:root {
  --paper: #eee9df;
  --ink: #171715;
  --muted: #77736c;
  --gap: clamp(28px, 4vw, 72px);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
  -webkit-font-smoothing: antialiased;
}

button { font: inherit; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
  padding: 22px 28px 18px;
  background: color-mix(in srgb, var(--paper) 90%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(23, 23, 21, 0.12);
}

.wordmark {
  justify-self: start;
  font-weight: 800;
  letter-spacing: 0.31em;
  font-size: clamp(20px, 2.2vw, 32px);
  line-height: 1;
}

.collection-tabs {
  grid-column: 2;
  display: flex;
  align-items: center;
  gap: 24px;
}

.collection-tab {
  appearance: none;
  border: 0;
  border-bottom: 1px solid transparent;
  padding: 3px 0 5px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 10px;
  line-height: 1;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  transition: color 160ms ease, border-color 160ms ease;
}

.collection-tab:hover { color: var(--ink); }
.collection-tab.active {
  color: var(--ink);
  border-bottom-color: var(--ink);
}


main { padding: 0 28px 80px; }

.intro {
  min-height: 36vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 72px 0 42px;
  border-bottom: 1px solid rgba(23, 23, 21, 0.18);
}

.eyebrow {
  margin: 0 0 14px;
  font-size: 10px;
  line-height: 1;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--muted);
}

.intro h1 {
  margin: 0;
  font-size: clamp(44px, 8vw, 124px);
  line-height: 0.9;
  letter-spacing: -0.055em;
  font-weight: 500;
}

.intro-copy {
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: 13px;
  line-height: 1.45;
  letter-spacing: 0.02em;
  color: var(--muted);
}

.cover-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--gap);
  padding-top: var(--gap);
}

.cover-card {
  min-width: 0;
  cursor: pointer;
}

.cover-image-wrap {
  background: transparent;
  overflow: hidden;
  aspect-ratio: 2 / 3;
}

.cover-card img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 280ms ease, filter 280ms ease, opacity 280ms ease;
  will-change: transform;
}

.cover-meta {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding-top: 9px;
  opacity: 0;
  transform: translateY(3px);
  transition: opacity 220ms ease, transform 220ms ease;
}

.cover-title {
  font-size: 11px;
  line-height: 1.25;
}

.cover-index {
  font-size: 10px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.cover-grid:has(.cover-card:hover) .cover-card:not(:hover) img {
  opacity: 0.44;
  filter: saturate(0.75);
}

.cover-card:hover img,
.cover-card:focus-within img {
  transform: scale(1.024);
}

.cover-card:hover .cover-meta,
.cover-card:focus-within .cover-meta {
  opacity: 1;
  transform: translateY(0);
}

.cover-button {
  display: block;
  padding: 0;
  margin: 0;
  width: 100%;
  border: 0;
  background: transparent;
  cursor: pointer;
  text-align: left;
}

.empty-state {
  min-height: 42vh;
  display: grid;
  place-items: center;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}


.about-credit {
  max-width: 56ch;
  margin: clamp(54px, 8vw, 110px) 0 0 auto;
  padding-top: 14px;
  border-top: 1px solid rgba(23, 23, 21, 0.18);
}

.viewer {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  grid-template-columns: minmax(52px, 1fr) minmax(0, auto) minmax(52px, 1fr);
  align-items: center;
  background: rgba(238, 233, 223, 0.98);
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms ease;
}

.viewer.open {
  opacity: 1;
  pointer-events: auto;
}

.viewer-figure {
  margin: 0;
  display: grid;
  justify-items: center;
  gap: 14px;
}

.viewer-figure img {
  display: block;
  max-width: min(72vw, 720px);
  max-height: 86vh;
  width: auto;
  height: auto;
  box-shadow: 0 18px 50px rgba(0,0,0,.10);
}

.viewer-figure figcaption {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 20px;
  font-size: 11px;
}

.viewer-title { margin-left: auto; text-align: right; }

.viewer-close,
.viewer-nav {
  border: 0;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
}

.viewer-close {
  position: absolute;
  top: 18px;
  right: 24px;
  font-size: 34px;
  font-weight: 300;
}

.viewer-nav {
  font-size: 24px;
  align-self: stretch;
}

.viewer-prev { justify-self: stretch; }
.viewer-next { justify-self: stretch; }
.viewer-nav:hover { background: rgba(23, 23, 21, 0.04); }

@media (max-width: 1050px) {
  .cover-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 760px) {
  .site-header {
    grid-template-columns: 1fr;
    justify-items: start;
    gap: 14px;
    padding: 16px;
  }
  .collection-tabs { grid-column: 1; gap: 18px; }
  main { padding: 0 16px 56px; }
  .intro { min-height: 28vh; padding: 50px 0 28px; }
  .intro-copy { max-width: 31ch; }
  .cover-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px 14px; }
  .cover-meta { opacity: 1; transform: none; }
  .cover-grid:has(.cover-card:hover) .cover-card:not(:hover) img { opacity: 1; filter: none; }
  .viewer { grid-template-columns: 44px minmax(0, 1fr) 44px; }
  .viewer-figure img { max-width: calc(100vw - 100px); max-height: 80vh; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; }
}

/* Expanded archive: five-up on wide screens, then step down responsively. */
@media (min-width: 1380px) {
  .cover-grid { grid-template-columns: repeat(5, minmax(0, 1fr)); }
}

@media (max-width: 1000px) {
  .cover-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 700px) {
  .site-header {
    grid-template-columns: 1fr;
    justify-items: start;
    gap: 14px;
  }
  .collection-tabs { grid-column: 1; }
  main { padding-left: 18px; padding-right: 18px; }
  .cover-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .intro { min-height: 30vh; padding-top: 48px; }
  .viewer { grid-template-columns: 48px minmax(0, 1fr) 48px; }
  .viewer-figure img { max-width: 76vw; max-height: 80vh; }
}

@media (min-width: 1001px) {
  .cover-grid.collection-romans-durs {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  /* Mobile: keep the grid image-only. Titles still appear in the full-screen viewer. */
  .cover-meta { display: none; }
}