/* A document reading surface; the canonical manuscript generates the HTML. */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-padding-top: 28px; }
body { background: var(--bg-1); color: var(--fg-1); font: 400 18px/1.75 var(--font-body); }
body.figure-open { overflow: hidden; }
button, input { font: inherit; }
button, a { touch-action: manipulation; }
a { color: var(--clean); text-underline-offset: 3px; }
button { cursor: pointer; }
[hidden] { display: none !important; }
:is(a, button, [tabindex]):focus-visible { outline: 2px solid var(--clean); outline-offset: 4px; }
.wrap { width: 100%; max-width: 1320px; margin-inline: auto; padding-inline: 40px; }
.skip-link { position: fixed; left: 20px; top: 12px; transform: translateY(-200%); z-index: 100; padding: 10px 16px; background: var(--bg-2); border: 1px solid var(--clean); font-size: 15px; }
.skip-link:focus { transform: none; }
.banner { padding: 14px max(40px,calc((100% - 1240px)/2)); border-bottom: 1px solid var(--line-3); color: var(--fg-3); font-size: 13px; line-height: 1.6; }
.banner b { color: var(--fg-2); font-weight: 600; }
.brief-hero { display: grid; grid-template-columns: minmax(0,1.1fr) minmax(0,1fr); column-gap: 64px; padding-block: 40px 48px; border-bottom: 1px solid var(--line-3); }
.kicker-row { grid-column: 1 / -1; display: flex; align-items: center; gap: 24px; margin-bottom: 32px; }
.kicker-tag { color: var(--clean); font-size: 12px; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; }
.kicker-rule { height: 1px; flex: 1; background: var(--line-2); }
.eyebrow { grid-column: 1 / -1; margin-bottom: 18px; color: var(--fg-3); font-size: 14px; line-height: 1.5; }
h1 { max-width: 18ch; font: 600 clamp(40px,4.6vw,64px)/1.08 var(--font-display); letter-spacing: -.04em; text-wrap: balance; }
h1 .accent { color: var(--clean); }
.subtitle { align-self: center; max-width: 48ch; color: var(--fg-2); font-size: 20px; line-height: 1.65; }
.author-strip { grid-column: 1 / -1; display: grid; grid-template-columns: 1.1fr .65fr 1.25fr; gap: 24px; margin-top: 36px; padding-top: 24px; border-top: 1px solid var(--line-2); color: var(--fg-2); font-size: 14px; line-height: 1.6; }
.author-strip > span { display: block; }
.author-strip b { display: block; margin-bottom: 5px; color: var(--fg-3); font-weight: 400; font-size: 12px; }
.header-actions { grid-column: 1 / -1; display: flex; align-items: center; flex-wrap: wrap; gap: 12px 24px; margin-top: 28px; }
.pdf-dl, .back-link { display: inline-flex; justify-content: center; align-items: center; gap: 10px; min-height: 44px; font-size: 14px; text-decoration: none; }
.pdf-dl { border: 1px solid var(--clean); background: var(--clean); color: #06140d; font-weight: 600; border-radius: 4px; padding: 10px 16px; }
.pdf-dl:hover { background: #52bd80; }
.pdf-dl::before { content: '\2193'; font-size: 18px; }
.back-link { color: var(--fg-2); padding-block: 10px; }
.back-link::before { content: '\2190'; }
.back-link:hover { color: var(--clean); }
.paper-layout { display: grid; grid-template-columns: 224px minmax(0,1fr); gap: 64px; padding-top: 48px; }
.paper-body { min-width: 0; }
.paper-index { position: sticky; top: 24px; align-self: start; }
.toc { max-height: calc(100dvh - 48px); overflow-y: auto; overscroll-behavior: contain; scrollbar-width: thin; scrollbar-color: var(--line-3) transparent; }
.toc h2 { color: var(--fg-3); font: 600 12px/1.5 var(--font-body); text-transform: uppercase; letter-spacing: .08em; margin-bottom: 18px; }
.toc ol { list-style: none; }
.toc li { margin: 0; }
.toc a { display: flex; gap: 12px; min-height: 44px; padding: 10px 10px 10px 12px; border-left: 2px solid var(--line-2); color: var(--fg-2); text-decoration: none; line-height: 1.4; }
.toc-num { flex-shrink: 0; color: var(--fg-3); font: 400 11px/1.9 var(--font-mono); }
.toc-name { display: block; font-size: 14px; }
.toc-detail { display: block; color: var(--fg-3); font-size: 12px; line-height: 1.5; margin-top: 4px; }
.toc-detail:empty { display: none; }
.toc a:hover { color: var(--fg-1); border-left-color: var(--clean); }
.toc a[aria-current] { color: var(--fg-1); border-color: var(--clean); background: linear-gradient(90deg,var(--clean-soft),transparent); }
.paper-menu { display: none; }
.paper-body section { padding-bottom: 56px; }
.section-mark { display: grid; grid-template-columns: 28px minmax(0,1fr); gap: 8px 16px; align-items: baseline; padding-bottom: 20px; margin-bottom: 28px; border-bottom: 1px solid var(--line-3); }
.section-mark .num { color: var(--clean); font: 400 12px/1.5 var(--font-mono); }
.section-mark .name { font: 600 28px/1.25 var(--font-display); letter-spacing: -.025em; }
.section-mark .meta { grid-column: 2; color: var(--fg-3); font-size: 13px; line-height: 1.5; }
.paper-body p, .paper-body ul, .callout { max-width: 69ch; }
.paper-body p { margin-bottom: 22px; }
.paper-body strong { color: var(--fg-1); font-weight: 600; }
.paper-body ul { padding-left: 22px; margin-bottom: 24px; }
.paper-body li { margin-bottom: 16px; padding-left: 4px; }
.paper-body li::marker { color: var(--fg-3); }
.paper-body h3 { margin: 32px 0 16px; font: 600 21px/1.4 var(--font-display); letter-spacing: -.02em; }
.paper-body > section > ol { max-width: 69ch; padding-left: 24px; margin-bottom: 28px; }
.paper-body code { font-family: var(--font-mono); font-size: .85em; overflow-wrap: anywhere; }
.paper-body pre { margin: 24px 0 32px; padding: 22px 24px; border: 1px solid var(--line-3); border-radius: 5px; background: var(--bg-2); overflow-x: auto; line-height: 1.65; }
.paper-body pre code { font-size: 14px; overflow-wrap: normal; }
.paper-table { max-width: 100%; overflow-x: auto; margin: 28px 0 36px; border: 1px solid var(--line-3); border-radius: 5px; scrollbar-width: thin; }
.paper-table table { width: 100%; border-collapse: collapse; font-size: 14px; line-height: 1.6; }
.paper-table th { padding: 14px 16px; text-align: left; vertical-align: bottom; background: var(--bg-2); color: var(--fg-1); border-bottom: 1px solid var(--line-3); font-weight: 600; }
.paper-table td { padding: 14px 16px; vertical-align: top; color: var(--fg-2); border-bottom: 1px solid var(--line-2); }
.paper-table tr:last-child td { border-bottom: 0; }
.paper-table th:first-child, .paper-table td:first-child { color: var(--fg-1); }
.paper-table td p { margin: 0; }
.paper-table caption { padding: 16px; text-align: left; color: var(--fg-1); background: var(--bg-2); }
.reference-ref { font-size: .85em; font-variant-numeric: tabular-nums; }
.refs li:target { outline: 1px solid var(--clean); outline-offset: 7px; }
.anchor-alias { display: block; scroll-margin-top: 90px; }
.paper-downloads { display: flex; flex-wrap: wrap; gap: 10px 24px; margin: 0 0 28px; padding: 20px 24px; border: 1px solid var(--line-3); border-radius: 5px; background: var(--bg-2); }
.paper-downloads a { display: inline-flex; align-items: center; min-height: 44px; font-size: 14px; }
.callout { margin: 28px 0; padding: 18px 24px; border-left: 3px solid var(--clean); background: var(--clean-soft); color: var(--fg-1); font-size: 19px; line-height: 1.7; }
.kpi-strip { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 1px; margin: 32px 0 0; border: 1px solid var(--line-3); border-radius: 6px; overflow: hidden; background: var(--line-2); }
.kpi-cell { padding: 20px 16px; background: var(--bg-2); }
.kpi-label { color: var(--fg-3); font-size: 12px; line-height: 1.5; }
.kpi-val { margin: 8px 0; color: var(--fg-1); font: 600 30px/1.2 var(--font-display); font-variant-numeric: tabular-nums; letter-spacing: -.02em; }
.kpi-sub { color: var(--fg-3); font-size: 12px; line-height: 1.5; }
figure { margin: 36px 0; border: 1px solid var(--line-3); border-radius: 6px; overflow: hidden; }
.figure-bar { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 6px 20px; background: var(--bg-2); border-bottom: 1px solid var(--line-3); font-size: 13px; }
.figure-bar > span { color: var(--fg-2); font-weight: 600; }
.figure-expand { display: inline-flex; align-items: center; gap: 10px; min-height: 44px; text-decoration: none; font-size: 13px; }
.figure-image-link { display: block; padding: 12px; background: #fff; cursor: zoom-in; }
figure picture, figure img { width: 100%; height: auto; display: block; }
figure figcaption { padding: 20px 24px; background: var(--bg-2); color: var(--fg-2); font-size: 15px; line-height: 1.7; }
figure figcaption b { color: var(--fg-1); font-weight: 600; }
.method-note { padding: 20px 24px; background: var(--bg-2); border: 1px solid var(--line-3); border-radius: 4px; margin: 28px 0; color: var(--fg-2); font-size: 16px; }
.refs ol { padding-left: 22px; }
.refs li { color: var(--fg-2); font-size: 16px; line-height: 1.7; }
.refs a, .cite code { overflow-wrap: anywhere; }
.paper-body .bibliography-note { margin-top: 24px; color: var(--fg-3); font-size: 15px; }
.cite { padding: 24px 28px; border: 1px solid var(--line-3); border-radius: 6px; background: var(--bg-2); }
.cov-h { color: var(--clean); font: 600 12px/1.5 var(--font-body); letter-spacing: .06em; text-transform: uppercase; }
.cite code { display: block; margin-top: 14px; color: var(--fg-1); font: 400 15px/1.75 var(--font-body); white-space: pre-wrap; }
.brief-footer { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 16px 32px; margin-top: 64px; padding-block: 28px; border-top: 1px solid var(--line-3); color: var(--fg-3); font-size: 12px; line-height: 1.6; }
.brief-footer a { text-decoration: none; }
.figure-dialog { width: min(1440px,calc(100% - 40px)); height: calc(100dvh - 40px); max-width: none; max-height: none; margin: auto; padding: 0; border: 1px solid var(--line-3); border-radius: 8px; background: var(--bg-1); color: var(--fg-1); overflow: hidden; }
.figure-dialog[open] { display: flex; flex-direction: column; }
.figure-dialog::backdrop { background: rgba(0,0,0,.82); }
.viewer-head { display: flex; align-items: center; flex-wrap: wrap; gap: 12px 24px; padding: 12px 20px; border-bottom: 1px solid var(--line-3); flex-shrink: 0; }
.viewer-head h2 { margin-right: auto; font: 600 20px/1.3 var(--font-display); }
.viewer-controls { display: flex; align-items: center; gap: 6px; }
.viewer-head button { min-width: 44px; min-height: 44px; border: 1px solid var(--line-3); border-radius: 4px; background: var(--bg-2); color: var(--fg-1); padding: 8px 12px; font-size: 14px; line-height: 1.4; }
.viewer-head button:hover { border-color: var(--clean); }
.viewer-head button:disabled { opacity: .45; cursor: default; }
#figure-zoom-level { min-width: 42px; text-align: center; color: var(--fg-2); font-size: 12px; font-variant-numeric: tabular-nums; }
.figure-canvas { flex: 1; min-height: 0; overflow: auto; overscroll-behavior: contain; background: #e9edef; padding: 24px; }
.figure-canvas img { display: block; max-width: none; height: auto; margin: 0 auto; background: #fff; }
.viewer-foot { padding: 16px 20px; border-top: 1px solid var(--line-3); display: flex; gap: 24px; align-items: start; max-height: 26%; overflow-y: auto; flex-shrink: 0; }
.viewer-foot p { flex: 1; color: var(--fg-2); font-size: 14px; line-height: 1.6; }
.viewer-foot a { flex-shrink: 0; min-height: 44px; display: flex; align-items: center; gap: 8px; font-size: 13px; }
@media (max-width: 1100px) {
  .wrap { padding-inline: 28px; }
  .brief-hero { column-gap: 40px; }
  .paper-layout { grid-template-columns: 204px minmax(0,1fr); gap: 36px; }
  .kpi-strip { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .banner { padding-inline: 28px; }
}
@media (max-width: 900px) {
  html { scroll-padding-top: calc(var(--paper-menu-height,64px) + 20px); }
  .paper-layout { display: block; padding-top: 0; }
  .paper-index { z-index: 30; top: 0; margin-bottom: 32px; }
  .paper-index.is-enhanced .paper-menu { display: flex; align-items: center; gap: 16px; min-height: 64px; width: 100%; padding: 14px 0; border: 0; border-bottom: 1px solid var(--line-3); background: var(--bg-1); color: var(--fg-1); text-align: left; font-size: 14px; }
  .paper-current { margin-left: auto; text-align: right; color: var(--fg-3); font-size: 13px; }
  .menu-chevron { color: var(--clean); }
  .paper-menu[aria-expanded="true"] .menu-chevron { transform: rotate(180deg); }
  .toc { max-height: none; padding-top: 24px; }
  .paper-index.is-enhanced .toc { display: none; position: absolute; top: 100%; left: 0; right: 0; max-height: calc(100dvh - 160px); padding: 12px; background: var(--bg-2); border: 1px solid var(--line-3); box-shadow: 0 12px 24px rgba(0,0,0,.35); }
  .paper-index.is-open .toc { display: block; }
  .toc h2 { display: none; }
  .toc a { min-height: 48px; }
  .toc ol { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 4px 16px; }
  .author-strip { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .author-strip > span:last-child { grid-column: 1 / -1; }
}
@media (max-width: 600px) {
  body { font-size: 17px; line-height: 1.75; }
  .wrap { padding-inline: 20px; }
  .banner { padding: 14px 20px; font-size: 12px; }
  .brief-hero { grid-template-columns: 1fr; padding-block: 28px 32px; }
  .kicker-row { margin-bottom: 24px; }
  .eyebrow { font-size: 13px; }
  h1 { font-size: 42px; max-width: 18ch; }
  .subtitle { margin-top: 24px; font-size: 18px; }
  .author-strip { gap: 20px 24px; margin-top: 28px; }
  .header-actions { gap: 12px; }
  .pdf-dl, .back-link { width: 100%; }
  .paper-index { margin-inline: -20px; }
  .paper-index.is-enhanced .paper-menu { padding-inline: 20px; }
  .paper-index.is-enhanced .toc { left: 12px; right: 12px; }
  .toc ol { grid-template-columns: 1fr; }
  .section-mark { grid-template-columns: 24px minmax(0,1fr); gap: 8px 10px; margin-bottom: 24px; padding-bottom: 16px; }
  .section-mark .name { font-size: 25px; }
  .section-mark .meta { font-size: 12px; }
  .paper-body section { padding-bottom: 40px; }
  .callout { padding: 16px 18px; font-size: 18px; }
  .kpi-cell { padding: 18px 14px; }
  .kpi-val { font-size: 28px; }
  figure { margin-block: 28px; }
  .figure-bar { padding-inline: 14px; }
  .figure-image-link { padding: 6px; }
  figure figcaption { padding: 18px; font-size: 14px; }
  .cite { padding: 20px; }
  .brief-footer { margin-top: 44px; gap: 12px; }
  .figure-dialog { width: 100%; height: 100dvh; border: 0; border-radius: 0; }
  .viewer-head { padding: 10px 16px; gap: 8px 12px; }
  .viewer-head h2 { font-size: 18px; }
  .viewer-controls { order: 3; justify-content: center; width: 100%; }
  .figure-canvas { padding: 12px; }
  .viewer-foot { padding: 12px 16px; display: block; max-height: 25%; }
  .viewer-foot p { font-size: 13px; }
  .viewer-foot a { margin-top: 8px; }
}
@media print {
  @page { margin: 14mm 16mm; }
  :root { --fg-1: #16181d; --fg-2: #37434b; --fg-3: #55606b; --clean: #1a7f4f; --line-3: #d8dee4; --line-2: #d8dee4; --bg-1: #fff; --bg-2: #f3f5f4; --clean-soft: #f3f5f4; }
  html { scroll-padding-top: 0; }
  body { background: #fff; font-size: 11pt; line-height: 1.6; }
  .wrap { max-width: none; padding-inline: 0; }
  .banner, .skip-link, .paper-index, .header-actions, .figure-bar, .figure-dialog { display: none !important; }
  .brief-hero { display: block; padding-block: 0 24px; }
  .kicker-row { margin-bottom: 20px; }
  h1 { max-width: 20ch; font-size: 36pt; }
  .subtitle { margin-top: 20px; max-width: none; font-size: 13pt; }
  .author-strip { grid-template-columns: repeat(2,minmax(0,1fr)); margin-top: 24px; font-size: 10pt; }
  .author-strip > span:last-child { grid-column: 1 / -1; }
  .paper-layout { display: block; padding-top: 28px; }
  .paper-body section { padding-bottom: 24px; }
  .section-mark { break-after: avoid; padding-bottom: 12px; margin-bottom: 16px; }
  .section-mark .name { font-size: 20pt; }
  .paper-body p { margin-bottom: 14px; }
  .paper-body p, .paper-body ul, .callout { max-width: none; orphans: 3; widows: 3; }
  .callout { margin-block: 20px; padding: 14px 18px; font-size: 12pt; break-inside: avoid; }
  .kpi-strip { grid-template-columns: repeat(4,minmax(0,1fr)); }
  .kpi-val { font-size: 22pt; }
  .kpi-cell { padding: 14px 12px; }
  figure, .kpi-strip, .cite { break-inside: avoid; }
  figure { margin-block: 24px; border-radius: 0; }
  .figure-image-link { padding: 8px; }
  figure img { max-height: 180mm; width: auto; max-width: 100%; margin-inline: auto; }
  figure figcaption { padding: 14px 18px; font-size: 10pt; }
  .refs li { font-size: 10pt; line-height: 1.6; }
  .paper-table { overflow: visible; border-radius: 0; margin-block: 18px; break-inside: avoid; }
  .paper-table table { table-layout: fixed; font-size: 8.5pt; line-height: 1.45; }
  .paper-table th, .paper-table td { padding: 8px; overflow-wrap: anywhere; }
  .paper-table thead { display: table-header-group; }
  .paper-table tr { break-inside: avoid; }
  .paper-body pre { white-space: pre-wrap; padding: 14px; break-inside: avoid; }
  .paper-body pre code { font-size: 9pt; overflow-wrap: anywhere; }
  .paper-body h3 { break-after: avoid; }
  .paper-downloads { display: none; }
  .cite code { font-size: 10pt; }
  .brief-footer { margin-top: 28px; padding-block: 18px; font-size: 9pt; }
  a { text-decoration: none; }
}