/* PRISM research story: warm paper, charcoal typography, restrained pine accents. */
:root {
  --bg: #fdfcf9;
  --surface: #f1f2ec;
  --accent-soft: #e0e8db;
  --sans: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --ink: #222923;
  --text: #424a43;
  --muted: #667067;
  --faint: #626e5e;
  --line: #dbdfd6;
  --soft: #f2f3ed;
  --link: #35634f;
  --gold: #557864;
  --page-width: 1120px;
  --text-width: 800px;
  --grid-gap: 24px;
  --chapter-offset: 24px;
}
html { scroll-padding-top: var(--chapter-offset); scroll-behavior: auto; }
body { padding-left: 168px; background: var(--bg); font: 17px/1.7 var(--sans); color: var(--text); }
main { width: calc(100% - 64px); max-width: var(--page-width); margin: 0 auto; padding: 0; }
.section-shell { width: 100%; max-width: none; margin: 0; padding: 0; }
.section-space { padding: 48px 0 64px; border: 0; border-top: 2px solid var(--line); background: none; }
h1, h2, h3, h4 { color: var(--ink); }
.section-title, .story-title { display: flex; align-items: baseline; gap: 20px; max-width: none; font: 600 32px/1.28 var(--sans); letter-spacing: -.02em; margin: 0 0 22px; }
.chapter-number { flex: none; color: var(--link); font: 500 18px/1.4 var(--sans); letter-spacing: 0; font-variant-numeric: tabular-nums; }
.chapter-title { min-width: 0; text-wrap: balance; }
.section-title.solo { margin-bottom: 22px; }
.kicker { display: none; }
.article-copy { max-width: var(--text-width); margin: 18px 0 0; font-size: 17px; line-height: 1.75; }
.article-copy p + p { margin-top: 14px; }
.article-copy a, .authors a { color: var(--link); }
.article-copy a { text-decoration: underline; text-underline-offset: 3px; }
.article-copy strong { font-weight: 600; color: var(--ink); }
.article-copy h3 { font: 600 21px/1.4 var(--sans); margin: 28px 0 12px; }
p { text-wrap: pretty; }
.section-intro { margin-top: 0; max-width: var(--text-width); font-size: 18px; color: var(--text); }
.section-heading-row { margin-bottom: 26px; }
.keep-words { white-space: nowrap; }
.button { min-height: 38px; height: auto; padding: 9px 16px; border: 1px solid #bec9bc; border-radius: 4px; font: 500 14px/1.2 var(--sans); background: #fff; color: var(--ink); }
.button:disabled { opacity: 1; color: #536350; border-color: #cbd3c6; }
.button:hover:not(:disabled) { background: var(--soft); }
.button-small { min-height: 32px; padding: 6px 12px; font-size: 13px; }
.resource-links .resource-paper .btn-icon { fill: #b31b1b; }
.resource-links .resource-code .btn-icon { fill: #000; }
.resource-links .resource-post .btn-icon { fill: #000; }
.resource-links .btn-icon { width: 18px; height: 18px; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--link); outline-offset: 4px; }

/* A compact chapter index leaves the page, rather than a sidebar panel, in view. */
.blog-header { display: none; }
.blog-brand { display: inline-flex; align-items: center; color: var(--ink); font-size: 21px; font-weight: 650; letter-spacing: -.02em; }
.blog-brand:hover { text-decoration: none; }
.side-nav { position: fixed; top: clamp(140px, 22vh, 220px); left: 18px; bottom: auto; z-index: 40; width: 144px; display: flex; flex-direction: column; gap: 2px; padding: 0; border: 0; border-left: 1px solid var(--line); background: none; transform: none; }
.side-nav a[data-chapter] { display: block; padding: 8px 11px; margin-left: -1px; border-left: 2px solid transparent; border-radius: 0 3px 3px 0; color: #566152; font: 450 13px/1.5 var(--sans); white-space: nowrap; }
.side-nav a[data-chapter]:before, .side-nav a[data-chapter]:after { display: none; }
.side-nav a[data-chapter]:hover { background: #e8ece2; color: var(--ink); text-decoration: none; }
.side-nav a[aria-current="location"] { border-left-color: var(--link); background: var(--accent-soft); color: #284d39; font-weight: 600; }

/* The paper identity is compact; the result and its takeaway form one figure. */
.paper-hero { padding: 42px 0 44px; text-align: center; }
.paper-hero #paper-title { max-width: 1060px; margin: 0 auto; font: 650 40px/1.18 var(--sans); letter-spacing: -.025em; text-wrap: balance; }
.paper-hero .authors { margin: 28px auto 0; gap: 6px; max-width: 1040px; font-size: 16px; line-height: 1.55; }
.paper-hero .author-row { gap: 4px 36px; }
.paper-hero .authors sup { font-size: 10px; }
.paper-hero .affiliations { margin: 16px auto 0; max-width: 1040px; gap: 4px 30px; font-size: 14px; line-height: 1.6; color: #677061; }
.affiliation-note { flex-basis: auto; font-size: 13px; }
.paper-meta { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 18px 44px; margin: 26px auto 0; }
.paper-hero .venue { margin: 0; gap: 12px; font-size: 14px; font-weight: 450; color: #5b6758; }
.paper-hero .venue img { width: 84px; }
.paper-hero .hero-actions { margin: 0; gap: 12px; }
.paper-hero .hero-actions .button { min-width: 104px; padding: 10px 18px; font-size: 15px; }
.paper-hero .hero-deck { max-width: none; margin: 30px 0 0; padding: 17px 22px; border-left: 3px solid #557864; border-radius: 0 4px 4px 0; background: #eef2e9; text-align: left; font-size: 20px; line-height: 1.55; color: var(--ink); }
.hero-deck strong { font-weight: 650; }
.hero-film { position: relative; container-type: inline-size; margin: 18px 0 0; aspect-ratio: 16/9; border: 1px solid var(--line); border-radius: 5px; overflow: hidden; background: #eeeee7; }
.hero-film video { object-fit: contain; transform-origin: 0 0; transform: translate(var(--hero-pan-x, -25%), var(--hero-pan-y, -12.5%)) scale(var(--hero-zoom, 1.25)); }
.hero-caption-overlay { position: absolute; inset: 0; pointer-events: none; color: #fff; font-family: Arial, sans-serif; }
.hero-timed-caption { position: absolute; top: 4.444%; left: 5%; width: 90%; text-align: center; text-wrap: balance; font-size: clamp(11px, 3.3333cqw, 64px); font-weight: 700; line-height: 1.14; -webkit-text-stroke: .1042cqw rgba(15, 22, 18, .82); paint-order: stroke fill; text-shadow: 0 .1563cqw .1563cqw rgba(5, 12, 8, .82); }
.hero-timed-caption[data-title="true"] { white-space: pre-line; line-height: 1.25; }
.hero-speed-label { position: absolute; right: 5%; bottom: 8.889%; font-size: clamp(9px, 2.7083cqw, 52px); font-weight: 700; line-height: 1.15; text-shadow: 0 1px 3px rgba(5, 12, 8, .65); }
.film-control { right: 12px; bottom: 12px; border-radius: 4px; min-height: 32px; font-size: 13px; }
.hero-film .film-control { left: 12px; right: auto; }
.film-caption { margin-top: 12px; padding: 0; text-align: left; }
.film-caption p { max-width: none; font-size: 15px; line-height: 1.6; color: #65705e; }

/* The gallery is a figure, without a surrounding card or feature badges. */
.results-section { padding-top: 44px; }
.fact-chips { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; padding: 22px 0; margin: 24px 0 32px; border: 1px solid var(--line); border-width: 1px 0; background: #f5f5ef; }
.fact-chips li { display: flex; gap: 12px; min-width: 0; padding: 0 20px; }
.fact-chips li + li { border-left: 1px solid var(--line); }
.fact-icon { display: block; flex: 0 0 24px; margin-top: 2px; color: #557864; }
.fact-icon svg { width: 24px; height: 24px; }
.fact-text { display: block; }
.fact-text strong { display: block; font: 600 15px/1.5 var(--sans); }
.fact-text small { display: block; margin-top: 4px; font-size: 14px; line-height: 1.5; color: var(--muted); }
.results-guide { margin-bottom: 10px; font-size: 15px; }
.result-tabs { display: flex; flex-wrap: nowrap; gap: 4px; margin: 0 0 22px; padding: 5px; border: 1px solid var(--line); border-radius: 5px; background: #eeefe8; }
.result-tabs [role="tab"] { flex: 1 1 auto; margin: 0; padding: 10px 8px; min-height: 40px; border: 0; border-radius: 3px; font-size: 13px; font-weight: 500; color: #5a6554; }
.result-tabs [aria-selected="true"] { background: #35634f; color: #fff; font-weight: 600; }
.result-tabs [aria-selected="true"] .tab-count { color: #e6eee2; }
.gallery-heading h3 { margin: 0 0 16px; font: 600 19px/1.4 var(--sans); }
.result-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.result-card .video-frame { aspect-ratio: 16/9; border: 1px solid var(--line); border-radius: 4px; }
.result-card .video-frame video { object-fit: contain; }
.result-card figcaption { padding-top: 9px; gap: 0; align-items: baseline; }
.result-card figcaption > div { display: flex; flex-wrap: wrap; align-items: baseline; column-gap: 10px; row-gap: 0; min-width: 0; }
.result-card h4 { font: 600 16px/1.5 var(--sans); }
.result-card figcaption p { margin: 0; font: 400 14px/1.5 var(--sans); color: #65705e; }
.clip-index { display: none; }
.result-grid > .result-card:last-child:nth-child(odd) { grid-column: auto; width: auto; }

/* Short source descriptions and a quiet explanatory figure. */
.story-opening { margin-top: 0; max-width: var(--text-width); }
.story-opening p { text-wrap: balance; }
.story-opening .opening-lead { font: 400 18px/1.65 var(--sans); margin-bottom: 14px; }
.motivation-film { margin-top: 24px; overflow: hidden; border: 1px solid var(--line); border-radius: 5px; background: #fff; }
.motivation-film video { display: block; width: 100%; height: auto; aspect-ratio: 16/9; object-fit: contain; }
.section-bridge { max-width: none; margin-top: 26px; font-size: 17px; }
.challenge-section .section-bridge { padding: 18px 0 0; font-size: 20px; font-weight: 550; color: var(--ink); }

/* Optional applications sit directly beneath the solution statement. */
.applications { margin-top: 14px; }
.applications > summary { display: inline-flex; align-items: center; gap: 12px; min-height: 44px; padding: 6px 0; list-style: none; cursor: pointer; color: var(--ink); font: 500 16px/1.5 var(--sans); }
.applications > summary::-webkit-details-marker { display: none; }
.applications > summary:hover { text-decoration: underline; text-underline-offset: 4px; }
.applications > summary:focus-visible { outline: 2px solid var(--ink); outline-offset: 4px; border-radius: 2px; }
.applications-chevron { width: 8px; height: 8px; margin-top: -4px; border: solid currentColor; border-width: 0 1.5px 1.5px 0; transform: rotate(45deg); }
.applications[open] > summary .applications-chevron { margin-top: 4px; transform: rotate(225deg); }
.applications-content { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--grid-gap); margin-top: 18px; padding-top: 24px; border-top: 1px solid var(--line); }
.application-example { min-width: 0; margin: 0; }
.application-heading { margin-bottom: 14px; }
.application-heading h3 { margin: 0; font: 600 clamp(17px, 2.2vw, 21px)/1.4 var(--sans); }
.application-heading p { margin: 4px 0 0; color: var(--muted); font-size: 15px; line-height: 1.5; }
.application-video { border: 1px solid var(--line); border-radius: 4px; background: #fff; }
.application-video video { display: block; width: 100%; height: 100%; object-fit: contain; }
@media (max-width: 767px) {
  .applications-content { grid-template-columns: 1fr; gap: 30px; }
  .application-video-stairs { aspect-ratio: 2/1; }
}

/* Counterfactual examples and the exact prompt read as part of the article. */
.model-roles { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 36px; margin: 24px 0 32px; }
.model-roles > div { padding-left: 18px; border-left: 3px solid #cdd5c6; }
.model-roles > div:last-child { border-left-color: #557864; }
.model-roles h3 { margin: 0 0 8px; font: 600 19px/1.4 var(--sans); }
.model-roles p { margin: 0; font-size: 16px; line-height: 1.65; }
.generation-heading { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; margin: 0 0 12px; font-size: 16px; font-weight: 600; color: var(--ink); }
.generation-heading > span:last-child { grid-column: 2 / -1; }
.generation-flow { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; align-items: start; }
.seed-card, .generated-cards figure { min-width: 0; }
.seed-card { grid-column: 1; grid-row: 1; }
.generated-cards { display: contents; }
.generation-flow video { width: 100%; height: auto; aspect-ratio: 16/9; object-fit: contain; border: 1px solid #d5dcd0; border-radius: 4px; }
.seed-card video { border-color: #829d81; }
.seed-card figcaption, .generated-cards figcaption { padding-top: 8px; font-size: 14px; line-height: 1.5; color: #53604c; }
.seed-card figcaption span, .generated-cards figcaption span { display: none; }
.generation-arrow { grid-column: 1; grid-row: 1; align-self: start; aspect-ratio: 16/9; display: flex; align-items: center; justify-content: flex-end; transform: translateX(17px); color: #737d6b; font-size: 16px; }
.solution-notes { margin-top: 28px; border-top: 1px solid var(--line); }
.solution-notes > div { display: grid; grid-template-columns: 210px minmax(0, 1fr); align-items: baseline; gap: 24px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.solution-notes > div:first-child p { text-wrap: balance; }
.solution-notes h3 { margin: 0; font: 600 18px/1.5 var(--sans); }
.solution-notes p { margin: 0; font: 400 16px/1.65 var(--sans); }
.generation-prompt { margin: 0; padding: 16px 20px; border: 1px solid #d8dfd0; border-radius: 4px; background: #f1f3eb; }
.solution-notes .generation-prompt p { font: 400 14px/1.65 var(--mono); overflow-wrap: anywhere; }
.solution-notes .generation-prompt p + p { margin-top: 10px; }
.generation-prompt mark { padding: 0; background: none; color: inherit; font-weight: 600; }
.solution-notes .prompt-key { margin-top: 8px; font-size: 13px; color: #65705e; }
.prompt-key code { font: inherit; }
.multiply { margin-top: 30px; }
.multiply-stage { border: 1px solid var(--line); border-radius: 5px; }
.multiply-overlay { border-radius: 2px; font-family: var(--sans); }
.multiply-foot { margin-top: 8px; }
.multiply-steps { display: grid; grid-template-columns: 1fr 1fr 1fr 1.3fr 1.2fr 1.2fr; gap: 16px; overflow: visible; }
.multiply-step { min-height: 58px; font-size: 14px; text-align: center; white-space: normal; line-height: 1.4; font-weight: 500; }
.multiply-step[aria-pressed="true"] { border-bottom-color: #35634f; color: #35634f; font-weight: 650; }

/* Three preparation steps followed by the paired eight-second results. */
.method-intro { max-width: none; margin: 0 0 26px; }
.method-intro p { font-size: 16px; }
.method-intro p + p { margin-top: 10px; }
.method-demonstrations { --grid-gap: 28px; scroll-margin-top: 20px; }
.pipeline { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--grid-gap); align-items: start; }
.pipeline-step { grid-row: 1; }
.pipeline-step:nth-of-type(1) { grid-column: 1; }
.pipeline-step:nth-of-type(2) { grid-column: 2; }
.pipeline-step:nth-of-type(3) { grid-column: 3; }
.pipeline-step, .pipeline-arrow { opacity: 1; transform: none; transition: none; }
.pipeline-frame { aspect-ratio: 1/1; border: 1px solid var(--line); border-radius: 4px; background: #f2f3ed; }
.pipeline-frame video { object-fit: cover; object-position: center; }
.pipeline-step:first-child video { object-position: 50% 71%; transform: scale(-1.14, 1.14); transform-origin: 50% 80%; }
.pipeline-step figcaption, .method-deployment-step figcaption { margin: 0 0 16px; text-align: center; }
.method-demonstrations h3 { margin: 0; font: 600 20px/1.4 var(--sans); letter-spacing: -.015em; }
.method-demonstrations .method-entry-heading { position: relative; }
.method-entry-arrow { position: absolute; left: 0; top: 0; color: #737d6b; font-size: 20px; font-weight: 400; line-height: inherit; }
.pipeline .pipeline-arrow, .pipeline.is-in .pipeline-arrow { grid-row: 1; align-self: start; aspect-ratio: auto; display: flex; align-items: center; justify-content: flex-end; margin: 0; font-size: 20px; line-height: 27px; color: #737d6b; transform: translateX(calc(var(--grid-gap)/2 + .5em)); }
.pipeline-arrow:nth-child(2) { grid-column: 1; }
.pipeline-arrow:nth-child(4) { grid-column: 2; }
.method-deployment { position: relative; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--grid-gap); margin-top: 28px; scroll-margin-top: 20px; }
.method-deployment-step { min-width: 0; }
.method-deployment-frame { aspect-ratio: 16/9; overflow: hidden; border: 1px solid var(--line); border-radius: 4px; }
.method-deployment-frame video { width: 100%; height: 100%; object-fit: contain; }
.method-deployment-arrow { position: absolute; left: 50%; top: 0; transform: translateX(-50%); font-size: 20px; line-height: 27px; color: #737d6b; }
.method-figure { margin-top: 32px; padding: 0; border: 0; border-radius: 0; background: none; }
.method-figure img { width: 100%; height: auto; padding: 0; border: 0; border-radius: 0; }
.method-return { display: inline-block; margin-top: 18px; color: var(--link); font-size: 15px; }
.closing-notes, .closing-notes + .closing-notes { padding: 38px 0 42px; border: 0; border-top: 1px solid var(--line); }
/* Full-width paper figures keep plot labels and contact-force annotations readable. */
.paper-result { margin: 32px 0 0; }
.paper-result + .paper-result { margin-top: 40px; padding-top: 32px; border-top: 1px solid var(--line); }
.paper-result figcaption { margin: 0 0 18px; }
.paper-result h3 { margin: 0 0 8px; font: 600 21px/1.4 var(--sans); }
.paper-result p { margin: 0; max-width: none; font-size: 16px; line-height: 1.65; text-wrap: balance; }
.paper-result p + p { margin-top: 12px; }
.paper-result strong { font-weight: 600; color: var(--ink); }
.paper-result-image { display: block; overflow: hidden; border: 1px solid var(--line); border-radius: 4px; background: #fff; cursor: zoom-in; }
.paper-result-image img { display: block; width: 100%; height: auto; }

.closing-notes .section-title { font-size: 28px; }
.citation-intro { margin: 0 0 16px; font-size: 16px; }
.citation-block pre { margin: 0; padding: 22px; border: 1px solid var(--line); border-radius: 4px; background: #f1f3ec; font-size: 13px; line-height: 1.7; }
.ack-block { width: 100%; max-width: none; }
.ack-block p { font-size: 16px; line-height: 1.75; }
.blog-footer { display: flex; justify-content: space-between; align-items: center; padding: 24px 0 32px; margin-top: 24px; border-top: 1px solid #dbdfd6; font-size: 13px; color: #65705e; }
.blog-footer .blog-brand { font-size: 16px; }
.video-dialog, .video-dialog video { border-radius: 3px; }

/* One synchronized SMPL comparison with short source captions. */
.agents-intro { margin-top: 0; }
.agents-smpl-figure { margin: 24px 0 0; }
.agents-smpl-frame { aspect-ratio: 40/13; border: 1px solid var(--line); border-radius: 4px; }
.agents-smpl-frame video { display: block; width: 100%; height: 100%; object-fit: contain; }
.agents-source-notes { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--grid-gap); padding-top: 16px; }
.agents-source-notes p { margin: 0; font-size: 15px; line-height: 1.65; }
.agents-source-notes strong { color: var(--ink); font-weight: 600; }
.agents-smpl-figure .agents-video-controls { margin-top: 16px; }
.agents-comparison-heading { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px 24px; margin: 28px 0 20px; }
.agents-comparison-heading h3 { margin: 0; font: 600 21px/1.4 var(--sans); }
.agents-video-controls { display: flex; align-items: center; gap: 8px; }
.agents-video-controls > span { margin-left: 4px; font-size: 13px; color: var(--muted); }
.agents-motion-figure, .agents-motion-panel { margin: 0; }
.agents-motion-pair { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--grid-gap); }
.agents-motion-panel { min-width: 0; }
.agents-motion-panel h4 { margin: 0 0 10px; font: 600 18px/1.4 var(--sans); }
.agents-motion-panel .video-frame { aspect-ratio: 16/9; border: 1px solid var(--line); border-radius: 4px; }
.agents-motion-panel video { width: 100%; height: 100%; object-fit: contain; }
.agents-motion-panel figcaption { padding-top: 12px; font-size: 15px; line-height: 1.6; }
.agents-motion-panel figcaption strong { color: var(--ink); font-weight: 600; }
.agents-replay-note { margin-top: 18px; max-width: var(--text-width); color: var(--muted); font-size: 13px; line-height: 1.65; }
.agents-takeaway { margin-top: 24px; padding-left: 18px; border-left: 3px solid #557864; }

@media (min-width: 1180px) {
  .section-title, .story-title { position: relative; display: block; }
  .chapter-number { position: absolute; right: calc(100% + 10px); top: 8px; }
}
@media (max-width: 1179px) {
  body { padding-left: 0; }
  main { width: calc(100% - 64px); }
  .side-nav { display: none; }
  .blog-header { position: sticky; top: 0; z-index: 40; height: 48px; display: flex; align-items: center; justify-content: center; padding: 0 32px; border-bottom: 1px solid var(--line); background: var(--bg); }
  .blog-header nav { display: flex; align-items: center; justify-content: center; gap: 26px; font-size: 14px; }
  .blog-header nav a { padding: 10px 0; color: #566152; white-space: nowrap; }
  .blog-header nav a[aria-current="location"] { color: var(--link); text-decoration: underline; text-underline-offset: 6px; }

  .paper-hero #paper-title { font-size: 34px; }
  .result-tabs { gap: 3px; }
  .result-tabs [role="tab"] { font-size: 12px; }
}
@media (max-width: 760px) {
  body { font-size: 16px; }
  main { width: calc(100% - 36px); }
  .blog-header { height: 44px; min-height: 44px; padding: 0 12px; }
  .blog-brand { font-size: 16px; }
  .blog-header nav { width: 100%; justify-content: space-between; gap: 12px; font-size: 12px; overflow-x: auto; }
  .paper-hero { padding-top: 28px; }
  .paper-hero #paper-title { font-size: clamp(25px, 4.5vw, 32px); line-height: 1.25; margin-top: 0; }
  .paper-hero .authors { font-size: 14px; margin-top: 20px; }
  .paper-hero .author-row { gap: 4px 16px; }
  .paper-hero .co-lead-authors:nth-of-type(3) { display: grid; grid-template-columns: repeat(2, max-content); }
  .paper-hero .affiliations { font-size: 12px; gap: 3px 13px; }
  .affiliation-note { font-size: 11px; }
  .paper-hero .venue { font-size: 12px; gap: 10px; margin: 0; }
  .paper-hero .venue img { width: 65px; }
  .paper-hero .hero-actions { gap: 8px; margin: 0; }
  .paper-hero .hero-actions .button { min-width: 0; padding: 7px 12px; font-size: 13px; }
  .paper-meta { gap: 14px; margin-top: 20px; }
  .button { padding: 7px 12px; font-size: 13px; }
  .paper-hero .hero-deck { margin-top: 24px; padding: 14px 16px; font-size: 16px; text-wrap: balance; }
  .film-caption p { font-size: 13px; }
  .section-space { padding: 36px 0; }
  .section-title, .story-title { gap: 12px; font-size: 26px; }
  .chapter-number { font-size: 16px; }
  .section-intro, .article-copy { font-size: 16px; }
  .keep-words { white-space: normal; }
  .fact-chips { grid-template-columns: 1fr; gap: 18px; padding: 20px 16px; margin: 20px 0 24px; }
  .fact-chips li { padding: 0; }
  .fact-chips li + li { border: 0; }
  .fact-text strong { font-size: 14px; }
  .fact-text small { font-size: 13px; }
  .result-tabs { flex-wrap: nowrap; gap: 4px; overflow-x: auto; }
  .result-tabs [role="tab"] { font-size: 13px; }
  .result-grid { grid-template-columns: 1fr; gap: 22px; }
  .result-card figcaption p { font-size: 13px; }
  .challenge-section .section-bridge { font-size: 18px; }
  .model-roles { grid-template-columns: 1fr; gap: 20px; }
  .generation-heading { display: none; }
  .generation-flow { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px 16px; }
  .generation-arrow { display: none; }
  .seed-card figcaption, .generated-cards figcaption { font-size: 13px; }
  .seed-card figcaption span, .generated-cards figcaption span { display: block; margin-bottom: 2px; font-size: 13px; font-weight: 600; color: var(--ink); }
  .solution-notes > div { grid-template-columns: 1fr; gap: 8px; padding: 16px 0; }
  .solution-notes p { font-size: 15px; }
  .generation-prompt { padding: 12px 14px; }
  .solution-notes .generation-prompt p { font-size: 12px; }
  .multiply-steps { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0 14px; border: 0; }
  .multiply-step { font-size: 12px; min-height: 54px; border-bottom: 1px solid #dbdfd6; }
  .pipeline { grid-template-columns: 1fr; gap: 18px; }
  .pipeline-step:nth-of-type(n) { grid-column: 1; grid-row: auto; }
  .pipeline .pipeline-arrow, .pipeline.is-in .pipeline-arrow { grid-column: 1; grid-row: auto; justify-content: center; transform: rotate(90deg); }
  .pipeline-frame { aspect-ratio: 1/1; }
  .method-deployment { grid-template-columns: 1fr; gap: 18px; }
  .method-deployment-arrow { position: static; justify-self: center; transform: rotate(90deg); }
  .method-demonstrations h3 { font-size: 18px; }
  .paper-result h3 { font-size: 19px; }
  .paper-result p { font-size: 15px; }
  .agents-motion-pair { grid-template-columns: 1fr; gap: 24px; }
  .agents-source-notes { grid-template-columns: 1fr; gap: 12px; }
  .agents-comparison-heading h3 { font-size: 19px; }
  .agents-motion-panel h4 { font-size: 17px; }
  .citation-block pre { padding: 14px; font-size: 11px; }
  .ack-block p { font-size: 15px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}