/* ==========================================================================
   DreamX project page
   ========================================================================== */
:root{
  --accent:#8CAB24;
  --accent-dark:#5F7A0E;
  --accent-soft:#C6DD5B;
  --accent-bg:#F5F8EA;
  --tok-v:#BCCC86;        /* video token   */
  --tok-q:#EBC96E;        /* latent/query  */
  --tok-a:#AAC1E8;        /* action token  */
  --tok-t:#8E8E8E;        /* text token    */
  --tok-o:#EE9A5E;        /* target frame  */
  --human:#E0A93B;
  --robot:#6C8FD6;
  --ink:#1B1F14;
  --muted:#5E6553;
  --line:#E2E7D5;
  --surface:#FAFBF6;
  --bg:#FFFFFF;
  --card:#FFFFFF;
  --on-ink:#FFFFFF;
  /* figure tokens */
  --fig-white:#FFFFFF;
  --fig-panel:#F7F7F7;
  --fig-text:#222222;
  --fig-cosmos:#F0F2EB;
  --fig-cosmos-in:#D5DEB8;
  --fig-lora:#F1F4E6;
  --fig-lora-text:#6E7F33;
  --mask-stroke:#C9CCC2;
  --bar-track:#F1F3EC;
  --bar-fill:#C4C9BA;
  --fig-glow:#D3D6CD;     /* block highlight in the method animations */
  --radius:14px;
  --wrap:1080px;
  --wide:1120px;
  color-scheme:light;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:64px}
body{margin:0;background:var(--bg);color:var(--ink);font:17.5px/1.6 Calibri,Carlito,"Segoe UI",system-ui,-apple-system,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased}
img,video{display:block;max-width:100%}
a{color:var(--accent-dark)}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 16px}
.wide{max-width:var(--wide);margin:0 auto;padding:0 16px}
.narrow{max-width:800px;margin:0 auto;padding:0 16px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

/* ---------- top nav ---------- */
.topnav{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.9);backdrop-filter:saturate(1.4) blur(10px);-webkit-backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
.topnav .wide{display:flex;align-items:center;gap:20px;height:52px}
.brand{font-weight:700;font-style:italic;font-size:20px;color:var(--accent);text-decoration:none;letter-spacing:-.01em}
.topnav nav{display:flex;gap:2px;margin-left:auto;overflow-x:auto;scrollbar-width:none}
.topnav nav::-webkit-scrollbar{display:none}
.topnav nav a{color:var(--muted);text-decoration:none;font-size:15px;font-weight:500;padding:6px 10px;border-radius:8px;white-space:nowrap}
.topnav nav a:hover{background:var(--accent-bg);color:var(--accent-dark)}
.theme-toggle{flex:none;appearance:none;width:36px;height:36px;border-radius:999px;border:1px solid var(--line);background:var(--card);color:var(--ink);display:grid;place-items:center;cursor:pointer;transition:border-color .15s,background .15s}
.theme-toggle:hover{border-color:var(--accent)}
.theme-toggle svg{width:18px;height:18px}
.theme-toggle .i-sun{display:none}
[data-theme="dark"] .theme-toggle .i-sun{display:block}
[data-theme="dark"] .theme-toggle .i-moon{display:none}

/* ---------- hero ---------- */
.hero{text-align:center;padding:52px 0 8px}
.wordmark{font-size:clamp(52px,9vw,92px);font-weight:700;font-style:italic;letter-spacing:-.03em;line-height:1;margin:0}
.wordmark span{color:var(--accent)}
.subtitle{font-size:clamp(20px,3vw,30px);font-weight:700;letter-spacing:-.01em;line-height:1.3;margin:14px auto 0;max-width:860px}
.authors{margin:22px auto 0;font-size:18px;line-height:1.7;max-width:880px}
.author{white-space:nowrap}
.authors a{color:var(--ink);text-decoration:none;border-bottom:1px solid transparent;transition:color .15s,border-color .15s}
.authors a:hover{color:var(--accent-dark);border-bottom-color:currentColor}
.authors sup{font-size:.62em;margin-left:1px;color:var(--muted)}
.affil{display:flex;justify-content:center;gap:22px;font-size:16px;color:var(--muted);margin-top:6px}
.affil sup{font-size:.7em;margin-right:2px}
.affil-note{font-size:13.5px;color:var(--muted);margin-top:2px}
.todo{background:#FFF6D6;outline:1px dashed #E2C266;border-radius:4px;padding:0 4px}
.buttons{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:24px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 18px;border-radius:999px;background:var(--ink);color:var(--on-ink);text-decoration:none;font-weight:700;font-size:15px;transition:transform .15s,background .15s}
.btn:hover{transform:translateY(-1px);background:#333a28}
.btn svg{width:18px;height:18px}
.btn.soon{background:#EEF0E8;color:#8a9080;cursor:default}
.btn.soon:hover{transform:none}
.btn small{font-weight:500;font-size:12px;opacity:.85}

/* ---------- sections ---------- */
section{padding:64px 0}
section.band{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.eyebrow{font-size:12.5px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);margin:0 0 6px}
h2{font-size:clamp(26px,3.4vw,34px);letter-spacing:-.02em;line-height:1.2;margin:0 0 10px}
h3.sub{font-size:22px;letter-spacing:-.01em;margin:44px 0 6px}
.lead{font-size:18.5px;color:var(--muted);margin:0 0 26px}
.center{text-align:center}
.center .lead{margin-left:auto;margin-right:auto}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px}
figcaption{font-size:15.5px;color:var(--muted);margin-top:12px;line-height:1.55}
figcaption b{color:var(--ink)}
.note{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:var(--muted);background:var(--accent-bg);border-radius:10px;padding:10px 14px;margin-top:16px}
.note svg{flex:none;width:18px;height:18px;margin-top:2px;color:var(--accent-dark)}

/* ---------- placeholders & auto-upgrading media slots ---------- */
.placeholder{position:relative;border:2px dashed #C9D3A8;border-radius:12px;background:repeating-linear-gradient(135deg,#F7F9F0 0 14px,#F1F5E4 14px 28px);display:flex;align-items:center;justify-content:center;text-align:center;color:var(--muted);overflow:hidden}
.ph-inner{padding:14px}
.ph-icon{width:52px;height:52px;margin:0 auto 10px;border-radius:50%;background:var(--card);display:grid;place-items:center;box-shadow:0 2px 10px rgba(0,0,0,.06)}
.ph-icon svg{width:24px;height:24px;color:var(--accent)}
.ph-title{font-weight:700;color:var(--ink);font-size:16px}
.ph-sub{font-size:12.5px;margin-top:4px}
.ph-sub code{background:var(--card);border:1px solid var(--line);border-radius:6px;padding:1px 6px;font-size:11.5px}
.ph-tag{position:absolute;top:10px;left:10px;font-size:10.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;background:var(--card);border:1px solid #E2C266;color:#9A7A12;border-radius:999px;padding:2px 9px}
.placeholder.compact .ph-inner{padding:8px}
.placeholder.compact .ph-icon{width:34px;height:34px;margin:6px auto 6px}
.placeholder.compact .ph-icon svg{width:15px;height:15px}
.placeholder.compact .ph-sub{margin:0}
.placeholder.compact .ph-sub code{font-size:10.5px;word-break:break-all}
.placeholder.compact .ph-tag{font-size:9.5px;top:7px;left:7px;padding:1px 7px}
.slot{position:relative}
.slot > video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;border-radius:inherit;background:#0d0f0a}
.slot.live > .placeholder{visibility:hidden}
.slot.live .ph-tag{display:none}
.ratio-16x9{aspect-ratio:16/9}
.ratio-4x3{aspect-ratio:4/3}
.ratio-2x1{aspect-ratio:2/1}

/* ---------- teaser (web-native figure) ---------- */
.overview-video{max-width:940px;margin:28px auto 0}
.teaser-video{display:block;width:100%;aspect-ratio:16/9;border-radius:14px;background:#0d0f0a;box-shadow:0 1px 2px rgba(0,0,0,.06),0 10px 30px rgba(20,30,0,.10)}
.intro{padding-bottom:60px}
#overview{border-top:1px solid var(--line)}
.tfig{display:grid;grid-template-columns:660fr 695fr 645fr;align-items:start;max-width:980px;margin:0 auto}
.tpanel{position:relative;min-width:0}
.tpanel > svg{display:block;width:100%;height:auto;overflow:hidden}
.tpanel .ov{position:absolute;overflow:hidden;pointer-events:none}
.tpanel .ov video{width:100%;height:100%;object-fit:cover;display:block}
.fig-svg{font-family:Calibri,Carlito,"Segoe UI",system-ui,-apple-system,Helvetica,Arial,sans-serif}
.fig-svg text{dominant-baseline:auto}
.t-title{font-weight:700;fill:#6E8B12}
.t-lbl{fill:#2a2d24}
.t-bold{font-weight:700;fill:#1a1a1a}
.t-ital{font-style:italic}
.t-serif{font-family:Georgia,"Times New Roman",serif}
.t-tok{fill:#fff;font-weight:700;font-style:italic;paint-order:stroke;stroke:rgba(0,0,0,.55);stroke-width:4px;stroke-linejoin:round}
.tracks path{fill:none;stroke:#F2C230;stroke-width:3;stroke-linejoin:round;stroke-linecap:round}
.tracks .mk{fill:#F2C230;stroke:#fff;stroke-width:1.8}
.tracks .mk-o{fill:#fff;stroke:#F2C230;stroke-width:1.8}
.teaser-cap{max-width:860px;margin:14px auto 0;text-align:center;font-size:15.5px;color:var(--muted)}
.tldr{max-width:940px;margin:28px auto 0;text-align:center;font-size:20.5px;line-height:1.55}
.tldr b{color:var(--accent-dark)}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:30px auto 0;max-width:940px}
.stat{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px 16px;text-align:center}
.stat .num{font-size:34px;font-weight:700;letter-spacing:-.02em;color:var(--accent-dark);line-height:1.1}
.stat .lbl{font-size:13.5px;color:var(--muted);margin-top:6px;line-height:1.4}
details.abstract{max-width:820px;margin:26px auto 0;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
details.abstract summary{cursor:pointer;list-style:none;padding:14px 18px;font-weight:700;display:flex;align-items:center;gap:10px}
details.abstract summary::-webkit-details-marker{display:none}
details.abstract summary::before{content:"";width:8px;height:8px;border-right:2px solid var(--accent-dark);border-bottom:2px solid var(--accent-dark);transform:rotate(-45deg);transition:transform .2s}
details.abstract[open] summary::before{transform:rotate(45deg)}
details.abstract p{margin:0;padding:0 18px 18px;text-align:justify;hyphens:auto;color:#2f3428}

/* ---------- shared animation primitives for figures ---------- */
.fx-float{animation:fxFloat 6s ease-in-out infinite;transform-box:fill-box;transform-origin:center}
@keyframes fxFloat{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}
.fx-breathe{animation:fxBreathe 3.2s ease-in-out infinite;transform-box:fill-box;transform-origin:center}
@keyframes fxBreathe{0%,100%{transform:scale(1)}50%{transform:scale(1.08)}}
.fx-pulse{animation:fxPulse 2.4s ease-in-out infinite;transform-box:fill-box;transform-origin:center}
@keyframes fxPulse{0%,100%{transform:scale(1);opacity:1}50%{transform:scale(1.1);opacity:.85}}
.fx-march{stroke-dasharray:10 8;animation:fxMarch 1s linear infinite}
@keyframes fxMarch{to{stroke-dashoffset:-18}}
.fx-march-slow{stroke-dasharray:8 10;animation:fxMarch 1.6s linear infinite}
.fx-kb{animation:fxKB 9s ease-in-out infinite alternate;transform-box:fill-box;transform-origin:center}
@keyframes fxKB{from{transform:scale(1)}to{transform:scale(1.14) translate(-2%,1%)}}
.fx-flicker{animation:fxFlicker 1.1s ease-in-out infinite;transform-box:fill-box;transform-origin:50% 100%}
@keyframes fxFlicker{0%,100%{transform:scale(1,1)}30%{transform:scale(.92,1.08)}60%{transform:scale(1.05,.95)}}
.fx-spin{animation:fxSpin 9s linear infinite;transform-box:fill-box;transform-origin:center}
@keyframes fxSpin{to{transform:rotate(360deg)}}
.fx-bob{animation:fxBob 1.6s ease-in-out infinite;transform-box:fill-box;transform-origin:center}
@keyframes fxBob{0%,100%{transform:translateY(-4px)}50%{transform:translateY(5px)}}
.fx-sheen{animation:fxSheen 3.6s ease-in-out infinite}
@keyframes fxSheen{0%{transform:translateX(-700px)}60%,100%{transform:translateX(700px)}}
.fx-orbit{animation:fxOrbit 4.2s ease-in-out infinite;transform-box:fill-box;transform-origin:center}
@keyframes fxOrbit{0%,100%{transform:translate(0,0)}25%{transform:translate(4px,-3px)}50%{transform:translate(0,-6px)}75%{transform:translate(-4px,-2px)}}
.fx-flowy{animation:fxFlowY 2.4s linear infinite}
@keyframes fxFlowY{from{transform:translateY(0)}to{transform:translateY(var(--d,120px))}}
.fx-flowx{animation:fxFlowX 3s linear infinite}
@keyframes fxFlowX{from{transform:translateX(0)}to{transform:translateX(var(--d,120px))}}
.fx-tok{animation:fxTok 2.4s ease-in-out infinite;transform-box:fill-box;transform-origin:center}
@keyframes fxTok{0%,60%,100%{transform:translateY(0)}20%{transform:translateY(-7px)}40%{transform:translateY(3px)}}

/* ---------- method figures ---------- */
.mfig{display:grid;grid-template-columns:1260fr 720fr;grid-template-areas:"a b" "ca cb";gap:0 18px;align-items:stretch}
.mfig .card{padding:14px;display:flex;align-items:center}
.mfig .card > *{width:100%}
.mfig-a{grid-area:a}.mfig-b{grid-area:b}.mcap-a{grid-area:ca}.mcap-b{grid-area:cb}
.scroll-fig{overflow-x:auto;-webkit-overflow-scrolling:touch}
.scroll-fig > svg{display:block;width:100%;height:auto}
.scroll-fig.fit > svg{max-width:var(--fit);margin:0 auto}
.mcap{font-size:15px;color:var(--muted);margin:10px 4px 0;line-height:1.5;min-height:0}
.mcap b{color:var(--ink)}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-bottom:22px}
.step{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px}
.step .n{width:30px;height:30px;border-radius:50%;background:var(--accent);color:#fff;font-weight:700;display:grid;place-items:center;font-size:15px;margin-bottom:8px}
.step h3{font-size:17px;margin:0 0 6px}
.step p{margin:0;font-size:15.5px;color:var(--muted);line-height:1.55}

/* SVG token styles shared by method diagrams */
.tk-t{fill:var(--tok-t)}
.tk-v{fill:var(--tok-v)}
.tk-vd{fill:#9DB25E}
.tk-q{fill:var(--tok-q)}
.tk-qp{fill:#F2E6C7;stroke:var(--tok-q);stroke-width:2.5}
.tk-a{fill:var(--tok-a)}
.tk-o{fill:var(--tok-o)}
.tk-nv{fill:#E5EAD4;stroke:var(--tok-v);stroke-width:2.5;stroke-dasharray:6 4}
.tk-na{fill:#E3E9F3;stroke:var(--tok-a);stroke-width:2.5;stroke-dasharray:6 4}
.tk-no{fill:#F4DAC8;stroke:var(--tok-o);stroke-width:2.5;stroke-dasharray:6 4}
.tk-nq{fill:#F7EBC9;stroke:var(--tok-q);stroke-width:2.5;stroke-dasharray:6 4}
.tk-c{fill:#F0D692}
.blk{fill:var(--fig-white)}
.blk-lbl{font-size:25px;fill:var(--fig-text);text-anchor:middle}
.lora{fill:var(--fig-lora)}
.lora-lbl{font-size:24px;fill:var(--fig-lora-text);text-anchor:middle}
.panel-bg{fill:var(--fig-panel)}
.cosmos{fill:var(--fig-cosmos);stroke:var(--tok-v);stroke-width:3}
.cosmos-in{fill:var(--fig-cosmos-in);opacity:.75}
.fig-lbl{font-size:25px;fill:var(--fig-text);text-anchor:middle}
.fig-cap{font-size:28px;fill:var(--fig-text);text-anchor:middle}
.arrow-gray{fill:none;stroke:#777;stroke-width:3}
.glow{fill:var(--fig-glow);opacity:0}

/* 8-second storyboard for the pretraining / transfer / policy diagrams */
.sb{animation-duration:8s;animation-iteration-count:infinite;animation-timing-function:ease-in-out}
.sb-glow{animation-name:sbGlow}
@keyframes sbGlow{0%,6%{opacity:0}10%{opacity:.85}22%,100%{opacity:0}}
.sb-in{animation-name:sbIn}
@keyframes sbIn{0%{opacity:.25}6%,92%{opacity:1}100%{opacity:.25}}
.sb-pop{animation-name:sbPop;transform-box:fill-box;transform-origin:center}
@keyframes sbPop{0%,4%{transform:scale(1)}8%{transform:scale(1.18)}14%,100%{transform:scale(1)}}
.sb-clean{animation-name:sbClean;opacity:0}
@keyframes sbClean{0%,50%{opacity:0}62%,90%{opacity:1}97%,100%{opacity:0}}
.sb-out{animation-name:sbOut;opacity:.2}
@keyframes sbOut{0%,64%{opacity:.2}72%,90%{opacity:1}97%,100%{opacity:.2}}
.sb-arrive{animation-name:sbArrive}
@keyframes sbArrive{0%,45%{opacity:.25}50%,92%{opacity:1}100%{opacity:.25}}
.sb-late{animation-name:sbLate;opacity:.2}
@keyframes sbLate{0%,26%{opacity:.2}32%,90%{opacity:1}97%,100%{opacity:.2}}

/* transfer diagram modes */
.mode-pills{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 12px}
.xfer .path-video,.xfer .path-action{transition:opacity .5s}
.xfer.mode-video .path-action{opacity:.22}
.xfer.mode-action .path-video{opacity:.22}

/* attention-mask widget */
.mask-cell{stroke:var(--mask-stroke);stroke-width:1.5;transition:fill .25s,opacity .25s}
.mask-cell.on-v{fill:#C6D499}
.mask-cell.on-q{fill:#EED185}
.mask-cell.on-a{fill:#B7CAEB}
.mask-cell.off{fill:var(--fig-white)}
.mask .dim{opacity:.3}
.mask-row-hit{fill:transparent;cursor:pointer}
.mask .row-active{stroke:var(--ink);stroke-width:3;fill:none;rx:6}

/* ---------- dataset overview ---------- */
.data-grid{display:grid;grid-template-columns:320px minmax(0,1fr);gap:24px;align-items:stretch}
.donut-card{contain:size;display:flex;flex-direction:column;min-height:0}
.donut-card .donut{flex:1 1 0;min-height:0;height:100%;max-width:100%}
.donut{display:block;width:100%;height:auto;max-width:280px;margin:0 auto}
.donut text{font-family:Calibri,Carlito,"Segoe UI",system-ui,-apple-system,Helvetica,Arial,sans-serif}
.donut .seg{fill:none;stroke-width:34;transition:stroke-width .2s;cursor:pointer}
.donut .seg:hover,.donut .seg.hl{stroke-width:42}
.legend{list-style:none;margin:14px 0 0;padding:0;font-size:14px}
.legend li{display:grid;grid-template-columns:14px 1fr auto;gap:10px;align-items:center;padding:6px 4px;border-bottom:1px solid var(--line);cursor:default}
.legend li:last-child{border-bottom:0}
.legend .sw{width:12px;height:12px;border-radius:3px}
.legend .hrs{font-variant-numeric:tabular-nums;color:var(--muted)}
.split{display:flex;height:10px;border-radius:5px;overflow:hidden;margin-top:14px}
.split-lbl{display:flex;justify-content:space-between;font-size:12.5px;color:var(--muted);margin-top:6px}
.ds-group{font-size:13px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin:0 0 10px}
.ds-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.ds{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:10px;transition:box-shadow .2s,transform .2s}
.ds:hover,.ds.hl{box-shadow:0 6px 22px rgba(60,80,10,.10);transform:translateY(-2px)}
.ds-media{position:relative;aspect-ratio:16/10;border-radius:10px;overflow:hidden;background:#0d0f0a}
.ds-media video{width:100%;height:100%;object-fit:cover;display:block}
.ds-task{position:absolute;left:0;right:0;bottom:0;padding:22px 10px 8px;font-size:13px;line-height:1.3;color:#fff;background:linear-gradient(to top,rgba(0,0,0,.72),rgba(0,0,0,0));pointer-events:none}
.ds-dots{position:absolute;top:8px;right:8px;display:flex;gap:5px}
.ds-dots button{appearance:none;width:8px;height:8px;padding:0;border-radius:50%;border:0;background:rgba(255,255,255,.5);cursor:pointer;box-shadow:0 0 0 1px rgba(0,0,0,.25)}
.ds-dots button.on{background:#fff}
.ds-meta{display:flex;align-items:center;flex-wrap:wrap;gap:4px 8px;padding:8px 2px 0}
.ds-name{font-weight:700}
.ds-hrs{margin-left:auto;font-size:14px;color:var(--muted);font-variant-numeric:tabular-nums}
.ds-desc{font-size:14px;color:var(--muted);padding:2px 2px 2px;line-height:1.35}

/* ---------- tabs / pills ---------- */
.pills{display:flex;flex-wrap:wrap;gap:6px;margin:0 0 16px}
.pill{appearance:none;border:1px solid var(--line);background:var(--card);color:var(--ink);font:inherit;font-size:13.5px;font-weight:700;line-height:1.3;padding:5px 12px;border-radius:999px;cursor:pointer;transition:all .15s}
.pill:hover{border-color:var(--accent);color:var(--accent-dark)}
.pill[aria-selected="true"]{background:var(--ink);border-color:var(--ink);color:var(--on-ink)}
.pill.sm{font-size:12.5px;padding:4px 10px}
.panel[hidden]{display:none}

/* ---------- chips ---------- */
.chip{display:inline-flex;align-items:center;gap:6px;padding:3px 10px;border-radius:999px;font-weight:700;font-size:13px;background:#F1F3EC;color:var(--ink);white-space:nowrap}
.chip::before{content:"";width:8px;height:8px;border-radius:50%;background:currentColor;opacity:.5}
.chip.h{background:#FCF1DC;color:#8A5E0B}
.chip.r{background:#E6EDFB;color:#2F4F96}
.chip.o{background:#EDE7F6;color:#5B3E8F}
.chip.g{background:#EAF2CF;color:#4C6309}

/* ---------- video tiles ---------- */
.tile{position:relative;border-radius:12px;overflow:hidden;background:#0d0f0a;box-shadow:0 1px 2px rgba(0,0,0,.06),0 8px 24px rgba(20,30,0,.08)}
.tile video{width:100%;height:auto;display:block}
.tile .tag{position:absolute;left:10px;top:10px;display:flex;gap:6px;align-items:center;flex-wrap:wrap;max-width:calc(100% - 20px)}
.tag .kind{font-size:10.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;padding:3px 8px;border-radius:6px;background:rgba(20,22,16,.78);color:#fff;backdrop-filter:blur(4px)}
.tag .kind.ours{background:var(--accent);color:#fff}
.tag .what{font-size:12px;font-weight:700;padding:3px 8px;border-radius:6px;background:rgba(255,255,255,.88);color:var(--ink)}
.tile.ours{outline:3px solid var(--accent);outline-offset:-3px}
.tile .tag.bottom{top:auto;bottom:10px}

/* source → target pair */
.xpair{display:grid;grid-template-columns:1fr 56px 1fr;align-items:center;gap:10px}
.flow{display:flex;flex-direction:column;align-items:center;gap:6px;color:var(--muted);font-size:11px;font-weight:700;text-align:center}
.flow .q{width:40px;height:40px;border-radius:10px;background:var(--accent-soft);display:grid;place-items:center;font:italic 800 19px Georgia,serif;color:#1B1F14}
.flow svg{width:44px;height:14px;overflow:visible}
.flow svg path{fill:none;stroke:var(--accent);stroke-width:3;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:6 6;animation:fxMarch .9s linear infinite}
.flow svg path.head{stroke-dasharray:none;animation:none}
.xgrid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.xgrid .xpair{grid-template-columns:1fr 36px 1fr;gap:8px}
.xgrid .tile video{aspect-ratio:640/440;object-fit:contain}
.xgrid > .xblock:last-child:nth-child(odd){grid-column:1 / -1;justify-self:center;width:calc(50% - 9px)}
.xgrid .flow .q{width:28px;height:28px;font-size:14px;border-radius:8px}
.xgrid .flow span{display:none}
.xgrid .flow svg{width:28px}
.xmeta{display:flex;align-items:center;gap:6px;flex-wrap:wrap;margin:0 0 10px;font-size:14px}
.xmeta .arrow{color:var(--muted);font-weight:700}
.xblock{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:14px}
/* several examples in one card: sources on top, transferred below, one column per example */
.xrows{display:grid;grid-template-columns:16px repeat(var(--n),minmax(0,1fr));grid-template-rows:repeat(5,auto);column-gap:14px;padding:16px}
.xcol{grid-row:1 / span 5;display:grid;grid-template-rows:subgrid;min-width:0}
.xc-head,.xc-foot{display:flex;justify-content:center;align-items:center;min-width:0}
.xc-head{padding-bottom:8px}
.xc-foot{padding-top:8px}
.xc-arrow{display:flex;justify-content:center;align-items:center;height:24px}
.xc-arrow svg{width:12px;height:16px;overflow:visible}
.xc-arrow path{fill:none;stroke:var(--accent);stroke-width:2.5;stroke-linecap:round;stroke-linejoin:round}
.xc-arrow path.shaft{stroke-dasharray:3 3;animation:fxMarch .9s linear infinite}
.xrows .tile video{aspect-ratio:640/440;object-fit:contain}
.xrow-lab{grid-column:1;writing-mode:vertical-rl;transform:rotate(180deg);justify-self:center;align-self:center;font-size:11px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);white-space:nowrap}
.xrow-lab.src{grid-row:2}
.xrow-lab.tgt{grid-row:4;color:var(--accent-dark)}

/* H2R comparison, two rows: [source → DreamX] / [AdaWorld, VideoWorld2, metrics].
   Column widths follow each video's pixel width so every row has one height. */
/* zero-shot H2R: source → DreamX + table on one row; baselines switch on into the row below.
   --hr-fixed is the non-video width of the top row, so baseline clips come out at the same height. */
.hr-grid{--hr-flow:56px;--hr-gap:12px;--hr-tbl:370px;--hr-fixed:calc(var(--hr-flow) + var(--hr-tbl) + 3 * var(--hr-gap));display:flex;flex-direction:column;gap:12px}
.hr-top{display:grid;grid-template-columns:minmax(0,854fr) var(--hr-flow) minmax(0,640fr) var(--hr-tbl);gap:var(--hr-gap);align-items:center}
.hr-bottom{display:flex;gap:var(--hr-gap);align-items:flex-start}
.hr-bottom[hidden]{display:none}
.hr-base{flex:none}
.hr-bottom{animation:hrIn .25s ease-out}
.hr-base[data-k="adaworld"]{width:calc((100% - var(--hr-fixed)) * 480 / 1494)}
.hr-base[data-k="videoworld2"]{width:calc((100% - var(--hr-fixed)) * 832 / 1494)}
@keyframes hrIn{from{opacity:0;transform:translateY(-4px)}}
.hr-metrics{padding:12px 14px}
.hr-metrics h4{margin:0 0 4px;font-size:15px}
.hr-metrics table{font-size:14px}
.hr-metrics th{padding:5px 4px}
.hr-metrics td{padding:7px 4px}
.hr-toggles{display:flex;align-items:center;flex-wrap:wrap;gap:8px}
.tgl{appearance:none;display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line);background:var(--card);color:var(--ink);font:inherit;font-size:13.5px;font-weight:700;line-height:1.3;padding:4px 12px 4px 6px;border-radius:999px;cursor:pointer;transition:border-color .15s,color .15s}
.tgl:hover{border-color:var(--accent);color:var(--accent-dark)}
.tgl .sw{position:relative;flex:none;width:28px;height:16px;border-radius:999px;background:#CDD3C2;transition:background .15s}
.tgl .sw::after{content:"";position:absolute;left:2px;top:2px;width:12px;height:12px;border-radius:50%;background:#fff;box-shadow:0 1px 2px rgba(0,0,0,.2);transition:transform .15s}
.tgl[aria-pressed="true"]{border-color:var(--accent)}
.tgl[aria-pressed="true"] .sw{background:var(--accent)}
.tgl[aria-pressed="true"] .sw::after{transform:translateX(12px)}
[data-theme="dark"] .tgl:not([aria-pressed="true"]) .sw{background:#3A4232}

/* action-transfer pair */
.apair{display:grid;grid-template-columns:1fr 64px 1fr;gap:12px;align-items:center;max-width:860px;margin:0 auto}
.apair .tile video{aspect-ratio:16/9;object-fit:cover}
.replay{appearance:none;border:1px solid var(--line);background:var(--card);border-radius:999px;font:inherit;font-size:13px;font-weight:700;padding:6px 12px;cursor:pointer;color:var(--ink)}
.replay:hover{border-color:var(--accent)}
.row-end{display:flex;justify-content:flex-end;margin:10px auto 0;max-width:860px}

/* ---------- attention maps (one clip at a time + progress gauge) ---------- */
.att-fig{margin:0;padding:14px}
.att-tile video{width:100%;height:auto}
.att-tile::after{content:"";position:absolute;top:0;bottom:0;left:50%;width:2px;margin-left:-1px;background:var(--card)}
.att-tile .tag.right{left:calc(50% + 10px)}
.att-gauge{height:6px;margin-top:10px;border-radius:3px;background:var(--bar-track);overflow:hidden}
.att-gauge span{display:block;height:100%;width:0;background:var(--accent);border-radius:3px}

/* ---------- numbers ---------- */
.charts{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.chart h3{font-size:16px;margin:0}
.chart .sub{font-size:13px;color:var(--muted);margin:2px 0 14px}
.bar{display:grid;grid-template-columns:118px 1fr 46px;align-items:center;gap:10px;font-size:14.5px;margin:7px 0}
.bar .name{color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.bar .track,.bar .fill{display:block}
.bar .track{height:14px;background:var(--bar-track);border-radius:7px;overflow:hidden}
.bar .fill{height:100%;background:var(--bar-fill);border-radius:7px;width:0;transition:width 1s cubic-bezier(.2,.7,.2,1)}
.bar .val{font-variant-numeric:tabular-nums;text-align:right;font-weight:700}
.bar.ours .name{color:var(--ink);font-weight:700}
.bar.ours .fill{background:var(--accent)}
.bar.ours .val{color:var(--accent-dark)}
.tbl-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:15px;font-variant-numeric:tabular-nums}
th,td{padding:8px;text-align:right;border-bottom:1px solid var(--line);white-space:nowrap}
th:first-child,td:first-child{text-align:left}
th{font-weight:700;color:var(--muted);font-size:12.5px}
tr.ours td{font-weight:700;color:var(--accent-dark);background:var(--accent-bg)}
tr.grp td{font-size:12px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);background:var(--card);text-align:left;padding-top:14px}
td.best{font-weight:700}
details.more{margin-top:16px}
details.more summary{cursor:pointer;font-weight:700;font-size:14.5px;color:var(--accent-dark);padding:6px 0}

/* ---------- bibtex ---------- */
.bib{position:relative;background:#14170F;color:#E8EDD8;border-radius:var(--radius);padding:20px 22px;font:13.5px/1.6 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;overflow-x:auto;white-space:pre-wrap;overflow-wrap:anywhere;margin:0}
.copy{position:absolute;top:12px;right:12px;appearance:none;border:1px solid #3a4130;background:#22261b;color:#E8EDD8;border-radius:8px;font:700 13px Calibri,Carlito,"Segoe UI",system-ui,-apple-system,Helvetica,Arial,sans-serif;padding:6px 10px;cursor:pointer}
.copy:hover{background:#2d3324}

footer{padding:36px 0 48px;text-align:center;color:var(--muted);font-size:13.5px;border-top:1px solid var(--line)}

/* ==========================================================================
   Night mode — toggled by the button in the top bar (data-theme="dark" on <html>)
   ========================================================================== */
[data-theme="dark"]{
  --accent:#A3C23A;
  --accent-dark:#B9D65A;
  --accent-bg:#1E2614;
  --ink:#E7ECDD;
  --muted:#A3AB96;
  --line:#2C3324;
  --surface:#161A13;
  --bg:#111410;
  --card:#1A1F16;
  --on-ink:#111410;
  --fig-white:#1B2017;
  --fig-panel:#20251B;
  --fig-text:#E3E8D8;
  --fig-cosmos:#20271A;
  --fig-cosmos-in:#3A4724;
  --fig-lora:#2C3720;
  --fig-lora-text:#C9DB8A;
  --mask-stroke:#3A4232;
  --bar-track:#232920;
  --bar-fill:#4A5240;
  --fig-glow:#4F564A;
  color-scheme:dark;
}
[data-theme="dark"] .topnav{background:rgba(17,20,16,.86)}
[data-theme="dark"] .todo{background:#3A3318;outline-color:#7A6420}
[data-theme="dark"] .btn:hover{background:#CFD6C0}
[data-theme="dark"] .btn.soon{background:#232920;color:#7E8672}
[data-theme="dark"] .placeholder{border-color:#3A4428;background:repeating-linear-gradient(135deg,#171C13 0 14px,#1B2116 14px 28px)}
[data-theme="dark"] .ph-tag{border-color:#7A6420;color:#D9B64A}
[data-theme="dark"] .chip{background:#232920}
[data-theme="dark"] .chip.h{background:#3A2E14;color:#F0C46A}
[data-theme="dark"] .chip.r{background:#1E2A44;color:#9DB8F0}
[data-theme="dark"] .chip.o{background:#2C2440;color:#C4A9F0}
[data-theme="dark"] .chip.g{background:#26301A;color:#B9D65A}
[data-theme="dark"] .bib{background:#0B0D09;border:1px solid var(--line)}
[data-theme="dark"] .tile{box-shadow:0 1px 2px rgba(0,0,0,.4),0 8px 24px rgba(0,0,0,.35)}
[data-theme="dark"] .ds:hover,[data-theme="dark"] .ds.hl{box-shadow:0 6px 22px rgba(0,0,0,.45)}

/* --- figures: text without an explicit colour follows the theme --- */
:where([data-theme="dark"]) :where(.fig-svg) text:where(:not([fill])){fill:var(--fig-text)}
[data-theme="dark"] .t-lbl{fill:var(--fig-text)}
[data-theme="dark"] .t-title{fill:#A9C84A}
[data-theme="dark"] .arrow-gray{stroke:#8F9784}
/* noisy / pale tokens */
[data-theme="dark"] .tk-qp{fill:#3A3320}
[data-theme="dark"] .tk-nv{fill:#2C3322}
[data-theme="dark"] .tk-na{fill:#232C3B}
[data-theme="dark"] .tk-no{fill:#3D2A1F}
[data-theme="dark"] .tk-nq{fill:#3A3320}
/* hard-coded fills inside the figures (presentation attributes) */
[data-theme="dark"] .fig-svg [fill="#fff"]{fill:var(--fig-white)}
[data-theme="dark"] .fig-svg g[fill="#fff"]{fill:var(--bg)}            /* inactive-frame dimming in the teaser strips */
[data-theme="dark"] .fig-svg .t-backdrop{fill:var(--bg)}
[data-theme="dark"] .fig-svg [fill="#E9EFD3"]{fill:#222919}          /* teaser outer cards */
[data-theme="dark"] .fig-svg [fill="#FAFBF5"]{fill:#151912}          /* teaser inner cards */
[data-theme="dark"] .fig-svg [fill="#E3EBC5"]{fill:#33401F}          /* big translucent arrows */
[data-theme="dark"] .fig-svg [fill="#F3E3B5"]{fill:#3D3219}          /* "same action" halo */
[data-theme="dark"] .fig-svg [fill="#EFEFEF"]{fill:#2A3022}          /* policy action chunk */
[data-theme="dark"] .fig-svg [fill="#ECEEE3"],
[data-theme="dark"] .fig-svg [fill="#E9EDDA"]{fill:#262D1E}          /* latent-action trays */
[data-theme="dark"] .fig-svg [fill="#F2EEDF"]{fill:#2E2C20}          /* μ / log σ² boxes */
[data-theme="dark"] .fig-svg [fill="#D3DEF0"]{fill:#23304A}          /* Action DiT */
[data-theme="dark"] .fig-svg [fill="#8a8a8a"]{fill:#9AA08E}
[data-theme="dark"] .fig-svg [stroke="#2a2d24"],
[data-theme="dark"] .fig-svg [stroke="#1B1F14"]{stroke:var(--ink)}
[data-theme="dark"] .fig-svg [stroke="#D3D6CC"]{stroke:var(--line)}
[data-theme="dark"] .fig-svg use.ink-icon,
[data-theme="dark"] .fig-svg use[href="#i-robot-o"]{color:var(--ink)}
[data-theme="dark"] #ah-dark path{fill:var(--ink)}
[data-theme="dark"] #ah-gray path{fill:#8F9784}
[data-theme="dark"] #g-fun-l stop{stop-color:#5C6E2A}
[data-theme="dark"] .fig-svg [fill="#6E8C0A"]{fill:#A9C84A}
[data-theme="dark"] .fig-svg [fill="#4A78C2"]{fill:#8FB0EE}
[data-theme="dark"] #g-band-y stop,[data-theme="dark"] #g-band-x stop{stop-color:#C6DD5B}
[data-theme="dark"] #g-band-y stop:nth-child(2),[data-theme="dark"] #g-band-x stop:nth-child(2){stop-opacity:.3}
[data-theme="dark"] .fig-svg image[href$="latent_mesh.png"]{opacity:.55}
[data-theme="dark"] .donut [fill="#1B1F14"]{fill:var(--ink)}
[data-theme="dark"] .donut [fill="#5E6553"]{fill:var(--muted)}

/* ---------- responsive ---------- */
@media (max-width:1000px){
  .stats{grid-template-columns:repeat(2,1fr)}
  .hr-grid{--hr-fixed:calc(var(--hr-flow) + 2 * var(--hr-gap))}
  .hr-top{grid-template-columns:minmax(0,854fr) var(--hr-flow) minmax(0,640fr)}
  .hr-metrics{grid-column:1 / -1}
  .data-grid{grid-template-columns:1fr}
  .donut-card{contain:none;display:grid;grid-template-columns:190px 1fr;gap:22px;align-items:center}
  .donut-card .donut{height:auto;flex:none}
  .donut-card .legend{margin:0}
}
@media (max-width:820px){
  .xgrid{grid-template-columns:1fr}
  .xgrid > .xblock:last-child:nth-child(odd){width:100%}
}
@media (max-width:720px){
  section{padding:48px 0}
  .hero{padding-top:36px}
  .authors{font-size:15.5px;line-height:1.65}
  .authors br{display:none}
  .affil{font-size:14.5px}
  .lead{font-size:16px;margin-bottom:18px}
  h3.sub{font-size:19px;margin-top:34px}
  figcaption{font-size:13.5px}
  .bib{font-size:12px;padding:16px}
  .att-fig{padding:10px}
  .att-gauge{margin-top:8px;height:5px}
  /* dataset cards: keep three per row, slim captions */
  .ds-cards{gap:8px}
  .ds{padding:6px;border-radius:10px}
  .ds-media{border-radius:7px}
  .ds-task{font-size:10.5px;padding:14px 6px 5px}
  .ds-dots{top:5px;right:5px;gap:4px}
  .ds-dots button{width:6px;height:6px}
  .ds-meta{padding:6px 2px 0;gap:0 4px}
  .ds-meta .chip{display:none}
  .ds-name{font-size:13px;line-height:1.25;width:100%}
  .ds-hrs{margin-left:0;font-size:11.5px}
  .ds-desc{display:none}
  /* video pairs stay side by side; the latent-action chip shrinks to an arrow */
  .xblock{padding:10px}
  .xmeta{font-size:12px;margin-bottom:8px}
  .xmeta .chip{font-size:11.5px;padding:2px 8px}
  .xpair,.xgrid .xpair,.apair{grid-template-columns:minmax(0,1fr) 22px minmax(0,1fr);gap:6px}
  .flow .q,.flow span{display:none}
  .flow svg,.xgrid .flow svg{width:20px;height:12px}
  .tile{border-radius:9px}
  .tile .tag{left:6px;top:6px;max-width:calc(100% - 12px)}
  .tile .tag.bottom{bottom:6px}
  .tag .kind{font-size:9px;padding:2px 6px;letter-spacing:.05em;white-space:nowrap}
  .row-end{margin-top:8px}
  /* zero-shot H2R on phones: source → DreamX, then the table, then any switched-on baselines */
  .hr-grid{--hr-flow:22px;--hr-gap:6px;gap:8px}
  .hr-metrics{padding:10px}
  .hr-metrics table{font-size:12.5px}
  .hr-metrics th{padding:5px 3px;font-size:11px}
  .hr-metrics td{padding:6px 3px}
  .hr-toggles{gap:6px}
  .tgl{font-size:12.5px;padding:3px 10px 3px 5px;gap:6px}
  .xrows{grid-template-columns:10px repeat(var(--n),minmax(0,1fr));column-gap:6px;padding:10px}
  .xrows .chip{white-space:normal;text-align:center;justify-content:center;font-size:10.5px;line-height:1.25;padding:2px 7px}
  .xrows .chip::before{display:none}
  .xc-head{padding-bottom:6px}.xc-foot{padding-top:6px}
  .xc-arrow{height:16px}.xc-arrow svg{width:10px;height:12px}
  .xrow-lab{font-size:8.5px;letter-spacing:.04em}
  /* method steps stay in one row */
  .steps{gap:8px}
  .step{padding:10px}
  .step .n{width:24px;height:24px;font-size:13px;margin-bottom:6px}
  .step h3{font-size:14px}
  .step p{font-size:12.5px;line-height:1.4}
  .mfig{grid-template-areas:"a b" "ca ca" "cb cb";gap:0 8px}
  .mfig .card{padding:6px;border-radius:10px}
  .mcap{min-height:0}
  .chart{padding:12px}
  .chart h3{font-size:14px}
  .chart .sub{font-size:11.5px;margin-bottom:8px}
  .charts{gap:10px}
  .bar{grid-template-columns:1fr auto;grid-template-areas:"name val" "track track";gap:2px 6px;font-size:12.5px;margin:6px 0}
  .bar .name{grid-area:name}.bar .val{grid-area:val}.bar .track{grid-area:track;height:8px}
  .tldr{font-size:17px}
}
@media (max-width:520px){
  .donut-card{grid-template-columns:120px 1fr;gap:12px}
  .legend{font-size:12.5px}
  .legend li{gap:6px;padding:4px 2px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001s!important;animation-iteration-count:1!important;transition:none!important}
}