:root{--ink:#171923;--muted:#626979;--line:#dfe3eb;--paper:#fbfbfd;--panel:#f0f2f8;--violet:#6552e8;--cyan:#0e9f9a;--lime:#c8f06a;--radius:22px;--shadow:0 18px 50px rgba(37,40,61,.10)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:"DM Sans",sans-serif;line-height:1.65}.shell{width:min(1120px,calc(100% - 40px));margin-inline:auto}.skip-link{position:fixed;left:16px;top:-60px;z-index:99;background:var(--ink);color:#fff;padding:10px 16px;border-radius:10px}.skip-link:focus{top:16px}.site-header{position:sticky;top:0;z-index:20;background:rgba(251,251,253,.84);border-bottom:1px solid rgba(223,227,235,.75);backdrop-filter:blur(14px)}.nav{height:68px;display:flex;align-items:center;justify-content:space-between}.wordmark{color:var(--ink);font-family:Manrope,sans-serif;font-weight:800;text-decoration:none;letter-spacing:-.03em}.wordmark span{display:inline-grid;place-items:center;width:28px;height:28px;margin-right:8px;background:var(--ink);color:var(--lime);border-radius:8px}.nav-links{display:flex;gap:28px}.nav-links a{color:#4b5060;text-decoration:none;font-size:.92rem;font-weight:600}.nav-links a:hover{color:var(--violet)}.nav-toggle{display:none;border:0;background:none;font:inherit;font-weight:700}.hero{text-align:center;padding:92px 0 62px}.eyebrow,.kicker{text-transform:uppercase;letter-spacing:.14em;font-size:.76rem;font-weight:800;color:var(--violet)}.status-dot{display:inline-block;width:8px;height:8px;margin-right:8px;border-radius:50%;background:var(--cyan);box-shadow:0 0 0 5px rgba(14,159,154,.12)}h1,h2,h3{font-family:Manrope,sans-serif;line-height:1.14;margin-top:0}h1{max-width:1020px;margin:20px auto;font-size:clamp(2.45rem,5.8vw,5.2rem);letter-spacing:-.055em}h1>span{color:var(--violet)}.dek{max-width:790px;margin:0 auto;color:var(--muted);font-size:clamp(1.05rem,2vw,1.3rem)}.authors{font-weight:700;margin:27px 0 18px}.action-row{display:flex;justify-content:center;flex-wrap:wrap;gap:10px}.pill{display:inline-flex;align-items:center;gap:8px;padding:10px 17px;border:1px solid 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.media-placeholder{z-index:1}.media-placeholder span{font-weight:800;letter-spacing:.16em;color:var(--violet);font-size:.74rem}.media-placeholder strong{font:700 clamp(1.3rem,3vw,2.4rem)/1.2 Manrope;margin:10px 0}.media-placeholder small,.asset-note{color:var(--muted);font-family:monospace}.caption{max-width:920px;margin:18px auto 0;text-align:center;color:var(--muted)}.section{padding:110px 0}.section-heading{max-width:760px;margin-bottom:48px}.section-heading--center{text-align:center;margin-inline:auto}.section-heading h2{font-size:clamp(2rem,4.4vw,3.8rem);letter-spacing:-.045em;margin:10px 0}.section-heading>p:last-child{color:var(--muted);font-size:1.08rem}.overview-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:90px}.lead{font:600 clamp(1.35rem,2.5vw,2rem)/1.45 Manrope;margin:0}.challenge-list{display:grid;gap:24px}.challenge-list article{display:grid;grid-template-columns:48px 1fr;gap:15px;padding-bottom:24px;border-bottom:1px solid var(--line)}.challenge-list span{color:var(--violet);font-weight:800}.challenge-list h3{margin:0 0 6px;font-size:1.12rem}.challenge-list p{margin:0;color:var(--muted)}.method-section{background:#171923;color:#f8f8fb}.method-section .section-heading>p:last-child{color:#aeb4c2}.where{color:#9d90ff}.how{color:#48d2ca}.factor-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}.factor-card{padding:34px;border:1px solid #373a4a;border-radius:var(--radius);background:#20232e}.factor-card--where{border-top-color:#8675ff}.factor-card--how{border-top-color:#38c9c1}.factor-index{font-size:.74rem;letter-spacing:.14em;font-weight:800;color:#9d90ff}.factor-card--how .factor-index{color:#48d2ca}.factor-card h3{font-size:1.55rem;margin:18px 0 9px}.factor-card p,.factor-card li{color:#bbc0cd}.factor-card ul{padding-left:20px;margin-bottom:0}.video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.video-card{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff}.video-shell{position:relative;aspect-ratio:4/3;background:#242735;overflow:hidden}.video-shell video,.comparison-cell video{width:100%;height:100%;object-fit:cover}.video-fallback{position:absolute;inset:0;display:grid;place-content:center;text-align:center;color:#fff;background:linear-gradient(145deg,#292b3a,#3c376c)}.video-fallback span{font:700 1.2rem Manrope}.video-fallback small{font-family:monospace;color:#c8cad5;padding:8px 14px}.video-shell.has-video .video-fallback{display:none}.video-control{position:absolute;right:14px;bottom:14px;border:0;border-radius:999px;padding:8px 13px;background:rgba(255,255,255,.92);font-weight:800;cursor:pointer}.video-copy{padding:22px}.video-copy h3{margin-bottom:6px}.video-copy p{margin:0;color:var(--muted);font-size:.93rem}.comparison-section{background:#eef0f6}.section-heading--split{max-width:none;display:grid;grid-template-columns:1.2fr .8fr;align-items:end;gap:80px}.comparison{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}.comparison-label,.comparison-row{display:grid;grid-template-columns:repeat(3,1fr)}.comparison-label span{padding:12px 18px;font-size:.8rem;text-transform:uppercase;letter-spacing:.1em;font-weight:800;border-right:1px solid var(--line)}.comparison-label .ours-label{background:#dedafa;color:#4d3ec3}.comparison-cell{position:relative;min-width:0;aspect-ratio:4/3;border-right:1px solid var(--line);background:#292c39;overflow:hidden}.comparison-cell img{width:100%;height:100%;object-fit:cover}.ours-cell{outline:3px solid var(--violet);outline-offset:-3px}.asset-note{position:absolute;left:10px;bottom:10px;max-width:calc(100% - 20px);padding:5px 8px;border-radius:7px;background:rgba(255,255,255,.88);font-size:.68rem;overflow:hidden;text-overflow:ellipsis}.code-wrap{position:relative;background:#171923;border-radius:18px;color:#e6e8ef;overflow:auto}.code-wrap pre{margin:0;padding:30px;font-size:.88rem;line-height:1.7}.copy-button{position:absolute;right:14px;top:14px;border:1px solid #494d5b;background:#2a2d38;color:#fff;border-radius:9px;padding:7px 12px;cursor:pointer}footer{border-top:1px solid var(--line);padding:30px 0;color:var(--muted)}footer .shell{display:flex;justify-content:space-between}footer p{margin:0}footer a{color:var(--ink);font-weight:700;text-decoration:none}.reveal{opacity:0;transform:translateY(18px);transition:opacity .65s ease,transform .65s ease}.reveal.is-visible{opacity:1;transform:none}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.pdf-frame{background:#fff}.pdf-frame object{display:block;width:100%;height:100%;border:0}.pdf-frame object p{padding:28px;text-align:center}.project-video{overflow:hidden;padding:10px;border:1px solid var(--line);border-radius:var(--radius);background:#fff;box-shadow:var(--shadow)}.project-video video{display:block;width:100%;max-height:680px;border-radius:15px;background:#141620}.comparison-carousel{padding:24px;border:1px solid var(--line);border-radius:calc(var(--radius) + 6px);background:#fff;box-shadow:var(--shadow)}.comparison-toolbar{display:grid;grid-template-columns:52px 1fr 52px;align-items:center;gap:18px;margin-bottom:22px}.carousel-button{display:grid;place-items:center;width:52px;height:52px;border:1px solid var(--line);border-radius:50%;background:#fff;color:var(--ink);font-size:1.5rem;cursor:pointer;transition:.2s}.carousel-button:hover{border-color:var(--violet);background:#f0edff;color:var(--violet);transform:translateY(-1px)}.prompt-block{text-align:center}.prompt-block span{display:block;color:var(--violet);font-size:.72rem;font-weight:800;letter-spacing:.14em;text-transform:uppercase}.prompt-block p{margin:4px 0 0;font:600 clamp(1rem,2vw,1.3rem)/1.45 Manrope}.comparison{box-shadow:none}.comparison-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.comparison-item{min-width:0;margin:0}.comparison-cell{border:0;border-radius:14px;aspect-ratio:4/3}.comparison-cell video{display:block;width:100%;height:100%;object-fit:cover;background:#20232e}.comparison-item figcaption{padding:12px 8px 4px;text-align:center;font:700 1rem Manrope}.ours-item figcaption{color:var(--violet)}.ours-item .comparison-cell{outline:3px solid var(--violet);outline-offset:-3px}.carousel-status{display:flex;justify-content:space-between;margin-top:14px;color:var(--muted);font-size:.8rem;font-family:monospace}.carousel-dots{display:flex;justify-content:center;gap:8px;margin-top:16px}.carousel-dot{width:8px;height:8px;padding:0;border:0;border-radius:50%;background:#c9cdd8;cursor:pointer}.carousel-dot.is-active{width:24px;border-radius:999px;background:var(--violet)}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.reveal{opacity:1;transform:none;transition:none}.pill,.carousel-button{transition:none}}
@media (max-width:800px){.nav-toggle{display:block}.nav-links{display:none;position:absolute;top:68px;left:20px;right:20px;padding:18px;flex-direction:column;gap:12px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow)}.nav-links.is-open{display:flex}.hero{padding-top:70px}.overview-grid,.factor-grid,.section-heading--split{grid-template-columns:1fr;gap:34px}.video-grid{grid-template-columns:1fr}.section{padding:78px 0}.comparison{overflow:visible}.comparison-row{grid-template-columns:1fr;gap:18px}.comparison-toolbar{grid-template-columns:44px 1fr 44px}.carousel-button{width:44px;height:44px}.pdf-frame{aspect-ratio:4/3}.comparison-carousel{padding:16px}}
@media (max-width:520px){.shell{width:min(100% - 24px,1120px)}.hero{padding-top:54px}h1{font-size:2.35rem}.media-frame--hero{aspect-ratio:4/3}.action-row{gap:8px}.pill{padding:9px 13px}.section{padding:64px 0}.factor-card{padding:25px}footer .shell{display:block}footer a{display:inline-block;margin-top:8px}}

/* Academic paper layout */
[id]{scroll-margin-top:92px}.side-nav{position:fixed;left:28px;top:50%;z-index:15;display:flex;flex-direction:column;gap:5px;width:132px;transform:translateY(-42%)}.side-nav::before{content:"";position:absolute;left:15px;top:14px;bottom:14px;width:1px;background:var(--line)}.side-nav a{position:relative;display:grid;grid-template-columns:31px 1fr;align-items:center;gap:8px;padding:7px 0;color:#858b99;font-size:.74rem;font-weight:700;text-decoration:none;transition:color .2s}.side-nav a span{position:relative;display:grid;place-items:center;width:31px;height:22px;background:var(--paper);font:600 .62rem Manrope}.side-nav a:hover,.side-nav a.is-active{color:var(--violet)}.side-nav a.is-active span::after{content:"";position:absolute;width:7px;height:7px;border:2px solid var(--paper);border-radius:50%;background:var(--violet);box-shadow:0 0 0 1px var(--violet)}.paper-section{max-width:1040px}.video-section{background:#f1f3f8}.academic-heading{max-width:920px;display:grid;grid-template-columns:54px 1fr;gap:20px;align-items:start}.academic-heading .section-number{margin:7px 0 0;padding-top:7px;border-top:2px solid currentColor;color:#a4a9b4;font:700 .74rem Manrope}.academic-heading h2{font-size:clamp(1.9rem,3.6vw,3.2rem);letter-spacing:-.035em}.academic-heading--dark .section-number{color:#6f7483}.abstract-copy{max-width:900px;margin:0 auto 48px;font-size:1.08rem;line-height:1.78}.abstract-copy p:first-child{font:600 clamp(1.2rem,2vw,1.48rem)/1.6 Manrope;color:#303443}.abstract-copy strong{color:var(--violet)}.motivation-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:86px}.motivation-statement{padding-left:24px;border-left:3px solid var(--violet)}.motivation-statement p{margin:0;font:600 clamp(1.25rem,2.2vw,1.7rem)/1.5 Manrope}.evidence-list{display:grid;gap:24px}.evidence-list article{display:grid;grid-template-columns:42px 1fr;gap:16px;padding-bottom:22px;border-bottom:1px solid var(--line)}.evidence-list article>span{display:grid;place-items:center;width:34px;height:34px;border:1px solid var(--line);border-radius:50%;color:var(--violet);font-weight:800}.evidence-list h3{margin:2px 0 5px;font-size:1.08rem}.evidence-list p{margin:0;color:var(--muted)}.method-section .academic-heading{max-width:960px}.method-section .academic-heading h2{max-width:850px}.comparison-section .academic-heading{margin-bottom:42px}.comparison-section .academic-heading>div>p:last-child{color:var(--muted)}
@media (min-width:1500px){.shell{width:min(1160px,calc(100% - 80px))}}
@media (max-width:960px){.side-nav{display:none}}
@media (max-width:800px){[id]{scroll-margin-top:78px}.academic-heading{grid-template-columns:38px 1fr;gap:12px}.academic-heading .section-number{font-size:.66rem}.motivation-grid{grid-template-columns:1fr;gap:42px}.abstract-copy{font-size:1rem}.video-section{background:#f3f4f8}}

/* Compact academic hierarchy */
body{font-size:1rem}.hero{padding:72px 0 54px}.section{padding:84px 0}[id]{scroll-margin-top:24px}.academic-heading{display:block;max-width:900px;margin-bottom:28px}.academic-heading h2,.section-heading h2{margin:0;font-size:clamp(1.45rem,2vw,1.8rem);font-weight:700;letter-spacing:-.018em;line-height:1.3}.academic-heading>p{max-width:760px;margin:8px 0 0;color:var(--muted);font-size:1rem}.abstract-copy{max-width:900px;margin:0 auto 42px;font-size:1.03rem;line-height:1.78}.abstract-copy p:first-child{font:inherit;color:inherit}.abstract-copy strong{color:inherit}.motivation-statement p{font:500 1.12rem/1.68 "DM Sans",sans-serif}.side-nav{left:20px;top:50%;width:122px;transform:translateY(-50%)}
.png-frame{aspect-ratio:auto;margin-inline:auto;background:#fff}.png-frame img{display:block;width:100%;height:auto;max-width:100%;object-fit:contain}.teaser-frame{width:min(100%,1000px)}.framework-frame{width:min(100%,1120px);margin-top:36px;margin-bottom:40px}.method-section .png-frame{border-color:#363946}
@media (min-width:961px) and (max-width:1499px){.shell{width:min(1080px,calc(100% - 230px));margin-left:170px;margin-right:60px}}
@media (max-width:960px){.hero{padding-top:54px}.section{padding:68px 0}.academic-heading h2,.section-heading h2{font-size:1.45rem}}

.author-block{margin:24px auto 22px;text-align:center}.author-list{display:flex;flex-wrap:wrap;justify-content:center;gap:.3rem .45rem;margin:0;font:600 clamp(1rem,1.5vw,1.15rem)/1.55 "DM Sans",sans-serif}.author-list span:not(:last-child)::after{content:","}.author-list sup,.affiliation-list sup{font-size:.65em;vertical-align:super}.author-list sup{margin-left:.12em}.affiliation-list{margin:5px 0 0;color:var(--muted);font-size:.94rem}.affiliation-list sup{margin-right:.28em}.affiliation-list a{color:inherit;text-decoration:none;border-bottom:1px solid var(--line)}.affiliation-list a:hover,.affiliation-list a:focus-visible{color:var(--violet);border-bottom-color:var(--violet)}

/* Ours: synchronized affordance / normal comparison */
.affordance-compare{--affordance-split:50%;isolation:isolate}.compare-video{position:absolute;inset:0;display:block;width:100%;height:100%;object-fit:cover}.compare-video--normal{z-index:1}.affordance-layer{position:absolute;inset:0;z-index:2;overflow:hidden;clip-path:inset(0 calc(100% - var(--affordance-split)) 0 0);pointer-events:none}.compare-video--affordance{width:100%;max-width:none}.compare-divider{position:absolute;z-index:5;top:0;bottom:0;left:var(--affordance-split);width:32px;border:0;padding:0;background:transparent;transform:translateX(-50%);cursor:ew-resize;touch-action:none}.compare-divider::before{content:"";position:absolute;top:0;bottom:0;left:50%;width:2px;background:rgba(255,255,255,.95);box-shadow:0 0 0 1px rgba(20,22,31,.28),0 0 12px rgba(20,22,31,.35);transform:translateX(-50%)}.compare-divider span{position:absolute;left:50%;top:50%;display:grid;place-items:center;width:30px;height:30px;border:1px solid rgba(20,22,31,.2);border-radius:50%;background:rgba(255,255,255,.94);color:var(--violet);font:700 .9rem Manrope;box-shadow:0 3px 12px rgba(20,22,31,.22);transform:translate(-50%,-50%);transition:transform .15s ease,box-shadow .15s ease}.compare-divider:hover span,.compare-divider:focus-visible span,.compare-divider.is-dragging span{box-shadow:0 4px 16px rgba(20,22,31,.38);transform:translate(-50%,-50%) scale(1.08)}.compare-divider:focus-visible{outline:2px solid #fff;outline-offset:-3px}.compare-view-label{position:absolute;z-index:6;top:10px;padding:4px 8px;border:1px solid rgba(255,255,255,.28);border-radius:6px;background:rgba(20,22,31,.66);color:#fff;font:700 .62rem Manrope;letter-spacing:.08em;text-transform:uppercase;cursor:pointer}.compare-view-label:hover,.compare-view-label:focus-visible{background:rgba(77,62,195,.9);border-color:#fff}.compare-view-label:focus-visible{outline:2px solid #fff;outline-offset:2px}.compare-view-label--affordance{left:10px}.compare-view-label--normal{right:10px}.affordance-control{position:absolute;z-index:5;left:12px;right:12px;bottom:10px;display:grid;grid-template-columns:auto 1fr;align-items:center;gap:9px;padding:6px 9px;border:1px solid rgba(255,255,255,.42);border-radius:9px;background:rgba(20,22,31,.70);backdrop-filter:blur(5px)}.affordance-control label{color:#fff;font:700 .68rem Manrope;white-space:nowrap}.affordance-control input{width:100%;height:18px;margin:0;accent-color:#8ce1dd;cursor:ew-resize}.affordance-control input:focus-visible{outline:2px solid #fff;outline-offset:2px}
@media (max-width:520px){.affordance-control{grid-template-columns:1fr;gap:2px}.affordance-control label{text-align:center}.compare-divider span{width:26px;height:26px}}

/* Aligned method metadata below the comparison videos */
.comparison-item figcaption{display:grid;grid-template-rows:auto 38px;align-items:center;gap:7px;min-height:78px;padding:12px 6px 3px}.comparison-item figcaption>span{line-height:1.25}.comparison-item figcaption cite{display:grid;place-items:center;height:38px;padding:0 10px;border:1px solid var(--line);border-radius:9px;background:#f7f8fb;color:var(--muted);font:500 .72rem/1.25 "DM Sans",sans-serif}.ours-item figcaption{color:var(--violet)}.affordance-control{position:static;display:grid;grid-template-columns:auto minmax(70px,1fr);align-items:center;gap:9px;height:38px;padding:5px 9px;border:1px solid #cbc5f7;border-radius:9px;background:#f4f2ff;backdrop-filter:none}.affordance-control label{color:#4d3ec3;font:700 .68rem Manrope;white-space:nowrap}.affordance-control input{width:100%;height:18px;margin:0;accent-color:var(--violet);cursor:ew-resize}.affordance-control input:focus-visible{outline:2px solid var(--violet);outline-offset:2px}
@media (max-width:520px){.affordance-control{grid-template-columns:auto minmax(90px,1fr);gap:8px}.affordance-control label{text-align:left}}
.compare-view-label[aria-pressed="true"]{background:rgba(77,62,195,.9);border-color:#fff}
.affordance-explanation{max-width:900px;margin:18px auto 0;padding:12px 16px;border-left:3px solid var(--violet);background:#f7f6ff;color:var(--muted);font-size:.9rem;line-height:1.55}.affordance-explanation strong{color:var(--ink)}
.carousel-status{justify-content:flex-end}

.citation-section{background:#f1f3f8;padding-top:72px}
.citation-section .section-heading{margin-bottom:22px}
.citation-code{max-width:920px}
.citation-code pre{white-space:pre-wrap;overflow-wrap:anywhere;padding-right:96px}
.citation-code code{font-family:"SFMono-Regular",Consolas,"Liberation Mono",monospace}
@media (max-width:520px){.citation-code pre{padding-top:58px;padding-right:18px}.citation-code .copy-button{top:14px;right:14px}}