/* ============================================================
   Digital Consciousness — Human × AI split gallery
   Cleaner museum-dark redesign
   ============================================================ */
:root {
  --bg:        #0c0c0e;
  --bg-2:      #141416;
  --panel:     #17171a;
  --panel-2:   #1d1d21;
  --line:      #2a2a30;
  --text:      #ece9e3;
  --muted:     #9b988f;
  --faint:     #6c6a64;
  --human:     #c9a96a;   /* warm gold  */
  --human-dim: rgba(201,169,106,.14);
  --ai:        #79c7d6;   /* cool steel */
  --ai-dim:    rgba(121,199,214,.14);
  --shadow:    0 18px 50px rgba(0,0,0,.55);
  --serif:  'Playfair Display', Georgia, 'Times New Roman', serif;
  --sans:   'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  --header-h: 70px;
}

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

html, body { height: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-weight: 300;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { display: block; }

/* ---------- header ---------- */
header {
  position: sticky; top: 0; z-index: 60;
  height: var(--header-h);
  display: flex; align-items: center; gap: 28px;
  padding: 0 30px;
  background: rgba(12,12,14,.82);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; flex-direction: column; line-height: 1.1; }
.brand .logo {
  font-family: var(--serif); font-weight: 700; font-size: 1.35rem;
  letter-spacing: .02em;
}
.brand .tagline {
  font-size: .66rem; letter-spacing: .34em; text-transform: uppercase;
  color: var(--muted); margin-top: 3px;
}
.header-stats { margin-left: auto; display: flex; gap: 26px; }
.hstat { text-align: right; }
.hstat .n { font-family: var(--serif); font-size: 1.05rem; font-weight: 600; }
.hstat .n.human { color: var(--human); }
.hstat .n.ai    { color: var(--ai); }
.hstat .l { font-size: .58rem; letter-spacing: .22em; text-transform: uppercase; color: var(--faint); }

/* ---------- carousel ---------- */
.carousel {
  position: relative;
  height: 62vh; min-height: 380px;
  overflow: hidden;
  background: #000;
  border-bottom: 1px solid var(--line);
}
.carousel .slide {
  position: absolute; inset: 0;
  opacity: 0; transition: opacity 1.1s ease;
  background-size: cover; background-position: center;
  transform: scale(1.04);
}
.carousel .slide.on { opacity: 1; animation: kenburns 8s ease-out both; }
@keyframes kenburns { from { transform: scale(1.02); } to { transform: scale(1.12); } }
.carousel::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(to top, rgba(8,8,10,.92) 0%, rgba(8,8,10,.15) 45%, rgba(8,8,10,.35) 100%);
}
.carousel-cap {
  position: absolute; left: 0; right: 0; bottom: 0; z-index: 3;
  padding: 34px 40px; cursor: pointer;
  display: flex; align-items: flex-end; justify-content: space-between; gap: 20px;
}
.carousel-cap .ttl { font-family: var(--serif); font-size: 2rem; font-weight: 600; }
.carousel-cap .sub { color: var(--muted); font-size: .9rem; margin-top: 4px; letter-spacing: .04em; }
.carousel-tag {
  font-size: .6rem; letter-spacing: .26em; text-transform: uppercase;
  padding: 6px 12px; border: 1px solid var(--line); border-radius: 999px; white-space: nowrap;
}
.carousel-tag.human { color: var(--human); border-color: var(--human-dim); background: var(--human-dim); }
.carousel-tag.ai    { color: var(--ai);    border-color: var(--ai-dim);    background: var(--ai-dim); }
.carousel-hint {
  position: absolute; top: 18px; right: 22px; z-index: 3;
  font-size: .58rem; letter-spacing: .24em; text-transform: uppercase; color: var(--faint);
}

/* ---------- split ---------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  height: calc(100vh - var(--header-h));
}
.pane {
  position: relative;
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-width: thin;
}
.pane.human { background: linear-gradient(180deg, rgba(201,169,106,.04), transparent 240px); }
.pane.ai    { background: linear-gradient(180deg, rgba(121,199,214,.04), transparent 240px);
              border-left: 1px solid var(--line); }
.pane::-webkit-scrollbar { width: 9px; }
.pane::-webkit-scrollbar-thumb { background: var(--line); border-radius: 6px; }

.pane-head {
  position: sticky; top: 0; z-index: 10;
  padding: 20px 22px 14px;
  background: linear-gradient(180deg, var(--bg) 70%, transparent);
  backdrop-filter: blur(6px);
}
.pane-title { display: flex; align-items: baseline; gap: 12px; }
.pane-title h2 { font-family: var(--serif); font-size: 1.5rem; font-weight: 600; letter-spacing: .01em; }
.pane.human .pane-title h2 { color: var(--human); }
.pane.ai    .pane-title h2 { color: var(--ai); }
.pane-title .count { font-size: .72rem; letter-spacing: .18em; text-transform: uppercase; color: var(--faint); }
.pane-sub { font-size: .74rem; color: var(--muted); margin-top: 2px; letter-spacing: .05em; }

.pane-controls { display: flex; gap: 10px; margin-top: 14px; flex-wrap: wrap; align-items: center; }
.search {
  flex: 1 1 160px; min-width: 120px;
  background: var(--panel); border: 1px solid var(--line); color: var(--text);
  padding: 8px 12px; border-radius: 8px; font-family: var(--sans); font-size: .82rem;
}
.search:focus { outline: none; border-color: var(--faint); }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.seg button {
  background: transparent; color: var(--muted); border: 0; cursor: pointer;
  padding: 8px 14px; font-family: var(--sans); font-size: .74rem; letter-spacing: .06em;
}
.seg button.on { background: var(--human-dim); color: var(--human); }
.pane.ai .seg button.on { background: var(--ai-dim); color: var(--ai); }

/* grid of thumbnails */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(132px, 1fr));
  gap: 10px;
  padding: 6px 20px 40px;
}
.card {
  position: relative; aspect-ratio: 1 / 1; overflow: hidden; border-radius: 8px;
  background: var(--panel-2); cursor: pointer; border: 1px solid transparent;
  transition: transform .18s ease, border-color .18s ease;
}
.card img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; background: var(--panel-2); }
.card:hover { transform: translateY(-3px); }
.pane.human .card:hover { border-color: var(--human-dim); }
.pane.ai    .card:hover { border-color: var(--ai-dim); }
.card:hover img { transform: scale(1.07); }
.card .cap {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 16px 9px 7px; font-size: .68rem; color: #f4f1ea;
  background: linear-gradient(to top, rgba(0,0,0,.82), transparent);
  opacity: 0; transition: opacity .2s ease;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.card:hover .cap { opacity: 1; }
.empty { padding: 60px 20px; text-align: center; color: var(--faint); grid-column: 1/-1; }

/* ---------- lightbox ---------- */
.lightbox {
  position: fixed; inset: 0; z-index: 200; display: none;
  background: rgba(6,6,8,.94); backdrop-filter: blur(6px);
  align-items: center; justify-content: center; padding: 30px;
}
.lightbox.on { display: flex; }
.lb-inner { display: flex; gap: 26px; max-width: 1200px; width: 100%; max-height: 90vh; }
.lb-img { flex: 1 1 auto; display: flex; align-items: center; justify-content: center; min-width: 0; }
.lb-img img { max-width: 100%; max-height: 90vh; border-radius: 6px; box-shadow: var(--shadow); }
.lb-meta { flex: 0 0 300px; align-self: center; }
.lb-meta .k { font-size: .6rem; letter-spacing: .24em; text-transform: uppercase; color: var(--faint); margin-bottom: 6px; }
.lb-meta h3 { font-family: var(--serif); font-size: 1.9rem; font-weight: 600; margin-bottom: 8px; }
.lb-meta .artist { color: var(--muted); margin-bottom: 18px; }
.lb-meta .desc { color: var(--muted); line-height: 1.7; font-size: .9rem; margin-bottom: 18px; }
.lb-tag { display: inline-block; font-size: .62rem; letter-spacing: .2em; text-transform: uppercase; padding: 6px 12px; border-radius: 999px; }
.lb-tag.human { color: var(--human); background: var(--human-dim); }
.lb-tag.ai    { color: var(--ai);    background: var(--ai-dim); }
.lb-close { position: fixed; top: 22px; right: 28px; font-size: 2.2rem; color: var(--muted); cursor: pointer; line-height: 1; background: none; border: 0; }
.lb-close:hover { color: var(--text); }

footer { padding: 22px; text-align: center; color: var(--faint); font-size: .68rem; letter-spacing: .18em; text-transform: uppercase; border-top: 1px solid var(--line); }

.loading { padding: 50px; text-align: center; color: var(--faint); grid-column: 1/-1; font-size: .85rem; letter-spacing: .1em; }

/* ---------- responsive ---------- */
@media (max-width: 820px) {
  .split { grid-template-columns: 1fr; height: auto; }
  .pane { overflow: visible; }
  .pane.ai { border-left: 0; border-top: 1px solid var(--line); }
  .header-stats { display: none; }
  .carousel { height: 46vh; min-height: 280px; }
  .carousel-cap .ttl { font-size: 1.4rem; }
  .lb-inner { flex-direction: column; overflow-y: auto; }
  .lb-meta { flex: none; }
}