:root{color-scheme:light;--ink:#30343b;--muted:#656d77;--red:#8c1515;--line:#e1e4e8;--light:#f7f8fa}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:76px}body{margin:0;background:#fff;color:var(--ink);font:18px/1.8 -apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif}h1,h2,h3,p{margin-top:0}p{margin-bottom:22px}a{color:var(--red);text-decoration:none}a:hover{text-decoration:underline}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid #b66b6b;outline-offset:4px}h1{font-size:clamp(34px,4vw,52px);line-height:1.15;font-weight:650;color:var(--red);letter-spacing:-.03em;margin-bottom:16px}h2{font-size:30px;line-height:1.25;font-weight:650;letter-spacing:-.025em;margin-bottom:24px}h3{font-size:22px;line-height:1.4;font-weight:600;letter-spacing:-.015em;margin-bottom:14px}.hero{max-width:1020px;padding:76px 24px 0;margin:auto;text-align:center}.hero-line{font-size:24px;line-height:1.45;max-width:800px;margin:0 auto 30px;font-weight:400}.authors{font-size:18px;line-height:1.7;margin-bottom:5px}.authors a{white-space:nowrap}.affiliation{font-size:17px;color:var(--muted);margin-bottom:24px}.links{display:flex;flex-wrap:wrap;justify-content:center;gap:12px}.button{display:inline-flex;gap:12px;align-items:center;min-height:44px;padding:8px 20px;border-radius:24px;background:#30343b;color:#fff;font-size:15px;line-height:1.7}.button:hover{background:var(--red);text-decoration:none}.draft-note{font-size:13px;color:var(--muted);max-width:800px;margin:24px auto 28px;line-height:1.6}.tldr{text-align:left;max-width:900px;margin:0 auto 32px;font-size:18px;line-height:1.75}.tldr>strong{color:var(--red)}.overview{max-width:950px;margin:0 auto 48px;padding:0 25px}.architecture{display:grid;grid-template-columns:1fr 28px 1fr 28px 1fr;align-items:stretch}.model{border:1px solid #ccc;border-top:3px solid var(--red);padding:18px 17px;background:#fafafa;text-align:center}.model h3{font-size:20px;margin-bottom:8px}.model>p{font-size:14px;margin-bottom:15px;line-height:1.6}.model-detail{font-size:13px;border-top:1px solid var(--line);padding-top:10px;line-height:1.8}.model-detail strong{font-weight:500}.cadence{display:block;font-size:12px;color:var(--muted);margin-top:12px}.connector{display:grid;place-items:center;color:#888;font-size:22px}.feedback{display:flex;justify-content:center;gap:30px;flex-wrap:wrap;margin:17px 0 8px;font-size:13px}.feedback b{margin-right:6px;color:var(--red);font-weight:600}.caption{font-size:14px;line-height:1.65;color:var(--muted)}.overview .caption{text-align:center;margin-bottom:0}.article-layout{max-width:890px;margin:auto;padding:0 25px}.article section{margin:0 0 64px;scroll-margin-top:20px}.article p{text-align:left}.editor-note{border-left:2px solid #ccc;padding:9px 16px;margin:22px 0;background:var(--light);font-size:13px;line-height:1.65;color:var(--muted)}.editor-note>span{font-weight:600;display:block;color:#555;margin-bottom:4px}.method-list article{display:flex;gap:18px;margin:24px 0}.method-list article>span{color:var(--red);font-size:15px;padding-top:2px}.method-list h3{margin-bottom:8px}.method-list p{margin:0}code{font-size:.9em;color:var(--red)}details{border:1px solid var(--line);border-radius:8px;margin:28px 0}summary{display:flex;align-items:center;justify-content:space-between;gap:15px;min-height:52px;padding:13px 18px;font-size:15px;font-weight:600;cursor:pointer;list-style:none;background:var(--light);border-radius:8px}summary::-webkit-details-marker{display:none}summary span{font-size:22px;font-weight:400}details[open] summary span{transform:rotate(45deg)}.details-body{padding:15px 18px 0}.details-body p{font-size:15px}.schedule{border:1px solid var(--line);margin:25px 0}.tabs{display:flex;border-bottom:1px solid var(--line);background:#fafafa}.tabs button{font:inherit;font-size:14px;flex:1;padding:12px 8px;border:0;border-bottom:2px solid transparent;background:transparent;color:#555;cursor:pointer}.tabs button[aria-selected=true]{color:var(--red);border-bottom-color:var(--red);font-weight:600;background:white}#schedule-panel{padding:23px 23px 0}#schedule-title{font-size:18px}#schedule-copy{font-size:14px}.timeline{display:flex;flex-direction:column;gap:9px;margin:23px 0}.lane{display:grid;grid-template-columns:62px 1fr;gap:10px;align-items:center}.lane-label{font-size:13px;color:#555}.lane-track{display:grid;grid-template-columns:repeat(12,1fr);gap:4px;min-height:27px;background:repeating-linear-gradient(90deg,transparent 0,transparent calc(8.333% - 1px),#eee calc(8.333% - 1px),#eee 8.333%)}.block{height:27px;border-radius:2px}.astra{background:var(--red)}.act{background:#626262}.check{background:#bc9696}.legend{display:flex;flex-wrap:wrap;gap:22px;padding:12px 23px;font-size:13px;color:#555;border-top:1px solid var(--line)}.legend>span{display:flex;gap:7px;align-items:center}.key{width:10px;height:10px}.equation{text-align:center;margin:25px 0;padding:18px;background:#fafafa}.equation>span{font-size:12px;color:var(--muted);letter-spacing:.05em}.equation p{text-align:center;margin:7px 0;font-size:20px}.equation strong{color:var(--red);font-weight:600}.equation small{font-size:13px;color:var(--muted)}.result-placeholder{padding:25px;text-align:center;background:#f7f7f7;border:1px dashed #bbb;margin:25px 0}.slot-label{font-size:12px;color:#777;letter-spacing:.05em}.result-placeholder h3{margin:10px 0}.result-placeholder p{text-align:center;font-size:15px;max-width:650px;margin:0 auto}.table-scroll{overflow-x:auto;margin:28px 0;overscroll-behavior-x:contain}table{border-collapse:collapse;width:100%;font-size:15px;line-height:1.5}caption{text-align:left;color:var(--muted);font-size:14px;padding-bottom:12px}th,td{text-align:left;padding:13px 12px;border-bottom:1px solid var(--line)}thead{border-top:2px solid #666;border-bottom:1px solid #666}th{font-weight:600}td{white-space:nowrap}th small{display:block;font-size:12px;font-weight:400;color:#777;margin-top:4px}.table-scroll+.caption{margin-top:13px}.video-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin:25px 0}.video-slot{aspect-ratio:16/10;display:flex;flex-direction:column;justify-content:center;align-items:center;background:#f4f4f4;border:1px dashed #bbb;text-align:center;color:#666;font-size:14px;line-height:1.6;padding:15px}.video-slot span{font-size:12px;margin-top:8px;color:#888}.video-card h3{font-size:16px;margin:14px 0 8px}.video-card p{font-size:14px;text-align:left;line-height:1.65}.video-card video{width:100%;aspect-ratio:16/10;background:#eee}.references ol{padding-left:24px}.references li{margin-bottom:13px;font-size:15px}.references li span{display:block;font-size:13px;color:var(--muted)}footer{text-align:center;background:#fafafa;border-top:1px solid #eee;padding:27px 20px;font-size:13px;color:var(--muted)}footer p{margin:2px 0}.skip{position:absolute;left:10px;top:-100px;background:white;padding:10px;z-index:10}.skip:focus{top:10px}.sr-only{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media(max-width:680px){.hero{padding:44px 20px 0}h1{font-size:34px}.hero-line{font-size:20px;margin-bottom:22px}.authors{font-size:17px}.affiliation{font-size:18px}.tldr{font-size:16px}.overview,.article-layout{padding:0 20px}.architecture{grid-template-columns:1fr}.connector{height:30px;transform:rotate(90deg)}.model{padding:16px}.model-detail{font-size:14px}.feedback{flex-direction:column;align-items:center;gap:5px}.article p{text-align:left}h2{font-size:26px}.video-grid{grid-template-columns:1fr;gap:23px}.video-slot{aspect-ratio:16/8;font-size:16px}.video-card h3{font-size:18px}.video-card p{font-size:15px}.tabs button{font-size:12px}#schedule-panel{padding:18px 15px 0}.lane{grid-template-columns:44px 1fr}.lane-label{font-size:12px}.legend{padding:12px 15px;gap:14px;font-size:12px}.author-space{display:inline-block;width:9px}.article section{margin-bottom:48px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

.article section>h3{margin-top:36px}.loop-example{border-left:3px solid var(--red);padding:3px 0 3px 20px;margin:24px 0}.loop-example>strong{display:block;margin-bottom:10px}.loop-example p:last-child{margin-bottom:0}

.abstract-section{max-width:890px;margin:44px auto 56px;padding:0 25px}.abstract-section h2{text-align:center}.abstract-section p{text-align:left;font-size:17px;line-height:1.85}#efficiency>h3,#results h3{margin-top:36px}@media(max-width:680px){.abstract-section{padding:0 20px}.abstract-section p{text-align:left}}

.system-label{display:block;color:var(--red);font-size:13px;font-weight:600;margin-bottom:7px}

.method-figure{margin:20px 0 30px}.method-figure img{display:block;width:100%;height:auto}.method-figure figcaption{font-size:14px;line-height:1.65;margin-top:12px;color:var(--muted);text-align:left}.method-figure figcaption strong{color:var(--ink)}

/* Verified test results and native rollout playback. */
.results-figure{margin:28px 0}.results-figure img{display:block;width:100%;height:auto}.results-figure figcaption{font-size:14px;line-height:1.65;color:var(--muted);margin-top:12px}.task-results td,.usage-results td{text-align:right;font-variant-numeric:tabular-nums}.task-results thead th:not(:first-child),.usage-results thead th:not(:first-child){text-align:right}.task-results tbody th,.task-results tbody td{border:0;padding-top:8px;padding-bottom:8px}.task-results tfoot{border-top:2px solid #666;font-weight:600}.task-results{margin-bottom:24px}.usage-results{margin-bottom:24px}.result-videos{grid-template-columns:repeat(2,minmax(0,1fr));gap:30px 24px}.result-videos video{display:block;width:100%;aspect-ratio:2/1;background:#eee}.result-videos h4{font-size:18px;line-height:1.4;margin:14px 0 8px}.result-videos .video-meta{font-size:13px;color:var(--muted);margin-bottom:10px}.trace-link{font-size:13px}@media(max-width:680px){.result-videos{grid-template-columns:1fr}.task-results th,.task-results td{padding-left:8px;padding-right:8px}}

/* Numbered citations in prose, tables, and the bibliography. */
.citation,.references a{color:#3478f6;text-decoration:underline dotted #627087;text-underline-offset:3px}.citation{white-space:nowrap;font-weight:400}.citation:hover,.references a:hover{color:#245bb9;text-decoration-style:solid}.citation:focus-visible,.references a:focus-visible{outline:2px solid #3478f6;outline-offset:3px}.references ol{padding-left:32px}.references li::marker{content:"[" counter(list-item) "] ";color:var(--ink)}.references li{scroll-margin-top:24px}.references li:target{background:#eef3f8;border-radius:4px}

/* Published baseline comparison. */
.baseline-results{margin-bottom:24px;min-width:720px}.baseline-results td{text-align:right;font-variant-numeric:tabular-nums}.baseline-results thead th:not(:first-child){text-align:right}.baseline-results tbody td,.baseline-results tbody th{border:0}.baseline-results .ours-row{background:#edf7f7;color:#166e76;font-weight:600}.baseline-results .oracle-row{border-top:1px dashed #b8aa8b;color:#75603b}.baseline-results th small{max-width:235px;font-size:12px;line-height:1.5}.baseline-results .ours-row th small{color:#377b80}

/* Full-width hard-success rollouts, one video per row. */
.s3-key{color:#906008}.s1-key{color:#147c76}.s2-key{color:#7055b4}
.hard-rollouts{width:100%;margin:32px 0}
.hard-rollout{margin:0 0 56px}.rollout-heading{display:flex;align-items:baseline;justify-content:space-between;gap:16px;flex-wrap:wrap}.rollout-heading h4{font-size:24px;line-height:1.3;letter-spacing:-.02em;margin:0}.rollout-heading span{font-size:14px;color:var(--muted)}
.article .rollout-goal{text-align:left;font-size:17px;font-weight:400;line-height:1.6;color:#303f50;background:#f5f7fa;border-left:3px solid #b2bfce;border-radius:0 6px 6px 0;padding:12px 16px;margin:14px 0 16px;overflow-wrap:break-word}.rollout-goal::before{content:"Task instruction";display:block;font-size:11px;font-weight:700;line-height:1.4;letter-spacing:.08em;text-transform:uppercase;color:#385b7d;margin-bottom:4px}.hard-rollout video{display:block;width:100%;height:auto;aspect-ratio:8/5;background:#0c1525;border-radius:10px}
.clip-links{display:flex;gap:24px;flex-wrap:wrap;font-size:13px;margin:12px 0 0}
@media(max-width:680px){.hard-rollout{margin-bottom:36px}.rollout-heading{gap:0}.rollout-heading h4{width:100%;font-size:22px}.rollout-heading span{margin-bottom:9px}.article .rollout-goal{font-size:16px;padding:10px 14px}}

/* One featured task per suite; the other three are collapsed. */
.suite-heading{font-size:13px;font-weight:650;text-transform:uppercase;letter-spacing:.12em;color:var(--muted);border-bottom:1px solid var(--line);padding-bottom:12px;margin:0 0 24px}.rollout-suite{margin-bottom:52px}.rollout-suite>.hard-rollout{margin-bottom:22px}.more-rollouts .details-body{padding:20px 0 0}.more-rollouts{border:0}.more-rollouts .hard-rollout:last-child{margin-bottom:16px}

/* Compact module interfaces in Methods. */
.module-equation{font-size:16px;margin:20px 0;padding:4px 0;overflow-x:auto}.module-equation .katex-display{margin:0;padding:4px 0}.article .module-notation{font-size:inherit;line-height:inherit;text-align:left;margin-bottom:22px}.module-notation .katex{font-size:1.08em}@media(max-width:680px){.module-equation{font-size:15px}}

/* Reading rhythm and navigation for the long research article. */
.section-nav{position:sticky;top:0;z-index:5;display:flex;justify-content:center;gap:8px;max-width:840px;margin:36px auto 0;padding:8px 12px;background:#fff;border-bottom:1px solid var(--line)}
.section-nav a{display:flex;align-items:center;justify-content:center;min-height:40px;padding:4px 18px;border-radius:6px;color:var(--muted);font-size:14px;font-weight:600;line-height:1.4}
.section-nav a:hover,.section-nav a:focus-visible{background:var(--light);color:var(--red);text-decoration:none}
h1,h2,h3,.hero-line{text-wrap:balance}
.article section+section{border-top:1px solid var(--line);padding-top:36px}
.article section>h3:first-of-type{margin-top:28px}
summary:hover{background:#edf0f4}
summary span{flex-shrink:0;color:var(--muted)}
details[open]>summary{border-bottom:1px solid var(--line);border-radius:8px 8px 0 0}
.details-body>.table-scroll{margin-top:8px}
.baseline-results tbody tr:not(.ours-row):not(.oracle-row)+tr:not(.ours-row):not(.oracle-row){border-top:1px solid #eef0f3}
.rollout-heading{row-gap:6px}
.rollout-heading span{font-size:13px;line-height:1.6;font-variant-numeric:tabular-nums}
.more-rollouts .details-body{padding-top:28px}
.more-rollouts .hard-rollout+.hard-rollout{border-top:1px solid var(--line);padding-top:28px}
.references li{line-height:1.7;margin-bottom:18px;overflow-wrap:anywhere}
footer{padding:32px 20px}
@media(max-width:680px){
 body{font-size:17px;line-height:1.75}
 h2{font-size:27px}h3{font-size:20px}
 .hero-line{font-size:20px;line-height:1.5}.affiliation{font-size:16px}
 .section-nav{gap:0;margin-top:28px;padding:6px 12px}
 .section-nav a{flex:1;padding:6px 8px;font-size:13px}
 .abstract-section{margin-top:32px;margin-bottom:44px}.abstract-section p{font-size:16px;line-height:1.8}
 .article section+section{padding-top:28px}
 .article section>h3,#efficiency>h3,#results h3{margin-top:28px}
 .rollout-heading h4{font-size:22px;overflow-wrap:anywhere}.rollout-heading span{margin-bottom:0}
 .article .rollout-goal{font-size:16px;margin-top:12px}
 .rollout-suite{margin-bottom:40px}
 .baseline-results{min-width:700px}
 .module-equation{font-size:15px;padding:4px 0}
}

/* Opening overview: shared 0–100% scale and explicit oracle reference. */
.opening-results{max-width:890px;margin:44px auto 60px;padding:0 25px}
.opening-results h2{font-size:26px;margin-bottom:8px}
.opening-context{font-size:14px;color:var(--muted);margin-bottom:24px}
.opening-chart{margin:0;--label-width:190px;--value-width:68px;--chart-gap:18px}
.score-axis{display:flex;justify-content:space-between;margin-left:calc(var(--label-width) + var(--chart-gap));margin-right:calc(var(--value-width) + var(--chart-gap));font-size:11px;color:var(--muted);line-height:1.5;margin-bottom:10px}
.score-axis span{width:0;text-align:center;white-space:nowrap}.score-axis span:last-child{direction:rtl}
.score-rows{list-style:none;padding:0;margin:0}
.score-row{display:grid;grid-template-columns:var(--label-width) minmax(0,1fr) var(--value-width);gap:var(--chart-gap);align-items:center;min-height:44px}
.score-name{font-size:14px;line-height:1.35;color:#505b67}.score-name small{display:block;font-size:11px;color:#8c703d;margin-top:2px}
.score-track{display:block;position:relative;height:24px;background:linear-gradient(to right,#e9edf1 1px,transparent 1px);background-size:25% 100%;border-right:1px solid #e9edf1}
.score-bar{display:block;position:absolute;left:0;top:4px;height:16px;background:#b8c2cd;border-radius:0 3px 3px 0}
.score-value{font-size:14px;text-align:right;font-variant-numeric:tabular-nums;color:#505b67}
.score-row.ours .score-bar{background:#187d86;height:20px;top:2px}.score-row.ours .score-name,.score-row.ours .score-value{font-weight:700;color:#166e76}
.score-row.oracle .score-bar{background:#ac853d}.score-row.oracle .score-value{color:#80622c}
.opening-chart figcaption{font-size:13px;line-height:1.65;color:var(--muted);margin-top:20px;padding-top:16px;border-top:1px solid var(--line)}
@media(max-width:680px){
 .opening-results{padding:0 20px;margin-top:32px;margin-bottom:44px}.opening-results h2{font-size:23px}
 .opening-context{font-size:13px;margin-bottom:20px}.score-axis{margin-left:0;margin-right:8px}
 .score-row{grid-template-columns:minmax(0,1fr) auto;gap:5px 12px;padding:9px 0;min-height:0}
 .score-name{grid-column:1;grid-row:1;font-size:13px}.score-name small{display:inline;margin-left:8px;font-size:10px}
 .score-value{grid-column:2;grid-row:1;font-size:13px}.score-track{grid-column:1 / -1;grid-row:2;height:18px}
 .score-bar{height:12px;top:3px}.score-row.ours .score-bar{height:16px;top:1px}
 .opening-chart figcaption{font-size:12px;margin-top:16px}
}

/* Opening teaser: keep video legible at desktop width and fluid on mobile. */
.opening-teaser{max-width:1250px;margin:44px auto 60px;padding:0 25px}
.opening-teaser figure{margin:0}
.opening-teaser video{display:block;width:100%;height:auto;aspect-ratio:16/9;background:#f7f7f2;border-radius:10px}
.opening-teaser figcaption{max-width:840px;margin:14px auto 0;font-size:13px;line-height:1.65;color:var(--muted)}
@media(max-width:680px){.opening-teaser{padding:0 20px;margin:32px auto 44px}.opening-teaser figcaption{font-size:12px}}

.monitor-false-key{color:#bd2626}.monitor-true-key{color:#18763d}

/* Reusable citation at the end of the article. */
.citation-section pre{margin:20px 0 14px;padding:22px 24px;background:var(--light);border:1px solid var(--line);border-radius:8px;overflow-x:auto;font-size:14px;line-height:1.7;tab-size:2}
.citation-section code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:inherit;color:var(--ink)}
.citation-section>a{font-size:14px}
.citation-section pre:focus-visible{outline:2px solid #3478f6;outline-offset:3px}
@media(max-width:680px){.citation-section pre{padding:16px;font-size:12px}}
