/* Observatory route only. Established Retro-Scraperism tokens and local fonts.
   Layout (B31): one 1200px instrument column, sticky selection bar, open charts and
   tallies, folded listings, whole-collection coverage on a mist band. */
.observatory { --obs-rule: #acb6c0; --obs-hair: #d7dfe6; }
* { box-sizing: border-box; }
html { scroll-padding-top: 88px; }
body { margin: 0; background: var(--rs-paper, #fff); color: var(--rs-ink, #111820); font: 14px/1.65 var(--rs-mono, monospace); font-variant-ligatures: none; -webkit-font-smoothing: antialiased; }
[hidden] { display: none !important; }
a { color: inherit; text-underline-offset: 4px; text-decoration-thickness: 1px; }
a:hover { color: var(--rs-scarlet, #b62420); }
button, select, input { font: inherit; color: inherit; }
button, select { cursor: pointer; min-height: 44px; border: 1px solid var(--rs-blueprint, #0b2546); border-radius: 0; background: var(--rs-paper, #fff); padding: 8px 12px; max-width: 100%; }
button:hover, select:hover { background: var(--rs-mist, #f0f5f8); }
button:disabled { color: var(--rs-muted, #465665); border-color: var(--obs-rule); background: var(--rs-paper, #fff); cursor: default; }
:focus-visible { outline: 3px solid var(--rs-scarlet, #b62420); outline-offset: 3px; }
img { display: block; max-width: 100%; }
h1, h2, h3, h4, p, figure, dl, dd, ol, ul { margin: 0; }
ul, ol { padding: 0; list-style: none; }
h1, h2, h3, h4 { font-family: var(--rs-display, Georgia, serif); font-weight:var(--rs-display-weight, 400); font-variation-settings:var(--rs-display-axes, normal); font-optical-sizing: auto; text-wrap: balance; }
h1 { font-size: clamp(48px, 8vw, 104px); line-height: .98; letter-spacing: -.035em; }
h2 { font-size: clamp(28px, 3.4vw, 40px); line-height: 1.16; letter-spacing: -.02em; }
h3 { font-size: 25px; line-height: 1.2; }
summary { cursor: pointer; }
.obs-shell { width: min(1200px, 100%); margin-inline: auto; padding-inline: 48px; }
.obs-muted { color: var(--rs-muted, #465665); }
.obs-label { display: inline-block; background: var(--rs-scarlet, #b62420); color: var(--rs-mist, #f0f5f8); font: 500 12px/1.5 var(--rs-mono, monospace); letter-spacing: .06em; text-transform: uppercase; padding: 4px 10px; }
.obs-empty { padding: 16px 0; border-top: 1px solid var(--obs-rule); color: var(--rs-muted, #465665); font-size: 13px; }
.visually-hidden, .skip-link:not(:focus) { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.skip-link:focus { display: block; position: relative; padding: 16px 24px; background: var(--rs-paper, #fff); z-index: 10; }
noscript p { margin-block: 8px 0; font-size: 12px; color: var(--rs-muted, #465665); }

/* Header and selection bar */
.obs-header { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 8px 32px; padding-block: 20px; }
.obs-brand { font: var(--rs-wordmark-weight, 400) 28px/1.1 var(--rs-display, Georgia, serif); font-variation-settings:var(--rs-display-axes, normal); text-decoration: none; letter-spacing: -.02em; }
.obs-brand span { color: var(--rs-scarlet, #b62420); }
/* Same links and spacing as the ledger's .header-links. */
.obs-nav { display: flex; flex-wrap: wrap; gap: 4px 24px; font-size: 14px; }
.obs-nav [aria-current='page'] { text-decoration: none; box-shadow: inset 0 -2px 0 var(--rs-scarlet, #b62420); }
.obs-nav a, .obs-jump a { display: inline-flex; align-items: center; }
#observatory-filters { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 5; background: var(--rs-paper, #fff); }
.obs-filters-row { display: flex; flex-wrap: wrap; gap: 8px 12px; align-items: center; padding-block: 10px; }
.obs-filters-row select { width: 16rem; }
.obs-jump { margin-left: auto; display: flex; flex-wrap: wrap; gap: 0 20px; font-size: 12px; }

.obs-jump a { font-weight: 650; color:var(--rs-scarlet, #b62420); text-decoration-thickness:2px}
.obs-jump a:hover { background-color:var(--rs-scarlet, #b62420); color:white}

/* Opening, metrics and whole-collection finding */
.obs-hero { padding-block: 48px 40px; }
.obs-hero-copy { min-width: 0; }
.obs-metrics { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); margin-top: 64px; margin-bottom:88px}
.obs-metric { background-position: 88% 0; background-repeat: no-repeat; display: grid; gap: 8px; align-content: start; padding: 16px 24px 20px 0; min-width: 0; }
.obs-metric + .obs-metric { padding-left: 24px; border-left: 1px solid var(--obs-rule); }
.obs-metric dt > span, .obs-metric dd > span:not(.obs-ratio) { background: var(--rs-paper, #fff); }
.obs-metric dt { font-size: 12px; color: var(--rs-muted, #465665); }
.obs-metric [data-metric] { font-size: clamp(26px, 3vw, 34px); line-height: 1.15; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.obs-of { font-size: 13px; color: var(--rs-muted, #465665); font-variant-numeric: tabular-nums; }
.obs-ratio { display: block; height: 4px; margin-top: 8px; background: var(--rs-mist, #f0f5f8); }
.obs-ratio i { display: block; height: 100%; background: var(--rs-blueprint, #0b2546); }
.obs-finding { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr); gap: 24px 48px; align-items: center; margin-top: 40px; padding: 28px 32px 32px; background: var(--rs-mist, #f0f5f8); }
#obs-finding-text { font:var(--rs-display-weight, 400) clamp(22px, 2.6vw, 30px)/1.22 var(--rs-display, Georgia, serif); font-variation-settings:var(--rs-display-axes, normal); text-wrap: balance; }
.obs-strip { position: relative; display: flex; height: 28px; background: var(--rs-paper, #fff); box-shadow: inset 0 0 0 1px var(--obs-rule); }
.obs-strip-segment { display: block; flex: none; height: 100%; background: var(--rs-blueprint, #0b2546); box-shadow: inset -1px 0 0 var(--rs-paper, #fff); }
.obs-strip-tail { background: transparent; box-shadow: none; }
.obs-strip-segment:focus-visible { outline: 2px solid var(--rs-scarlet, #b62420); outline-offset: 2px; }
.obs-strip-tooltip { display: none; position: absolute; z-index: 2; left: 0; bottom: calc(100% + 6px); max-width: 100%; padding: 4px 8px; background: var(--rs-paper, #fff); color: var(--rs-blueprint, #0b2546); border: 1px solid currentColor; font-size: 12px; font-style: normal; overflow-wrap: anywhere; }
.obs-strip-segment:hover .obs-strip-tooltip, .obs-strip-segment:focus .obs-strip-tooltip { display: block; }
.obs-strip-key { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 4px 16px; margin-top: 8px; font-size: 12px; font-variant-numeric: tabular-nums; }

/* Sections */
.obs-section { margin-top: 96px; }
.obs-section > h2 { margin-bottom: 24px; }
.obs-lede { max-width: 72ch; margin: -12px 0 24px; color: var(--rs-muted, #465665); font-size: 13px; }
.obs-disclosure > summary { list-style: none; display: flex; flex-wrap: wrap; gap: 4px 16px; align-items: center; min-height: 48px; font-size: 14px; }
.obs-disclosure > summary::-webkit-details-marker { display: none; }
.obs-disclosure > summary::before { content: '►►►'; content: '►►►' / ''; display: inline-block; width: 1.2em; transition: transform 160ms; }
.obs-disclosure[open] > summary::before { transform: rotate(90deg); }
.obs-disclosure > summary .obs-muted { font-size: 12px; }

/* Shared names: shape-only unit tally, folded comparison plates */
.obs-tally { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 16px 48px; align-items: center; padding: 24px; background: var(--rs-mist, #f0f5f8); }
.obs-tally-marks { display: flex; flex-wrap: wrap; gap: 12px; min-width: 0; }
.obs-tally-break { flex-basis: 100%; height: 0; }
.obs-cluster { display: inline-flex; gap: 4px; padding: 4px; text-decoration: none; }
.obs-cluster:hover .obs-mark { transform: translateY(-2px); }
.obs-mark { display: block; width: 20px; height: 20px; background: var(--rs-blueprint, #0b2546); transition: transform 160ms; }
.obs-mark-identical { clip-path: inset(2px); }
.obs-mark-variants { clip-path: circle(46%); }
.obs-tally-legend { display: grid; gap: 8px; font-size: 12px; }
.obs-tally-legend li { display: grid; grid-template-columns: 20px minmax(0, 1fr) 3ch; gap: 12px; align-items: center; }
.obs-tally-legend .obs-mark { width: 14px; height: 14px; justify-self: center; }
.obs-tally-legend b { font-weight: 500; text-align: right; font-variant-numeric: tabular-nums; }
.obs-tally-legend .obs-zero { color: var(--rs-muted, #465665); }
#name-groups { margin-top: 24px; }
#name-group-bands { padding-bottom: 16px; }
.obs-name-band { margin-top: 32px; }
.shared-name-group { margin-top: 24px; border-top: 1px solid var(--rs-ink, #111820); }
.obs-plate-head { display: grid; grid-template-columns: minmax(0, 1fr); text-align: center; gap: 8px 24px; align-items: baseline; padding-block: 20px 16px; }
.obs-plate-head h4 { font-size: clamp(26px, 3.2vw, 36px); line-height: 1.15; letter-spacing: -.02em; overflow-wrap: anywhere; }
.obs-name-sep { color: var(--rs-muted, #465665); padding-inline: .3em; }
.obs-plate-meta { font-size: 12px; color: var(--rs-muted, #465665); }
.obs-plate-meta strong { color: var(--rs-ink, #111820); font-weight: 500; }
.obs-tag { display: inline-block; border: 1px solid var(--rs-blueprint, #0b2546); color: var(--rs-ink, #111820); font-size: 11px; line-height: 1.4; padding: 0 6px; }
.name-diff { text-decoration: underline 2px var(--rs-scarlet, #b62420); text-underline-offset: .18em; }
.name-gap { text-decoration-skip-ink: none; white-space: pre; }
.name-nogap { display: inline-block; width: 2px; height: .9em; margin-inline: 1px; background: var(--rs-scarlet, #b62420); vertical-align: -.08em; }
.obs-plate-projects { display: grid; grid-template-columns: repeat(var(--n, 2), minmax(0, 1fr)); grid-template-rows: repeat(2, auto); }
.obs-plate-project { grid-row: span 2; display: grid; grid-template-rows: subgrid; row-gap: 12px; padding: 16px 32px 24px 0; min-width: 0; }
.obs-plate-project + .obs-plate-project { padding-left: 32px; border-left: 1px solid var(--obs-rule); }
.obs-plate-name { text-align: center; font-size: 16px; font-weight: 450; overflow-wrap: anywhere; }
.obs-repo { font-size: 13px; overflow-wrap: anywhere; align-self: start; }
.obs-repo-path { color: var(--rs-muted, #465665); }
.obs-repo-owner { font-weight: 650; }
.obs-plate-desc { font-size: 14px; line-height: 1.6; max-width: 52ch; }
.obs-plate-facts { display: grid; grid-template-columns: max-content minmax(0, 1fr); gap: 4px 16px; align-content: start; padding-top: 12px; border-top: 1px solid var(--rs-mist, #f0f5f8); font-size: 13px; }
.obs-plate-facts dt { color: var(--rs-muted, #465665); font-size: 12px; line-height: 1.75; }
.obs-plate-facts dd { font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.obs-unknown { color: var(--rs-muted, #465665); }
.obs-record { font-size: inherit; }
.obs-method { margin-top: 16px; }
.obs-method ol { list-style: decimal; display: grid; gap: 8px; padding: 0 0 20px 24px; max-width: 76ch; font-size: 13px; }
.obs-method p { padding-bottom: 20px; max-width: 76ch; font-size: 12px; color: var(--rs-muted, #465665); }

/* Charts: bar lists drawn from zero on one linear scale (05 and 06 share one). */
.obs-chart-pair { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 64px; }
.obs-chart-pair + .obs-chart, .obs-chart-wide + .obs-chart, .obs-chart-wide + .obs-chart-pair { margin-top: 96px; }
.obs-chart { min-width: 0; padding-top: 20px; border-top: 2px solid var(--rs-blueprint, #0b2546); }
.obs-chart-note { margin-top: 8px; max-width: 60ch; color: var(--rs-muted, #465665); font-size: 12px; }
.obs-bars { margin-top: 20px; }
.obs-scale, .obs-bar { display: grid; grid-template-columns: minmax(0, 13rem) minmax(0, 1fr) 7ch; gap: 12px; align-items: center; }
.obs-chart-wide .obs-scale, .obs-chart-wide .obs-bar { grid-template-columns: minmax(0, 20rem) minmax(0, 1fr) 9ch; }
.obs-scale { padding-bottom: 4px; font-size: 11px; color: var(--rs-muted, #465665); }
.obs-scale-ends { display: flex; justify-content: space-between; gap: 8px; }
.obs-bar-list { display: grid; gap: 2px; }
.obs-bar { min-height: 28px; font-size: 13px; }
.obs-bar-label { overflow-wrap: anywhere; line-height: 1.35; }
.obs-track { display: block; height: 14px; background: linear-gradient(90deg, var(--obs-rule) 1px, transparent 1px) 0 0 / 25% 100%, linear-gradient(90deg, transparent calc(100% - 1px), var(--obs-rule) 0); }
.obs-fill { display: block; height: 100%; background: var(--rs-blueprint, #0b2546); }
.obs-bar-count { text-align: right; font-variant-numeric: tabular-nums; }
.obs-bar-unknown .obs-bar-label { color: var(--rs-muted, #465665); }
.obs-bar-unknown .obs-fill { background: repeating-linear-gradient(45deg, var(--rs-blueprint, #0b2546) 0 2px, var(--rs-paper, #fff) 2px 6px); box-shadow: inset 0 0 0 1px var(--rs-blueprint, #0b2546); }
.obs-chart-data { margin-top: 16px; border-top: 1px solid var(--rs-mist, #f0f5f8); }
.obs-chart-data summary { display: flex; align-items: center; min-height: 44px; font-size: 12px; color: var(--rs-muted, #465665); }
.chart-table { width: 100%; margin-bottom: 16px; border-collapse: collapse; font-size: 12px; font-variant-numeric: tabular-nums; }
.chart-table caption { text-align: left; padding-bottom: 4px; font-size: 12px; color: var(--rs-muted, #465665); }
.chart-table th, .chart-table td { padding: 6px 12px 6px 0; border-top: 1px solid var(--rs-mist, #f0f5f8); font-weight: 400; text-align: left; overflow-wrap: anywhere; }
.chart-table thead th { color: var(--rs-muted, #465665); }
.chart-table th:last-child, .chart-table td { text-align: right; white-space: nowrap; }

/* Reviewed rhymes remain separate from shared-name accounting. */
#rhyme-groups { margin-top: 0; border-top: 1px solid var(--obs-rule); }
#rhyme-groups > summary { padding-block: 0; }
#rhyme-groups > p { margin-block: 16px; font-size: 13px; max-width: 80ch; }
#rhyme-count { font-variant-numeric: tabular-nums; }
#rhyme-group-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr)); gap: 24px 48px; padding-block: 16px 24px; }
.obs-rhyme-group { min-width: 0; }
.obs-rhyme-group h3 { margin-bottom: 8px; }
.obs-rhyme-projects { margin-top: 16px; }
.obs-rhyme-projects li { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 16px; }
.obs-rhyme-projects a { display: inline-flex; align-items: center; min-height: 44px; overflow-wrap: anywhere; }
.obs-rhyme-projects span { font-size: 12px; overflow-wrap: anywhere; }

/* Whole-collection evidence coverage */
.obs-coverage { margin-top: 96px; padding-block: 64px; background: var(--rs-mist, #f0f5f8); }
.obs-coverage h2 { margin-bottom: 16px; }
.obs-coverage-table { width: 100%; margin-top: 32px; border-collapse: collapse; font-size: 13px; }
.obs-coverage-table thead th { padding: 0 24px 8px 0; color: var(--rs-muted, #465665); font-size: 12px; font-weight: 400; text-align: left; }
.obs-coverage-table tbody th, .obs-coverage-table tbody td { padding: 14px 24px 14px 0; border-top: 1px solid var(--obs-rule); font-weight: 400; text-align: left; vertical-align: top; }
.obs-coverage-table tbody th { width: 15rem; }
.obs-coverage-table tbody td:last-child { color: var(--rs-muted, #465665); font-size: 12px; }
.obs-cov-count { display: grid; grid-template-columns: minmax(8rem, 14rem) 10ch; gap: 24px; align-items: start; white-space: nowrap; font-variant-numeric: tabular-nums; }
.obs-cov-count .obs-track { margin-top: 5px; background-color: var(--rs-paper, #fff); }
.obs-cov-count > span:last-child { text-align: right; }
.obs-coverage-notes { display: grid; gap: 8px; margin-top: 24px; font-size: 12px; color: var(--rs-muted, #465665); }

/* Project data */
.obs-ledger > p:not(.obs-downloads) { color: var(--rs-muted, #465665); font-size: 13px; }
.obs-downloads { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.obs-downloads a { display: inline-flex; align-items: center; min-height: 44px; padding: 8px 14px; border: 1px solid var(--rs-blueprint, #0b2546); font-size: 13px; text-decoration: none; }
.obs-downloads a:hover { background: var(--rs-mist, #f0f5f8); color: var(--rs-ink, #111820); }

/* Closing mark and footer */
.obs-closing-mark { display: flex; justify-content: center; padding: 128px 24px; }
.obs-logo { display: block; width: 128px; max-width: 100%; height: auto; }
.obs-footer { background: var(--rs-blueprint, #0b2546); color: var(--rs-trace, #d9eef8); font-size: 12px;background-image: url(../patterns/navypattern2.png); background-repeat: repeat;border-top: 3px double white; }
.obs-footer .obs-shell { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-end; gap: 16px 32px; padding-block: 32px; }
.obs-footer-links { display: grid; gap: 4px; text-align: right; }
.obs-footer a { color: var(--rs-paper, #fff); }
.obs-footer a:hover { color: var(--rs-amber, #ffc800); }
.obs-footer :focus-visible { outline-color: var(--rs-amber, #ffc800); }

@media (max-width: 960px) {
  .obs-shell { padding-inline: 24px; }
  .obs-finding, .obs-tally { grid-template-columns: minmax(0, 1fr); align-items: start; }
  .obs-metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .obs-metric:nth-child(3) { padding-left: 0; border-left: 0; }
  .obs-metric:nth-child(n+3) { border-top: 1px solid var(--obs-rule); }
  .obs-chart-pair { grid-template-columns: minmax(0, 1fr); gap: 56px; }
  .obs-jump { margin-left: 0; }
  .obs-coverage-table thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0, 0, 0, 0); }
  .obs-coverage-table tbody tr { display: grid; grid-template-columns: minmax(0, 1fr); padding-block: 14px; border-top: 1px solid var(--obs-rule); }
  .obs-coverage-table tbody th, .obs-coverage-table tbody td { width: auto; padding: 0 0 6px; border-top: 0; }
  .obs-cov-count { grid-template-columns: minmax(0, 1fr) 10ch; }
}
@media (max-width: 640px) {
  .obs-shell { padding-inline: 16px; }
  .obs-hero { padding-block: 32px; }
  .obs-filters-row select { width: calc(50% - 6px); }
  .obs-filters-row button { flex: 1 1 100%; }
  .obs-jump { display: none; }
  .obs-metric, .obs-metric + .obs-metric { padding: 14px 12px 16px 0; }
  .obs-metric:nth-child(even) { padding-left: 12px; }
  .obs-finding { padding: 20px; }
  .obs-section, .obs-coverage { margin-top: 64px; }
  .obs-coverage { padding-block: 40px; }
  .obs-scale, .obs-bar, .obs-chart-wide .obs-scale, .obs-chart-wide .obs-bar { grid-template-columns: minmax(0, 1fr) 8ch; gap: 4px 12px; }
  .obs-bar-label { grid-column: 1 / -1; }
  .obs-scale > span:first-child { display: none; }
  .obs-bar { padding-block: 4px; }
  .obs-chart-pair + .obs-chart, .obs-chart-wide + .obs-chart, .obs-chart-wide + .obs-chart-pair { margin-top: 64px; }
  .obs-plate-projects { grid-template-columns: minmax(0, 1fr); grid-template-rows: none; }
  .obs-plate-project { grid-row: auto; grid-template-rows: none; padding: 16px 0 24px; }
  .obs-plate-project + .obs-plate-project { padding-left: 0; border-left: 0; border-top: 1px solid var(--obs-rule); }
  .obs-closing-mark { padding-block: 96px; }
  .obs-footer-links { text-align: left; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .obs-mark, .obs-disclosure > summary::before { transition: none; }
  .obs-cluster:hover .obs-mark { transform: none; }
}
@media print {
  body { font-size: 10px; }
  .obs-shell { width: 100%; padding-inline: 0; }
  #observatory-filters, #project-records, .obs-nav { display: none; }
  .obs-chart, .shared-name-group { break-inside: avoid; }
  .obs-chart-pair { display: block; }
  .obs-chart-pair > .obs-chart + .obs-chart { margin-top: 24px; }
  .obs-coverage { background: #fff; }
  .obs-footer { background: #fff; color: #111820; border-top: 1px solid #111820; }
  .obs-footer a { color: #111820; }
}

/* Pair artwork sits at the outside edges without cropping the specimen. */
.obs-plate-intro { display: flex; align-items: flex-start; gap: 16px; min-width: 0; }
.obs-plate-copy { flex: 1; min-width: 0; display: grid; gap: 12px; }
.obs-pair-art { flex: 0 0 auto; width: clamp(72px, 9vw, 128px); height: 144px; object-fit: contain; }
.obs-plate-project:nth-child(even) .obs-pair-art { order: 1; }
@media (max-width: 600px) {
  .obs-pair-art { width: 80px; height: 112px; }
}