/* Vivid Explainer: the library hub's identity (brand direction: "Vivid or Elegant Explainer", docs/reports §21).
   Bricolage Grotesque headings, IBM Plex Sans text, a five-hue system with one hue per site, soft corners, motion on.
   Hues are decorative here (frames, bands, dots): in light mode none reaches 4.5:1 for text, so text stays ink. */
:root {
  --h-a: #ff4f3a; --h-b: #2f6bff; --h-c: #14b88a; --h-d: #ffb21c; --h-e: #a24bff;
  --bg: #fffdf7; --surface: #f5f1e8; --ink: #16121f; --ink-soft: #2e2838; --muted: #5a5466; --rule: #e4ddd0;
  --accent: #1f4fd6; --accent-ink: #fff; --link: #1f4fd6; --focus: #1f4fd6; --mark: rgba(47,107,255,.12);
  --font-display: "Bricolage Grotesque", "Arial Black", system-ui, sans-serif;
  --font-body: "IBM Plex Sans", system-ui, sans-serif; --font-ui: var(--font-body); --font-sans: var(--font-body);
  --fs-body: 1.0625rem; --lh-body: 1.6; --radius: 12px; --wide: 72rem;
  --card-bg: #fff; --card-shadow: 0 1px 0 rgba(22,18,31,.06), 0 8px 24px -12px rgba(22,18,31,.18);
  --card-shadow-hi: 0 2px 0 rgba(22,18,31,.06), 0 22px 40px -16px rgba(22,18,31,.32);
}
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) {
  --h-a: #ff6a55; --h-b: #5c8bff; --h-c: #2fd4a3; --h-d: #ffc247; --h-e: #b979ff;
  --bg: #1b1626; --surface: #241e31; --ink: #fff8ef; --ink-soft: #ece4d8; --muted: #b9b0c8; --rule: #3a3149;
  --accent: #8fb0ff; --accent-ink: #16121f; --link: #8fb0ff; --focus: #8fb0ff; --mark: rgba(92,139,255,.2);
  --card-bg: #221c2f; --card-shadow: 0 1px 0 rgba(0,0,0,.3), 0 8px 24px -12px rgba(0,0,0,.6);
  --card-shadow-hi: 0 2px 0 rgba(0,0,0,.3), 0 22px 40px -16px rgba(0,0,0,.8);
} }
:root[data-theme="dark"] {
  --h-a: #ff6a55; --h-b: #5c8bff; --h-c: #2fd4a3; --h-d: #ffc247; --h-e: #b979ff;
  --bg: #1b1626; --surface: #241e31; --ink: #fff8ef; --ink-soft: #ece4d8; --muted: #b9b0c8; --rule: #3a3149;
  --accent: #8fb0ff; --accent-ink: #16121f; --link: #8fb0ff; --focus: #8fb0ff; --mark: rgba(92,139,255,.2);
  --card-bg: #221c2f; --card-shadow: 0 1px 0 rgba(0,0,0,.3), 0 8px 24px -12px rgba(0,0,0,.6);
  --card-shadow-hi: 0 2px 0 rgba(0,0,0,.3), 0 22px 40px -16px rgba(0,0,0,.8);
}

body { background: var(--bg); color: var(--ink); font-family: var(--font-body); }
h1, h2, h3, .wordmark { font-family: var(--font-display); letter-spacing: -.03em; }
.wordmark { font-weight: 800; font-size: 1.3rem; }
.wordmark .wm-a { color: var(--h-a); } .wordmark .wm-b { color: var(--h-b); }

/* hero */
.gallery-page { max-width: var(--wide); margin: 0 auto; padding: 0 var(--gutter) 3rem; }
.g-hero { padding: clamp(1.5rem, 5vw, 3.5rem) 0 1.25rem; display: grid; gap: .6rem; }
.g-kicker { margin: 0; font: 500 .8rem/1 var(--font-body); letter-spacing: .14em; text-transform: uppercase; color: var(--muted); }
.g-hero h1 { margin: 0; font-weight: 800; font-size: clamp(2.3rem, 7.5vw, 4.8rem); line-height: .98; max-width: 14ch; text-wrap: balance; }
.g-dek { margin: .2rem 0 0; font-size: clamp(1.05rem, 2.2vw, 1.3rem); color: var(--ink-soft); max-width: 46ch; }

/* subject chips */
.g-filters ul { list-style: none; margin: .5rem 0 1.5rem; padding: 0; display: flex; flex-wrap: wrap; gap: .5rem; }
.chip { display: inline-flex; align-items: center; gap: .45rem; min-height: 44px; padding: .45rem 1rem; border-radius: 999px;
  border: 1.5px solid var(--rule); color: var(--ink); text-decoration: none; font-weight: 500; background: var(--card-bg);
  transition: transform .25s cubic-bezier(.34,1.56,.64,1), border-color .2s, background .2s; }
.chip:hover { transform: translateY(-2px); border-color: var(--ink); }
.chip[aria-current] { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.chip-n { font-size: .8em; opacity: .7; font-variant-numeric: tabular-nums; }

/* cards */
.gallery { list-style: none; margin: 0; padding: 0; display: grid; gap: clamp(1rem, 2.5vw, 1.75rem);
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 19rem), 1fr)); }
.card { --hue: var(--h-b); min-width: 0; }
.card.hue-a { --hue: var(--h-a); } .card.hue-b { --hue: var(--h-b); } .card.hue-c { --hue: var(--h-c); }
.card.hue-d { --hue: var(--h-d); } .card.hue-e { --hue: var(--h-e); }
.card-link { display: flex; flex-direction: column; height: 100%; color: inherit; text-decoration: none; background: var(--card-bg);
  border-radius: 14px; overflow: hidden; box-shadow: var(--card-shadow); border: 1px solid var(--rule);
  transition: transform .35s cubic-bezier(.34,1.56,.64,1), box-shadow .3s; }
.card-shot { display: block; position: relative; aspect-ratio: 16 / 10; background: var(--hue); padding: 10px 10px 0; overflow: hidden; }
.card-shot img { display: block; width: 100%; height: 100%; object-fit: cover; object-position: top left; border-radius: 8px 8px 0 0;
  transition: transform .5s cubic-bezier(.34,1.56,.64,1); }
.card-ph { display: grid; place-items: center; height: 100%; padding: 1rem; font: 800 1.6rem/1.05 var(--font-display); color: #16121f; text-align: center; }
.card-body { display: grid; gap: .35rem; padding: 1rem 1.15rem 1.15rem; flex: 1; align-content: start; }
.card-subject { display: inline-flex; align-items: center; gap: .45rem; font-size: .78rem; font-weight: 500; letter-spacing: .06em;
  text-transform: uppercase; color: var(--muted); }
.card-subject .dot { width: .7rem; height: .7rem; border-radius: 50%; background: var(--hue); flex: none; }
.card-title { font: 800 1.45rem/1.08 var(--font-display); letter-spacing: -.025em; }
.card-tag { color: var(--ink-soft); font-size: .98rem; }
.card-go { margin-top: .4rem; font-weight: 600; color: var(--link); }
.card-go span { display: inline-block; transition: transform .3s cubic-bezier(.34,1.56,.64,1); }
.card-link:hover, .card-link:focus-visible { transform: translateY(-6px) rotate(-.4deg); box-shadow: var(--card-shadow-hi); }
.card-link:hover img, .card-link:focus-visible img { transform: scale(1.04) translateY(-4px); }
.card-link:hover .card-go span, .card-link:focus-visible .card-go span { transform: translateX(5px); }
.card-link:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; }

/* entrance: cards rise in, staggered (motion on by default; off for reduced motion) */
@keyframes rise { from { opacity: 0; transform: translateY(18px) scale(.98); } to { opacity: 1; transform: none; } }
.card, .card.enter { animation: rise .55s cubic-bezier(.34,1.56,.64,1) both; animation-delay: calc(var(--i, 0) * 70ms); }
.g-empty { color: var(--muted); }
.g-more { margin-top: 3rem; max-width: 42rem; }
.g-more h2 { font-size: 1.5rem; }

@media (prefers-reduced-motion: reduce) {
  .card, .card.enter { animation: none; }
  .card-link, .card-shot img, .chip, .card-go span { transition: none; }
  .card-link:hover, .card-link:focus-visible { transform: none; }
  .card-link:hover img, .card-link:focus-visible img { transform: none; }
}