:root { --bg:#fff; --panel:#f7f7f7; --white:#fff; --ink:#202124; --muted:#5d6065; --accent:#b8322b; --accent-soft:#f7e6e2; --line:#e5e5e5; --positive:#3d7567; --negative:#b8322b; --radius:8px; }
* { box-sizing:border-box; }
html { scroll-behavior:smooth; scroll-padding-top:28px; }
body { margin:0; background:var(--bg); color:var(--ink); font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif; font-size:17px; line-height:1.6; -webkit-font-smoothing:antialiased; }
button,input { font:inherit; }
button,a,input,summary { -webkit-tap-highlight-color:transparent; }
button { cursor:pointer; }
a { color:inherit; text-decoration:none; }
a:hover { color:var(--accent); }
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible,.table-scroll:focus-visible { outline:3px solid var(--accent); outline-offset:4px; }
button:disabled { cursor:default; opacity:.48; }
[hidden] { display:none!important; }
.wrap { width:min(1040px,calc(100% - 48px)); margin-inline:auto; }
.reading-width { width:min(860px,calc(100% - 48px)); margin-inline:auto; }
.section { padding-block:48px; }
.visually-hidden { position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0; }
.skip-link { position:fixed; left:16px; top:-80px; z-index:100; padding:10px 18px; background:var(--ink); color:white; border-radius:8px; }
.skip-link:focus { top:12px; color:white; }
.hero { text-align:center; padding-block:48px 32px; }
h1 { max-width:1000px; margin:0 auto; font-size:clamp(30px,4.4vw,48px); font-weight:650; line-height:1.15; letter-spacing:-.025em; }
.authors { display:flex; flex-wrap:wrap; justify-content:center; column-gap:14px; row-gap:5px; max-width:1040px; margin:18px auto 8px; font-size:20px; font-weight:500; }
.authors a { color:#245e9b; }
.authors a:hover { color:var(--accent); text-decoration:underline; text-underline-offset:4px; }
sup { font-size:.63em; margin-left:2px; color:var(--muted); vertical-align:super; }
.affiliations { display:flex; flex-wrap:wrap; justify-content:center; column-gap:19px; row-gap:3px; margin:0; color:var(--muted); font-size:16.5px; }
.author-note { margin:5px 0 0; font-size:14px; color:var(--muted); }
.resource-links { display:flex; flex-wrap:wrap; justify-content:center; gap:10px; margin-top:20px; }
.resource-link { display:inline-flex; align-items:center; justify-content:center; gap:8px; padding:9px 16px; border:1px solid var(--ink); border-radius:999px; background:var(--ink); color:white; font-size:15.5px; font-weight:600; transition:background .15s,border-color .15s; }
.resource-link:hover { color:white; border-color:var(--accent); background:var(--accent); }
.resource-link:disabled { cursor:default; opacity:1; background:#eef0f2; border-color:#eef0f2; color:#52565b; }
.resource-link svg { width:16px; height:16px; fill:none; stroke:currentColor; stroke-width:1.7; stroke-linejoin:round; stroke-linecap:round; }
.arxiv-icon { font-family:Georgia,serif; font-size:17px; line-height:1; }
.video-section { max-width:1000px; padding-bottom:9px; }
.video-heading { display:flex; justify-content:space-between; align-items:center; gap:20px; margin-bottom:13px; }
.video-heading h2 { margin:0; font-size:18px; font-weight:650; letter-spacing:-.02em; }
.media-duration { color:var(--muted); font-size:14px; }
.video-frame { overflow:hidden; background:#211f1d; border-radius:6px; }
video { display:block; width:100%; height:auto; aspect-ratio:16/9; }
.video-caption { display:flex; justify-content:space-between; gap:20px; padding-top:13px; color:var(--muted); font-size:15.5px; }
.video-caption p { margin:0; }
.video-caption a { white-space:nowrap; }
.section-heading { margin-bottom:26px; }
.section-heading h2,.abstract-section h2,.citation-heading h2 { margin:0 0 14px; font-size:clamp(26px,3vw,34px); font-weight:650; line-height:1.25; letter-spacing:-.022em; }
.section-heading > p:last-child { margin:0; color:var(--muted); font-size:18px; }
.takeaway { display:flex; align-items:flex-start; gap:15px; margin:0 0 26px; padding:0; }
.takeaway-label { white-space:nowrap; color:var(--accent); font-size:15px; font-weight:750; padding-top:2px; }
.takeaway p { margin:0; font-size:16px; color:var(--muted); }
.paper-figure { margin:27px 0 0; }
.paper-figure img { display:block; width:100%; height:auto; background:white; }
figcaption { margin:12px auto 0; max-width:1000px; color:var(--muted); font-size:16px; line-height:1.6; }
figcaption strong { color:var(--ink); font-weight:650; }
.method-subheading { margin:28px 0 7px; font-size:24px; font-weight:600; line-height:1.3; letter-spacing:-.02em; }
.method-instructions { margin:0 0 20px; color:var(--muted); font-size:16px; }
.method-lab { padding:24px; background:var(--panel); border:1px solid var(--line); border-radius:var(--radius); }
.method-controls { display:flex; align-items:center; justify-content:space-between; gap:30px; }
.method-toggle { display:flex; padding:4px; background:#ededed; border:1px solid var(--line); border-radius:6px; }
.method-toggle button { padding:8px 18px; border:0; border-radius:6px; background:transparent; color:var(--muted); font-size:15px; font-weight:700; }
.method-toggle button[aria-pressed="true"] { background:var(--ink); color:white; box-shadow:0 2px 5px #00000012; }
.method-strength { display:flex; align-items:center; gap:14px; font-size:14px; }
.method-strength label { font-weight:600; white-space:nowrap; }
.method-strength input { width:160px; accent-color:var(--accent); }
.method-strength output { width:36px; font-family:monospace; font-size:15px; }
.method-illustration-caption { margin:18px 0 24px; color:var(--muted); font-size:14px; }
.method-tokens { display:grid; grid-template-columns:repeat(6,minmax(0,1fr)); gap:9px; }
.method-token { display:flex; flex-direction:column; align-items:center; min-width:0; padding:11px 8px 13px; border:1px solid var(--line); background:white; border-radius:9px; color:var(--ink); }
.method-token[aria-pressed="true"] { border-color:var(--ink); box-shadow:0 0 0 1px var(--ink); }
.method-token-plot { position:relative; width:100%; height:104px; margin-bottom:9px; }
.method-token-baseline { position:absolute; top:50%; left:12%; right:12%; height:1px; background:var(--line); }
.method-token-bar { position:absolute; left:calc(50% - 10px); width:20px; border-radius:3px; background:var(--positive); transition:transform .22s ease; }
.method-token[data-kind="negative"] .method-token-bar { background:var(--negative); }
.method-token-value { font-family:monospace; font-size:16px; font-weight:600; color:var(--positive); }
.method-token[data-kind="negative"] .method-token-value { color:var(--negative); }
.method-token[data-kind="zero"] .method-token-value { color:var(--muted); }
.method-token-label { margin-top:5px; font-family:monospace; font-size:13px; overflow-wrap:anywhere; }
.method-legend { margin:18px 0 26px; color:var(--muted); font-size:14px; text-align:center; }
.method-steps { display:grid; grid-template-columns:repeat(5,minmax(0,1fr)); gap:6px; }
.method-step { padding:10px 7px; border:1px solid var(--line); border-radius:6px; background:transparent; color:var(--muted); font-size:14px; font-weight:650; }
.method-step[aria-pressed="true"] { background:var(--accent-soft); border-color:#d89f96; color:var(--accent); }
.method-detail { min-height:112px; margin-top:18px; padding:18px 0; border-top:1px solid var(--line); }
.method-detail strong { font-size:18px; }
.method-detail p { margin:6px 0 0; font-size:15.5px; color:var(--muted); }
.method-token-note { min-height:40px; margin:15px 0 0; font-family:monospace; font-size:14px; line-height:1.7; }
.method-illustration-footnote { margin:10px 0 0; padding-top:12px; border-top:1px solid var(--line); font-size:13px; color:var(--muted); }
.method-bottom-note { margin:18px auto 0; max-width:780px; text-align:center; font-size:15px; color:var(--muted); }
.results-section { border-top:1px solid var(--line); }
.result-panel + .result-panel { margin-top:44px; padding-top:36px; border-top:1px solid var(--line); }
.result-intro { display:grid; grid-template-columns:minmax(0,1fr) auto; gap:7px 30px; margin-bottom:23px; }
.result-intro h3 { margin:0; font-size:28px; font-weight:650; letter-spacing:-.025em; }
.result-intro p { grid-column:1 / -1; margin:0; color:var(--muted); font-size:16px; }
.protocol-tag { grid-column:2; grid-row:1; align-self:center; color:var(--muted); font-size:14px; white-space:nowrap; }
.result-takeaway { margin:0 0 20px; font-size:17px; }
.table-scroll { position:relative; overflow-x:auto; overscroll-behavior-x:contain; scrollbar-width:thin; background:white; }
.results-table { width:100%; border-collapse:separate; border-spacing:0; text-align:right; font-size:14.5px; line-height:1.45; font-variant-numeric:tabular-nums; }
.math-table { min-width:960px; }
.coding-table { min-width:640px; }
.results-table th,.results-table td { padding:11px 10px; border-bottom:1px solid #efefef; vertical-align:middle; }
.results-table thead th { border-top:1px solid var(--ink); border-bottom:1px solid var(--line); color:var(--muted); background:white; font-size:13px; font-weight:600; white-space:nowrap; }
.results-table th[scope="row"],.results-table thead th:first-child { position:sticky; left:0; z-index:1; min-width:124px; text-align:left; background:white; }
.results-table th[scope="row"] { font-weight:500; }
.results-table td { white-space:nowrap; }
.results-table .model-group th { padding:20px 10px 12px; border-top:1px solid var(--line); border-bottom:1px solid var(--line); text-align:left; font-size:15px; font-weight:650; background:white; }
.results-table .model-name { position:sticky; left:10px; display:block; width:max-content; max-width:calc(100vw - 54px); }
.results-table .reference-row { color:var(--muted); }
.results-table .aggregate-col { border-left:1px solid var(--line); background:#f8f8f8; }
.results-table .score-mean strong { font-weight:750; }
.results-table .score-std { color:var(--muted); font-size:11.5px; font-weight:400; }
.results-table .second-best { text-decoration:underline; text-underline-offset:3px; }
.results-table .rad-row > * { background:#fdf3ef; }
.results-table .rad-row th { color:var(--accent); font-weight:650; }
.results-table .rad-row .aggregate-col { background:#f9e9e4; }
.results-table .gain-row > * { border-top:1px solid var(--line); color:var(--positive); font-size:13px; font-weight:600; }
.results-table .gain-row th { max-width:124px; }
.table-note { margin:12px 0 0; color:var(--muted); font-size:13px; line-height:1.7; }
.learning-dynamics .result-intro h3 { font-size:24px; }
.learning-dynamics .paper-figure { margin-top:20px; }
.evaluation-details { margin-top:29px; border-top:1px solid var(--line); border-bottom:1px solid var(--line); font-size:15px; }
.evaluation-details summary { padding:15px 0; cursor:pointer; font-weight:650; }
.evaluation-details > div { padding:0 0 14px 16px; color:var(--muted); }
.evaluation-details p { max-width:960px; margin:7px 0; }
.abstract-section { padding-block:48px 24px; }
.abstract-section > p { color:var(--muted); font-size:18px; line-height:1.7; }
.text-link { display:inline-flex; align-items:center; gap:15px; margin-top:9px; color:var(--accent); font-size:15.5px; font-weight:650; }
.text-link:hover { text-decoration:underline; }
.citation-section { padding-block:40px 48px; border-top:1px solid var(--line); }
.citation-heading { display:flex; justify-content:space-between; align-items:center; gap:25px; margin-bottom:22px; }
.citation-heading h2 { margin:0; font-size:30px; }
.copy-button { padding:9px 14px; border:1px solid var(--line); border-radius:6px; background:white; font-size:14px; font-weight:650; }
.copy-button:hover { color:var(--accent); border-color:var(--accent); }
.citation { overflow-x:auto; margin:0; padding:20px; border:1px solid var(--line); border-radius:4px; background:var(--panel); font-size:14px; line-height:1.7; }
.citation code { font-family:ui-monospace,SFMono-Regular,Consolas,monospace; }
.site-footer { border-top:1px solid var(--line); background:white; }
.footer-inner { display:flex; justify-content:space-between; align-items:center; gap:24px; min-height:72px; color:var(--muted); font-size:14px; }
.footer-inner p { margin:0; }
.footer-inner strong { color:var(--ink); }
.footer-inner > div { display:flex; gap:23px; }
@media (max-width:900px) { .method-strength { gap:8px; } .method-strength input { width:110px; } }
@media (max-width:680px) {
  .wrap,.reading-width { width:calc(100% - 34px); }
  body { font-size:16px; }
  .section { padding-block:36px; }
  .hero { padding-block:36px 24px; }
  h1 { font-size:clamp(28px,7.8vw,32px); }
  .authors { column-gap:13px; margin-top:16px; font-size:18px; }
  .affiliations { column-gap:12px; font-size:16px; }
  .author-note { font-size:13px; }
  .resource-links { gap:8px; margin-top:18px; }
  .resource-link { padding:9px 13px; font-size:15.5px; }
  .video-heading h2 { font-size:16px; }
  .media-duration { font-size:12px; }
  .video-frame { border-radius:6px; }
  .video-caption { gap:12px; font-size:14px; }
  .video-caption p { max-width:240px; }
  .section-heading { margin-bottom:22px; }
  .section-heading h2,.abstract-section h2 { font-size:26px; }
  .section-heading > p:last-child { font-size:16px; }
  .takeaway { gap:12px; padding:0; margin-bottom:22px; }
  .takeaway p { font-size:15px; }
  .takeaway-label { font-size:14px; }
  .paper-figure img { padding:0; border-radius:0; }
  figcaption { font-size:15px; }
  .method-lab { padding:18px 14px; }
  .method-controls { flex-direction:column; align-items:flex-start; gap:16px; }
  .method-strength { width:100%; display:grid; grid-template-columns:minmax(0,1fr) 40px; gap:8px 12px; }
  .method-strength input { min-width:0; width:100%; }
  .method-strength label { grid-column:1/-1; font-size:14px; }
  .method-tokens { grid-template-columns:repeat(3,minmax(0,1fr)); gap:8px; }
  .method-token-plot { height:78px; }
  .method-token-label { font-size:13px; }
  .method-legend { font-size:13px; }
  .method-steps { grid-template-columns:repeat(2,minmax(0,1fr)); }
  .method-step:last-child { grid-column:1/-1; }
  .method-detail { min-height:140px; padding:15px 0; }
  .method-detail p { font-size:15px; }
  .method-token-note { font-size:13px; min-height:60px; }
  .method-illustration-footnote { font-size:12px; }
  .method-bottom-note { font-size:14px; }
  .method-subheading { font-size:21px; }
  .method-instructions { font-size:15px; }
  .result-panel + .result-panel { margin-top:32px; padding-top:28px; }
  .result-intro { grid-template-columns:minmax(0,1fr); gap:10px; }
  .result-intro h3 { font-size:24px; }
  .result-intro p { font-size:15px; }
  .protocol-tag { grid-column:1; grid-row:auto; }
  .result-takeaway { font-size:16px; }
  .results-table th,.results-table td { padding:11px 9px; }
  .learning-dynamics .result-intro h3 { font-size:22px; }
  .evaluation-details { font-size:14px; }
  .abstract-section > p { font-size:18px; }
  .citation-heading { gap:10px; }
  .citation-heading h2 { font-size:26px; }
  .citation { padding:16px; font-size:13px; }
  .footer-inner { flex-direction:column; justify-content:center; align-items:flex-start; gap:13px; padding-block:24px; }
  .footer-inner > div { gap:20px; }
}
@media (prefers-reduced-motion:reduce) { html { scroll-behavior:auto; } *,*::before,*::after { transition:none!important; animation:none!important; } }