:root{--ink:#1a1a1a;--muted:#5a5f66;--line:#e2e5ea;--accent:#0b5c8a;--bg:#fff;--tag:#eef2f6;--surface:#fff;--accent-soft:#dfe7ef;color-scheme:light dark}
@media(prefers-color-scheme:dark){:root{--ink:#e8eaed;--muted:#9aa2ab;--line:#2b3138;--accent:#6cb6e6;--bg:#14171a;--tag:#1e242b;--surface:#1b2027;--accent-soft:#233240}}
*{box-sizing:border-box}html{font-size:17px}
body{margin:0;font-family:-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6}
.skip{position:absolute;left:-999px}.skip:focus{left:8px;top:8px;background:#fff;padding:8px;z-index:10;border:2px solid var(--accent)}
header.site,footer.site{padding:1rem 1.25rem;border-bottom:1px solid var(--line)}
footer.site{border-top:1px solid var(--line);border-bottom:0;color:var(--muted);font-size:.9rem;margin-top:3rem}
.brand a{font-weight:700;color:var(--ink);text-decoration:none;font-size:1.15rem}
.brand span{display:block;color:var(--muted);font-size:.85rem}
header.site nav{margin-top:.6rem;display:flex;flex-wrap:wrap;gap:.15rem 1rem}
header.site nav a{color:var(--accent);text-decoration:none;font-size:.92rem}
header.site nav a[aria-current]{color:var(--ink);font-weight:600;text-decoration:underline}
main{max-width:52rem;margin:0 auto;padding:1.5rem 1.25rem}
h1{font-size:1.9rem;line-height:1.2;margin:.2rem 0 1rem}h2{font-size:1.3rem;margin:2rem 0 .6rem;border-bottom:1px solid var(--line);padding-bottom:.3rem}
h3{font-size:1.05rem;margin:1.4rem 0 .4rem;color:var(--muted)}
a{color:var(--accent)}.lede{font-size:1.12rem}.muted{color:var(--muted)}
.note{background:var(--tag);padding:.6rem .8rem;border-radius:6px;font-size:.9rem;color:var(--muted)}
ul.themes{columns:2;list-style:none;padding:0}ul.themes li{margin:.3rem 0}
ul.pubs,ul.news,ul.ids{list-style:none;padding:0}ul.pubs>li,ul.news>li{padding:.5rem 0;border-bottom:1px solid var(--line)}
.pub-t{font-weight:600}.pub-m{color:var(--muted);font-size:.93rem}
.tag{display:inline-block;background:var(--tag);color:var(--muted);font-size:.72rem;padding:.1rem .5rem;border-radius:10px;margin:.2rem .2rem 0 0}
.filters{display:flex;gap:1rem;flex-wrap:wrap;margin:1rem 0;padding:.6rem;background:var(--tag);border-radius:6px}
.filters select{font-size:.95rem;padding:.2rem}
table{width:100%;border-collapse:collapse;font-size:.92rem;margin:.5rem 0}
th,td{text-align:left;padding:.5rem .4rem;border-bottom:1px solid var(--line);vertical-align:top}
th{color:var(--muted);font-weight:600}
.placeholder-photo{width:140px;height:140px;border:2px dashed var(--line);border-radius:8px;display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:.8rem;text-align:center;float:right;margin:0 0 1rem 1rem}
@media(max-width:520px){ul.themes{columns:1}.placeholder-photo{float:none;margin:0 auto 1rem}}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
.grid-img{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem;margin:.5rem 0}
.grid-img figure{margin:0}.grid-img img{width:100%;height:auto;border-radius:8px;border:1px solid var(--line)}
.grid-img figcaption{font-size:.82rem;color:var(--muted);margin-top:.3rem}
.news img{max-width:100%;height:auto;border-radius:8px;margin:.5rem 0}
.roles-hero{color:var(--muted);font-size:.98rem}
section.feature{background:var(--tag);border-radius:10px;padding:.8rem 1rem;margin:1.2rem 0}
section.feature h2{border:0;margin:.2rem 0 .4rem}
ol.agenda{padding-left:1.2rem}ol.agenda li{margin:.4rem 0}
.hero{display:flex;gap:1.5rem;align-items:flex-start;flex-wrap:wrap;margin:.5rem 0 1rem}
.hero>div{flex:1;min-width:260px}
figure.portrait{margin:0;flex:0 0 200px}figure.portrait img{width:200px;height:auto;border-radius:12px;border:1px solid var(--line)}
figure.fig{margin:1rem 0}figure.fig img{width:100%;height:auto;border-radius:10px;border:1px solid var(--line)}
figure.fig figcaption,.grid-img figcaption{font-size:.85rem;color:var(--muted);margin-top:.35rem}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1rem;margin:.5rem 0}
.role-card{border:1px solid var(--line);border-radius:12px;padding:.8rem 1rem;background:var(--surface,#fff)}
.role-card h3{margin:.1rem 0 .3rem;color:var(--ink);font-size:1.02rem}
.role-titles{font-weight:600;margin:.2rem 0}.role-links{font-size:.85rem;margin:.4rem 0 0}
.grid-img figure{margin:0}
@media(max-width:520px){figure.portrait,figure.portrait img{flex-basis:auto;width:100%}}
.btn{display:inline-block;background:var(--accent);color:#fff;padding:.5rem .9rem;border-radius:8px;text-decoration:none;font-weight:600}
.btn:hover{filter:brightness(1.08)}
details.langsel{margin-top:.5rem;font-size:.9rem}details.langsel summary{cursor:pointer;color:var(--accent)}
details.langsel ul{list-style:none;display:flex;flex-wrap:wrap;gap:.2rem .9rem;padding:.4rem 0 0;margin:0}
nav.crumbs{font-size:.85rem;margin:0 0 .6rem}nav.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:.35rem;padding:0;margin:0}
nav.crumbs li:not(:last-child)::after{content:"›";margin-left:.35rem;color:var(--muted)}
nav.crumbs li[aria-current]{color:var(--muted)}
.chips{display:flex;flex-wrap:wrap;gap:.5rem;margin:.5rem 0}
.theme-chip{display:inline-block;background:var(--tag);color:var(--accent);padding:.35rem .75rem;border-radius:20px;text-decoration:none;font-size:.9rem}
.theme-chip:hover{background:#dfe7ef}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}
.asst{border:1px solid var(--line);border-radius:12px;padding:1rem;margin:1rem 0;background:var(--surface,#fff)}
.asst-intents{display:flex;flex-wrap:wrap;gap:.4rem;align-items:center;margin-bottom:.7rem}
.chip{background:var(--tag);color:var(--accent);border:1px solid var(--line);padding:.3rem .7rem;border-radius:20px;font-size:.88rem;cursor:pointer}
.chip:hover,.chip[aria-pressed="true"]{background:var(--accent);color:#fff}
.asst-controls{display:flex;flex-wrap:wrap;gap:1rem;align-items:center;margin:.4rem 0;font-size:.9rem}
.asst-controls select{padding:.2rem;font-size:.9rem}
.asst-form{display:flex;gap:.5rem;margin:.5rem 0}
.asst-form input[type=text]{flex:1;padding:.55rem .7rem;border:1px solid var(--line);border-radius:8px;font-size:1rem}
.asst-out{margin-top:.8rem}
.asst-answer{border-left:3px solid var(--accent);padding:.2rem 0 .2rem .8rem;margin:.6rem 0}
.asst-answer.none{border-left-color:var(--muted)}
.asst-conf{font-size:.8rem;color:var(--muted)}
.asst-why{font-size:.85rem;color:var(--muted);margin:.2rem 0}
.asst-why .mt{background:var(--tag);border-radius:4px;padding:0 .3rem;margin-right:.2rem}
.asst-score{font-variant-numeric:tabular-nums}
.asst-meta{font-size:.78rem;color:var(--muted);margin-top:.5rem}
details.asst-detail>summary{cursor:pointer;color:var(--accent);font-size:.85rem}
[dir=rtl] .asst-answer{border-left:0;border-right:3px solid var(--accent);padding:.2rem .8rem .2rem 0}
[dir=rtl] .asst-why .mt{margin-right:0;margin-left:.2rem}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}
a.tag{text-decoration:none}a.tag:hover{background:#dfe7ef}
.pub-abs{margin:.35rem 0}.pub-abs summary{cursor:pointer;color:var(--accent);font-size:.88rem}
.pub-abs p{font-size:.92rem;color:var(--ink);margin:.4rem 0}
pre.bibtex{background:var(--tag);padding:.6rem;border-radius:6px;overflow-x:auto;font-size:.8rem;white-space:pre-wrap}
.pub-rel{font-size:.82rem;margin-top:.25rem}
.theme-browse{font-size:.9rem;margin:.3rem 0 0}
.email{display:inline-flex;align-items:center;gap:.5rem;flex-wrap:wrap}
.email .email-addr{text-decoration:none;font-weight:600}
.email .email-copy{font-size:.8rem;padding:.15rem .55rem;border:1px solid var(--line);border-radius:6px;background:var(--tag);color:var(--accent);cursor:pointer}
.email .email-copy:hover{background:#dfe7ef}
.email .email-status{font-size:.8rem;color:var(--muted)}
footer.site .footer-links{display:flex;flex-wrap:wrap;gap:1.5rem;margin:0 0 .8rem}
footer.site .footer-links div{display:flex;flex-direction:column;gap:.15rem}
footer.site .footer-h{font-size:.75rem;text-transform:uppercase;letter-spacing:.04em;color:var(--muted)}
footer.site .footer-links a{font-size:.9rem}
footer.site .footer-meta{font-size:.85rem;margin:0}
.pub-summary{font-size:1rem;margin:.3rem 0 .8rem}
.filters label{display:inline-flex;flex-direction:column;font-size:.8rem;color:var(--muted);gap:.15rem}
.filters input[type=search]{font-size:.95rem;padding:.3rem .5rem;border:1px solid var(--line);border-radius:6px;min-width:14rem}
.result-count{align-self:flex-end;font-size:.9rem;color:var(--muted);font-weight:600}
.pubcat{margin:1.5rem 0}
.ptype{display:inline-block;font-size:.68rem;text-transform:uppercase;letter-spacing:.03em;color:var(--muted);border:1px solid var(--line);border-radius:4px;padding:0 .35rem;vertical-align:middle;margin-left:.3rem}
.show-more{margin:.6rem 0 0;background:var(--tag);color:var(--accent);border:1px solid var(--line);border-radius:8px;padding:.4rem .9rem;font-weight:600;cursor:pointer}
.show-more:hover{background:#dfe7ef}
.media-card{border:1px solid var(--line);border-radius:12px;padding:.9rem 1rem;background:var(--surface,#fff)}
.media-card h3{margin:.1rem 0 .5rem;color:var(--ink);font-size:1.02rem}
.media-card video,.media-card audio{width:100%;border-radius:8px}
.media-card figure{margin:0 0 .5rem}
.pub-ga{margin:.4rem 0}.pub-ga img{max-width:220px;height:auto;border:1px solid var(--line);border-radius:8px}
/* Release 2.0 design-system polish (dark-mode aware; reduced-motion respected) */
.skip:focus{background:var(--surface)}
section.feature{background:var(--tag)}
.role-card,.media-card{transition:box-shadow .18s ease,transform .18s ease,border-color .18s ease}
@media(prefers-reduced-motion:no-preference){.role-card:hover,.media-card:hover{box-shadow:0 6px 20px rgba(0,0,0,.08);transform:translateY(-2px);border-color:var(--accent-soft)}}
.theme-chip:hover,a.tag:hover,.chip:hover{background:var(--accent-soft)}
.hero{align-items:center}
main{max-width:54rem}
h2{letter-spacing:-.01em}
.lede{color:var(--ink)}
.cards{gap:1rem}
.audience-cta{display:flex;flex-wrap:wrap;gap:.6rem;margin:1rem 0}
.audience-cta a{display:inline-block;background:var(--tag);border:1px solid var(--line);border-radius:10px;padding:.55rem .9rem;text-decoration:none;color:var(--accent);font-weight:600}
.audience-cta a:hover{background:var(--accent-soft)}
.summary-card{border:1px solid var(--line);border-left:4px solid var(--accent);border-radius:10px;padding:.9rem 1.1rem;margin:1rem 0;background:var(--surface)}
.summary-card h3{margin:.1rem 0 .5rem}
.summary-grid{display:grid;grid-template-columns:120px 1fr;gap:.3rem .8rem;font-size:.94rem}
.summary-grid dt{font-weight:600;color:var(--muted)}
.summary-grid dd{margin:0}
.theme-hero{background:var(--tag);border-radius:12px;padding:1rem 1.2rem;margin:.4rem 0 1rem}
@media(max-width:640px){header.site nav{gap:.1rem .7rem;font-size:.9rem}main{padding:1.1rem 1rem}.summary-grid{grid-template-columns:1fr}}
.filter-chips{display:flex;flex-wrap:wrap;gap:.4rem;margin:.6rem 0}
.filter-chips button{background:var(--tag);border:1px solid var(--line);border-radius:16px;padding:.25rem .7rem;font-size:.85rem;color:var(--accent);cursor:pointer}
.filter-chips button[aria-pressed="true"]{background:var(--accent);color:#fff}
/* Release 2.1 grouped navigation */
header.site nav[aria-label="Primary"]{display:flex;flex-wrap:wrap;gap:.2rem 1.1rem;align-items:flex-start}
a.navtop{color:var(--accent);text-decoration:none;font-size:.94rem;padding:.1rem 0}
a.navtop[aria-current]{color:var(--ink);font-weight:600;text-decoration:underline}
.navgroup{position:relative}
.navgroup>summary{cursor:pointer;list-style:none;color:var(--accent);font-size:.94rem;padding:.1rem 0}
.navgroup>summary::-webkit-details-marker{display:none}
.navgroup>summary::after{content:"\25be";font-size:.7rem;margin-left:.2rem;color:var(--muted)}
.navgroup>summary.cur{color:var(--ink);font-weight:600}
.navmenu{position:absolute;z-index:30;top:1.7rem;left:0;background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:.4rem;margin:0;min-width:13rem;list-style:none;box-shadow:0 8px 24px rgba(0,0,0,.12)}
.navmenu li{margin:0;border:0;padding:0}
.navmenu a{display:block;padding:.4rem .55rem;border-radius:7px;text-decoration:none;color:var(--accent);font-size:.9rem}
.navmenu a:hover,.navmenu a[aria-current]{background:var(--tag);color:var(--ink)}
@media(max-width:640px){.navgroup{width:100%}.navmenu{position:static;box-shadow:none;border:0;padding:.1rem 0 .3rem .9rem;min-width:0}}
.theme-group{border:0;padding:0;margin:1.8rem 0 .4rem;font-size:1.05rem;text-transform:uppercase;letter-spacing:.05em;color:var(--muted)}
.asst-examples{display:flex;flex-wrap:wrap;gap:.4rem;align-items:center;margin:.5rem 0}
.tl-item .tag{margin-right:.15rem}.tl-item .tl-year{color:var(--muted);font-variant-numeric:tabular-nums;margin-right:.2rem}
li.tl-item{padding:.6rem 0}