:root{
 --bg:#F6F7F9; --card:#FFFFFF; --ink:#14171B; --soft:#565E68; --faint:#8D949C;
 --line:#E2E5E9; --line2:#EFF1F3;
 --panel:#F2F3F5; --on-ac:#FFFFFF;
 --ac:#4A3A82; --ac-t:#F0EEF7; --ac-l:#C4BADF;
 --A:#0B6B52; --A-t:#E6F2EE; --B:#1A5480; --B-t:#E6EFF6; --C:#69727C; --C-t:#EFF1F3;
 --m:'JetBrains Mono',ui-monospace,monospace; --s:'Newsreader',Georgia,serif; --b:'Inter',system-ui,sans-serif;
}
[data-theme="dark"]{
 --bg:#0F1216; --card:#171B21; --ink:#E7EAEE; --soft:#AEB5BE; --faint:#7E8791;
 --line:#272D36; --line2:#1E242C;
 --panel:#1B2027; --on-ac:#14171B;
 --ac:#A896EC; --ac-t:#241E38; --ac-l:#4A3A82;
 --A:#4FC298; --A-t:#12251E; --B:#5AA6E0; --B-t:#122334; --C:#8B939D; --C-t:#20262E;
}
/* Hand-drawn figures use a light-ink palette baked into the SVG — keep them on a light
   backing in dark mode so their strokes/labels stay legible. */
[data-theme="dark"] .fig-media{background:#F6F7F9;border-radius:10px;padding:8px}
[data-theme="dark"] .fig{background:var(--card)}
[data-theme="dark"] img{opacity:.94}
/* Dark-mode tints for the amber/red status badges (light pastels glare on a dark page) */
[data-theme="dark"] .t-badge.warn,[data-theme="dark"] .t-mini.warn,[data-theme="dark"] .st-badge.warn{background:#2c2611;color:#e6c168}
[data-theme="dark"] .t-badge.bad,[data-theme="dark"] .t-mini.bad,[data-theme="dark"] .st-badge.bad{background:#301a14;color:#eb917a}
[data-theme="dark"] .t-mini.warn{border-color:#5a4a1e}[data-theme="dark"] .t-mini.bad{border-color:#5c2f24}
[data-theme="dark"] .t-mini.ok{border-color:#1f4a3a}
.skip-link{position:fixed;top:-60px;left:8px;z-index:400;background:var(--ac);color:var(--on-ac);padding:10px 16px;border-radius:8px;font:600 13px var(--b);text-decoration:none;transition:top .15s}
.skip-link:focus{top:8px;outline:2px solid #fff;outline-offset:2px}
.cite-report{margin-left:10px;color:var(--ac);cursor:pointer}
.cite-report:hover{text-decoration:underline}
:focus-visible{outline:2px solid var(--ac);outline-offset:2px;border-radius:3px}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{background:var(--bg);color:var(--ink);font-family:var(--b);font-size:14px;line-height:1.55;-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:rgba(0,0,0,0)}
/* touch-action:manipulation disables the iOS double-tap-to-zoom gesture on controls,
   so rapidly tapping Next/Prev (or any button) navigates instead of zooming the page. */
a,button,select,summary,label,[onclick],[role=button],[role=link]{touch-action:manipulation}
a{color:var(--ac)}
/* --appmax scales the whole layout up on large monitors so the content is not a
   narrow ribbon in a sea of empty space, while keeping the reading measure bounded. */
:root{--appmax:1440px}
@media(min-width:1800px){:root{--appmax:1600px}}
@media(min-width:2400px){:root{--appmax:1760px}}
.app{max-width:var(--appmax);margin:0 auto;display:grid;grid-template-columns:312px 1fr;min-height:100vh}
@media(min-width:1800px){.app{grid-template-columns:340px 1fr}}
@media(max-width:1000px){.app{grid-template-columns:1fr}}
/* Mobile: collapse the chapter nav + mode buttons behind a Menu toggle so page
   content is visible immediately instead of ~2 screens below the navigation. */
.navtoggle{display:none}
@media(max-width:1000px){
 .navtoggle{display:block;width:100%;margin:10px 0 0;font-family:var(--b);font-size:13px;font-weight:700;color:var(--ac);background:var(--card);border:1px solid var(--line);border-radius:9px;padding:11px 12px;cursor:pointer;text-align:left}
 .navtoggle:hover{border-color:var(--ac)}
 .rail .modebar,.rail #nav{display:none}
 /* Open menu is a bounded, self-scrolling panel so it never turns the page into an
    endless list; picking an item closes it and returns to the top of the article. */
 .rail.navopen #nav{display:block;max-height:60vh;overflow-y:auto;-webkit-overflow-scrolling:touch;margin-top:8px;border-top:1px solid var(--line2)}
 .rail.navopen .modebar{display:grid}
}
html:not(.js) .rail #nav{max-height:none;overflow:visible}
.rail{background:var(--card);border-right:1px solid var(--line);padding:24px 18px 60px;position:sticky;top:0;height:100vh;overflow-y:auto}
@media(max-width:1000px){.rail{position:static;height:auto;border-right:0;border-bottom:1px solid var(--line);padding:14px 16px 12px}}
.brand{display:flex;align-items:center;gap:10px;padding-bottom:16px;border-bottom:1px solid var(--line);margin-bottom:12px;cursor:pointer;padding-left:6px}
.brand-mark{width:32px;height:32px;flex:none;border-radius:8px}
.brand-txt{min-width:0}
.brand .k{font-family:var(--m);font-size:9.5px;letter-spacing:.19em;text-transform:uppercase;color:var(--ac);font-weight:700}
.brand h1{font-family:var(--s);font-size:22px;font-weight:600;letter-spacing:-.01em;margin-top:4px;line-height:1.15}
.sb{position:relative;margin-bottom:8px;padding:0 6px}
.sb input{width:100%;padding:8px 11px 8px 30px;border:1px solid var(--line);border-radius:5px;font-family:var(--b);font-size:12.5px;background:var(--card);color:var(--ink)}
.sb input:focus{outline:2px solid var(--ac);outline-offset:-1px;background:var(--card)}
.sb .mag{position:absolute;left:16px;top:9px;color:var(--faint)}
.sr{position:absolute;top:36px;left:6px;right:6px;background:var(--card);border:1px solid var(--line);border-radius:6px;box-shadow:0 6px 22px rgba(20,23,27,.13);overflow:hidden;display:none;z-index:20;max-height:62vh;overflow-y:auto}
.sr.open{display:block}
.sri{padding:9px 11px;cursor:pointer;border-top:1px solid var(--line2)}
.sri:first-child{border-top:0}.sri:hover{background:var(--ac-t)}
.sri .g{font-family:var(--m);font-size:8px;letter-spacing:.09em;text-transform:uppercase;color:var(--ac);font-weight:700}
.sri .t{font-weight:600;font-size:12.5px;margin-top:1px}.sri .s{font-size:11px;color:var(--faint);line-height:1.4}
.nav-part{font-family:var(--m);font-size:9px;letter-spacing:.13em;text-transform:uppercase;color:var(--ac);font-weight:700;
 padding:16px 10px 4px;margin-top:6px;border-top:1px solid var(--line2)}
.nav-part:first-of-type{border-top:0;margin-top:8px}
.nav-home{display:flex;align-items:center;gap:7px;padding:8px 10px;border-radius:5px;cursor:pointer;font-size:13px;
 font-weight:600;color:var(--ac);background:var(--ac-t)}
.nav-home:hover{background:color-mix(in srgb,var(--ac) 16%,transparent)}
.nav-home.active{background:var(--ac);color:var(--on-ac)}
.nav-ch-h{display:flex;align-items:center;gap:7px;padding:7px 10px;border-radius:5px;cursor:pointer;user-select:none;
 font-family:var(--m);font-size:10px;letter-spacing:.08em;text-transform:uppercase;color:var(--soft);font-weight:700}
.nav-ch-h:hover{background:var(--panel);color:var(--ink)}
.nav-ch-h .chev{font-family:var(--b);font-weight:700;color:var(--faint);transition:transform .15s;display:inline-block}
.nav-ch.open .nav-ch-h .chev{transform:rotate(90deg)}
.nav-ch.open .nav-ch-h{color:var(--ink)}
.nav-ch-t{flex:1}
.nav-ch-n{font-family:var(--m);font-size:9px;font-weight:700;color:var(--faint);background:var(--line2);
 padding:1px 6px;border-radius:10px}
.nav-ch.hasactive .nav-ch-n{background:var(--ac-t);color:var(--ac)}
.nav-ch-items{display:none;padding:2px 0 6px 14px;margin-left:6px;border-left:1px solid var(--line2)}
.nav-ch.open .nav-ch-items{display:block}
.nav-item{padding:6px 10px;border-radius:4px;cursor:pointer;font-size:12.5px;color:var(--soft);line-height:1.3;transition:background .12s}
.nav-item:hover{background:var(--panel);color:var(--ink)}
.nav-item.active{background:var(--ac);color:var(--on-ac);font-weight:600}
/* home dashboard */
.hero{padding:12px 0 22px;border-bottom:1px solid var(--line);margin-bottom:24px}
.home-title{font-family:var(--s);font-size:40px;font-weight:600;letter-spacing:-.02em;line-height:1.08;margin:6px 0 0}
.home-sub{font-size:16px;color:var(--soft);max-width:60ch;margin:12px 0 18px;line-height:1.5}
.home-stats{display:flex;flex-wrap:wrap;gap:20px;font-size:13px;color:var(--faint)}
.home-stats b{color:var(--ink);font-family:var(--m);font-weight:700}
.home-browse{margin-top:20px}
.browse-lbl{font-family:var(--m);font-size:9.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--faint);font-weight:700}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px}
.chip{font-size:12.5px;padding:6px 13px;border-radius:20px;border:1px solid var(--line);background:var(--card);cursor:pointer;color:var(--soft);font-weight:500}
.chip:hover{border-color:var(--ac);color:var(--ac);background:var(--ac-t)}
.home-part{font-family:var(--m);font-size:9.5px;letter-spacing:.13em;text-transform:uppercase;color:var(--ac);font-weight:700;margin:26px 0 12px}
.home-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:12px}
.hcard{border:1px solid var(--line);border-radius:9px;padding:15px 16px;cursor:pointer;background:var(--card);transition:.15s}
.hcard:hover{border-color:var(--ac);box-shadow:0 4px 16px rgba(20,23,27,.07);transform:translateY(-1px)}
.hcard-t{font-family:var(--s);font-size:16px;font-weight:600;letter-spacing:-.01em}
.hcard-d{font-size:12.5px;color:var(--soft);margin-top:4px;line-height:1.4}
.hcard-n{font-family:var(--m);font-size:9.5px;letter-spacing:.05em;text-transform:uppercase;color:var(--faint);font-weight:700;margin-top:10px}
.home-foot{margin-top:30px;padding-top:16px;border-top:1px solid var(--line);font-size:11.5px;color:var(--faint);line-height:1.6;max-width:70ch}
.home-guide{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin:26px 0 4px;padding:20px 22px;background:var(--card);border:1px solid var(--line);border-radius:11px}
.hg-h{font-family:var(--m);font-size:9.5px;letter-spacing:.11em;text-transform:uppercase;color:var(--ac);font-weight:700;margin-bottom:11px}
.hg-item{font-size:12.5px;color:var(--soft);line-height:1.5;margin-bottom:8px}
.hg-item b{color:var(--ink);font-weight:600}
.lg-k{font-family:var(--m);font-size:8.5px;font-weight:700;letter-spacing:.06em;background:var(--ac);color:var(--on-ac);padding:2px 6px;border-radius:4px;vertical-align:middle}
.lg-d{font-size:11px;color:var(--faint)}
.home-disclaimer{margin-top:26px;padding:15px 18px;border:1px solid var(--ac-l);background:var(--ac-t);border-radius:10px;font-size:12px;color:var(--soft);line-height:1.6;max-width:none}
.home-disclaimer b{color:var(--ink);font-weight:600}
@media(max-width:720px){.home-guide{grid-template-columns:1fr}}
.t-row{display:flex;flex-wrap:wrap;gap:9px;margin-top:14px}
.t-mini{flex:1 1 120px;min-width:110px;background:var(--ac-t);border:1px solid var(--ac-l);border-radius:8px;padding:11px 12px;text-align:center}
.t-mini b{display:block;font-family:var(--m);font-size:18px;font-weight:700;color:var(--ink);line-height:1.1}
.t-mini span{display:block;font-size:10.5px;color:var(--soft);margin-top:3px;line-height:1.3}
.t-mini.ok{background:var(--A-t);border-color:#BFE0D4}.t-mini.ok b{color:var(--A)}
.t-mini.warn{background:#FAF2DE;border-color:#EAD9AE}.t-mini.warn b{color:#8A6009}
.t-mini.bad{background:#FAEBE5;border-color:#EEC9BB}.t-mini.bad b{color:#9E3417}
.seg-lab{font-family:var(--m);font-size:9.5px;letter-spacing:.09em;text-transform:uppercase;color:var(--soft);font-weight:700;margin:12px 0 6px}
.seg-grid{display:grid;grid-template-columns:repeat(9,1fr);gap:5px}
.seg{position:relative;border:1px solid var(--line);border-radius:6px;padding:6px 2px 4px;text-align:center;font-size:9px;color:var(--faint);cursor:pointer;background:var(--card);user-select:none;transition:.1s}
.seg b{display:block;font-family:var(--m);font-size:14px;font-weight:700;color:var(--ink)}
.seg:hover{border-color:var(--ac)}
.seg.s0{background:var(--card)}.seg.s1{background:#FBF3DD}.seg.s2{background:#F7E4C4}.seg.s3{background:#F2C9A6}.seg.s4{background:#E8A98A;border-color:#DA9270}
.seg.s1 b,.seg.s2 b,.seg.s3 b,.seg.s4 b{color:#7A3B12}
.t-addbtn{display:inline-block;font-size:12.5px;padding:6px 14px;border-radius:7px;border:1px solid var(--ac-l);background:var(--ac-t);color:var(--ac);cursor:pointer;font-weight:600}
.t-addbtn:hover{background:var(--ac);color:var(--on-ac)}
@media(max-width:560px){.seg-grid{grid-template-columns:repeat(6,1fr)}}
@media print{.tool script{display:none}}
@media print{.side,.topbar,.chips,.home-browse,.rel-chip,.related,details{display:none!important}.app{grid-template-columns:1fr}.page{page-break-after:always}.home-disclaimer{border:1px solid #999}}
.main{padding:30px 40px 80px;min-width:0}
@media(max-width:1000px){.main{padding:22px 18px 50px}}
.page{max-width:760px;display:none;animation:f .22s ease}
.page.active{display:block}
/* Progressive enhancement: if JS never runs (e.g. an iOS Quick Look / Files / Mail
   preview that doesn't execute scripts), the atlas is still navigable. Nav items and
   home cards are real <a href="#page-id"> anchors, so tapping them makes the target
   page appear via :target — no JavaScript required. JS adds .js to <html>, which
   disables all of these rules so the JS router takes over cleanly. */
html:not(.js) .page{display:none}
html:not(.js) #page-home{display:block}          /* default view */
html:not(.js) .page:target{display:block}        /* tapped page appears */
html:not(.js):has(.page:target) #page-home{display:none}  /* hide home once navigated (Safari 15.4+) */
/* Without JS the chapter nav can't be toggled open, so show it expanded and hide the
   JS-only Menu toggle / mode buttons. */
html:not(.js) .navtoggle{display:none}
html:not(.js) .rail #nav{display:block}
html:not(.js) .nav-ch-items{display:block}
html:not(.js) .rail .modebar{display:none}
/* Anchors reused as nav items / cards must not look or size like default links. */
a.nav-item{text-decoration:none;display:block}
a.hcard{text-decoration:none;color:inherit;display:block}
@keyframes f{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:none}}
.kick{font-family:var(--m);font-size:9.5px;letter-spacing:.15em;text-transform:uppercase;color:var(--ac);font-weight:700}
.ptitle{font-family:var(--s);font-size:34px;font-weight:600;letter-spacing:-.015em;line-height:1.12;margin:6px 0 0}
.ptitle .iso{display:block;font-family:var(--m);font-size:14px;font-weight:400;color:var(--faint);letter-spacing:0;margin-top:7px}
.psub{font-size:16.5px;color:var(--soft);margin:9px 0 15px;line-height:1.45}
.meta{display:flex;flex-wrap:wrap;align-items:center;gap:9px;margin-bottom:26px;padding-bottom:18px;border-bottom:1px solid var(--line)}
.evsum{font-family:var(--m);font-size:9.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--faint);font-weight:700;display:inline-flex;align-items:center;gap:4px}
.tag{font-family:var(--m);font-size:10px;color:var(--faint);letter-spacing:.02em}
.related{margin-top:34px;padding-top:20px;border-top:1px solid var(--line)}
.related-h{font-family:var(--m);font-size:10px;letter-spacing:.08em;text-transform:uppercase;color:var(--faint);font-weight:700;margin-bottom:12px}
.rel-chip{display:inline-block;font-size:12.5px;padding:5px 12px;margin:0 7px 7px 0;border-radius:16px;border:1px solid var(--line);background:var(--card);cursor:pointer;color:var(--soft);transition:all .12s}
.rel-chip:hover{border-color:var(--ac);color:var(--ac);background:var(--card)}
.gr{font-family:var(--m);font-size:8.5px;font-weight:700;padding:2px 5px;border-radius:3px;letter-spacing:.03em}
.gA{background:var(--A-t);color:var(--A)} .gB{background:var(--B-t);color:var(--B)}
.gC{background:var(--C-t);color:var(--C)} .gI{background:var(--ac-t);color:var(--ac)}
.body h2{font-family:var(--m);font-size:10px;letter-spacing:.15em;text-transform:uppercase;color:var(--faint);font-weight:700;margin:30px 0 11px}
/* Standardized educational-section identity: a consistent colour-coded icon
   marks each canonical teaching section (Quick Answer, Board Pearls, Pitfalls,
   Differential, Reporting, Self-Check, References) across every page. */
.body h2.sec{display:flex;align-items:center;gap:6px}
.body h2.sec .sec-ic{width:14px;height:14px;flex:0 0 auto;color:var(--sc,var(--faint))}
.body h2.sec-quick{--sc:var(--ac)}
.body h2.sec-why{--sc:#0E8C6A}
.body h2.sec-pearls{--sc:#C99700}
.body h2.sec-pitfall{--sc:#C0392B}
.body h2.sec-ddx{--sc:#7B4BC4}
.body h2.sec-report{--sc:#2563A6}
.body h2.sec-check{--sc:#2E8B57}
.body h2.sec-refs{--sc:var(--faint)}
.body h2.sec-related{--sc:var(--faint)}
[data-theme="dark"] .body h2.sec-why{--sc:#24A98A}
[data-theme="dark"] .body h2.sec-pearls{--sc:#E0B341}
[data-theme="dark"] .body h2.sec-pitfall{--sc:#E8776B}
[data-theme="dark"] .body h2.sec-ddx{--sc:#A896EC}
[data-theme="dark"] .body h2.sec-report{--sc:#6AA0E0}
[data-theme="dark"] .body h2.sec-check{--sc:#4FBE86}
.body h3{font-family:var(--s);font-size:18px;font-weight:600;margin:22px 0 7px;letter-spacing:-.01em}
.body p{margin:0 0 12px}
.body ul,.body ol{margin:8px 0 15px;padding-left:4px;list-style:none}
.body ol{counter-reset:li}
.body li{position:relative;padding:4px 0 4px 22px;line-height:1.55}
.body ul li::before{content:'';position:absolute;left:5px;top:12px;width:5px;height:5px;border-radius:50%;background:var(--ac)}
.body ol li{counter-increment:li}
.body ol li::before{content:counter(li);position:absolute;left:0;top:4px;font-family:var(--m);font-size:10px;font-weight:700;color:var(--ac)}
.body strong{font-weight:650}.body em{font-style:italic}
/* ---- yield-emphasis hierarchy ---- */
.body p.lead{font-size:16px;line-height:1.55;color:var(--ink)}
.body p.y1{font-size:15px;font-weight:600;color:var(--ink);background:var(--ac-t);border-left:3px solid var(--ac);
 padding:11px 15px;border-radius:0 7px 7px 0;margin:16px 0}
.body p.y1::before{content:"KEY POINT";display:block;font-family:var(--m);font-size:8.5px;font-weight:700;
 letter-spacing:.13em;color:var(--ac);margin-bottom:5px}
.body li.y1{list-style:none;font-weight:600;color:var(--ink)}
.body li.y1::before{background:var(--ac);width:7px;height:7px;top:11px}
.body p.y2,.body li.y2{font-weight:600;color:var(--ink)}
.body p.y4,.body li.y4{font-size:12.5px;color:var(--faint);line-height:1.5}
.body li.y4::before{background:var(--faint);width:4px;height:4px;top:13px}
.tbl-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;max-width:100%;margin:14px 0 18px}
.body table{width:100%;border-collapse:collapse;margin:0;font-size:13px}
/* Display equations ($$…$$ → MathML): centered, boxed graphic, theme-aware, mobile-scrollable */
.equation{margin:20px auto;text-align:center;overflow-x:auto;-webkit-overflow-scrolling:touch;
 padding:16px 18px;background:var(--panel);border:1px solid var(--line);border-radius:10px;max-width:100%}
.equation math{font-size:1.35em;color:var(--ink)}
.body th,.body td{text-align:left;padding:9px 12px;border-bottom:1px solid var(--line2);vertical-align:top}
.body thead th{font-family:var(--m);font-size:9px;letter-spacing:.06em;text-transform:uppercase;color:var(--faint);font-weight:700;border-bottom:1px solid var(--line)}
.body tbody tr:hover td{background:var(--panel)}
.body code{font-family:var(--m);font-size:12px;background:var(--panel);color:var(--ink);border:1px solid var(--line);padding:1px 5px;border-radius:3px}
.body pre{background:var(--card);border:1px solid var(--line);padding:13px 15px;border-radius:6px;overflow-x:auto;margin:12px 0}
.body pre code{background:none;padding:0}
.body blockquote{border-left:3px solid var(--ac-l);background:var(--ac-t);padding:11px 15px;border-radius:0 6px 6px 0;margin:14px 0;font-size:13px;color:var(--soft)}
.body blockquote p:last-child{margin-bottom:0}
.ev h2{font-family:var(--m);font-size:10px;letter-spacing:.15em;text-transform:uppercase;color:var(--faint);font-weight:700;margin:30px 0 12px;padding-top:20px;border-top:1px solid var(--line)}
.cites .ct{display:flex;gap:10px;align-items:flex-start;margin-bottom:9px;font-size:12px;line-height:1.5}
.cites .ct .gr{margin-top:1px;flex-shrink:0}
.cites .ct span:last-child{color:var(--soft)}.cites .ct b{color:var(--ink);font-weight:600}.cites .ct i{color:var(--soft)}
/* interactive tools */
.tool{border:1px solid var(--line);background:var(--card);border-radius:8px;padding:18px 20px;margin:16px 0}
.t-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media(max-width:560px){.t-grid{grid-template-columns:1fr}}
.t-f label{display:block;font-family:var(--m);font-size:9.5px;letter-spacing:.07em;text-transform:uppercase;color:var(--faint);font-weight:700;margin-bottom:5px}
.t-in{display:flex;border:1px solid var(--line);border-radius:6px;overflow:hidden;background:var(--card)}
.t-in input,.t-in select{flex:1;min-width:0;padding:8px 10px;border:0;background:transparent;color:var(--ink);font-family:var(--m);font-size:13px;outline:none}
.t-in input:focus{outline:2px solid var(--ac);outline-offset:-2px}
.t-in .u{padding:8px 10px;background:var(--panel);color:var(--faint);font-family:var(--m);font-size:11px;display:flex;align-items:center;border-left:1px solid var(--line)}
.t-out{margin-top:14px;padding:16px;border-radius:8px;background:var(--ac-t);border:1px solid var(--ac-l);text-align:center}
.t-out .n{font-family:var(--m);font-size:34px;font-weight:700;letter-spacing:-.02em;color:var(--ac);line-height:1}
.t-out .l{font-family:var(--m);font-size:9.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--soft);font-weight:700;margin-top:7px}
.t-out .x{font-size:12px;color:var(--faint);margin-top:9px;font-family:var(--m)}
.t-badge{margin-top:10px;padding:9px 13px;border-radius:6px;font-size:12.5px;font-weight:600;text-align:center}
.t-badge.ok{background:var(--A-t);color:var(--A)} .t-badge.warn{background:#FAF2DE;color:#8A6009} .t-badge.bad{background:#FAEBE5;color:#9E3417}
.t-note{margin-top:12px;font-size:11.5px;color:var(--faint);line-height:1.55}.t-note b{color:var(--soft)}
.rl-basis .ct{display:flex;gap:10px;align-items:flex-start;margin-bottom:9px;font-size:12px;line-height:1.5;color:var(--soft)}
.blk-note{border:1px solid var(--line);border-left:3px solid #215D91;background:var(--card);border-radius:6px;padding:13px 16px;margin-top:8px;font-size:13px;line-height:1.55}
.blk-note b{font-family:var(--s);font-size:14px;font-weight:600;display:block;margin-bottom:5px}
.blk-note p{margin:0}
.am-btn{background:var(--card);border:1px solid var(--line);border-radius:5px;padding:6px 13px;font-family:var(--m);font-size:10px;letter-spacing:.08em;text-transform:uppercase;cursor:pointer;color:var(--soft)}
.am-btn:hover{border-color:var(--ac);color:var(--ac)}
.legend{max-width:760px;margin:34px 40px 0;padding-top:16px;border-top:1px solid var(--line);font-size:11.5px;color:var(--faint);line-height:1.7}
.legend b{color:var(--soft)}
@media(max-width:1000px){.legend{margin:28px 18px 0}}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}
/* --- high-yield toggle --- */
.modebar{padding:2px 14px 10px}
.hybtn{width:100%;display:block;font:inherit;font-size:11.5px;font-weight:600;letter-spacing:.02em;color:var(--soft);background:transparent;border:1px solid var(--line);border-radius:7px;padding:7px 10px;cursor:pointer;transition:.15s}
.hybtn:hover{border-color:var(--ac);color:var(--ac)}
.hybtn.on{background:var(--ac);border-color:var(--ac);color:var(--on-ac)}
.hy-on .hy-x{display:none!important}
.hy-note{display:none}
.hy-on .hy-note{display:block;margin:0 0 14px;padding:7px 12px;font-size:11px;font-weight:600;color:var(--ac);background:color-mix(in srgb,var(--ac) 12%,transparent);border:1px solid color-mix(in srgb,var(--ac) 35%,transparent);border-radius:7px}
/* --- search snippet + highlight --- */
/* --- provenance & citation (authority layer) --- */
.prov{font-size:10.5px;color:var(--faint);display:inline-flex;gap:8px;align-items:center;margin-left:2px}
.rev{font-weight:600;padding:1px 7px;border-radius:20px;font-size:9.5px;letter-spacing:.03em;text-transform:uppercase}
.rev-ai{color:#c9a227;background:color-mix(in srgb,#c9a227 14%,transparent)}
.rev-phys{color:#3fae6f;background:color-mix(in srgb,#3fae6f 14%,transparent)}
.cite{margin:22px 0 4px;padding:11px 14px;border:1px dashed var(--line);border-radius:8px;font-size:11px;color:var(--faint);line-height:1.6}
.cite b{color:var(--soft)}
.cite code{font-size:10.5px;background:color-mix(in srgb,var(--ac) 12%,transparent);color:var(--ac);padding:1px 5px;border-radius:4px}
.hy-on .cite,.hy-on .prov{display:none}
.appfoot{margin:30px 40px 0;padding:14px 0 8px;border-top:1px solid var(--line);font-size:11px;color:var(--faint);display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}
@media(max-width:1000px){.appfoot{margin:24px 18px 0}}
.sri.sel{background:color-mix(in srgb,var(--ac) 16%,transparent)}
.sri .snip{font-size:10.5px;color:var(--faint);line-height:1.45;margin-top:3px}
.sri .snip b{color:var(--ac);font-weight:700}
mark.hl{background:var(--ac);color:var(--on-ac);border-radius:2px;padding:0 1px}
/* --- prev/next pager --- */
.pager{position:fixed;right:22px;bottom:18px;display:flex;gap:6px;z-index:40}
.pager button{font:inherit;font-size:11.5px;font-weight:600;color:var(--soft);background:var(--panel,#12171e);border:1px solid var(--line);border-radius:7px;padding:8px 12px;cursor:pointer;box-shadow:0 3px 12px rgba(0,0,0,.35);transition:.15s}
.pager button:hover:not(:disabled){border-color:var(--ac);color:var(--ac)}
.pager button:disabled{opacity:.35;cursor:default}
/* Mobile / iPhone optimizations ------------------------------------------------
   On a single-column phone layout a fixed corner pager floats over body text, so
   turn it into a full-width bottom bar (Prev left / Next right) with an opaque
   background and safe-area inset, and pad the content so nothing hides behind it.
   Inputs are forced to 16px so iOS Safari does not zoom the page on focus. */
@media(max-width:1000px){
 /* Inline (not fixed): a fixed bottom bar on iPhone sits behind Safari's own bottom
    toolbar, so Prev/Next were half-covered and "barely worked". As a normal in-flow bar
    at the end of the article they are always fully tappable. */
 .pager{position:static;left:auto;right:auto;bottom:auto;display:flex;justify-content:space-between;gap:12px;
  margin:8px 0 calc(20px + env(safe-area-inset-bottom));padding:0 2px;z-index:auto}
 .pager button{flex:1;font-size:15px;padding:13px 18px;min-height:48px;box-shadow:none;background:var(--card)}
 /* 16px inputs stop iOS zoom-on-focus */
 .sb input,.t-in input,.t-in select,.cmp-search,.pal-in,textarea,input[type=number],input[type=text]{font-size:16px}
 .sb .mag{top:12px}
 /* larger tap targets */
 .navtoggle{min-height:44px}
}

/* ===== modebar (two buttons) ===== */
.modebar{display:flex;flex-direction:column;gap:7px}
/* ===== copy-citation button ===== */
.cite-copy{font:inherit;font-size:10px;font-weight:600;color:var(--soft);background:transparent;border:1px solid var(--line);border-radius:5px;padding:2px 9px;cursor:pointer;transition:.15s;white-space:nowrap}
.cite-copy:hover{border-color:var(--ac);color:var(--ac)}
.hy-on .cite-copy{display:none}
/* ===== Study Mode ===== */
.study-ov{position:fixed;inset:0;z-index:120;background:rgba(6,9,13,.72);backdrop-filter:blur(3px);display:none;align-items:flex-start;justify-content:center;overflow-y:auto;padding:40px 16px}
.study-ov.on{display:flex}
.study-box{position:relative;width:100%;max-width:680px;background:var(--card,#12171e);border:1px solid var(--line);border-radius:14px;box-shadow:0 20px 60px rgba(0,0,0,.5);padding:30px 32px 34px;margin:auto 0}
.study-x{position:absolute;top:14px;right:16px;width:30px;height:30px;border-radius:8px;border:1px solid var(--line);background:transparent;color:var(--faint);font-size:19px;line-height:1;cursor:pointer;transition:.15s}
.study-x:hover{border-color:var(--ac);color:var(--ac)}
.study-box h2{font-size:19px;margin:0 0 6px;letter-spacing:-.01em}
.st-sub{font-size:12.5px;color:var(--faint);line-height:1.6;margin:0 0 20px;max-width:56ch}
.st-start label{display:block;font-size:10.5px;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--faint);margin:14px 0 6px}
.st-start select{width:100%;font:inherit;font-size:13px;color:var(--soft);background:var(--panel,#0e1319);border:1px solid var(--line);border-radius:8px;padding:9px 11px}
.st-go{margin-top:20px;width:100%;font:inherit;font-size:14px;font-weight:700;color:var(--on-ac);background:var(--ac);border:0;border-radius:9px;padding:12px;cursor:pointer;transition:.15s}
.st-go:hover{filter:brightness(1.08)}
.st-clear{margin-top:10px;width:100%;font:inherit;font-size:11px;font-weight:600;color:var(--faint);background:transparent;border:1px solid var(--line);border-radius:8px;padding:8px;cursor:pointer}
.st-clear:hover{color:var(--ac);border-color:var(--ac)}
.st-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}
.st-count{font-size:12px;font-weight:700;color:var(--ac);letter-spacing:.04em}
.st-score{font-size:12px;font-weight:600;color:var(--faint)}
.st-ch{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--faint);margin-bottom:4px}
.st-topic{font-size:12.5px;font-weight:700;color:var(--ac);margin-bottom:12px;padding-bottom:10px;border-bottom:1px solid var(--line)}
.st-q{font-size:16px;line-height:1.55;color:var(--ink);font-weight:500}
.st-a{margin-top:18px;padding:16px 18px;background:color-mix(in srgb,var(--ac) 8%,transparent);border:1px solid color-mix(in srgb,var(--ac) 26%,transparent);border-radius:10px;font-size:13.5px;line-height:1.62;color:var(--soft)}
.st-a p{margin:0 0 8px}.st-a p:last-child{margin-bottom:0}
.st-alab{font-size:9.5px;font-weight:700;text-transform:uppercase;letter-spacing:.07em;color:var(--ac);margin-bottom:7px}
.st-src{margin-top:12px;font-size:11px;color:var(--faint)}
.st-src a{color:var(--ac);cursor:pointer;text-decoration:none}.st-src a:hover{text-decoration:underline}
.st-act{margin-top:20px;display:flex;gap:10px}
.st-act button{flex:1;font:inherit;font-size:13.5px;font-weight:600;border-radius:9px;padding:12px;cursor:pointer;border:1px solid var(--line);background:transparent;color:var(--soft);transition:.15s;display:inline-flex;align-items:center;justify-content:center;gap:8px}
.st-reveal:hover{border-color:var(--ac);color:var(--ac)}
.st-miss{border-color:color-mix(in srgb,#e5484d 45%,var(--line))!important;color:#e5716f!important}
.st-miss:hover{background:color-mix(in srgb,#e5484d 12%,transparent)}
.st-got{border-color:color-mix(in srgb,#3fae6f 45%,var(--line))!important;color:#4cc487!important}
.st-got:hover{background:color-mix(in srgb,#3fae6f 12%,transparent)}
.st-kbd{font-size:9.5px;font-weight:700;color:var(--faint);border:1px solid var(--line);border-radius:4px;padding:1px 5px}
.st-big{font-size:44px;font-weight:800;letter-spacing:-.02em;margin:6px 0 18px;color:var(--soft)}
.st-big span{color:var(--faint);font-weight:600}
.st-big em{font-style:normal;font-size:18px;color:var(--ac);margin-left:12px;font-weight:700}
.st-exam{background:var(--card);color:var(--ac);border:1px solid var(--ac);margin-top:10px}
.st-exam:hover{background:var(--ac-t);filter:none}
.st-examnote{font-size:11px;color:var(--faint);line-height:1.5;margin:12px 0 0;max-width:56ch}
.st-timer{font-variant-numeric:tabular-nums;font-weight:700;color:var(--ac)}
.st-exlbl{font-size:9px;font-weight:800;letter-spacing:.08em;color:var(--ac);background:var(--ac-t);padding:1px 5px;border-radius:4px}
.st-badge{display:inline-block;font-size:12px;font-weight:700;padding:6px 12px;border-radius:8px}
.st-badge.ok{background:var(--A-t);color:var(--A)} .st-badge.warn{background:#FAF2DE;color:#8A6009} .st-badge.bad{background:#FAEBE5;color:#9E3417}
.ex-doms{margin:14px 0 6px;text-align:left}
.ex-domh{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--faint);margin-bottom:10px}
.ex-dom{display:flex;align-items:center;gap:10px;margin-bottom:7px;font-size:11.5px}
.ex-dn{flex:0 0 34%;color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ex-db{flex:1;height:8px;background:var(--line);border-radius:5px;overflow:hidden}
.ex-df{display:block;height:100%;border-radius:5px}
.ex-df.ok{background:#3fae6f}.ex-df.warn{background:#c99a2e}.ex-df.bad{background:#c8674a}
.ex-dp{flex:0 0 auto;color:var(--soft);font-variant-numeric:tabular-nums;white-space:nowrap}
.st-misslist{font-size:12px;line-height:1.6;color:var(--faint);max-height:38vh;overflow-y:auto;border-top:1px solid var(--line);padding-top:12px}
.st-misslist b{color:var(--soft);display:block;margin-bottom:8px}
.st-mi{margin-bottom:7px}
.st-mi a{color:var(--ac);cursor:pointer;text-decoration:none;font-weight:600}.st-mi a:hover{text-decoration:underline}
.st-perfect{font-size:13px;color:#4cc487;font-weight:600}
.st-sumbtn{display:flex;gap:10px;margin-top:22px}
.st-sumbtn button{flex:1;font:inherit;font-size:13px;font-weight:700;border-radius:9px;padding:11px;cursor:pointer;border:1px solid var(--line);background:transparent;color:var(--soft)}
.st-sumbtn button:hover{border-color:var(--ac);color:var(--ac)}
.st-drill{background:var(--ac)!important;color:var(--on-ac)!important;border-color:var(--ac)!important}
@media(max-width:560px){.study-box{padding:24px 20px 28px}}

/* ===== On this page (section navigator) ===== */
/* Anchor the TOC to the centered app's right edge (not the viewport), so on wide
   monitors it stays beside the reading column instead of drifting to the far edge. */
.toc{position:fixed;top:88px;right:max(22px, calc((100vw - var(--appmax))/2 + 22px));width:196px;max-height:72vh;overflow-y:auto;display:none;z-index:30}
.toc.on{display:block}
.hy-on .toc{display:none}
@media(max-width:1380px){.toc.on{display:none}}
.toc-h{font-size:9.5px;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--faint);margin:0 0 8px 12px}
.toc a{display:block;padding:4px 12px;font-size:11px;line-height:1.42;color:var(--faint);text-decoration:none;border-left:2px solid var(--line);cursor:pointer;transition:.12s}
.toc a:hover{color:var(--soft);border-left-color:var(--soft)}
.toc a.cur{color:var(--ac);border-left-color:var(--ac);font-weight:600}
/* ===== keyboard shortcuts help ===== */
.foot-link{color:var(--ac);cursor:pointer;text-decoration:none}
.foot-link:hover{text-decoration:underline}
.help-ov{position:fixed;inset:0;z-index:130;background:rgba(6,9,13,.72);backdrop-filter:blur(3px);display:none;align-items:center;justify-content:center;padding:24px}
.help-ov.on{display:flex}
.help-box{position:relative;width:100%;max-width:420px;background:var(--card,#12171e);border:1px solid var(--line);border-radius:14px;box-shadow:0 20px 60px rgba(0,0,0,.5);padding:26px 28px 24px}
.help-box h2{font-size:16px;margin:0 0 16px}
.help-tbl{width:100%;border-collapse:collapse;font-size:12.5px}
.help-tbl td{padding:6px 4px;color:var(--soft);vertical-align:top}
.help-tbl td:first-child{width:96px;white-space:nowrap}
.help-tbl kbd{display:inline-block;font:inherit;font-size:10.5px;font-weight:600;color:var(--soft);background:var(--panel,#0e1319);border:1px solid var(--line);border-bottom-width:2px;border-radius:5px;padding:2px 7px;min-width:16px;text-align:center}

/* ===== Radiopharmaceutical Compendium ===== */
#compendium-root{margin:22px 0 8px}
.cmp-controls{display:flex;flex-direction:column;gap:9px;margin-bottom:14px}
.cmp-search{width:100%;font:inherit;font-size:13px;color:var(--soft);background:var(--panel,#0e1319);border:1px solid var(--line);border-radius:8px;padding:9px 12px}
.cmp-chips{display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.cmp-lbl{font-size:9.5px;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--faint);margin-right:4px}
.cmp-chip{font:inherit;font-size:11px;font-weight:600;color:var(--soft);background:transparent;border:1px solid var(--line);border-radius:20px;padding:3px 11px;cursor:pointer;transition:.13s}
.cmp-chip:hover{border-color:var(--ac);color:var(--ac)}
.cmp-chip.on{background:var(--ac);border-color:var(--ac);color:var(--on-ac)}
.cmp-count{font-size:11px;color:var(--faint);margin-bottom:8px}
.cmp-tbl-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:10px}
.cmp-tbl{width:100%;border-collapse:collapse;font-size:12px;min-width:640px}
.cmp-tbl th{text-align:left;font-size:9.5px;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--faint);padding:9px 12px;border-bottom:1px solid var(--line);background:var(--panel,#0e1319);position:sticky;top:0}
.cmp-tbl td{padding:8px 12px;border-bottom:1px solid var(--line);color:var(--soft);vertical-align:top;line-height:1.45}
.cmp-tbl tr:last-child td{border-bottom:0}
.cmp-tbl tbody tr:hover{background:color-mix(in srgb,var(--ac) 6%,transparent)}
.cmp-agent{font-weight:600;white-space:nowrap}
.cmp-agent a{color:var(--ac);cursor:pointer;text-decoration:none}
.cmp-agent a:hover{text-decoration:underline}
.cmp-tgt{color:var(--faint)}
.cmp-mod{font-size:10px;font-weight:700;padding:1px 7px;border-radius:5px;text-transform:uppercase;letter-spacing:.03em}
.m-pet{color:#5aa9e6;background:color-mix(in srgb,#5aa9e6 15%,transparent)}
.m-spect{color:#c9a227;background:color-mix(in srgb,#c9a227 15%,transparent)}
.m-therapy{color:#e5716f;background:color-mix(in srgb,#e5484d 15%,transparent)}
.cmp-badge{font-size:10px;font-weight:600;padding:1px 8px;border-radius:20px;white-space:nowrap}
.cmp-chip.c-perfusion,.cmp-badge.c-perfusion{color:#e0645f;background:color-mix(in srgb,#e0645f 15%,transparent)}
.cmp-chip.c-metabolism,.cmp-badge.c-metabolism{color:#e29a3c;background:color-mix(in srgb,#e29a3c 15%,transparent)}
.cmp-chip.c-receptor,.cmp-badge.c-receptor{color:#8f7fe0;background:color-mix(in srgb,#8f7fe0 15%,transparent)}
.cmp-chip.c-antigen,.cmp-badge.c-antigen{color:#c56fd0;background:color-mix(in srgb,#c56fd0 15%,transparent)}
.cmp-chip.c-transporter,.cmp-badge.c-transporter{color:#3fae9f;background:color-mix(in srgb,#3fae9f 15%,transparent)}
.cmp-chip.c-bone,.cmp-badge.c-bone{color:#9aa5b1;background:color-mix(in srgb,#9aa5b1 16%,transparent)}
.cmp-chip.c-renal,.cmp-badge.c-renal{color:#4c9be8;background:color-mix(in srgb,#4c9be8 15%,transparent)}
.cmp-chip.c-hepatobiliary,.cmp-badge.c-hepatobiliary{color:#5cb87a;background:color-mix(in srgb,#5cb87a 15%,transparent)}
.cmp-chip.c-phagocytic,.cmp-badge.c-phagocytic{color:#7f9c4a;background:color-mix(in srgb,#7f9c4a 16%,transparent)}
.cmp-chip.c-inflammation,.cmp-badge.c-inflammation{color:#d98a4a;background:color-mix(in srgb,#d98a4a 15%,transparent)}
.cmp-chip.c-amyloid,.cmp-badge.c-amyloid{color:#c98fb0;background:color-mix(in srgb,#c98fb0 15%,transparent)}
.cmp-chip.c-bloodpool,.cmp-badge.c-bloodpool{color:#d76b6b;background:color-mix(in srgb,#d76b6b 15%,transparent)}
.cmp-chip.c-embolic,.cmp-badge.c-embolic{color:#c98a5a;background:color-mix(in srgb,#c98a5a 15%,transparent)}
.hy-on #compendium-root .cmp-controls{display:none}

/* ===== personal layer: bookmark star + My Atlas ===== */
.page{position:relative}
.bm{position:absolute;top:2px;right:0;font-size:20px;line-height:1;background:transparent;border:0;color:var(--line);cursor:pointer;padding:2px 4px;transition:.15s}
.bm:hover{color:var(--ac)}
.bm.on{color:var(--ac)}
.hy-on .bm{display:none}
@media(max-width:1000px){.bm{top:0;right:0}}
.ma-overall{display:flex;align-items:baseline;gap:12px;margin:2px 0 20px}
.ma-big{font-size:38px;font-weight:800;letter-spacing:-.02em;color:var(--soft)}
.ma-big span{font-size:20px;color:var(--faint);font-weight:600}
.ma-osub{font-size:12px;color:var(--faint)}
.ma-sec{margin-bottom:20px}
.ma-h{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--faint);margin-bottom:10px;padding-bottom:6px;border-bottom:1px solid var(--line)}
.ma-bar{margin-bottom:9px}
.ma-bl{display:flex;justify-content:space-between;font-size:11.5px;color:var(--soft);margin-bottom:4px}
.ma-bl span:last-child{color:var(--faint);font-weight:600}
.ma-track{height:6px;background:var(--panel,#0e1319);border:1px solid var(--line);border-radius:20px;overflow:hidden}
.ma-fill{height:100%;background:var(--ac);border-radius:20px;transition:width .3s}
.ma-item{margin-bottom:5px;font-size:12.5px}
.ma-item a{color:var(--ac);cursor:pointer;text-decoration:none}
.ma-item a:hover{text-decoration:underline}
.ma-empty{font-size:12px;color:var(--faint);font-style:italic;margin:2px 0}
.ma-reset{margin-top:22px;text-align:right}
.ma-reset button{font:inherit;font-size:11px;font-weight:600;color:var(--faint);background:transparent;border:1px solid var(--line);border-radius:7px;padding:6px 12px;cursor:pointer}
.ma-reset button:hover{color:#e5716f;border-color:color-mix(in srgb,#e5484d 45%,var(--line))}
#myatlas .study-box{max-width:560px}

/* ===== modebar 2x2 + backlinks + A–Z index ===== */
.modebar{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.hybtn{padding:7px 6px}
.related.backrefs{margin-top:10px}
.related.backrefs .related-h{color:var(--faint)}
.idx-box{max-width:600px;display:flex;flex-direction:column;max-height:82vh}
.idx-jump{display:flex;flex-wrap:wrap;gap:2px;margin:12px 0 6px}
.idx-jump a{font-size:11px;font-weight:600;color:var(--ac);cursor:pointer;padding:2px 6px;border-radius:5px;text-decoration:none}
.idx-jump a:hover{background:color-mix(in srgb,var(--ac) 15%,transparent)}
.idx-count{font-size:11px;color:var(--faint);margin-bottom:8px}
.idx-list{overflow-y:auto;flex:1;border-top:1px solid var(--line);padding-top:6px}
.idx-letter{font-size:13px;font-weight:800;color:var(--ac);margin:12px 0 6px;position:sticky;top:0;background:var(--card,#12171e);padding:3px 0}
.idx-item{display:flex;justify-content:space-between;align-items:baseline;gap:12px;padding:4px 2px;border-bottom:1px solid color-mix(in srgb,var(--line) 55%,transparent)}
.idx-item a{color:var(--soft);cursor:pointer;text-decoration:none;font-size:13px}
.idx-item a:hover{color:var(--ac)}
.idx-ch{font-size:10px;color:var(--faint);white-space:nowrap;text-transform:uppercase;letter-spacing:.03em}

/* ===== curated related (typed) ===== */
.related.curated .related-h{color:var(--ac)}
.cur-row{display:flex;flex-wrap:wrap;align-items:baseline;gap:6px;margin:6px 0}
.cur-lbl{font-size:9.5px;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--faint);min-width:96px;flex-shrink:0}
.cur-chips{display:flex;flex-wrap:wrap;gap:5px}
/* ===== figures + lightbox ===== */
.fig{margin:22px 0;cursor:zoom-in;border:1px solid var(--line);border-radius:12px;padding:18px 18px 14px;background:var(--card);transition:border-color .15s,box-shadow .15s;max-width:560px}
.fig:hover{border-color:var(--ac-l);box-shadow:0 4px 18px rgba(74,58,130,.06)}
.fig-media{display:flex;justify-content:center;align-items:center}
.fig-media img,.fig-media svg{max-width:100%;height:auto;border-radius:6px}
.fig-media svg{max-width:500px}
/* uniform, polished stroke rendering across every hand-drawn figure */
.fig-media svg path,.fig-media svg line,.fig-media svg polyline,.fig-media svg circle,.fig-media svg rect{stroke-linecap:round;stroke-linejoin:round}
.fig figcaption{margin-top:13px;font-size:11.5px;color:var(--faint);line-height:1.55;text-align:center;max-width:62ch;margin-left:auto;margin-right:auto}
.fig figcaption b{color:var(--soft)}
.fig-credit{display:inline-block;margin-left:6px;font-style:italic;opacity:.85}
.hy-on .fig{display:none}
.lb-ov{position:fixed;inset:0;z-index:140;background:rgba(20,23,27,.86);backdrop-filter:blur(3px);display:none;align-items:center;justify-content:center;padding:30px}
.lb-ov.on{display:flex}
.lb-inner{position:relative;max-width:94vw;max-height:92vh;display:flex;flex-direction:column;align-items:center;gap:14px}
.lb-media{max-width:94vw;max-height:80vh;overflow:auto;background:var(--card);border-radius:10px;padding:12px}
.lb-media img,.lb-media svg{max-width:88vw;max-height:76vh;height:auto;display:block}
.lb-cap{color:#F6F7F9;font-size:12.5px;line-height:1.5;text-align:center;max-width:70ch}
.lb-cap b{color:#fff}
.lb-inner .study-x{position:absolute;top:-6px;right:-6px;background:var(--card)}

/* ===== inline glossary tooltips (JS-positioned, viewport-clamped, never clipped) ===== */
.gloss{border-bottom:1px dotted var(--ac-l);cursor:help}
#gtip{position:fixed;z-index:200;max-width:280px;background:#1f242c;color:#F6F7F9;border:1px solid rgba(255,255,255,.14);
 font-size:11.5px;font-weight:400;line-height:1.5;padding:9px 12px;border-radius:9px;
 box-shadow:0 8px 26px rgba(0,0,0,.4);pointer-events:none;display:none;opacity:0;transition:opacity .12s}
#gtip.on{opacity:1}

/* ===== command palette ===== */
.pal-ov{position:fixed;inset:0;z-index:150;background:rgba(20,23,27,.5);backdrop-filter:blur(2px);display:none;align-items:flex-start;justify-content:center;padding:12vh 16px 16px}
.pal-ov.on{display:flex}
.pal-box{width:100%;max-width:560px;background:var(--card);border:1px solid var(--line);border-radius:13px;box-shadow:0 24px 64px rgba(20,23,27,.32);overflow:hidden}
.pal-in{width:100%;font:inherit;font-size:15px;color:var(--ink);background:transparent;border:0;border-bottom:1px solid var(--line);padding:15px 18px;outline:none}
.pal-list{max-height:52vh;overflow-y:auto;padding:6px}
.pal-item{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:8px;cursor:pointer}
.pal-item.sel{background:var(--ac-t)}
.pal-ic{color:var(--ac);font-size:12px;width:12px;flex-shrink:0}
.pal-t{flex:1;font-size:13.5px;color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.pal-item.sel .pal-t{font-weight:600}
.pal-g{font-size:9px;font-weight:700;text-transform:uppercase;letter-spacing:.04em;color:var(--faint);flex-shrink:0}
.pal-empty{padding:16px;text-align:center;color:var(--faint);font-size:12.5px}
.pal-foot{display:flex;gap:16px;padding:9px 14px;border-top:1px solid var(--line);font-size:10.5px;color:var(--faint)}
.pal-foot kbd{font-size:9.5px;font-weight:600;color:var(--soft);background:var(--panel);border:1px solid var(--line);border-radius:4px;padding:1px 5px;margin-right:2px}

/* ===== verifiable reference links in evidence ===== */
.cite-link{color:var(--ac);text-decoration:none;font-weight:700}
.cite-link:hover{text-decoration:underline}

/* ===== authorship & provenance layer (pillars 3 & 4) ===== */
.provbar{display:flex;flex-wrap:wrap;align-items:center;gap:6px 10px;margin:2px 0 20px;
  padding:9px 14px;border:1px solid var(--ac-l);background:var(--ac-t);border-radius:9px}
.provbar-i{color:var(--ac);font-size:11px;line-height:1}
.provbar-t{font-family:var(--m);font-size:10px;font-weight:700;letter-spacing:.06em;
  text-transform:uppercase;color:var(--ac)}
.provbar-chips{display:inline-flex;flex-wrap:wrap;gap:0;align-items:center}
.provbar .rel-chip{margin:2px 6px 2px 0;background:var(--card)}
.artmeta{margin:2px 0 22px;padding:13px 16px;border:1px solid var(--line);border-left:3px solid var(--ac);
  background:var(--card);border-radius:0 8px 8px 0}
.artmeta-row{display:flex;gap:12px;align-items:baseline;font-size:13px;margin:4px 0}
.artmeta-k{font-family:var(--m);font-size:9.5px;font-weight:700;text-transform:uppercase;
  letter-spacing:.06em;color:var(--faint);min-width:72px;flex-shrink:0;padding-top:4px}
.artmeta-v{color:var(--soft)}
.artmeta-v .rel-chip{margin:2px 6px 2px 0}
.authhead{margin:2px 0 22px;padding:14px 16px;border:1px solid var(--ac-l);
  background:var(--ac-t);border-radius:9px}
.authhead-cred{font-size:14px;font-weight:600;color:var(--ink)}
.authhead-aff{font-size:13px;color:var(--soft);margin-top:2px}
.authhead-links{font-size:12px;margin-top:8px}
.related.informs .related-h,.related.contribs .related-h{color:var(--ac)}
.hy-on .provbar{margin-bottom:14px}
/* iPhone: keep ALL text inputs >=16px so Safari never zooms on focus. Placed at
   end-of-file so it wins over earlier .cmp-search / .pal-in font-size rules. */
@media(max-width:1000px){
 .sb input,.t-in input,.t-in select,.cmp-search,.pal-in,textarea,select,
 input[type=number],input[type=text],input[type=search],input[type=email]{font-size:16px}
}

/* ================= Findability: hero search, breadcrumbs, card heights ================= */
.home-search{position:relative;margin:18px 0 8px;max-width:660px}
.hs-mag{position:absolute;left:16px;top:15px;color:var(--faint);pointer-events:none}
.hs-input{width:100%;font:inherit;font-size:17px;padding:14px 16px 14px 46px;border:1.5px solid var(--line);border-radius:12px;background:var(--card);color:var(--ink)}
.hs-input::placeholder{color:var(--faint)}
.hs-input:focus{outline:none;border-color:var(--ac);box-shadow:0 0 0 3px var(--ac-t)}
.hsr{display:none;margin-top:8px;border:1px solid var(--line);border-radius:12px;background:var(--card);overflow:hidden;max-width:660px;box-shadow:0 10px 34px rgba(20,23,27,.10);max-height:60vh;overflow-y:auto}
.hsr.on{display:block}
.hsr-item{display:block;padding:11px 15px;border-top:1px solid var(--line2);cursor:pointer;text-decoration:none;color:var(--ink)}
.hsr-item:first-child{border-top:0}
.hsr-item:hover{background:var(--ac-t)}
.hsr-g{display:block;font-family:var(--m);font-size:8.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--ac);font-weight:700}
.hsr-t{display:block;font-weight:600;font-size:14px;margin-top:2px}
.hsr-s{display:block;font-size:12px;color:var(--faint);line-height:1.4}
.hsr-empty{padding:14px 15px;font-size:13px;color:var(--soft)}
/* breadcrumbs on every content page */
.crumbs{display:flex;align-items:center;flex-wrap:wrap;gap:7px;font-family:var(--m);font-size:9.5px;letter-spacing:.09em;text-transform:uppercase;font-weight:700;margin-bottom:7px}
.crumbs .crumb-home{color:var(--ac);cursor:pointer;text-decoration:none}
.crumbs .crumb-home:hover{text-decoration:underline}
.crumbs .csep{color:var(--faint);opacity:.55}
.crumbs .crumb-part{color:var(--faint)}
.crumbs .crumb-ch{color:var(--soft)}
/* uniform browse-card heights even when titles wrap */
.hcard{display:flex;flex-direction:column;min-height:106px}
.hcard-n{margin-top:auto;padding-top:6px}

/* Persistent tracer colour dots on tags (consistent per agent site-wide) */
.tag.tracer::before{content:"";display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--tc);margin-right:5px;vertical-align:middle}
/* Inline tracer colour dot used in comparison tables */
.tdot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--tc);margin-right:6px;vertical-align:middle;flex:0 0 auto}