:root { --slate: #35424a; --deep: #202e36; --accent: #e8491d; --link: #a33314; --ink: #202e36; --muted: #58646b; --ground: #f4f4f4; --rule: #d5dce0; }
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body { margin: 0; color: var(--ink); background: white; font-family: Arial, Helvetica, sans-serif; font-size: 1rem; line-height: 1.65; }
[hidden] { display: none !important; }
a { color: var(--link); text-underline-offset: 3px; overflow-wrap: anywhere; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible, input:focus-visible, select:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid #b15b06; outline-offset: 4px; }
.container { width: min(1240px, calc(100% - 48px)); margin-inline: auto; }
.site-header { background: var(--deep); color: white; border-bottom: 1px solid #4c5b63; }
.navigation, .nav-links, .footer-content, .section-heading, .register-status { display: flex; align-items: center; flex-wrap: wrap; }
.navigation { min-height: 88px; gap: 24px; justify-content: space-between; }
.brand { color: white; text-decoration: none; font-size: 1.6rem; font-weight: 800; letter-spacing: 0.04em; }
.brand span { display: block; font-size: 0.75rem; letter-spacing: 0.12em; font-weight: 400; line-height: 1.2; }
.nav-links { gap: 28px; font-size: 0.9375rem; }
.nav-links a { color: #e8edf0; text-decoration: none; }
.nav-links a:hover { text-decoration: underline; }
.skip-link { position: absolute; left: 20px; top: -100px; background: white; padding: 12px; z-index: 10; }
.skip-link:focus { top: 10px; }
.intro { background: var(--slate); color: white; border-bottom: 4px solid var(--accent); padding-block: 42px 28px; }
.eyebrow { margin: 0 0 10px; color: var(--link); font-size: 0.8125rem; font-weight: 700; letter-spacing: 0.09em; text-transform: uppercase; }
.intro .eyebrow { color: #ffb093; }
h1, h2, h3, h4 { line-height: 1.2; }
h1 { margin: 0 0 12px; font-size: clamp(2.5rem, 4.3vw, 3.5rem); letter-spacing: -0.025em; }
h2 { margin: 0 0 14px; font-size: clamp(1.8rem, 2.6vw, 2.4rem); letter-spacing: -0.02em; }
h3 { margin: 0; font-size: 1.2rem; }
h4 { margin: 22px 0 10px; font-size: 1rem; }
p { margin: 0 0 18px; }
.lede { margin-bottom: 12px; font-size: 1.3rem; max-width: 840px; }
.intro-note { max-width: 850px; color: #e2e8eb; }
.statistics { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 28px; margin: 26px 0 18px; padding-top: 20px; border-top: 1px solid #6c777e; }
.statistics > div { display: flex; flex-direction: column-reverse; }
.statistics dt { color: #dce4e8; font-size: 0.875rem; }
.statistics dd { margin: 0; font-size: 2rem; font-weight: 700; line-height: 1.4; }
.review-note { font-size: 0.875rem; color: #dce4e8; margin: 0; max-width: 950px; }
.section { padding-block: 56px; }
.register-section { padding-block: 42px 56px; }
.histograms-section { border-bottom: 1px solid var(--rule); }
.histogram-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; align-items: start; }
.histogram-card { min-width: 0; border: 1px solid var(--rule); border-radius: 3px; padding: 24px; }
.histogram-length { grid-column: 1 / -1; }
.histogram-controls { margin-top: 16px; }
.histogram-controls label, .histogram-global-controls label { display: block; font-size: 0.875rem; font-weight: 700; }
.histogram-controls select, .histogram-global-controls select { display: block; width: 100%; max-width: 360px; margin-top: 6px; padding: 10px; min-height: 44px; border: 1px solid #89959c; border-radius: 3px; background: white; color: var(--ink); font: inherit; font-size: 1rem; }
.histogram-global-controls { display: flex; flex-wrap: wrap; align-items: end; gap: 20px 32px; padding: 20px; margin-bottom: 24px; background: var(--ground); border: 1px solid var(--rule); }
.histogram-global-controls p { max-width: 570px; margin: 0; color: var(--muted); font-size: 0.875rem; }
.histogram-coverage { margin: 14px 0 6px; color: var(--muted); font-size: 0.875rem; }
.histogram-plot svg { display: block; width: 100%; height: 330px; overflow: visible; }
.histogram-plot text { fill: var(--ink); font-family: inherit; font-size: 13px; }
.histogram-gridline { stroke: #d5dce0; stroke-width: 1; }
.histogram-bin { cursor: pointer; }
.histogram-bin rect { fill: #ad3c17; }
.histogram-strength .histogram-bin rect { fill: #355e73; }
.histogram-length .histogram-bin rect { fill: #526c5b; }
.histogram-bin:hover rect, .histogram-bin:focus rect, .histogram-bin.selected rect { stroke: var(--ink); stroke-width: 2; }
.histogram-bin:focus { outline: 2px solid #b76518; outline-offset: 3px; }
.histogram-count { font-weight: 700; }
.histogram-note, .histogram-method, .histogram-selection { color: var(--muted); font-size: 0.875rem; }
.histogram-note { margin: 12px 0 18px; }
.histogram-method { margin: 24px 0 0; max-width: 1100px; }
.histogram-empty { padding-block: 64px; text-align: center; color: var(--muted); }
.histogram-clear { padding: 8px 12px; margin-bottom: 12px; font: inherit; font-size: 0.875rem; background: white; border: 1px solid #89959c; border-radius: 3px; color: var(--link); cursor: pointer; }
.histogram-table-wrap { overflow-x: auto; max-height: 420px; }
.histogram-values table { border-collapse: collapse; width: 100%; min-width: 500px; font-size: 0.875rem; }
.histogram-values caption { text-align: left; color: var(--muted); margin-bottom: 12px; }
.histogram-values th, .histogram-values td { text-align: left; vertical-align: top; padding: 10px 8px; border-bottom: 1px solid var(--rule); }
.histogram-values td span { color: var(--muted); }
.benefits-section { background: #fafafa; border-bottom: 1px solid var(--rule); }
.benefits-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 40px; margin: 32px 0; padding: 0; list-style: none; }
.benefits-list > li { display: grid; grid-template-columns: 42px minmax(0, 1fr); gap: 18px; padding-block: 24px; border-top: 1px solid var(--rule); }
.benefit-number { color: var(--link); font-size: 1.4rem; font-weight: 700; line-height: 1.2; font-variant-numeric: tabular-nums; }
.benefits-list h3 { margin-bottom: 12px; }
.benefits-list p { color: var(--muted); margin: 0; }
.benefit-citation { display: inline-block; font-size: 0.8125rem; font-weight: 700; text-decoration: none; white-space: nowrap; }
.benefit-citation:hover { text-decoration: underline; }
.benefits-context { border-left: 3px solid var(--accent); padding: 6px 0 6px 22px; max-width: 980px; }
.benefits-context h3 { margin-bottom: 12px; }
.benefits-context p { margin: 0; }
.benefits-sources { margin-top: 28px; font-size: 0.9375rem; max-width: 1060px; }
.benefits-source-note { color: var(--muted); }
.benefits-sources ol { margin-bottom: 0; padding-left: 24px; }
.benefits-sources li { margin-bottom: 14px; padding-left: 4px; overflow-wrap: anywhere; scroll-margin-top: 24px; }
.benefits-sources li:last-child { margin-bottom: 0; }
.benefits-sources li:target { outline: 2px solid #b76518; outline-offset: 6px; }
.concerns-section { border-bottom: 1px solid var(--rule); }
.concerns-attribution { max-width: 980px; padding-left: 20px; border-left: 3px solid #647780; color: var(--muted); font-size: 0.9375rem; }
.concerns-list .watch-for { margin-top: 12px; }
.concerns-list .watch-for strong { color: var(--ink); }
.map-section { border-bottom: 1px solid var(--rule); }
.map-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.map-actions button, .map-link { display: inline-flex; align-items: center; gap: 9px; border: 1px solid #89959c; border-radius: 3px; background: white; color: var(--link); font: inherit; font-size: 0.9375rem; font-weight: 700; padding: 10px 14px; cursor: pointer; text-decoration: none; }
.map-actions button:hover, .map-link:hover { background: var(--ground); }
.map-actions button[aria-pressed="true"] { background: var(--deep); color: white; border-color: var(--deep); }
.route-swatch { width: 24px; height: 5px; flex: none; border-radius: 2px; }
.route-swatch.overland { background: #f47a20; }
.route-swatch.wharf { background: #21c7e7; }
.map-status { font-size: 0.9375rem; color: var(--muted); margin: 16px 0 12px; }
.conveyor-map { height: 520px; width: 100%; border: 1px solid var(--rule); border-radius: 3px; z-index: 0; font-family: inherit; }
.map-note { color: var(--muted); font-size: 0.875rem; margin: 12px 0 0; }
.record-map { display: flex; align-items: center; gap: 12px 18px; flex-wrap: wrap; font-size: 0.875rem; margin: 0 0 18px; }
.conveyor-map .leaflet-popup-content { line-height: 1.5; }
.conveyor-map .leaflet-control-attribution { font-size: 10px; }
.conveyor-map .leaflet-control-layers { font-size: 0.8125rem; }
.section-heading { gap: 16px 32px; justify-content: space-between; margin-bottom: 8px; }
.section-heading h2 { margin-bottom: 0; }
.download { border: 1px solid var(--rule); padding: 10px 16px; border-radius: 3px; font-size: 0.9375rem; font-weight: 700; text-decoration: none; }
.download:hover { background: var(--ground); }
.section-intro { max-width: 950px; color: var(--muted); margin: 16px 0 24px; }
.filters { display: grid; grid-template-columns: minmax(200px, 1.6fr) minmax(150px, 1fr) minmax(200px, 1.2fr) auto; align-items: end; gap: 18px; padding: 22px; background: var(--ground); border: 1px solid var(--rule); border-radius: 3px; }
.filters label { display: block; margin-bottom: 6px; font-size: 0.875rem; font-weight: 700; }
.filters input, .filters select, .filters button { font: inherit; font-size: 1rem; border: 1px solid #89959c; border-radius: 3px; min-height: 46px; }
.filters input, .filters select { width: 100%; padding: 10px; color: var(--ink); background: white; }
.filters button { cursor: pointer; padding: 10px 14px; background: white; color: var(--link); font-weight: 700; }
.filters button:hover { background: #e9edf0; }
.register-status { justify-content: space-between; gap: 16px; margin: 18px 0; font-size: 0.9375rem; }
.register-status p { margin: 0; color: var(--muted); }
.empty-state { padding: 28px; background: var(--ground); border: 1px solid var(--rule); }
.installation-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; align-items: start; }
.installation { min-width: 0; border: 1px solid var(--rule); border-top: 3px solid #647780; padding: 24px; border-radius: 3px; scroll-margin-top: 24px; overflow-wrap: anywhere; }
.installation[data-tier="A"] { border-top-color: #ad3c17; }
.record-heading { display: flex; justify-content: space-between; align-items: start; gap: 14px; }
.record-heading h3 { flex: 1; }
.record-heading h3 a { color: var(--ink); text-decoration: none; }
.record-heading h3 a:hover { text-decoration: underline; }
.tier-label { display: inline-block; flex: none; font-size: 0.875rem; font-weight: 700; line-height: 1.5; padding: 3px 7px; background: #edf1f3; color: #35424a; border-radius: 2px; }
.tier-label.tier-a { background: #fbece6; color: #913210; }
.record-location { font-size: 0.9375rem; color: var(--muted); margin: 10px 0 18px; }
.record-facts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px 22px; margin: 0 0 18px; }
.record-facts dt { color: var(--muted); font-size: 0.875rem; margin-bottom: 2px; }
.record-facts dd { margin: 0; font-size: 0.9375rem; }
.record-material { font-size: 0.9375rem; margin-bottom: 18px; }
.record-material strong { font-weight: 700; }
summary { cursor: pointer; color: var(--link); font-size: 0.9375rem; font-weight: 700; }
details[open] summary { margin-bottom: 18px; }
.evidence-detail { font-size: 0.9375rem; }
.source-citations, .record-notes, .conflict-claims { padding-left: 20px; margin: 12px 0 18px; }
.source-citations li, .record-notes li, .conflict-claims li { margin-bottom: 12px; }
.citation-locator { display: block; color: var(--muted); font-size: 0.875rem; margin-top: 4px; }
.source-detail-link { font-size: 0.875rem; margin-left: 8px; }
.record-status { border-left: 3px solid #647780; padding-left: 14px; }
.conflict { border-left: 3px solid #b76518; padding-left: 14px; margin-bottom: 20px; }
.conflict > p { margin-bottom: 8px; }
.record-id { color: var(--muted); font-size: 0.8125rem; }
.evidence-section { background: var(--ground); border-block: 1px solid var(--rule); }
.evidence-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 24px; margin: 24px 0 32px; }
.evidence-grid article { border-top: 2px solid #89959c; padding-top: 16px; }
.evidence-grid h3 { margin: 10px 0 12px; font-size: 1.0625rem; }
.evidence-grid p { font-size: 0.9375rem; margin-bottom: 0; }
.evidence-count { font-size: 0.875rem; color: var(--muted); }
.reading-notes { max-width: 980px; font-size: 0.9375rem; }
.reading-notes p:last-child { margin-bottom: 0; }
.references { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 40px; padding-left: 22px; margin-top: 30px; }
.references li { padding: 0 0 24px 4px; margin-bottom: 24px; border-bottom: 1px solid var(--rule); scroll-margin-top: 24px; min-width: 0; overflow-wrap: anywhere; }
.references li:target, .installation:target { outline: 3px solid #b76518; outline-offset: 6px; }
.references h3 { font-size: 1.0625rem; line-height: 1.4; margin-bottom: 10px; }
.reference-meta { font-size: 0.875rem; color: var(--muted); margin-bottom: 10px; }
.reference-note { font-size: 0.875rem; margin-bottom: 0; }
.calculation-section { background: var(--ground); border-top: 1px solid var(--rule); }
.calculation-section p { max-width: 920px; }
footer { background: var(--deep); color: #d4dde2; font-size: 0.875rem; }
.footer-content { gap: 16px 28px; padding-block: 24px; }
.footer-content p { margin: 0 auto 0 0; }
footer a { color: #d4dde2; }
@media (max-width: 1000px) {
  .filters { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .filters button { justify-self: start; }
  .evidence-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 720px) {
  .container { width: calc(100% - 36px); }
  .navigation { padding-block: 20px; gap: 20px; }
  .nav-links { gap: 16px 24px; }
  .intro { padding-block: 30px 24px; }
  .statistics { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
  .installation-list, .references, .benefits-list, .histogram-grid { grid-template-columns: 1fr; }
  .histogram-card { padding: 18px; }
  .benefits-list > li { grid-template-columns: 36px minmax(0, 1fr); gap: 14px; padding-block: 22px; }
  .section, .register-section { padding-block: 36px; }
  .section-heading { align-items: start; }
  .installation { padding: 20px; }
  .conveyor-map { height: 430px; }
}
@media (max-width: 480px) {
  .filters, .evidence-grid { grid-template-columns: 1fr; }
  .filters { padding: 18px; }
  .record-heading { flex-wrap: wrap; }
  .record-heading h3 { flex-basis: 100%; }
  .record-facts { gap: 12px; }
  .footer-content { flex-direction: column; align-items: start; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }