:root{--bg:#fff;--fg:#1a1d21;--mut:#5a6270;--line:#d9dde3;--card:#f6f7f9;--acc:#0b5cad;--warn:#8a3b00;--warnbg:#fff1e4;--err:#a1111f;--errbg:#fdeaec}
@media (prefers-color-scheme:dark){:root{--bg:#14171b;--fg:#e8eaed;--mut:#a0a8b4;--line:#2d333b;--card:#1c2025;--acc:#6db3f5;--warn:#ffb77a;--warnbg:#33240f;--err:#ff8f9a;--errbg:#3a1519}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;display:flex;flex-direction:column;min-height:100vh;min-height:100dvh;background:var(--bg);color:var(--fg);font:16px/1.5 system-ui,-apple-system,"Segoe UI",sans-serif;overflow-x:hidden}
.wrap{max-width:52rem;margin:0 auto;padding:0 16px}
h1{font-size:1.5rem;margin:1rem 0 .25rem}
h2{font-size:1.15rem;margin:1.5rem 0 .5rem;border-bottom:1px solid var(--line);padding-bottom:.25rem}
.lede{color:var(--mut);margin:0 0 1rem}
a{color:var(--acc);overflow-wrap:anywhere}
label{display:block;margin:.5rem 0;font-size:.9rem;color:var(--mut)}
input,textarea{width:100%;font:inherit;color:var(--fg);background:var(--bg);border:1px solid var(--line);border-radius:6px;padding:.5rem}
button{font:inherit;color:var(--fg);background:var(--card);border:1px solid var(--line);border-radius:6px;padding:.4rem .9rem;cursor:pointer;min-height:40px}
button:disabled{opacity:.6;cursor:default}
details{border:1px solid var(--line);border-radius:6px;padding:.5rem .75rem;margin-bottom:1rem}
summary{cursor:pointer}
.row{display:flex;gap:.75rem;align-items:center;flex-wrap:wrap}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}

.item{border:1px solid var(--line);border-radius:8px;padding:.75rem;margin:.75rem 0;background:var(--card)}
.item h3{font-size:1.05rem;margin:.1rem 0}
.meta,.tags{font-size:.85rem;color:var(--mut)}
.badge{display:inline-block;font-size:.75rem;border:1px solid var(--warn);color:var(--warn);border-radius:99px;padding:0 .5rem;margin-left:.4rem}
.authors{display:flex;flex-wrap:wrap;gap:.25rem .9rem;margin:.4rem 0;font-size:.9rem}
.au{display:inline-flex;align-items:center;gap:.4rem}
.au img{width:32px;height:32px;border-radius:50%;object-fit:cover;background:var(--line)}
.tags span{display:inline-block;border:1px solid var(--line);border-radius:4px;padding:0 .35rem;margin:.1rem .2rem .1rem 0}
.abs{margin:.5rem 0}
.acts{display:flex;gap:.5rem;flex-wrap:wrap}
pre.doc,pre.cite{white-space:pre-wrap;overflow-wrap:anywhere;background:var(--bg);border:1px solid var(--line);border-radius:6px;padding:.6rem;font:.85rem/1.45 ui-monospace,Menlo,monospace;margin:.6rem 0 0;max-width:100%}

main{flex:1 0 auto;width:100%;position:relative;z-index:0;isolation:isolate;padding-bottom:1rem}
.card,.msg.assistant,.md,.srcs,.stage,.item{min-width:0;overflow-wrap:anywhere}
code,pre{overflow-wrap:anywhere}pre{max-width:100%;white-space:pre-wrap}
.turn{margin:1rem 0}
.msg.user{margin:1rem 0 0 auto;max-width:85%;width:fit-content;background:var(--acc);color:var(--bg);border-radius:16px 16px 4px 16px;padding:.5rem .8rem;overflow-wrap:anywhere;white-space:pre-wrap}
.res{margin-top:.5rem}
/* z-index scale: transcript 0 (isolated), composer 20 */
.composer{position:sticky;bottom:0;z-index:20;flex:none;background:var(--bg);border-top:1px solid var(--line);padding:.4rem 0 calc(.6rem + env(safe-area-inset-bottom))}
.chips{display:flex;flex-direction:column;gap:.5rem;margin:.6rem 0}
.welcome{margin:1.5rem 0}.welcome h2{border:0;margin:0 0 .3rem}
.stage{font-size:.85rem;color:var(--warn);margin:.4rem 0}
.stage .elapsed{font-variant-numeric:tabular-nums;white-space:nowrap;opacity:.75}
.more{margin-top:.8rem}.more summary{font-weight:600}
.card{border:1px solid var(--line);border-radius:12px;background:var(--card);padding:1.1rem 1.4rem 1.3rem}
.card.has-rate{position:relative;padding-bottom:3.1rem}
.rate{position:absolute;right:12px;bottom:10px;display:inline-flex;align-items:center;gap:2px;padding:2px;border:1px solid var(--line);border-radius:999px;background:var(--bg)}
.rate-btn{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;min-height:0;padding:0;border:0;border-radius:50%;background:transparent;color:var(--mut);transition:background-color .15s,color .15s}
.rate-btn:hover:not(:disabled){background:var(--card);color:var(--fg)}
.rate-btn:focus-visible{outline:2px solid var(--acc);outline-offset:1px}
.rate-btn:disabled{opacity:1;cursor:default}
.rate-btn:disabled[aria-pressed=false]{opacity:.45}
.rate-btn[aria-pressed=true]{color:var(--acc)}
.ico--up{--m:url(icons/thumb_up.svg);width:18px;height:18px}
.ico--down{--m:url(icons/thumb_down.svg);width:18px;height:18px}
.rate-btn[aria-pressed=true] .ico{background:var(--acc)}
.rate-thanks{font-size:.8rem;color:var(--mut);padding:0 8px 0 4px}
.rate-thanks:empty{display:none}
.rate.rated .rate-thanks{animation:ratePop .2s ease-out}
.rate-err{margin-top:.6rem;color:var(--err)}
@keyframes ratePop{from{opacity:0;transform:scale(.85)}to{opacity:1;transform:none}}
@media (pointer:coarse){.rate-btn{width:44px;height:44px}.card.has-rate{padding-bottom:4.2rem}}
.card h4{margin:1rem 0 .3rem;font-size:1rem}
.cite-kind h5{margin:.5rem 0 .2rem .6rem;font-size:.9rem;font-weight:600}.cite-kind h5+.fund-row{margin-left:.6rem}
.md{line-height:1.4}
.md p{margin:0 0 1em;line-height:1.4}.md>p:first-child{margin-top:0}.md>p:last-child{margin-bottom:0}
.md ul{margin:0 0 1em;padding-left:1.3rem}.md ul:last-child{margin-bottom:0}
.md li{line-height:1.4;margin:0 0 .45em}.md li:last-child{margin-bottom:0}
.md h4{margin:1.3em 0 .35em;line-height:1.3}.md>h4:first-child{margin-top:0}
.why,.blurb{margin:0;overflow-wrap:anywhere;line-height:1.4}
.why{font-size:14px;color:color-mix(in srgb,var(--mut) 55%,var(--fg));margin:.25em 0 0}
.blurb{font-size:13.5px;color:var(--mut);margin:.2em 0 0}
sup a{text-decoration:none;font-weight:600}
.srcs{padding-left:1.6rem;margin:.3rem 0}.srcs li{margin:.6rem 0;padding-left:.2rem}
.st{font-weight:600}
.srcs .au img{width:24px;height:24px}
.fine{margin-top:.8rem;font-size:.75rem}
[hidden]{display:none!important}
#connect{margin:.4rem 0}
.msg.assistant{margin:.5rem 0}

/* composer */
.box{position:relative;display:flex;align-items:flex-end;gap:.5rem;border:1px solid var(--line);border-radius:22px;padding:6px 6px 6px 14px;background:var(--bg);transition:border-color .2s,box-shadow .2s}
.box:focus-within{outline:2px solid transparent;border-color:var(--acc);box-shadow:0 0 0 3px rgba(11,92,173,.18);box-shadow:0 0 0 3px color-mix(in srgb,var(--acc) 22%,transparent)}
.ico{display:inline-block;flex:none;background:currentColor;-webkit-mask:var(--m) center/contain no-repeat;mask:var(--m) center/contain no-repeat}
.ico--spark{--m:url(icons/sparkle.svg);position:absolute;left:14px;top:15px;width:22px;height:22px;background:var(--acc);pointer-events:none;z-index:1}
.ico--send{--m:url(icons/send.svg);width:19px;height:19px}
.box textarea{flex:1;min-width:0;border:0;outline:0;resize:none;border-radius:0;background:transparent;padding:8px 0 8px 30px;line-height:24px;height:auto;min-height:40px;max-height:112px;overflow-y:auto;field-sizing:content}
.pill{--pill:#0b5cad;display:inline-flex;align-items:center;gap:.4rem;flex:none;min-height:40px;padding:0 16px 0 18px;border:0;border-radius:999px;background:var(--pill);color:#fff;font-weight:600;box-shadow:0 1px 2px rgba(0,0,0,.2);transition:transform .22s cubic-bezier(.34,1.56,.64,1),filter .2s,opacity .2s}
@media (prefers-color-scheme:dark){.pill{--pill:#2a73c5}}
.pill:hover:not(:disabled){transform:translateY(-1px);filter:brightness(1.08)}
.pill:active:not(:disabled){transform:translateY(1px) scale(.98);transition-duration:.08s}
.pill:focus-visible{outline:2px solid var(--acc);outline-offset:2px}
.pill:disabled{opacity:.55;filter:saturate(.5);cursor:progress}
.chip{text-align:left;border-radius:14px;min-height:0;padding:.5rem .8rem;color:var(--acc)}
.dot{display:block;flex:none;align-self:flex-end;width:8px;height:8px;border-radius:50%;background:var(--mut);margin:0 0 16px}
.dot.on{background:#1a9e4b}
/* motion: transform/opacity only */
html{scroll-padding-bottom:calc(var(--composer-h,7rem) + 12px)}
@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}
.msg{scroll-margin-bottom:calc(var(--composer-h,7rem) + 12px)}
@keyframes pop{from{opacity:0;transform:translateY(12px) scale(.96)}to{opacity:1;transform:none}}
@keyframes rise{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
@keyframes bounce{0%,80%,100%{transform:translateY(0);opacity:.45}40%{transform:translateY(-6px);opacity:1}}
@keyframes fadeUp{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}
@keyframes chipIn{from{opacity:0;transform:translateY(10px) scale(.92)}to{opacity:1;transform:none}}
@keyframes pulse{0%,100%{transform:scale(1);opacity:1}50%{transform:scale(1.22);opacity:.65}}
@keyframes breathe{0%,100%{opacity:1}50%{opacity:.35}}
.msg.user{transform-origin:100% 100%;animation:pop .36s cubic-bezier(.34,1.56,.64,1) backwards}
.msg.assistant{animation:rise .42s cubic-bezier(.34,1.56,.64,1) .12s backwards}
.dots{contain:layout paint;display:flex;gap:5px;height:22px;align-items:center;padding:2px 0;transition:opacity .2s,transform .2s,height .25s}
.dots i{width:7px;height:7px;border-radius:50%;background:var(--mut);animation:bounce 1.1s ease-in-out infinite}
.dots i:nth-child(2){animation-delay:.14s}.dots i:nth-child(3){animation-delay:.28s}
.msg.assistant[data-state=pending] .dots i{will-change:transform,opacity}
.msg.assistant:not([data-state=pending]) .dots i{animation:none}
.msg.assistant:not([data-state=pending]) .dots{opacity:0;transform:scale(.4);height:0;overflow:hidden}
.stage.swap{animation:fadeUp .24s ease-out}
.body{display:grid;grid-template-rows:0fr;opacity:0;transform:translateY(4px);transition:grid-template-rows .45s cubic-bezier(.22,1,.36,1),opacity .35s ease-out,transform .45s cubic-bezier(.22,1,.36,1)}
.body>.fold{min-height:0;overflow:hidden;contain:layout paint;margin-inline:-4px;padding-inline:4px}
.body.anim{will-change:opacity,transform}
.msg.assistant:not([data-state=pending]) .body{grid-template-rows:1fr;opacity:1;transform:none}
.srcs li,.item{animation:fadeUp .38s cubic-bezier(.34,1.56,.64,1) backwards;animation-delay:calc(.2s + var(--i,8)*40ms)}
.srcs li:nth-child(1),.item:nth-child(1){--i:0}.srcs li:nth-child(2),.item:nth-child(2){--i:1}.srcs li:nth-child(3),.item:nth-child(3){--i:2}.srcs li:nth-child(4),.item:nth-child(4){--i:3}.srcs li:nth-child(5),.item:nth-child(5){--i:4}.srcs li:nth-child(6),.item:nth-child(6){--i:5}.srcs li:nth-child(7),.item:nth-child(7){--i:6}.srcs li:nth-child(8),.item:nth-child(8){--i:7}
.chip{animation:chipIn .5s cubic-bezier(.34,1.56,.64,1) backwards;animation-delay:calc(var(--i,0)*70ms + .1s)}
.chip:nth-child(2){--i:1}.chip:nth-child(3){--i:2}.chip:nth-child(4){--i:3}.chip:nth-child(5){--i:4}
.chip{transition:transform .2s cubic-bezier(.34,1.56,.64,1)}.chip:hover{transform:translateY(-1px)}.chip:active{transform:scale(.98)}
.box.busy .ico--spark{will-change:transform,opacity;animation:pulse 1.4s ease-in-out infinite}
body.pending .dot{animation:breathe 2.4s ease-in-out infinite}
@media (prefers-reduced-motion:reduce){
html{scroll-behavior:auto}
*,*::before,*::after{animation:none!important;transition:none!important;transform:none!important;will-change:auto!important}
.dots i{opacity:.7}
.box.busy .ico--spark{opacity:.6}
}
@media (forced-colors:active){.ico{forced-color-adjust:none;background:CanvasText}.pill .ico{background:ButtonText}.rate-btn .ico{background:ButtonText}.rate-btn[aria-pressed=true] .ico{background:Highlight}.dot{forced-color-adjust:none;background:GrayText}.dot.on{background:Highlight}}
@media (max-width:380px){.wrap{padding:0 12px}.box{padding-left:12px;gap:.35rem}.ico--spark{left:12px}.pill{padding:0 12px 0 14px}}

.md img.av{width:32px;height:32px;border-radius:50%;object-fit:cover;vertical-align:middle;margin:0 .4em 0 0;background:var(--line,#e5e7eb)}
.md li img.av{margin:.1em .45em .1em 0}

.dot.off{background:#c0392b}
.box.off{opacity:.55;background:var(--line,#eef0f3);filter:grayscale(1)}
.box.off textarea{cursor:not-allowed}
.offline-note{margin:.4rem 0 0;font-size:13px;color:#8a2d22;text-align:center}
@media (prefers-color-scheme:dark){.offline-note{color:#f0a195}}
.newchat-row{margin:.3rem 0 0;text-align:center}.newchat{min-height:32px;padding:.2rem .8rem;font-size:.85rem;border-radius:14px;color:var(--acc)}.newchat[hidden]{display:none}
.preview-note{margin:.3rem 0;font-size:.85rem;color:var(--mut);text-align:center}
.pdf-pill{display:inline-block;margin-left:.35rem;padding:0 .5rem;border:1px solid var(--line);border-radius:999px;font-size:.75rem;line-height:1.4;color:var(--mut);text-decoration:none;background:transparent}
.pdf-pill:hover{color:var(--fg);border-color:var(--mut)}
.pdf-pill:focus-visible{outline:2px solid var(--acc);outline-offset:2px}
.chap-note{margin-left:.35rem;font-size:.75rem;color:var(--mut)}
.tl-cluster{border-top:1px solid var(--line);padding-top:.6rem;margin-top:.8rem}
.tl-cluster:first-of-type{border-top:0;margin-top:.2rem}
.tl-cluster h4{margin:.2rem 0 .2rem}
.tl-sentence{margin:.1rem 0 .3rem}
.tl-reps{margin:.4rem 0 0;padding-left:1.1rem}
.tl-reps li{margin:.25rem 0}
.tl-chip{display:inline-block;margin-left:.4rem;padding:0 .5rem;border:1px solid var(--line);border-radius:999px;font-size:.75rem;line-height:1.4;color:var(--mut)}
.tl-year{margin-left:.4rem;font-size:.8rem;color:var(--mut)}
.fund-row{display:flex;flex-wrap:wrap;align-items:center;gap:.3rem;margin:.2rem 0}.fund-lab{font-size:.75rem;color:var(--mut)}.fund-row .tl-chip{margin-left:0}
.fd-credit{color:var(--mut);font-style:italic}.fd-pubs,.fd-rank{padding-left:1.4rem}.fd-pubs li,.fd-rank li{margin:.5rem 0}
.pp-list,.ev-list{padding-left:1.4rem}.pp-list li,.ev-list li{margin:.6rem 0}
.pp-head{display:flex;align-items:center;gap:.6rem}
.pp-av{width:32px;height:32px;flex:none;border-radius:50%;object-fit:cover;background:var(--line)}
.pp-av--none{display:inline-flex;align-items:center;justify-content:center;font-size:.85rem;color:var(--mut)}
.pp-why{margin:.25rem 0 .15rem}
.ev-fmt{vertical-align:middle}
.soc-chip{display:inline-block;font-size:.75rem;border:1px solid var(--line);color:var(--mut);border-radius:99px;padding:0 .5rem;margin:0 .4rem 0 0;line-height:1.4;vertical-align:middle}h3 .soc-chip{margin:0 0 0 .4rem}
.prog-row{display:flex;flex-wrap:wrap;align-items:center;gap:.15rem .25rem;margin:.1rem 0 .2rem;font-size:.8rem;line-height:1.4;color:var(--mut);min-width:0;max-width:100%}
.prog-row .prog{color:var(--mut);font-weight:600;overflow-wrap:anywhere}
.prog-row a.prog{text-decoration:underline;text-underline-offset:2px}.prog-row a.prog:hover{color:var(--fg)}
.prog-row .sep{opacity:.6}
.tag-chip{display:inline-block;padding:0 .45rem;border:1px solid var(--line);border-radius:999px;font-size:.72rem;line-height:1.4;max-width:100%;overflow-wrap:anywhere}
.tag-more{font-size:.72rem}
.acts .more-like{white-space:normal;text-align:left}
.card.xp{margin-top:.9rem;animation:rise .42s cubic-bezier(.34,1.56,.64,1) backwards}
.xp-outline{margin:.2rem 0 .5rem;padding-left:1.2rem}.xp-outline li{margin:.1rem 0}
.xp-key{margin:.45rem 0}
.sim{font-size:.75rem;color:var(--mut)}