/* Variant 2: Tea Pest Monograph & Archival Folio (Light Paper Default) */
:root,
html[data-theme="light"] {
  --bg: #F3EFE6;
  --bg-elevated: #FAF8F2;
  --surface-plate: #EAE3D5;
  --text: #181613;
  --muted: #5C574E;
  --accent: #1B5E3C;
  --accent-soft: rgba(27, 94, 60, 0.1);
  --seal: #B23224;
  --seal-soft: rgba(178, 50, 36, 0.08);
  --border: rgba(24, 22, 19, 0.15);
  --rule-strong: #181613;
  --shadow: 0 18px 40px -24px rgba(24, 22, 19, 0.22);
  color-scheme: light;
}

html[data-theme="dark"] {
  --bg: #13110E;
  --bg-elevated: #1B1814;
  --surface-plate: #221E18;
  --text: #EFE9DD;
  --muted: #A9A091;
  --accent: #52B788;
  --accent-soft: rgba(82, 183, 136, 0.14);
  --seal: #E05A47;
  --seal-soft: rgba(224, 90, 71, 0.14);
  --border: rgba(239, 233, 221, 0.15);
  --rule-strong: #DDD5C5;
  --shadow: 0 22px 46px -22px rgba(4, 3, 2, 0.65);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html, body { scroll-behavior: smooth; overflow-x: clip; max-width: 100%; }
body {
  margin: 0;
  font-family: "PingFang SC", "Noto Sans SC", "Hiragino Sans GB", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.68;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; cursor: pointer; background: none; border: none; }
img { max-width: 100%; display: block; }

.serif-editorial { font-family: "Songti SC", "Noto Serif SC", "STSong", Georgia, serif; }
.mono-num { font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; font-variant-numeric: tabular-nums; }
.container { width: min(1240px, calc(100% - 40px)); margin: 0 auto; }

.paper-grain {
  position: fixed;
  inset: 0;
  z-index: 90;
  pointer-events: none;
  opacity: 0.032;
  background-image: radial-gradient(rgba(24, 22, 19, 0.6) 0.5px, transparent 0.5px);
  background-size: 6px 6px;
}

/* Header Masthead */
.ed-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.ed-header-inner {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.ed-brand { display: flex; align-items: center; gap: 12px; min-width: 0; }
.ed-seal-stamp {
  width: 34px;
  height: 34px;
  border: 1.5px solid var(--seal);
  color: var(--seal);
  display: grid;
  place-items: center;
  font-size: 13px;
  font-weight: 800;
  flex-shrink: 0;
}

.ed-nav { display: flex; align-items: center; gap: 22px; font-size: 13.5px; color: var(--muted); }
.ed-nav a:hover { color: var(--text); }

.ed-actions { display: flex; align-items: center; gap: 10px; }

.theme-toggle-btn {
  width: 38px;
  height: 38px;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  display: grid;
  place-items: center;
  color: var(--text);
}
.theme-toggle-btn:hover { border-color: var(--rule-strong); }
html[data-theme="light"] .theme-icon-light { display: none; }
html[data-theme="dark"] .theme-icon-dark { display: none; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 40px;
  padding: 0 18px;
  font-size: 13.5px;
  font-weight: 700;
  border: 1px solid transparent;
  transition: transform 0.18s ease, background-color 0.18s ease, border-color 0.18s ease;
}
.btn-ink { background: var(--text); color: var(--bg); border-color: var(--text); }
.btn-ink:hover { background: var(--accent); border-color: var(--accent); color: var(--bg); }
.btn-ruled { background: var(--bg-elevated); border-color: var(--rule-strong); color: var(--text); }
.btn-ruled:hover { background: var(--surface-plate); }
.btn-sm { min-height: 34px; padding: 0 13px; font-size: 12.5px; }

/* Archival Banner & Editorial Hero */
.ed-hero { padding: 28px 0 48px; }
.ed-ledger-bar {
  border-top: 2px solid var(--rule-strong);
  border-bottom: 1px solid var(--rule-strong);
  padding: 10px 0;
  display: grid;
  grid-template-columns: 1.4fr repeat(4, minmax(0, 1fr));
  gap: 12px;
  align-items: center;
}
.ed-ledger-edition { font-size: 11.5px; letter-spacing: 0.08em; color: var(--muted); }
.ed-ledger-stat {
  border-left: 1px solid var(--border);
  padding-left: 14px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
}
.ed-ledger-stat span { font-size: 12px; color: var(--muted); }
.ed-ledger-stat strong { font-size: 18px; font-weight: 800; color: var(--text); }

.ed-masthead {
  text-align: center;
  max-width: 820px;
  margin: 38px auto 34px;
}
.ed-kicker {
  display: inline-block;
  padding: 3px 12px;
  border: 1px solid var(--seal);
  color: var(--seal);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.1em;
  margin-bottom: 14px;
}
.ed-title {
  margin: 0 0 14px;
  font-size: clamp(36px, 4.8vw, 62px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  font-weight: 800;
}
.ed-lead {
  margin: 0 auto 24px;
  max-width: 660px;
  font-size: 15.5px;
  color: var(--muted);
}
.ed-cta-row { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; }

/* Triptych Specimen Folio Spread */
.folio-triptych {
  display: grid;
  grid-template-columns: 240px minmax(0, 1.35fr) 310px;
  border: 1px solid var(--rule-strong);
  background: var(--bg-elevated);
  box-shadow: var(--shadow);
}

.folio-index-col {
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.folio-index-col [role="tablist"] {
  display: flex;
  flex-direction: column;
  width: 100%;
}
.folio-index-head {
  padding: 12px 16px;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
  background: var(--surface-plate);
}
.folio-tab-btn {
  width: 100%;
  text-align: left;
  padding: 16px;
  border-bottom: 1px solid var(--border);
  border-left: 3px solid transparent;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: background-color 0.18s ease, border-color 0.18s ease;
}
.folio-tab-btn:last-child { border-bottom: none; }
.folio-tab-btn:hover { background: var(--surface-plate); }
.folio-tab-btn.active {
  background: var(--seal-soft);
  border-left-color: var(--seal);
}
.folio-tab-num { font-size: 11px; color: var(--seal); font-weight: 700; }
.folio-tab-btn strong { font-size: 14.5px; }
.folio-tab-btn small { font-size: 12px; color: var(--muted); line-height: 1.45; }

.folio-plate-stage {
  padding: 20px;
  background: var(--surface-plate);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 12px;
}
.folio-mat-frame {
  position: relative;
  border: 1px solid var(--rule-strong);
  background: var(--bg-elevated);
  padding: 10px;
}
.folio-mat-frame img {
  width: 100%;
  aspect-ratio: 16 / 11;
  object-fit: cover;
  display: block;
  border: 1px solid var(--border);
}
.folio-stamp-chip {
  position: absolute;
  top: 20px;
  right: 20px;
  background: rgba(24, 22, 19, 0.84);
  color: #F6F2E9;
  padding: 4px 10px;
  font-size: 11px;
  border: 1px solid rgba(246, 242, 233, 0.25);
}
.folio-plate-caption {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  color: var(--muted);
  border-top: 1px solid var(--border);
  padding-top: 10px;
}

.folio-detail-col {
  border-left: 1px solid var(--border);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.folio-latin { font-size: 12px; font-style: italic; color: var(--muted); }
.folio-rx-box {
  padding: 12px;
  background: var(--accent-soft);
  border-left: 3px solid var(--accent);
  font-size: 13px;
  line-height: 1.55;
}
.folio-notes-stack { display: flex; flex-direction: column; gap: 10px; margin-top: auto; }
.folio-note-item {
  border-top: 1px solid var(--border);
  padding-top: 10px;
}
.folio-note-top { display: flex; justify-content: space-between; gap: 8px; font-size: 12.5px; }
.folio-note-top span { color: var(--accent); font-size: 11px; font-weight: 700; }
.folio-note-item p { margin: 4px 0 0; font-size: 12px; color: var(--muted); line-height: 1.5; }

/* Sections & Editorial Grids */
.ed-section { padding: 54px 0; border-top: 1px solid var(--border); }
.ed-section-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-end;
  gap: 18px;
  margin-bottom: 24px;
}
.ed-section-title { margin: 0; font-size: clamp(24px, 3vw, 34px); line-height: 1.2; }
.ed-section-sub { margin: 6px 0 0; font-size: 14px; color: var(--muted); max-width: 640px; }

.ed-architecture-split {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 24px;
  align-items: start;
  margin-bottom: 28px;
}
.ed-prose-card {
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  padding: 22px;
}
.sync-ledger-wrap { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.sync-note-chip {
  padding: 5px 10px;
  font-size: 11.5px;
  border: 1px solid var(--border);
  background: var(--surface-plate);
  color: var(--text);
}

.region-ledger-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}
.region-tile {
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.region-head { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; }
.region-name { font-weight: 800; font-size: 15px; }
.region-level { font-size: 11px; padding: 2px 7px; border: 1px solid var(--accent); color: var(--accent); }
.region-level.high { border-color: var(--seal); color: var(--seal); background: var(--seal-soft); }

/* Specimen Monograph Catalog Grid */
.filter-bar { display: flex; flex-wrap: wrap; gap: 8px; }
.filter-tab {
  padding: 6px 14px;
  font-size: 12.5px;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
}
.filter-tab.active {
  border-color: var(--seal);
  background: var(--seal);
  color: #FAF8F2;
  font-weight: 700;
}

.specimen-catalog-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.plate-card {
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.plate-card:hover { border-color: var(--rule-strong); }
.plate-thumb-wrap {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--surface-plate);
}
.plate-thumb { width: 100%; height: 100%; object-fit: cover; transition: transform 0.35s ease; }
.plate-card:hover .plate-thumb { transform: scale(1.03); }
.plate-seal-tag {
  position: absolute;
  left: 8px;
  bottom: 8px;
  padding: 3px 8px;
  font-size: 10.5px;
  background: rgba(24, 22, 19, 0.85);
  color: #FAF8F2;
}
.specimen-quick-btn {
  padding: 5px 11px;
  font-size: 12px;
  border: 1px solid var(--rule-strong);
  font-weight: 700;
}
.specimen-quick-btn:hover { background: var(--text); color: var(--bg); }

/* Access Diptych & Team */
.access-diptych {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}
.access-folio-box {
  border: 1px solid var(--rule-strong);
  background: var(--bg-elevated);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 16px;
}
.team-editorial-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}
.editorial-roster-item {
  border-top: 2px solid var(--rule-strong);
  border-bottom: 1px solid var(--border);
  background: var(--bg-elevated);
  padding: 16px;
}

.ed-footer {
  border-top: 2px solid var(--rule-strong);
  padding: 24px 0 40px;
  font-size: 12.5px;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
}

/* Specimen Modal */
dialog.specimen-dialog {
  width: min(760px, calc(100% - 28px));
  border: 1px solid var(--rule-strong);
  background: var(--bg-elevated);
  color: var(--text);
  padding: 22px;
  box-shadow: var(--shadow);
}
dialog.specimen-dialog::backdrop { background: rgba(16, 14, 11, 0.65); }
.modal-head-row { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 14px; }
.modal-specimen-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 18px; align-items: start; }
.modal-img-frame { border: 1px solid var(--border); background: var(--surface-plate); }
.modal-img-frame img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.modal-fact-row { font-size: 13px; border-bottom: 1px solid var(--border); padding: 6px 0; }

/* Responsive Floor */
@media (max-width: 1040px) {
  .ed-ledger-bar { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .ed-ledger-edition { grid-column: 1 / -1; }
  .folio-triptych { grid-template-columns: 1fr; }
  .folio-index-col { border-right: none; border-bottom: 1px solid var(--border); }
  .folio-detail-col { border-left: none; border-top: 1px solid var(--border); }
  .region-ledger-grid, .specimen-catalog-grid, .team-editorial-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .ed-architecture-split, .access-diptych { grid-template-columns: 1fr; }
}
@media (max-width: 680px) {
  .container { width: calc(100% - 24px); }
  .ed-header-inner { gap: 8px; min-height: 58px; }
  .ed-brand > div { min-width: 0; }
  .ed-brand-sub, .ed-nav { display: none; }
  .ed-header .btn-sm { padding: 0 10px; font-size: 11.5px; white-space: nowrap; }
  .ed-kicker, .ed-ledger-edition { max-width: 100%; overflow-wrap: anywhere; white-space: normal; }
  .ed-title { font-size: clamp(27px, 7.6vw, 38px); }
  .ed-ledger-bar, .region-ledger-grid, .specimen-catalog-grid, .team-editorial-grid, .modal-specimen-grid { grid-template-columns: minmax(0, 1fr); }
  .ed-ledger-stat { border-left: none; border-top: 1px solid var(--border); padding: 8px 0 0; }
}