:root{
  --bg:#fbfaf7; --panel:#ffffff; --ink:#1c2128; --muted:#5d6672; --line:#e3e0d8;
  --accent:#0b5d57; --accent-ink:#ffffff; --accent-soft:#e3f1ef;
  --nl:#9a4a00; --nl-soft:#fdf0e1; --warn:#8a5a00; --warn-soft:#fff4d6;
  --code-bg:#f1efe9; --shadow:0 1px 2px rgba(20,20,20,.05),0 6px 18px rgba(20,20,20,.05);
  --radius:12px; --maxw:1120px;
  --font:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --serif:"Iowan Old Style","Palatino Linotype",Palatino,Georgia,"Times New Roman",serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}
@media (prefers-color-scheme:dark){
  :root{--bg:#14171a;--panel:#1b1f23;--ink:#e8e6e1;--muted:#a1a8b0;--line:#2b3238;--accent:#58c4b8;--accent-ink:#0d1a19;--accent-soft:#16312f;
  --nl:#f0a35a;--nl-soft:#33261a;--warn:#f0c46a;--warn-soft:#332a14;--code-bg:#242a30;--shadow:none}
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 var(--font);-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-underline-offset:2px}
a:hover{text-decoration-thickness:2px}
h1,h2,h3,h4{font-family:var(--serif);line-height:1.2;margin:0 0 .5em;font-weight:600;letter-spacing:-.01em}
h1{font-size:clamp(1.9rem,4vw,2.7rem)} h2{font-size:1.6rem;margin-top:2.2em} h3{font-size:1.2rem}
p{margin:0 0 .9em}
code,.mono{font-family:var(--mono);font-size:.9em}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px} .skip:focus{left:12px;top:12px;background:var(--panel);padding:8px 12px;z-index:100}

/* header */
.top{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 90%,transparent);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;gap:20px;height:60px}
.brand{font-family:var(--serif);font-weight:700;font-size:1.25rem;color:var(--ink);text-decoration:none;display:flex;align-items:center;gap:9px}
.brand .mark{min-width:28px;height:28px;padding:0 7px;border-radius:8px;background:var(--accent);color:var(--accent-ink);display:grid;place-items:center;font:700 .68rem var(--mono);white-space:nowrap}
.brand small{font:500 .7rem var(--font);color:var(--muted);border:1px solid var(--line);border-radius:99px;padding:1px 8px;margin-left:2px}
nav{display:flex;gap:2px;margin-left:auto;flex-wrap:wrap}
nav a{color:var(--ink);text-decoration:none;padding:7px 12px;border-radius:8px;font-size:.95rem}
nav a:hover{background:var(--code-bg)} nav a.on{background:var(--accent-soft);color:var(--accent);font-weight:600}
.pill{display:inline-flex;gap:6px;align-items:center;border:1px solid var(--line);background:var(--panel);border-radius:99px;padding:4px 12px;font-size:.85rem;color:var(--ink);text-decoration:none;white-space:nowrap}
.pill b{background:var(--accent);color:var(--accent-ink);border-radius:99px;min-width:20px;text-align:center;padding:0 6px;font-size:.78rem}
@media (max-width:760px){.top .wrap{height:auto;flex-wrap:wrap;padding-top:8px;padding-bottom:8px;gap:8px}nav{margin-left:0;width:100%;display:flex;flex-wrap:wrap;gap:2px}nav a{flex:0 0 auto;padding:6px 9px;font-size:.9rem}}

/* notice */
.notice{background:var(--warn-soft);color:var(--warn);border-bottom:1px solid color-mix(in srgb,var(--warn) 25%,transparent);font-size:.88rem}
.notice .wrap{padding-top:7px;padding-bottom:7px}
.notice a{color:inherit;font-weight:600}

/* hero */
.hero{padding:56px 20px 34px}
.hero .lead{font-size:1.2rem;color:var(--muted);max-width:44em}
.hero h1 em{font-style:normal;color:var(--accent)}
.search{display:flex;gap:8px;margin:26px 0 8px;max-width:640px}
.search input{flex:1;font:inherit;padding:13px 16px;border:1.5px solid var(--line);border-radius:12px;background:var(--panel);color:var(--ink)}
.search input:focus{outline:3px solid color-mix(in srgb,var(--accent) 35%,transparent);border-color:var(--accent)}
.btn{font:600 .92rem var(--font);display:inline-flex;align-items:center;gap:7px;padding:10px 16px;border-radius:10px;border:1.5px solid var(--accent);background:var(--accent);color:var(--accent-ink);cursor:pointer;text-decoration:none}
.btn:hover{filter:brightness(1.07)}
.btn.ghost{background:transparent;color:var(--accent)} .btn.small{padding:5px 11px;font-size:.82rem;border-radius:8px}
.btn[disabled]{opacity:.5;cursor:default}
.hint{font-size:.88rem;color:var(--muted)}
.hint a{color:var(--muted)}

/* three layers */
.layers{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:14px;margin:18px 0}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;box-shadow:var(--shadow)}
.card h3{margin-bottom:.35em;font-size:1.08rem}
.card .n{font:700 .75rem var(--mono);color:var(--accent);letter-spacing:.06em;text-transform:uppercase}
.example{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.example .row{display:grid;grid-template-columns:150px 1fr;gap:14px;padding:12px 18px;border-top:1px solid var(--line);align-items:baseline}
.example .row:first-child{border-top:0}
.example .k{font-size:.78rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}
@media (max-width:620px){.example .row{grid-template-columns:1fr;gap:2px}}

/* chips / identifiers */
code.id,.idchip{font-family:var(--mono);font-size:.86em;background:var(--nl-soft);color:var(--nl);border:1px solid color-mix(in srgb,var(--nl) 28%,transparent);padding:1px 6px;border-radius:6px;white-space:nowrap}
a code.id{cursor:pointer} a:hover code.id{border-color:var(--nl)}
.idchip{display:inline-flex;gap:6px;align-items:center;padding:3px 9px;font-size:.95rem}
.copy{all:unset;cursor:pointer;color:var(--nl);opacity:.7;font:600 .7rem var(--font);text-transform:uppercase;letter-spacing:.05em}
.copy:hover{opacity:1;text-decoration:underline}
.badge{display:inline-block;font:600 .74rem var(--font);padding:3px 9px;border-radius:99px;background:var(--code-bg);color:var(--muted);border:1px solid var(--line)}
.badge.ai{background:var(--warn-soft);color:var(--warn);border-color:color-mix(in srgb,var(--warn) 30%,transparent)}
.badge.ok{background:var(--accent-soft);color:var(--accent);border-color:color-mix(in srgb,var(--accent) 30%,transparent)}
.badges{display:flex;flex-wrap:wrap;gap:6px;margin:10px 0 0}
.reads{font-size:.85rem;color:var(--muted)} .reads span{color:var(--ink)}

/* dataset grid */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(310px,1fr));gap:14px}
.ds{display:flex;flex-direction:column;gap:8px;text-decoration:none;color:var(--ink);transition:transform .12s,border-color .12s}
.ds:hover{transform:translateY(-2px);border-color:var(--accent)}
.ds .theme{font:600 .75rem var(--font);color:var(--accent);text-transform:uppercase;letter-spacing:.06em}
.ds h3{font-size:1.05rem;margin:0}
.ds .meta{margin-top:auto;display:flex;gap:12px;color:var(--muted);font-size:.85rem;flex-wrap:wrap}

/* dataset page */
.page{display:grid;grid-template-columns:240px minmax(0,1fr);gap:40px;padding:34px 20px 80px;align-items:start}
.toc{position:sticky;top:84px;max-height:calc(100vh - 100px);overflow:auto;font-size:.88rem;padding-right:6px}
.toc h4{font:700 .72rem var(--font);text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:16px 0 6px}
.toc a{display:block;color:var(--muted);text-decoration:none;padding:3px 0 3px 10px;border-left:2px solid var(--line);line-height:1.35}
.toc a:hover,.toc a.on{color:var(--accent);border-left-color:var(--accent)}
.toc a.sub{padding-left:22px;font-size:.84rem}
@media (max-width:900px){.page{grid-template-columns:1fr}.toc{position:static;max-height:none;border-bottom:1px solid var(--line);padding-bottom:12px}}
.dhead{padding:34px 20px 0}
.crumbs{font-size:.88rem;color:var(--muted);margin-bottom:10px}.crumbs a{color:var(--muted)}
.title-nl{color:var(--muted);font-family:var(--serif);font-size:1.02rem;margin:-.2em 0 .8em}
.facts{display:flex;flex-wrap:wrap;gap:8px 24px;margin:14px 0;color:var(--muted);font-size:.92rem}
.facts b{color:var(--ink);font-weight:600}
.actions{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0}
.toolbar{display:flex;gap:14px;align-items:center;flex-wrap:wrap;margin:6px 0 18px;padding:9px 14px;background:var(--panel);border:1px solid var(--line);border-radius:10px;font-size:.9rem}
.switch{display:inline-flex;align-items:center;gap:8px;cursor:pointer;user-select:none}
.switch input{accent-color:var(--accent);width:16px;height:16px}

/* bilingual blocks */
.tx{position:relative;margin:0 0 .85em}
.tx .en{margin:0}
.tx .nl{display:none;margin:.3em 0 0;padding:6px 10px;background:var(--nl-soft);border-left:3px solid var(--nl);border-radius:0 8px 8px 0;font-size:.9rem;color:var(--ink)}
body.show-nl .tx .nl,.tx.open .nl{display:block}
.tx .tog{all:unset;cursor:pointer;font:700 .62rem var(--mono);color:var(--nl);background:var(--nl-soft);border:1px solid color-mix(in srgb,var(--nl) 30%,transparent);border-radius:4px;padding:0 4px;margin-left:6px;vertical-align:2px;opacity:.55}
.tx .tog:hover{opacity:1}
.tx li{margin:0}
ul.tl{margin:0 0 .85em;padding-left:1.3em} ul.tl li{margin:.15em 0}
ul.tl .tx{margin:0}

/* variable table + blocks */
table{border-collapse:collapse;width:100%;font-size:.93rem}
th,td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--line);vertical-align:top}
th{font:700 .74rem var(--font);text-transform:uppercase;letter-spacing:.06em;color:var(--muted);background:var(--code-bg)}
.tablewrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel)}
.tablewrap td.l{min-width:220px}
.var{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px 22px;margin:0 0 16px;box-shadow:var(--shadow)}
.var header{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:6px}
.var h3{margin:0;font-family:var(--mono);font-size:1.02rem;font-weight:700;word-break:break-all}
.var .lab{font-family:var(--serif);font-size:1.12rem;margin:2px 0 8px}
.var .sub{font:700 .72rem var(--font);text-transform:uppercase;letter-spacing:.07em;color:var(--muted);margin:14px 0 4px}
.var .tools{margin-left:auto;display:flex;gap:6px;align-items:center}
.codes{margin:6px 0 2px;font-size:.9rem}
.codes td:first-child{width:80px;font-family:var(--mono);color:var(--nl);font-weight:600}
.codes td.nlc{color:var(--muted)}
.var:target{outline:3px solid color-mix(in srgb,var(--accent) 45%,transparent)}
.fmt{font:.8rem var(--mono);color:var(--muted);border:1px solid var(--line);border-radius:6px;padding:0 6px}

/* explorer */
.explorer{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:28px;padding:30px 20px 80px;align-items:start}
@media (max-width:960px){.explorer{grid-template-columns:1fr}}
.filters{display:flex;gap:8px;flex-wrap:wrap;margin:10px 0 14px}
.filters select{font:inherit;padding:10px 12px;border:1.5px solid var(--line);border-radius:10px;background:var(--panel);color:var(--ink)}
.res{display:flex;gap:12px;padding:13px 4px;border-bottom:1px solid var(--line);align-items:flex-start}
.res .main{flex:1;min-width:0}
.res .l1{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.res .en{font-family:var(--serif);font-size:1.02rem;margin:3px 0 1px}
.res .sm{font-size:.86rem;color:var(--muted)}
.res .where{font-size:.8rem;color:var(--muted);margin-top:3px}
.basket{position:sticky;top:84px;padding:16px 18px}
.basket h3{margin-bottom:.4em}
.basket ul{list-style:none;margin:8px 0;padding:0;max-height:300px;overflow:auto}
.basket li{display:flex;justify-content:space-between;gap:8px;padding:5px 0;border-bottom:1px dashed var(--line);font-size:.86rem;align-items:center}
.basket li small{color:var(--muted);display:block;font-size:.74rem}
.x{all:unset;cursor:pointer;color:var(--muted);padding:0 5px}.x:hover{color:var(--ink)}
.empty{color:var(--muted);font-size:.9rem}
mark{background:color-mix(in srgb,var(--warn) 35%,transparent);color:inherit;border-radius:3px;padding:0 1px}

/* glossary */
.gloss td:first-child{width:36%;font-weight:600} .gloss td.en{width:30%}
.gloss .note{color:var(--muted);font-size:.9rem}
.gfilter{max-width:420px;margin:0 0 14px}
.gfilter input{width:100%;font:inherit;padding:11px 14px;border:1.5px solid var(--line);border-radius:10px;background:var(--panel);color:var(--ink)}

/* tutor */
.chat{background:var(--panel);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);overflow:hidden}
.chat .bar{display:flex;align-items:center;gap:10px;padding:12px 18px;border-bottom:1px solid var(--line);background:var(--code-bg)}
.chat .bar b{font-family:var(--serif);font-size:1.05rem}
.msgs{padding:18px;display:flex;flex-direction:column;gap:14px}
.msg{max-width:92%;padding:12px 16px;border-radius:14px}
.msg.u{align-self:flex-end;background:var(--accent);color:var(--accent-ink);border-bottom-right-radius:4px}
.msg.a{align-self:flex-start;background:var(--code-bg);border-bottom-left-radius:4px}
.msg.a p:last-child{margin-bottom:0}
.src{margin-top:8px;padding-top:8px;border-top:1px dashed var(--line);font-size:.84rem;color:var(--muted)}
.chips{display:flex;flex-wrap:wrap;gap:8px;padding:0 18px 16px}
.chips button{font:inherit;font-size:.88rem;padding:7px 12px;border-radius:99px;border:1.5px solid var(--line);background:var(--panel);color:var(--ink);cursor:pointer}
.chips button:hover{border-color:var(--accent);color:var(--accent)}
.askbox{display:flex;gap:8px;padding:14px 18px;border-top:1px solid var(--line)}
.askbox input{flex:1;font:inherit;padding:11px 14px;border:1.5px solid var(--line);border-radius:10px;background:var(--panel);color:var(--ink)}
.cols2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media (max-width:760px){.cols2{grid-template-columns:1fr}}
.steps{counter-reset:s;list-style:none;padding:0;margin:0}
.steps li{counter-increment:s;padding:10px 0 10px 44px;position:relative;border-bottom:1px solid var(--line)}
.steps li::before{content:counter(s);position:absolute;left:0;top:9px;width:30px;height:30px;border-radius:50%;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center;font:700 .85rem var(--mono)}

footer{border-top:1px solid var(--line);padding:30px 0 50px;color:var(--muted);font-size:.88rem}
footer .wrap{display:flex;flex-wrap:wrap;gap:20px;justify-content:space-between}
footer p{margin:0 0 .4em;max-width:48em}
.toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%) translateY(20px);background:var(--ink);color:var(--bg);padding:9px 16px;border-radius:10px;font-size:.9rem;opacity:0;pointer-events:none;transition:.2s;z-index:200}
.toast.on{opacity:1;transform:translateX(-50%) translateY(0)}
.section-lead{color:var(--muted);max-width:46em}
.kbd{font:600 .75rem var(--mono);border:1px solid var(--line);border-bottom-width:2px;border-radius:5px;padding:0 5px;background:var(--panel)}
@media print{.top,.notice,.toc,footer,.toolbar,.actions,.tools,.tog{display:none!important}.page{display:block}body{background:#fff;color:#000}}

code.id + .copy{margin-left:6px}

/* plan my project */
.plan-in textarea{width:100%;box-sizing:border-box;margin-top:8px;padding:12px;font:inherit;border:1px solid var(--line,#ccd);border-radius:10px;resize:vertical;background:var(--bg,#fff);color:inherit}
.plan-h{margin:26px 0 8px;font-size:1.05rem}
.plan-h .hint{font-weight:400;font-size:.85rem;margin-left:6px}
table.plan td{vertical-align:top}
table.plan td:nth-child(4){max-width:22em}
blockquote.card{margin:8px 0 6px;font-style:italic}
.plan-cta{margin:14px 0 6px;display:flex;gap:12px;align-items:center;flex-wrap:wrap}
/* affiliation: DIEP · UvA · RPA PSI */
.affil{display:flex;align-items:center;gap:16px;padding:14px 16px;border:1px solid var(--line);border-radius:14px;background:var(--card,rgba(255,255,255,.6));margin:0 0 22px}
.affil-txt{flex:1;min-width:0}
.affil .kicker{font:700 .72rem var(--font);text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin-bottom:2px}
.affil p{margin:0;font-size:.92rem;color:var(--ink);max-width:none}
.affil img,.affil .wordmark{flex:0 0 auto;border-radius:8px;background:#fff;padding:4px}
.affil .lg-diep{height:52px;width:auto;background:#0b0b0b}
.affil img.lg-uva{height:auto;width:220px;max-width:42vw;object-fit:contain;padding:8px 10px}
.affil .wordmark{display:grid;place-items:center;height:auto;min-height:40px;padding:6px 10px;font:700 .8rem var(--serif);color:#111;border:1px solid var(--line);text-align:center;line-height:1.15}
.affil .wordmark.lg-diep{color:#fff;letter-spacing:.12em}
.affil .wordmark.lg-uva{max-width:120px;font-size:.72rem}
footer .affil-wrap{display:block;margin-bottom:6px}
footer .affil{background:transparent;margin:0}
footer .affil p{font-size:.86rem;color:var(--muted)}
@media (max-width:620px){.affil{flex-wrap:wrap}.affil-txt{flex-basis:100%;order:3}}

/* review fixes: mobile overflow, focus, search hint */
.page>*,.explorer>*,.cols2>*{min-width:0}
.toc{max-width:100%}
@media (max-width:900px){.toc{overflow:auto;max-height:50vh}}
.tablewrap{max-width:100%;overflow-x:auto}
pre,code.id{overflow-wrap:anywhere}
.res .main{min-width:0}
input,select,textarea{max-width:100%}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:4px}
.qhint{margin:10px 0 0;padding:10px 14px;font-size:.92rem;border-left:3px solid var(--accent)}
.search input{min-width:0}
@media (max-width:620px){.search .btn{padding-left:12px;padding-right:12px}.page main table,.page table{display:block;max-width:100%;overflow-x:auto}}
.page article p,.page article li,.page article dd{overflow-wrap:anywhere}

.page article .tx,.page article .en,.page article .nl,.page article div{overflow-wrap:anywhere}
code.id{white-space:normal}
h1,h2,.dhead{overflow-wrap:anywhere}
.idchip{white-space:normal;overflow-wrap:anywhere;word-break:break-all;max-width:100%;flex-wrap:wrap}