:root {
  --ink: #1a1a1a;
  --muted: #6b6b6b;
  --line: #e5e5e5;
  --max: 1280px;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: #ffffff;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
a:hover { color: var(--muted); }

/* Header */
.site-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 28px 32px 18px;
  border-bottom: 1px solid var(--line);
  max-width: var(--max);
  margin: 0 auto;
}
.site-title {
  font-size: 22px;
  font-weight: 500;
  letter-spacing: 0.3px;
}
.site-nav a {
  font-size: 14px;
  margin-left: 18px;
  color: var(--muted);
}
.site-nav a.active { color: var(--ink); font-weight: 600; }

/* Layout */
main { max-width: var(--max); margin: 0 auto; padding: 24px 32px 80px; }

/* Gallery layout */
.gallery-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 40px;
}
.filters h3 {
  margin: 18px 0 6px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--muted);
  font-weight: 600;
}
.filters h3:first-child { margin-top: 0; }
.filter-list { display: flex; flex-direction: column; gap: 2px; }
.filter-pill {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 5px 8px 5px 10px;
  border-left: 2px solid transparent;
  font-size: 14px;
}
.filter-pill:hover { color: var(--muted); }
.filter-pill.active { border-left-color: var(--ink); font-weight: 600; }
.filter-pill .count { color: var(--muted); font-size: 12px; }
.filter-search {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 4px;
  font-family: inherit;
  font-size: 14px;
  margin-bottom: 8px;
  background: #ffffff;
}
.filter-search:focus { outline: none; border-color: var(--ink); }
.active-filter-bar {
  margin-bottom: 16px;
  font-size: 13px;
  color: var(--muted);
}
.active-filter-bar .chip {
  display: inline-block;
  padding: 2px 8px 2px 10px;
  border: 1px solid var(--line);
  border-radius: 12px;
  margin-right: 6px;
  color: var(--ink);
}
.active-filter-bar .chip a { margin-left: 6px; color: var(--muted); }
.active-filter-bar .clear-all { margin-left: 6px; }

/* Grid of works */
.works-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 32px 24px;
}
.work-card { display: block; }
.work-card .image {
  aspect-ratio: 1 / 1;
  background: #fafafa;
  border: 1px solid var(--line);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.work-card .image img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .3s ease;
}
.work-card:hover .image img { transform: scale(1.02); }
.work-card .image-count {
  position: absolute;
  top: 8px; right: 8px;
  background: rgba(0,0,0,0.7);
  color: #fff;
  font-size: 11px;
  padding: 2px 7px;
  border-radius: 10px;
  letter-spacing: 0.3px;
}
.work-card .meta { padding: 10px 2px 0; }
.work-card .title {
  font-style: italic;
  font-size: 15px;
  font-weight: 500;
  margin: 0;
}
.work-card .sub {
  color: var(--muted);
  font-size: 13px;
  margin-top: 2px;
}
.no-image {
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
}

/* Empty state */
.empty {
  text-align: center;
  color: var(--muted);
  padding: 60px 20px;
}

/* Detail page */
.artwork-detail {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 1fr);
  gap: 48px;
  align-items: start;
}

/* Image thread (multi-image vertical scroll) */
.artwork-detail .thread-col {
  display: flex;
  flex-direction: column;
  gap: 32px;
}
.image-thread {
  display: flex;
  flex-direction: column;
  gap: 36px;
}
.thread-item {
  margin: 0;
}
.thread-item img {
  display: block;
  width: 100%;          /* uniform column width */
  height: auto;         /* natural aspect ratio -> varying height */
  background: #fafafa;
  border: 1px solid var(--line);
  cursor: zoom-in;
}
.thread-item figcaption {
  margin-top: 8px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
  font-style: italic;
}
.thread-empty {
  border: 1px solid var(--line);
  padding: 60px 20px;
  text-align: center;
  background: #fafafa;
}

/* Sticky info panel on detail */
.artwork-detail .info {
  position: sticky;
  top: 24px;
  align-self: start;
}
.artwork-detail .info h1 {
  font-size: 28px;
  font-style: italic;
  font-weight: 500;
  margin: 0 0 6px;
}
.artwork-detail .info .yearline {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 24px;
}
.artwork-detail .info .image-count-note {
  margin-top: 20px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--muted);
}
.artwork-detail dl {
  margin: 0;
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 8px 14px;
  font-size: 14px;
}
.artwork-detail dt {
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding-top: 2px;
}
.artwork-detail dd { margin: 0; }
.artwork-detail .back-link {
  display: inline-block;
  margin-bottom: 18px;
  font-size: 13px;
  color: var(--muted);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 24px 32px;
  font-size: 12px;
  color: var(--muted);
  max-width: var(--max);
  margin: 0 auto;
}

/* Lightbox */
.lightbox {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.92);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
  cursor: zoom-out;
}
.lightbox.open { display: flex; }
.lightbox img { max-width: 95vw; max-height: 95vh; object-fit: contain; }
.lightbox .lb-close {
  position: absolute; top: 16px; right: 22px;
  background: none; border: none; color: #fff;
  font-size: 32px; cursor: pointer;
  padding: 6px 12px;
}

@media (max-width: 720px) {
  .gallery-layout { grid-template-columns: 1fr; gap: 16px; }
  .artwork-detail { grid-template-columns: 1fr; gap: 24px; }
  .artwork-detail .info { position: static; }
  .site-header { padding: 18px 20px 12px; }
  main { padding: 18px 20px 60px; }
  .image-thread { gap: 24px; }
}