:root {
  color-scheme: light;
  --ink: #102b3b;
  --muted: #596875;
  --line: #dce3e8;
  --blue: #2160b8;
  --pale: #f5f8fb;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body { margin: 0; background: #fff; color: var(--ink); font: 17px/1.7 'Segoe UI', system-ui, sans-serif; }
a { color: var(--blue); text-underline-offset: 4px; }
a:hover { text-decoration: underline; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid var(--blue); outline-offset: 5px; }
main, .site-nav, footer { width: min(1160px, calc(100% - 64px)); margin-inline: auto; }
p { margin: 0 0 18px; }
h1, h2, h3, h4 { color: var(--ink); }
h1, h2 { font-family: Georgia, 'Times New Roman', serif; font-weight: 400; }
h2 { margin: 0 0 24px; font-size: clamp(30px, 3.3vw, 43px); line-height: 1.18; letter-spacing: -.025em; }
h3 { font-size: 21px; line-height: 1.4; margin: 0 0 12px; font-weight: 600; }
h4 { margin: 0; font-size: 18px; font-weight: 600; }
sup { font-size: .68em; }
section { padding: 64px 0; border-top: 1px solid var(--line); }
figure { margin: 0; }
img { display: block; width: 100%; height: auto; }
figcaption { margin-top: 16px; color: var(--muted); font-size: 14px; line-height: 1.6; }
.site-nav { display: flex; justify-content: space-between; align-items: center; gap: 24px; padding-block: 24px; font-size: 14px; }
.site-nav a, footer a { text-decoration: none; }
.home-link { color: var(--ink); font-weight: 600; }
.home-link span { color: var(--muted); margin-left: 6px; }
nav { display: flex; gap: 26px; }
nav a { color: var(--muted); }
.hero { padding: 62px 0 64px; text-align: center; }
.venue { font-size: 14px; color: var(--blue); font-weight: 600; letter-spacing: .04em; margin-bottom: 24px; }
.venue span { padding-inline: 8px; }
h1 { font-size: clamp(40px, 5.7vw, 69px); line-height: 1.08; letter-spacing: -.045em; margin: 0 0 22px; }
h1 span { color: var(--blue); }
.paper-subtitle { font-size: clamp(18px, 2vw, 24px); margin-bottom: 30px; }
.authors, .affiliations { display: flex; justify-content: center; flex-wrap: wrap; column-gap: 24px; row-gap: 6px; }
.authors { margin-bottom: 12px; }
.authors a { color: inherit; }
.authors sup { margin-left: 3px; }
.affiliations { font-size: 14px; color: var(--muted); column-gap: 18px; margin-bottom: 6px; }
.author-note { font-size: 13px; color: var(--muted); }
.author-note span { margin-inline: 8px; }
.resource-buttons { display: flex; justify-content: center; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.button { border: 1px solid var(--line); border-radius: 6px; padding: 10px 20px; color: var(--ink); text-decoration: none; font-size: 15px; font-weight: 600; }
.button:hover { background: var(--pale); text-decoration: none; }
.button.primary { background: var(--blue); color: #fff; border-color: var(--blue); }
.button.primary:hover { background: #184c94; }
.opening, .scope { display: grid; grid-template-columns: 1fr 1.2fr; gap: 64px; }
.opening p:last-child, .scope p:last-child { margin-bottom: 0; }
.eyebrow { color: var(--blue); font-size: 13px; font-weight: 650; text-transform: uppercase; letter-spacing: .12em; margin-bottom: 14px; }
.section-lead { max-width: 870px; color: var(--muted); margin-bottom: 30px; }
.main-figure { margin-top: 32px; }
.main-figure figcaption { display: flex; justify-content: space-between; gap: 20px; }
.main-figure figcaption a { flex-shrink: 0; }
.mechanism-notes { display: grid; grid-template-columns: 1fr 1fr; gap: 52px; margin-top: 40px; }
.mechanism-notes p { color: var(--muted); margin-bottom: 0; }
.chart-figure { margin-top: 32px; }
.results-heading { margin-top: 48px; }
.results-heading p { color: var(--muted); font-size: 15px; }
.transfer-figure { max-width: 920px; border: 1px solid var(--line); border-radius: 8px; padding: 30px 34px; margin: 26px auto 30px; }
.legend { display: flex; flex-wrap: wrap; gap: 24px; font-size: 14px; margin-bottom: 28px; }
.legend > span { display: flex; align-items: center; gap: 8px; }
.swatch { width: 16px; height: 10px; display: inline-block; border-radius: 2px; }
.sft { background: #f36a3c; }
.corridor { background: #3b7edd; }
.bar-group + .bar-group { margin-top: 30px; }
.group-heading { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: 4px 16px; margin-bottom: 12px; }
.group-heading > span { color: var(--muted); font-size: 13px; }
.group-heading strong { color: var(--ink); font-weight: 600; margin-left: 5px; }
.group-heading .cost { color: #b23b14; }
.bar-row, .axis-row { display: grid; grid-template-columns: minmax(0, 1fr) 140px; gap: 18px; align-items: center; }
.bar-row + .bar-row { margin-top: 7px; }
.bar-track { height: 22px; border-left: 1px solid #a8b7c3; background: repeating-linear-gradient(to right, transparent 0, transparent calc(20% - 1px), #e4eaf0 calc(20% - 1px), #e4eaf0 20%); }
.bar { height: 100%; border-radius: 0 2px 2px 0; }
.bar-value { font-variant-numeric: tabular-nums; font-size: 16px; font-weight: 600; white-space: nowrap; }
.bar-value span { color: var(--muted); font-size: 13px; font-weight: 400; }
.axis { display: flex; justify-content: space-between; border-top: 1px solid #a8b7c3; margin-top: 10px; padding-top: 4px; font-size: 11px; color: var(--muted); }
.transfer-figure figcaption { margin-top: 24px; }
.method-details { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); margin-top: 28px; }
summary { cursor: pointer; padding-block: 17px; font-size: 15px; font-weight: 600; }
.details-body { padding: 8px 0 22px; color: var(--muted); }
.details-body p:last-child { margin-bottom: 0; }
.equation { color: var(--ink); font-family: Georgia, serif; font-size: clamp(17px, 2vw, 23px); padding: 22px; margin: 16px 0; background: var(--pale); overflow-x: auto; }
.evidence-layout { display: grid; grid-template-columns: 1fr 1.15fr; gap: 60px; margin-top: 32px; }
.evidence-layout p { color: var(--muted); }
.table-wrap { min-width: 0; overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 15px; }
caption { text-align: left; color: var(--muted); font-size: 13px; margin-bottom: 12px; }
th, td { text-align: right; padding: 13px 12px; border-bottom: 1px solid var(--line); font-variant-numeric: tabular-nums; }
th:first-child { text-align: left; padding-left: 0; }
thead th { font-size: 13px; font-weight: 600; }
tbody th { font-weight: 500; }
.scope p { color: var(--muted); }
.download-list a { display: flex; justify-content: space-between; gap: 20px; padding: 18px 0; border-bottom: 1px solid var(--line); text-decoration: none; }
.download-list a:hover { background: var(--pale); }
.download-list a span:first-child { color: var(--ink); }
.download-list a span:last-child { font-size: 14px; text-align: right; }
.citation { margin-top: 42px; }
.citation-header { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
.citation-header h3 { margin: 0; }
.citation-header > div { display: flex; align-items: center; gap: 20px; font-size: 14px; }
button { font: inherit; color: var(--ink); border: 1px solid var(--line); background: #fff; border-radius: 5px; padding: 8px 12px; cursor: pointer; }
button:hover { background: var(--pale); }
.citation-note { font-size: 13px; color: var(--muted); margin: 12px 0; }
pre { padding: 24px; background: var(--pale); border-radius: 6px; overflow-x: auto; font-size: 13px; line-height: 1.7; }
.copy-status { min-height: 24px; font-size: 14px; color: var(--blue); margin: 0; }
footer { display: flex; justify-content: space-between; gap: 24px; padding: 26px 0 36px; border-top: 1px solid var(--line); font-size: 13px; }
footer a { color: var(--muted); }
.sr-only, .skip-link:not(:focus) { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
.skip-link:focus { position: fixed; top: 12px; left: 12px; z-index: 10; padding: 12px; background: #fff; }
@media (max-width: 760px) {
  main, .site-nav, footer { width: calc(100% - 36px); }
  .site-nav { padding-block: 18px; gap: 12px; font-size: 12px; }
  nav { gap: 14px; }
  .hero { padding: 42px 0; }
  h1 { font-size: clamp(36px, 7.3vw, 54px); }
  .paper-subtitle { max-width: 480px; margin-inline: auto; }
  .authors { column-gap: 16px; font-size: 15px; }
  .affiliations { flex-direction: column; font-size: 12px; }
  .button { padding: 10px 14px; font-size: 14px; }
  section { padding-block: 42px; }
  .opening, .scope, .mechanism-notes, .evidence-layout { grid-template-columns: 1fr; gap: 22px; }
  .opening h2, .scope h2 { margin-bottom: 0; }
  .main-figure figcaption { display: block; }
  .main-figure figcaption a { display: inline-block; margin-top: 8px; }
  .transfer-figure { padding: 22px 16px; }
  .bar-row, .axis-row { grid-template-columns: minmax(0, 1fr) 98px; gap: 12px; }
  .bar-value { font-size: 14px; }
  .bar-value span { font-size: 11px; }
  .group-heading { display: block; }
  .group-heading h4 { font-size: 16px; }
  .equation { padding: 16px; }
  footer { flex-wrap: wrap; gap: 8px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}