subtle);
}

.site-header__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  animation: fade-up var(--dur-slow) var(--ease-out) both;
}

.site-header__eyebrow {
  margin: 0 0 var(--space-sm);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
}

.site-header__title {
  margin: 0 0 var(--space-md);
  font-family: var(--font-display);
  font-size: clamp(2.15rem, 4.2vw, 2.85rem);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.02em;
}

.site-header__subtitle {
  margin: 0;
  max-width: 54ch;
  color: var(--text-muted);
  font-size: 1.0625rem;
}

/* --------------------------------------------------------------------------
   Main + gallery section
   -------------------------------------------------------------------------- */
.main {
  padding: var(--space-xl) var(--space-lg) var(--space-2xl);
}

.gallery-section {
  max-width: var(--max-width);
  margin: 0 auto;
}

.gallery-section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
  animation: fade-up var(--dur-slow) var(--ease-out) 80ms both;
}

.gallery-section__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.gallery-section__hint {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-subtle);
}

/* Responsive grid: 4 → 3 → 2 → 1 columns */
.gallery-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--grid-gap);
}

@media (max-width: 75rem) {
  .gallery-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 60rem) {
  .gallery-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 32.5rem) {
  .gallery-grid {
    grid-template-columns: 1fr;
  }
}

.gallery-grid__item {
  animation: fade-up var(--dur-slow) var(--ease-out) both;
}

/* Stagger fade-in for grid items */
.gallery-grid__item:nth-child(1) {
  animation-delay: 120ms;
}
.gallery-grid__item:nth-child(2) {
  animation-delay: 160ms;
}
.gallery-grid__item:nth-child(3) {
  animation-delay: 200ms;
}
.gallery-grid__item:nth-child(4) {
  animation-delay: 240ms;
}
.gallery-grid__item:nth-child(5) {
  animation-delay: 280ms;
}
.gallery-grid__item:nth-child(6) {
  animation-delay: 320ms;
}
.gallery-grid__item:nth-child(7) {
  animation-delay: 360ms;
}
.gallery-grid__item:nth-child(8) {
  animation-delay: 400ms;
}

/* --------------------------------------------------------------------------
   Gallery card (thumbnail + hover overlay)
   -------------------------------------------------------------------------- */
.gallery-card {
  position: relative;
  width: 100%;
  text-align: left;
  padding: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-card);
  box-shadow: var(--shadow-card);
  transition: var(--transition-transform), var(--transition-shadow);
}

.gallery-card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.gallery-card:hover,
.gallery-card:focus-visible {
  transform: translateY(-4px) scale(1.01);
  box-shadow: var(--glow-accent), var(--shadow-card-hover);
}

.gallery-card__media {
  display: block;
  aspect-ratio: 3 / 2;
  overflow: hidden;
}

.gallery-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: var(--img-zoom-rest);
  transition: var(--transition-image);
  filter: saturate(1.02) contrast(1.02);
}

/* Subtle zoom + clarity on hover/focus */
.gallery-card:hover .gallery-card__media img,
.gallery-card:focus-visible .gallery-card__media img {
  transform: var(--img-zoom-hover);
  filter: saturate(1.08) contrast(1.05);
}

.gallery-card__overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: linear-gradient(180deg, transparent 0%, var(--overlay-card-dark) 100%);
  opacity: 0;
  transition: var(--transition-opacity);
}

.gallery-card:hover .gallery-card__overlay,
.gallery-card:focus-visible .gallery-card__overlay {
  opacity: 1;
}

.gallery-card__overlay-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  transform: translateY(8px);
  transition: var(--transition-transform);
}

.gallery-card:hover .gallery-card__overlay-inner,
.gallery-card:focus-visible .gallery-card__overlay-inner {
  transform: translateY(0);
}

.gallery-card__icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-pill);
  display: grid;
  place-items: center;
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--text-primary);
  background: var(--accent-fill);
  border: 1px solid var(--accent-border);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

.gallery-card__overlay-text {
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text-primary);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.site-footer {
  padding: var(--space-xl) var(--space-lg);
  border-top: 1px solid var(--border-subtle);
}

.site-footer__text {
  margin: 0 auto;
  max-width: var(--max-width);
  font-size: 0.875rem;
  color: var(--text-subtle);
}

.site-footer__code {
  font-size: 0.8125em;
  padding: 0.15em 0.4em;
  border-radius: 4px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
}

/* --------------------------------------------------------------------------
   Lightbox
   -------------------------------------------------------------------------- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 900;
  display: grid;
  place-items: center;
  padding: var(--space-lg);
}

.lightbox[hidden] {
  display: none;
}

.lightbox__backdrop {
  position: absolute;
  inset: 0;
  background: var(--overlay-backdrop);
  backdrop-filter: blur(10px);
  opacity: 0;
  animation: fade-in var(--dur-med) var(--ease-soft) forwards;
}

.lightbox__panel {
  position: relative;
  z-index: 2;
  width: min(1040px, 100%);
  max-height: min(92vh, 900px);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  border-radius: calc(var(--radius-lg) + 4px);
  padding: var(--space-md);
  background: linear-gradient(145deg, rgba(22, 25, 34, 0.96), rgba(16, 18, 26, 0.96));
  border: 1px solid var(--border-medium);
  box-shadow: var(--shadow-lightbox);
  transform: translateY(12px) scale(0.98);
  opacity: 0;
  animation: lightbox-in var(--dur-med) var(--ease-out) forwards;
}

.lightbox__figure {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  min-height: 0;
}

.lightbox__stage {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-stage);
  box-shadow: inset 0 0 0 1px var(--border-subtle);
  min-height: min(58vh, 560px);
  display: grid;
  place-items: center;
}

.lightbox__image {
  width: 100%;
  max-height: min(58vh, 560px);
  object-fit: contain;
  opacity: 0;
  transform: scale(1.02);
  transition: var(--transition-opacity), transform var(--dur-med) var(--ease-out);
}

.lightbox__image.is-visible {
  opacity: 1;
  transform: scale(1);
}

.lightbox__meta {
  display: grid;
  gap: var(--space-xs);
  padding: 0 var(--space-sm) var(--space-xs);
}

.lightbox__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.lightbox__caption {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
  max-width: 70ch;
}

.lightbox__counter {
  margin: var(--space-xs) 0 0;
  font-size: 0.8125rem;
  color: var(--text-subtle);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* Close control */
.lightbox__close {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  z-index: 5;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-pill);
  display: grid;
  place-items: center;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-medium);
  font-size: 1.5rem;
  line-height: 1;
  transition: background var(--dur-fast) var(--ease-soft), transform var(--dur-fast) var(--ease-soft);
}

.lightbox__close:hover {
  background: rgba(var(--accent-rgb), 0.18);
  transform: rotate(90deg);
}

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

/* Prev / next arrows */
.lightbox__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 5;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-pill);
  background: rgba(10, 11, 15, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.12);
  display: grid;
  place-items: center;
  transition: background var(--dur-fast) var(--ease-soft), border-color var(--dur-fast) var(--ease-soft),
    transform var(--dur-fast) var(--ease-soft);
}

.lightbox__nav:hover {
  background: rgba(var(--accent-rgb), 0.16);
  border-color: rgba(var(--accent-rgb), 0.38);
}

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

.lightbox__nav--prev {
  left: var(--space-sm);
}

.lightbox__nav--next {
  right: var(--space-sm);
}

.lightbox__chevron {
  width: 10px;
  height: 10px;
  border-top: 2px solid var(--text-primary);
  border-right: 2px solid var(--text-primary);
  display: block;
}

.lightbox__nav--prev .lightbox__chevron {
  transform: rotate(-135deg);
  margin-left: 3px;
}

.lightbox__nav--next .lightbox__chevron {
  transform: rotate(45deg);
  margin-right: 3px;
}

@media (max-width: 640px) {
  .lightbox__nav {
    width: 42px;
    height: 42px;
  }

  .lightbox__nav--prev {
    left: var(--space-xs);
  }

  .lightbox__nav--next {
    right: var(--space-xs);
  }

  .lightbox__panel {
    padding: var(--space-sm);
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .gallery-card:hover,
  .gallery-card:focus-visible {
    transform: none;
  }

  .gallery-card:hover .gallery-card__media img,
  .gallery-card:focus-visible .gallery-card__media img {
    transform: scale(1.04);
  }
}

/* Keyframes */
@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes lightbox-in {
  from {
    opacity: 0;
    transform: translateY(18px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}