@import url('https://fonts.googleapis.com/css2?family=Elms+Sans:ital,wght@0,100..900;1,100..900&display=swap');

:root {
  /* Palette – warm phosphor / CRT */
  --color-bg:          #222831;
  --color-surface:     #31363F;
  --color-surface-2:   #76ABAE;
  --color-border:      #31363F;
  --color-border-hover:#3a4248;
  --color-text:        #EEEEEE;
  --color-muted:       #cccccc;
  --color-accent:      #76ABAE;
  --color-accent-dim:  #76ABAE;
  --color-accent-glow: rgba(212, 168, 75, 0.18);

  /* Typography */
  --font-ui:           "Elms Sans", sans-serif;
  --font-display:      "Elms Sans", sans-serif;

  /* Spacing */
  --space-xs:          0.25rem;
  --space-sm:          0.5rem;
  --space-md:          1rem;
  --space-lg:          1.5rem;
  --space-xl:          2.25rem;
  --space-2xl:         3.5rem;

  /* Layout – larger catalog tiles */
  --header-height:     3.25rem;
  --gallery-gap:       1rem;
  --thumb-min:         18rem;   /* was 11rem – fewer, larger tiles */
  --radius:            3px;
  --border-width:      1px;
  --max-width:         96rem;

  /* Motion */
  --ease:              cubic-bezier(0.25, 0.1, 0.25, 1);
  --duration-fast:     100ms;
  --duration:          200ms;
  --duration-slow:     320ms;

  /* Lightbox */
  --lb-bg:             rgba(6, 7, 8, 0.96);
  --lb-bar-height:     3.25rem;
  --lb-safe-pad:       max(var(--space-md), env(safe-area-inset-bottom));
}

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

html {
  font-size: 16px;
  font-weight: semiBold;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-ui);
  font-size: 0.8125rem;
  line-height: 1.45;
  min-height: 100vh;
  min-height: 100dvh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: color-mix(in srgb, var(--color-surface) 72%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: var(--border-width) solid var(--color-border);
  display: flex;
  align-items: center;
}

.header-inner {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  padding-left: max(var(--space-lg), env(safe-area-inset-left));
  padding-right: max(var(--space-lg), env(safe-area-inset-right));
  display: flex;
  align-items: baseline;
  gap: var(--space-md);
}

.site-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--color-accent);
}

.site-meta {
  color: var(--color-muted);
  font-size: 1.35rem;
  letter-spacing: 0.02em;
}

/* ---------- Gallery ---------- */
.gallery-wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg) var(--space-2xl);
  padding-left: max(var(--space-lg), env(safe-area-inset-left));
  padding-right: max(var(--space-lg), env(safe-area-inset-right));
  padding-bottom: max(var(--space-2xl), env(safe-area-inset-bottom));
}

.status {
  text-align: center;
  color: var(--color-muted);
  padding: var(--space-2xl) 0;
  font-size: 0.875rem;
  letter-spacing: 0.03em;
}

.status[hidden] {
  display: none;
}

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(var(--thumb-min), 1fr));
  gap: var(--gallery-gap);
}

.gallery-item {
  position: relative;
  aspect-ratio: 16 / 10;
  background: var(--color-surface);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  /* Performance: skip off-screen layout/paint work */
  content-visibility: auto;
  contain-intrinsic-size: auto 280px;
  transition:
    border-color var(--duration) var(--ease),
    box-shadow var(--duration) var(--ease);
}

.gallery-item:hover,
.gallery-item:focus-visible {
  border-color: var(--color-border-hover);
  box-shadow: 0 0 0 1px var(--color-accent-glow);
  outline: none;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  opacity: 0;
  transition: opacity var(--duration-slow) var(--ease);
  /* Prevent layout shift & decode cost */
  background: var(--color-surface-2);
}

.gallery-item img.loaded {
  opacity: 1;
}

.gallery-item .placeholder {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    105deg,
    var(--color-surface) 20%,
    var(--color-surface-2) 45%,
    var(--color-surface) 70%
  );
  background-size: 220% 100%;
  animation: shimmer 1.6s ease-in-out infinite;
}

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

/* ---------- Lightbox ---------- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: var(--lb-bg);
  display: flex;
  flex-direction: column;
  opacity: 0;
  visibility: hidden;
  transition:
    opacity var(--duration) var(--ease),
    visibility var(--duration) var(--ease);
  /* Prevent background scroll on iOS */
  overscroll-behavior: none;
  touch-action: none;
}

.lightbox.is-open {
  opacity: 1;
  visibility: visible;
}

.lightbox[hidden] {
  display: none;
}

.lightbox-stage {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  min-height: 0;
  padding: var(--space-md);
  padding-top: max(var(--space-md), env(safe-area-inset-top));
}

.lightbox-image {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  opacity: 0;
  transition: opacity var(--duration-slow) var(--ease);
  /* Avoid filtering cost */
  image-rendering: auto;
}

.lightbox-image.is-visible {
  opacity: 1;
}

.lightbox-spinner {
  position: absolute;
  width: 1.75rem;
  height: 1.75rem;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.65s linear infinite;
}

.lightbox-spinner.is-hidden {
  display: none;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.lightbox-close,
.lightbox-nav {
  position: absolute;
  background: var(--color-surface);
  border: var(--border-width) solid var(--color-border);
  color: var(--color-text);
  font-family: var(--font-ui);
  cursor: pointer;
  z-index: 10;
  border-radius: var(--radius);
  transition:
    color var(--duration-fast) var(--ease),
    border-color var(--duration-fast) var(--ease),
    background var(--duration-fast) var(--ease);
  /* Larger hit targets */
  min-width: 2.75rem;
  min-height: 2.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox-close:hover,
.lightbox-nav:hover,
.lightbox-close:focus-visible,
.lightbox-nav:focus-visible {
  color: var(--color-accent);
  border-color: var(--color-accent-dim);
  outline: none;
}

.lightbox-close {
  top: max(var(--space-md), env(safe-area-inset-top));
  right: max(var(--space-md), env(safe-area-inset-right));
  font-size: 1.5rem;
  line-height: 1;
}

.lightbox-nav {
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.75rem;
  line-height: 1;
}

.lightbox-prev {
  left: max(var(--space-sm), env(safe-area-inset-left));
}

.lightbox-next {
  right: max(var(--space-sm), env(safe-area-inset-right));
}

.lightbox-bar {
  height: auto;
  min-height: var(--lb-bar-height);
  background: var(--color-surface);
  border-top: var(--border-width) solid var(--color-border);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-sm) var(--space-md);
  padding: var(--space-sm) var(--space-lg);
  padding-bottom: var(--lb-safe-pad);
  padding-left: max(var(--space-lg), env(safe-area-inset-left));
  padding-right: max(var(--space-lg), env(safe-area-inset-right));
  font-size: 0.75rem;
}

.lightbox-name {
  flex: 1 1 8rem;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--color-text);
}

.lightbox-counter {
  color: var(--color-muted);
  flex-shrink: 0;
}

.lightbox-download {
  color: var(--color-accent);
  text-decoration: none;
  border: var(--border-width) solid var(--color-accent-dim);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius);
  flex-shrink: 0;
  transition:
    background var(--duration-fast) var(--ease),
    color var(--duration-fast) var(--ease);
}

.lightbox-download:hover {
  background: var(--color-accent);
  color: var(--color-bg);
}

/* ---------- Responsive – larger tiles + mobile first ---------- */

/* Tablet */
@media (max-width: 64rem) {
  :root {
    --thumb-min: 15rem;
    --gallery-gap: 0.85rem;
  }
}

/* Phone landscape / large phone */
@media (max-width: 48rem) {
  :root {
    --thumb-min: 12.5rem;
    --space-lg: 1rem;
    --header-height: 3rem;
  }

  .gallery-wrap {
    padding-top: var(--space-lg);
  }

  .lightbox-nav {
    min-width: 2.5rem;
    min-height: 2.5rem;
    font-size: 1.5rem;
  }
}

/* Phone portrait – 2 columns, larger readable tiles */
@media (max-width: 36rem) {
  :root {
    --thumb-min: calc(50% - var(--gallery-gap) / 2);
    --gallery-gap: 0.65rem;
    --space-xl: 1.25rem;
  }

  .gallery {
    grid-template-columns: 1fr 1fr;
  }

  .gallery-item {
    aspect-ratio: 4 / 3;
    contain-intrinsic-size: auto 160px;
  }

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

  .lightbox-bar {
    gap: var(--space-sm);
    font-size: 0.7rem;
  }

  .lightbox-download {
    padding: 0.35rem 0.6rem;
  }
}

/* Very small */
@media (max-width: 22rem) {
  .gallery {
    grid-template-columns: 1fr;
  }

  :root {
    --thumb-min: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  body::after {
    display: none;
  }
}