/* ============================================================================
   research-papers.css  ·  Econstellar "Research Papers" section
   Dark Econstellar OS tokens (verbatim) + ONE addition: --serif Source Serif 4.
   Three-way type split: --disp Orbitron = chrome · --serif = editorial ·
   --mono JetBrains = metadata. Restraint everywhere except the Tier-1 verify strip.
   Shared by research-papers.html, papers/<slug>.html, papers/entronomics.html,
   papers/viewer.html.  Relative-path site at /econstellar/ (see build notes).
   Fonts are requested once via a preconnected <link> in each page <head>
   (better first paint); this stylesheet intentionally carries no @import so
   the font request is never duplicated.
   ========================================================================== */

:root{
  --bg:#000; --surface:rgba(8,10,14,.92); --surface2:rgba(12,18,28,.92);
  --border:rgba(0,212,255,.15); --hot:rgba(0,255,136,.32); --rule:rgba(255,255,255,.06);
  --text:#fff; --mid:#c9d1d9; --dim:#6b7280;
  --cyan:#00d4ff; --green:#00ff88; --amber:#f59e0b; --red:#ef4444;
  --amber-line:rgba(245,158,11,.4);
  --sans:'Space Grotesk',sans-serif; --mono:'JetBrains Mono',monospace; --disp:'Orbitron',sans-serif;
  --serif:'Source Serif 4',ui-serif,Georgia,serif;              /* the one deliberate addition */
  --clip:polygon(0 12px,12px 0,100% 0,100% calc(100% - 12px),calc(100% - 12px) 100%,0 100%);
}

/* ---- reset + base ---- */
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--sans);line-height:1.55;
  background-image:radial-gradient(circle at 15% 8%,rgba(0,212,255,.06),transparent 42%),
                   radial-gradient(circle at 85% 74%,rgba(0,255,136,.05),transparent 45%);
  background-attachment:fixed}
a{color:var(--cyan);text-decoration:none} a:hover{text-decoration:underline}
img{max-width:100%;display:block}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px;top:0}
.skip:focus{left:8px;top:8px;z-index:50;background:var(--surface2);border:1px solid var(--cyan);
  border-radius:8px;padding:.5rem .8rem;font-family:var(--mono);font-size:.8rem}

/* ---- nav (Pattern A) ---- */
nav{display:flex;flex-wrap:wrap;gap:1rem;align-items:center;padding:.9rem 20px;border-bottom:1px solid var(--rule);
  font-family:var(--mono);font-size:.78rem;position:sticky;top:0;background:rgba(0,0,0,.7);
  backdrop-filter:blur(8px);z-index:10}
nav .brand{color:var(--green);font-weight:600;letter-spacing:.5px} nav .sp{flex:1}
nav a{color:var(--dim)} nav a:hover{color:var(--mid)} nav a[aria-current="page"]{color:var(--cyan)}
.os-kbtn{font-family:var(--mono);font-size:.7rem;background:none;border:1px solid rgba(0,212,255,.25);
  color:var(--cyan);border-radius:6px;cursor:pointer;padding:.1rem .5rem}
#os-strip{font-family:var(--mono);font-size:.72rem;color:var(--dim)}

/* ---- focus + motion floor (global a11y) ---- */
a:focus-visible,button:focus-visible,select:focus-visible,[tabindex]:focus-visible{
  outline:2px solid var(--cyan);outline-offset:3px;border-radius:4px}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;
    transition-duration:.001ms!important;scroll-behavior:auto!important}
}

/* ---- hero / section chrome ---- */
header{padding:3rem 0 1rem}
.eyebrow{font-family:var(--mono);font-size:.72rem;letter-spacing:2.5px;text-transform:uppercase;color:var(--cyan)}
h1{font-family:var(--disp);font-size:clamp(2rem,5vw,3.4rem);margin:.6rem 0 .5rem;line-height:1.04}
.lede{font-family:var(--serif);font-size:1.14rem;line-height:1.5;color:var(--mid);max-width:64ch}
.live-pill{display:inline-flex;align-items:center;gap:.45rem;font-family:var(--mono);font-size:.72rem;
  color:var(--green);border:1px solid var(--hot);border-radius:999px;padding:.25rem .7rem;margin-top:.9rem}
.dot{width:8px;height:8px;border-radius:50%;background:var(--green);box-shadow:0 0 8px var(--green);animation:p 1.4s infinite}
@keyframes p{0%,100%{opacity:1}50%{opacity:.3}}
section{margin:2.4rem 0}
.sec-h{font-family:var(--disp);font-size:1.3rem;margin:0 0 .2rem}
.sec-s{color:var(--dim);font-family:var(--mono);font-size:.76rem;margin-bottom:1rem;max-width:70ch}

/* theme section header (dark port of man/index.html grouping precedent) */
.theme{margin:2.6rem 0 1.2rem;border-top:1px solid var(--rule);padding-top:1.4rem;scroll-margin-top:70px}
.theme__eyebrow{font-family:var(--mono);font-size:.7rem;letter-spacing:1.6px;text-transform:uppercase;color:var(--cyan)}
.theme__label{font-family:var(--disp);font-size:1.15rem;color:var(--green);margin:.28rem 0 .3rem}
.theme__blurb{font-family:var(--serif);color:var(--mid);font-size:1rem;line-height:1.5;max-width:72ch}

/* jump-nav (anchor chips; no JS) */
.jump{display:flex;flex-wrap:wrap;gap:.4rem;margin:1rem 0 .4rem}
.jump a{font-family:var(--mono);font-size:.72rem;border:1px solid var(--border);border-radius:999px;
  padding:.28rem .6rem;color:var(--mid)}
.jump a:hover{border-color:var(--cyan);color:#fff;text-decoration:none}

/* ---- buttons ---- */
.btn{font-family:var(--mono);font-size:.82rem;font-weight:600;padding:.6rem 1rem;border-radius:9px;cursor:pointer;
  border:1px solid var(--border);background:var(--surface2);color:var(--text);
  display:inline-flex;align-items:center;justify-content:center;gap:.45rem;text-align:center}
.btn:hover{text-decoration:none;filter:brightness(1.09)}
.btn.primary{color:#000;background:linear-gradient(90deg,var(--cyan),var(--green));border:none}
.btn.ghost{background:none}
.btn.live{color:var(--green);border-color:var(--hot)} .btn.live:hover{background:rgba(0,255,136,.08)}
.btn[disabled]{opacity:.5;cursor:not-allowed}

/* ---- chips (real information, not decoration) ---- */
.tag{font-family:var(--mono);font-size:.6rem;letter-spacing:1px;text-transform:uppercase;
  padding:.18rem .5rem;border-radius:999px;border:1px solid var(--border);color:var(--mid);white-space:nowrap}
.tag.live{color:var(--green);border-color:var(--hot)}
.tag.pre{color:var(--amber);border-color:var(--amber-line)}
.tag.pub{color:var(--cyan);border-color:rgba(0,212,255,.30)}
.publisher{font-family:var(--mono);font-size:.6rem;letter-spacing:1px;text-transform:uppercase;
  border:1px solid rgba(0,212,255,.30);border-radius:999px;padding:.16rem .5rem;color:var(--cyan)}
.year{font-family:var(--disp);font-size:.86rem;color:var(--dim)}      /* real chronology, not 01/02 */
.pages{font-family:var(--mono);font-size:.72rem;color:var(--dim)}

/* =====================================================================
   HUB: featured book, live spotlight, theme grids, cards
   ===================================================================== */

/* featured book - the LARGEST single element, outranks everything below */
.book-hero{display:grid;grid-template-columns:220px 1fr;gap:1.6rem;align-items:center;
  background:var(--surface);border:1px solid var(--border);clip-path:var(--clip);padding:1.6rem 1.7rem;margin:1.6rem 0}
.book-hero__cover{width:100%;border-radius:6px;border:1px solid var(--border);
  box-shadow:0 12px 40px -18px rgba(0,212,255,.4)}
.book-hero__eyebrow{font-family:var(--mono);font-size:.7rem;letter-spacing:2px;text-transform:uppercase;color:var(--cyan)}
.book-hero__title{font-family:var(--serif);font-weight:600;font-size:clamp(1.8rem,4vw,2.6rem);line-height:1.1;
  margin:.3rem 0 .2rem;text-wrap:balance}
.book-hero__sub{font-family:var(--serif);font-size:1.08rem;color:var(--mid);font-style:italic;margin:0 0 .7rem}
.book-hero__meta{font-family:var(--mono);font-size:.76rem;color:var(--dim);margin:.5rem 0}
.badge{font-family:var(--mono);font-size:.62rem;letter-spacing:1.5px;text-transform:uppercase;
  border-radius:999px;padding:.2rem .6rem;border:1px solid var(--amber-line);color:var(--amber)}
.book-hero__actions{display:flex;gap:.6rem;flex-wrap:wrap;margin-top:1rem}

/* live spotlight band - the edge; brightest, not biggest */
.spotlight{border:1px solid var(--hot);border-radius:14px;
  background:linear-gradient(180deg,rgba(0,255,136,.05),transparent 60%);padding:1.3rem;margin:1.6rem 0}
.spotlight__head{display:flex;align-items:center;gap:.6rem;flex-wrap:wrap;margin-bottom:.2rem}
.spotlight__grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin-top:1rem}
@media(max-width:720px){.spotlight__grid{grid-template-columns:1fr}}

/* card grid + base card (shared by all three tiers) */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:1rem}
.paper{background:var(--surface);border:1px solid var(--border);clip-path:var(--clip);
  padding:1.15rem 1.25rem;display:flex;flex-direction:column;gap:.5rem;transition:border-color .25s ease}
.paper:hover,.paper:focus-within{border-color:var(--cyan)}
.paper__top{display:flex;align-items:center;gap:.5rem;flex-wrap:wrap}
.paper__title{font-family:var(--serif);font-weight:600;font-size:1.12rem;line-height:1.24;color:var(--text);
  text-wrap:balance;margin:.1rem 0}
.paper__title a{color:inherit} .paper__title a:hover{color:var(--cyan);text-decoration:none}
.paper__authors{font-family:var(--mono);font-size:.72rem;color:var(--mid)}
.paper__abstract{font-family:var(--serif);font-size:.95rem;line-height:1.5;color:var(--mid);max-width:68ch;
  display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden}
.paper__meta{font-family:var(--mono);font-size:.72rem;color:var(--dim);display:flex;gap:.8rem;flex-wrap:wrap}
.paper__actions{display:flex;gap:.5rem;flex-wrap:wrap;margin-top:auto;padding-top:.4rem}
.paper__ribbon{font-family:var(--mono);font-size:.68rem;color:var(--dim)}
.paper__ribbon a{color:var(--green)}

/* the ONLY loud card: live-reproducible */
.paper--live{border-color:var(--hot);box-shadow:0 0 0 1px rgba(0,255,136,.08),0 0 30px -14px var(--green)}
.paper--live:hover,.paper--live:focus-within{border-color:var(--green)}

/* condensed verdict echo (hub live cards + spotlight) */
.echo{display:inline-flex;align-items:center;gap:.4rem;font-family:var(--mono);font-size:.7rem;color:var(--green);
  border:1px solid var(--hot);border-radius:999px;padding:.2rem .6rem;width:max-content}

/* Theme-III cross-reference strip (live papers live in the spotlight; pointer here) */
.xref{display:flex;gap:.6rem;flex-wrap:wrap;align-items:center;font-family:var(--mono);font-size:.74rem;
  color:var(--dim);border:1px dashed var(--border);border-radius:10px;padding:.6rem .8rem;margin-bottom:1rem}
.xref a{color:var(--cyan)}

/* =====================================================================
   DETAIL PAGE: two-column main + sticky action rail
   ===================================================================== */
.detail{display:grid;grid-template-columns:1fr 300px;gap:2rem;align-items:start;margin:1.6rem 0}
@media(max-width:820px){.detail{grid-template-columns:1fr}}
.detail__main{min-width:0}
.detail__eyebrow{display:flex;gap:.5rem;flex-wrap:wrap;align-items:center;margin-bottom:.5rem}
.paper-title{font-family:var(--serif);font-weight:600;letter-spacing:-.01em;
  font-size:clamp(1.5rem,3.4vw,2.3rem);line-height:1.16;color:var(--text);text-wrap:balance;margin:.2rem 0 .5rem}
.byline{font-family:var(--mono);font-size:.8rem;color:var(--mid)}
.citation{font-family:var(--mono);font-size:.76rem;color:var(--dim);margin:.3rem 0 1.2rem}
.citation em{color:var(--mid);font-style:italic}
.abstract{font-family:var(--serif);font-size:1.075rem;line-height:1.62;color:var(--mid);max-width:70ch;
  border-left:2px solid var(--cyan);padding:.15rem 0 .15rem 1.25rem;margin:1.2rem 0}   /* never full-bleed */
.h-res{font-family:var(--disp);font-size:1.05rem;margin:1.6rem 0 .6rem}
.keyres{font-family:var(--serif);font-size:1rem;line-height:1.55;color:var(--mid);max-width:70ch;
  padding-left:1.1rem;margin:.6rem 0}
.keyres li{margin:.35rem 0}
.crossref{font-family:var(--mono);font-size:.76rem;color:var(--dim);margin-top:1.2rem;
  border-top:1px solid var(--rule);padding-top:.9rem}
.crossref a{color:var(--cyan)}

/* sticky action rail */
.rail{position:sticky;top:70px;display:flex;flex-direction:column;gap:.7rem;
  background:var(--surface);border:1px solid var(--border);clip-path:var(--clip);padding:1.1rem}
@media(max-width:820px){.rail{position:static}}
.rail .btn{width:100%}
.rail__label{font-family:var(--mono);font-size:.64rem;letter-spacing:1px;text-transform:uppercase;color:var(--dim);margin-top:.3rem}

/* version switcher (twinned canonicals) - segmented control */
.vswitch{display:flex;border:1px solid var(--border);border-radius:9px;overflow:hidden}
.vswitch button{flex:1;background:none;border:none;border-radius:0;color:var(--dim);
  font-family:var(--mono);font-size:.7rem;padding:.5rem .4rem;cursor:pointer}
.vswitch button[aria-pressed="true"]{background:rgba(0,212,255,.1);color:var(--cyan)}
.vswitch button+button{border-left:1px solid var(--border)}

/* cite box */
.cite{font-family:var(--mono);font-size:.72rem;color:var(--mid);background:rgba(0,0,0,.3);
  border:1px solid var(--border);border-radius:8px;padding:.7rem;line-height:1.5;word-break:break-word}
.copyok{color:var(--green);font-family:var(--mono);font-size:.68rem}

/* =====================================================================
   VERIFICATION STRIP - ported verbatim from reproduce.html (Tier-1 ONLY).
   Rendered STATIC from known values; NO CE/NX calls on paper pages.
   ===================================================================== */
.verify{background:var(--surface);border:1px solid var(--border);clip-path:var(--clip);padding:1.2rem 1.3rem;margin:1.4rem 0}
.verify .h2{font-family:var(--disp);font-size:1.12rem;margin:0 0 .2rem;display:flex;align-items:baseline;gap:.6rem;flex-wrap:wrap}
.verify .sub{font-family:var(--mono);font-size:.74rem;color:var(--dim);margin-bottom:1rem}
.cols{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
@media(max-width:680px){.cols{grid-template-columns:1fr}}
.panel{background:var(--surface2);border:1px solid var(--border);border-radius:10px;padding:1rem}
.panel h3{font-family:var(--mono);font-size:.74rem;text-transform:uppercase;letter-spacing:1px;margin:0 0 .8rem;color:var(--dim)}
.panel.live h3{color:var(--green)} .panel.pub h3{color:var(--cyan)} .panel.pend h3{color:var(--amber)}
.barrow{display:grid;grid-template-columns:34px 1fr 64px;align-items:center;gap:.5rem;margin:.34rem 0;font-family:var(--mono);font-size:.74rem}
.track{height:10px;background:rgba(255,255,255,.06);border-radius:5px;overflow:hidden}
.fill{height:100%;background:linear-gradient(90deg,var(--cyan),var(--green));transition:width .6s ease}
.fill.pub{background:linear-gradient(90deg,rgba(0,212,255,.55),rgba(0,212,255,.85))}
.kpirow{display:grid;grid-template-columns:repeat(auto-fit,minmax(96px,1fr));gap:.6rem;margin-top:.9rem}
.kpi{background:rgba(0,0,0,.3);border:1px solid var(--border);border-radius:8px;padding:.6rem;text-align:center}
.kpi .v{font-family:var(--mono);font-size:1.18rem;font-weight:600;color:var(--cyan)} .kpi .v.g{color:var(--green)}
.kpi .c{font-family:var(--mono);font-size:.62rem;color:var(--dim);margin-top:.25rem;text-transform:uppercase;letter-spacing:.5px}
.verdict{font-family:var(--mono);font-size:.84rem;padding:.6rem .9rem;border-radius:8px;margin:1rem 0 .2rem;text-align:center}
.verdict.g{background:rgba(0,255,136,.1);border:1px solid var(--hot);color:var(--green)}
.verdict.n{background:rgba(245,158,11,.08);border:1px solid var(--amber-line);color:var(--amber)}
.note{font-family:var(--mono);font-size:.72rem;color:var(--dim);margin-top:.6rem;max-width:74ch}

/* =====================================================================
   VIEWER (papers/viewer.html) - custom PDF.js chrome
   ===================================================================== */
.viewer{display:flex;flex-direction:column;height:100vh;background:var(--bg)}
.vtoolbar{position:sticky;top:0;z-index:5;display:flex;align-items:center;gap:.7rem;flex-wrap:wrap;
  padding:.6rem .9rem;border-bottom:1px solid var(--rule);background:rgba(0,0,0,.8);backdrop-filter:blur(8px)}
.vtitle{font-family:var(--serif);font-weight:600;font-size:.95rem;color:var(--text);
  max-width:38ch;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.vspace{flex:1}
.vpage{font-family:var(--mono);font-size:.76rem;color:var(--mid);min-width:5ch;text-align:center}
.vbtn{font-family:var(--mono);font-size:.74rem;background:var(--surface2);color:var(--text);
  border:1px solid var(--border);border-radius:7px;padding:.35rem .55rem;cursor:pointer}
.vbtn:hover{filter:brightness(1.1)}
.vbody{flex:1;display:grid;grid-template-columns:150px 1fr;min-height:0}
@media(max-width:640px){.vbody{grid-template-columns:1fr}.vthumbs{display:none}}
.vthumbs{overflow-y:auto;border-right:1px solid var(--rule);padding:.6rem;display:flex;flex-direction:column;gap:.5rem}
.vthumb{border:1px solid var(--border);border-radius:6px;cursor:pointer;background:none;padding:0;overflow:hidden}
.vthumb[aria-current="true"]{border-color:var(--cyan);box-shadow:0 0 0 1px var(--cyan)}
.vthumb canvas{display:block;width:100%}
.vthumb .n{font-family:var(--mono);font-size:.6rem;color:var(--dim);text-align:center;padding:.2rem}
.vscroll{overflow-y:auto;padding:1.2rem;display:flex;flex-direction:column;align-items:center;gap:1rem;scroll-behavior:smooth}
.vscroll canvas{max-width:100%;box-shadow:0 8px 30px -16px #000;border:1px solid var(--rule)}
.vfallback{max-width:52ch;margin:3rem auto;text-align:center;font-family:var(--sans);color:var(--mid)}
.vfallback .btn{margin:.4rem}

/* ---- footer + author masthead ---- */
.foot{font-family:var(--mono);font-size:.74rem;color:var(--dim);border-top:1px solid var(--rule);
  margin-top:2.6rem;padding:1.4rem 0 2.6rem;line-height:1.9}
.foot a{color:var(--cyan)}
.masthead{display:flex;gap:1.2rem;align-items:center;flex-wrap:wrap;border-top:1px solid var(--rule);
  margin-top:2.4rem;padding-top:1.6rem}
.masthead img{width:76px;height:76px;border-radius:50%;border:1px solid var(--border);object-fit:cover}
.masthead .bio{font-family:var(--serif);font-size:.98rem;color:var(--mid);max-width:66ch;line-height:1.55}
.masthead .bio b{color:var(--text);font-family:var(--sans)}

/* =====================================================================
   CONTROLS - tier filter + title search (progressive enhancement;
   degrades to all-shown when JS is off; the [hidden] rules only bite once JS runs)
   ===================================================================== */
.controls{display:flex;gap:.6rem;flex-wrap:wrap;align-items:center;margin:.4rem 0 .2rem}
.controls input[type=search]{flex:1;min-width:180px;font-family:var(--mono);font-size:.8rem;color:var(--text);
  background:var(--surface2);border:1px solid var(--border);border-radius:8px;padding:.5rem .7rem}
.filter{display:flex;gap:.3rem;flex-wrap:wrap}
.filter button{font-family:var(--mono);font-size:.72rem;color:var(--dim);background:none;border:1px solid var(--border);
  border-radius:999px;padding:.3rem .7rem;cursor:pointer}
.filter button[aria-pressed="true"]{color:var(--cyan);border-color:var(--cyan);background:rgba(0,212,255,.08)}
.count{font-family:var(--mono);font-size:.72rem;color:var(--dim);margin-left:auto}
.paper[hidden],.theme[hidden],.spotlight[hidden]{display:none}
.empty-note{font-family:var(--mono);font-size:.8rem;color:var(--dim);padding:1rem 0}

/* =====================================================================
   GATE-LOCKED working-paper treatment ("Full version coming soon").
   The access-gated look of a non-open-access journal page, on-brand and
   honestly labelled: no "subscribe / paid / buy / access" language.
   ===================================================================== */
.lockline{display:inline-flex;align-items:center;gap:.38rem;font-family:var(--mono);font-size:.68rem;
  color:var(--amber);border:1px solid var(--amber-line);border-radius:999px;padding:.18rem .55rem;white-space:nowrap}
.lockline svg{width:11px;height:11px;stroke:var(--amber);fill:none}

.locked{position:relative;border:1px solid var(--border);border-radius:12px;overflow:hidden;
  margin:1.4rem 0;background:var(--surface2)}
.locked__preview{position:relative;max-height:360px;overflow:hidden}
.locked__preview img{width:100%;display:block;filter:saturate(.9) contrast(.97)}
.locked__preview::after{content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(8,10,14,0) 0,rgba(8,10,14,.08) 34%,rgba(8,10,14,.78) 72%,var(--surface2) 100%)}
.locked__lockup{position:relative;z-index:2;margin-top:-150px;text-align:center;padding:0 1.2rem 1.7rem}
.locked__seal{width:54px;height:54px;margin:0 auto .7rem;border-radius:50%;display:flex;align-items:center;
  justify-content:center;border:1px solid var(--hot);background:rgba(0,255,136,.06);box-shadow:0 0 26px -6px var(--green)}
.locked__seal svg{width:22px;height:22px;stroke:var(--green);fill:none}
.locked__badge{font-family:var(--mono);font-size:.62rem;letter-spacing:2.5px;text-transform:uppercase;color:var(--green)}
.locked__title{font-family:var(--serif);font-weight:600;font-size:1.24rem;color:var(--text);margin:.28rem 0 .3rem}
.locked__note{font-family:var(--serif);font-size:.98rem;line-height:1.5;color:var(--mid);max-width:52ch;margin:0 auto 1.1rem}
.locked__actions{display:flex;gap:.6rem;flex-wrap:wrap;justify-content:center}

/* book "scholarly backbone" reading-map */
.backbone{margin:1.4rem 0}
.backbone__mv{border-top:1px solid var(--rule);padding:1rem 0 .3rem}
.backbone__eyebrow{font-family:var(--mono);font-size:.68rem;letter-spacing:1.6px;text-transform:uppercase;color:var(--cyan)}
.backbone__label{font-family:var(--disp);font-size:1.02rem;color:var(--green);margin:.24rem 0 .5rem}
.backbone__list{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:.3rem .9rem}
.backbone__list a{font-family:var(--serif);font-size:.96rem;color:var(--mid)}
.backbone__list a:hover{color:var(--cyan);text-decoration:none}
.toc-stub{border:1px dashed var(--border);border-radius:10px;padding:1rem 1.1rem;color:var(--dim);font-family:var(--mono);font-size:.8rem}

/* ---- responsive floor (~360px) ---- */
@media(max-width:640px){
  .book-hero{grid-template-columns:1fr}
  .book-hero__cover{max-width:180px}
  .grid{grid-template-columns:1fr}
  h1{font-size:clamp(1.7rem,7vw,2.2rem)}
  .locked__lockup{margin-top:-96px}
  .count{margin-left:0}
}

/* =====================================================================
   ADDED: arXiv preprint tag - card hover-zoom - theme navigator (dropdown
   mega-panel + sticky scroll-spy chips) - book table of contents - back-to-top.
   Motion respects the prefers-reduced-motion floor declared above.
   ===================================================================== */

/* arXiv / open-access preprint tag */
.tag.arxiv{color:var(--cyan);border-color:rgba(0,212,255,.42);text-transform:none;letter-spacing:.4px}

/* uniform card height: clamp the abstract; full text lives on the detail page */
.paper__abstract{display:-webkit-box;-webkit-line-clamp:5;-webkit-box-orient:vertical;overflow:hidden}

/* journal-grade abstracts: justified with automatic hyphenation (lang="en" set on <html>) */
.abstract,.paper__abstract{text-align:justify;text-justify:inter-word;-webkit-hyphens:auto;-ms-hyphens:auto;hyphens:auto}

/* hover zooms */
.paper{transition:transform .22s ease,box-shadow .22s ease}
.paper:hover{transform:translateY(-4px);box-shadow:0 20px 48px -24px rgba(0,212,255,.55)}
.book-hero__cover{transition:transform .4s cubic-bezier(.2,.7,.2,1),box-shadow .4s ease;transform-origin:center}
.book-hero__cover:hover{transform:scale(1.035) rotate(-.5deg);box-shadow:0 26px 70px -22px rgba(0,255,136,.42)}
.jump a{transition:transform .16s,border-color .16s,color .16s,background .16s}
.jump a:hover{transform:translateY(-1px)}

/* ---- theme navigator (hub) ---- */
.themenav-wrap{position:sticky;top:var(--navh,48px);z-index:9;display:flex;flex-wrap:wrap;gap:.5rem .8rem;
  align-items:center;margin:.2rem 0 1.4rem;padding:.6rem 0;
  background:linear-gradient(180deg,rgba(0,0,0,.94),rgba(0,0,0,.72));backdrop-filter:blur(10px)}
.themenav{position:relative}
.themenav__btn{list-style:none;cursor:pointer;display:inline-flex;align-items:center;gap:.5rem;
  font-family:var(--mono);font-size:.78rem;font-weight:600;color:var(--cyan);
  background:var(--surface2);border:1px solid var(--border);clip-path:var(--clip);padding:.55rem 1rem;
  transition:border-color .2s,box-shadow .2s,transform .2s}
.themenav__btn::-webkit-details-marker{display:none}
.themenav__btn::marker{content:''}
.themenav__btn:hover{border-color:var(--cyan);box-shadow:0 0 0 1px var(--hot),0 10px 30px -14px rgba(0,212,255,.6);transform:translateY(-1px)}
.themenav__ic{color:var(--green)}
.themenav__chev{color:var(--dim);transition:transform .25s,color .25s}
.themenav[open] .themenav__chev{transform:rotate(180deg);color:var(--cyan)}
.themenav__panel{position:absolute;left:0;top:calc(100% + .55rem);z-index:40;width:min(940px,90vw);
  display:grid;grid-template-columns:repeat(auto-fill,minmax(215px,1fr));gap:.1rem 1.6rem;
  background:var(--surface);border:1px solid var(--border);clip-path:var(--clip);padding:1.3rem 1.6rem;
  backdrop-filter:blur(16px);box-shadow:0 34px 90px -30px rgba(0,0,0,.92),0 0 0 1px rgba(0,212,255,.08);
  animation:tn-pop .22s ease both}
@keyframes tn-pop{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}
.themenav__col{padding:.55rem 0 .7rem;border-top:1px solid var(--rule);min-width:0}
.themenav__theme{display:flex;align-items:baseline;justify-content:space-between;gap:.5rem;
  font-family:var(--disp);font-size:.9rem;color:var(--green);padding:.22rem .35rem;border-radius:6px;
  transition:transform .18s,color .18s,background .18s}
.themenav__theme:hover{transform:translateX(3px);text-decoration:none;background:rgba(0,255,136,.07)}
.themenav__count{font-family:var(--mono);font-size:.66rem;color:var(--dim);border:1px solid var(--border);
  border-radius:999px;padding:0 .45rem;flex:none}
.themenav__papers{list-style:none;margin:.35rem 0 0;padding:0}
.themenav__papers a{display:block;font-family:var(--sans);font-size:.81rem;color:var(--mid);line-height:1.32;
  padding:.26rem .3rem .26rem .55rem;border-left:1px solid var(--rule);
  transition:color .16s,border-color .16s,transform .16s,background .16s}
.themenav__papers a:hover{color:#fff;border-color:var(--cyan);transform:translateX(3px);background:rgba(0,212,255,.06);text-decoration:none}

/* scroll-spy active state */
.jump a.is-active{border-color:var(--cyan);color:#fff;background:rgba(0,212,255,.1)}
.themenav__theme.is-active{color:#fff;background:rgba(0,255,136,.09)}

/* back-to-top */
.totop{position:fixed;right:18px;bottom:18px;z-index:30;width:44px;height:44px;display:grid;place-items:center;
  font-size:1.15rem;color:var(--cyan);background:var(--surface2);border:1px solid var(--border);border-radius:50%;
  cursor:pointer;opacity:0;pointer-events:none;transform:translateY(12px);
  transition:opacity .3s,transform .3s,border-color .2s,box-shadow .2s}
.totop.show{opacity:1;pointer-events:auto;transform:none}
.totop:hover{border-color:var(--cyan);box-shadow:0 0 0 1px var(--hot)}

/* ---- book table of contents ---- */
.toc{margin:1.2rem 0}
.toc__matter{list-style:none;margin:.2rem 0 1.2rem;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:.3rem .9rem}
.toc__matter li{font-family:var(--serif);font-size:1rem;color:var(--mid);border-left:2px solid var(--hot);padding:.15rem 0 .15rem .7rem}
.toc__backh{font-family:var(--mono);font-size:.7rem;letter-spacing:1.6px;text-transform:uppercase;color:var(--cyan);margin:.6rem 0 .2rem}
.toc__parts{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:1.4rem 2rem}
.toc__part{border-top:1px solid var(--rule);padding-top:.9rem}
.toc__part-h{display:flex;flex-wrap:wrap;align-items:baseline;gap:.6rem;margin-bottom:.5rem}
.toc__pnum{font-family:var(--mono);font-size:.66rem;letter-spacing:1.4px;text-transform:uppercase;color:var(--cyan);border:1px solid var(--border);border-radius:999px;padding:.05rem .5rem}
.toc__plabel{font-family:var(--disp);font-size:1rem;color:var(--green)}
.toc__chs{list-style:none;margin:0;padding:0}
.toc__chs li{display:grid;grid-template-columns:2.1rem 1fr;align-items:baseline;gap:.4rem;padding:.2rem 0;border-bottom:1px solid rgba(255,255,255,.03);transition:transform .15s}
.toc__n{font-family:var(--mono);font-size:.8rem;color:var(--dim);text-align:right}
.toc__t{font-family:var(--serif);font-size:1rem;color:var(--mid);line-height:1.35;transition:color .15s}
.toc__part:hover .toc__plabel{color:var(--cyan)}
.toc__chs li:hover{transform:translateX(3px)}
.toc__chs li:hover .toc__t{color:#fff}

@media(max-width:640px){
  .themenav-wrap{position:static;backdrop-filter:none;background:none}
  .themenav__panel{width:88vw;grid-template-columns:1fr;max-height:68vh;overflow:auto}
  .toc__parts{grid-template-columns:1fr}
  .totop{right:12px;bottom:12px}
}

/* =====================================================================
   PRINT / SAVE-AS-PDF - collapse the dark OS chrome into a clean, journal
   style monochrome article. Navigation and interactive controls are hidden;
   the title, byline, citation, abstract, key results, any verification data
   and the citation block are kept. Colours are darkened for paper contrast.
   ===================================================================== */
@media print{
  :root{--bg:#fff;--surface:#fff;--surface2:#fff;--border:#c2c2c2;--rule:#dcdcdc;--hot:#c2c2c2;
    --text:#000;--mid:#1c1c1c;--dim:#555;--cyan:#004a63;--green:#0a6b3f;--amber:#7a4a00}
  html{scroll-behavior:auto}
  body{background:#fff!important;color:#000;background-image:none!important;
    background-attachment:scroll!important;font-family:var(--serif);font-size:11pt;line-height:1.5}
  nav,.themenav-wrap,.controls,.ask,.totop,.skip,.foot,.os-kbtn,#os-strip,.jump,.xref,
  .paper__actions,.book-hero__actions,.rail .btn,.rail__label,.vswitch,.spotlight__head .tag,
  [data-copy],[data-share],.locked__preview,.locked__seal,.locked__actions{display:none!important}
  main,.wrap{max-width:none!important;margin:0!important;padding:0!important}
  .detail{display:block!important;grid-template-columns:1fr!important}
  .rail{position:static!important;border:none!important;box-shadow:none!important;
    clip-path:none!important;padding:0!important;margin-top:1rem}
  a{color:#000;text-decoration:none}
  *{box-shadow:none!important;text-shadow:none!important;filter:none!important;
    animation:none!important;transition:none!important}
  h1,.paper-title,.book-hero__title,.paper__title{color:#000}
  .abstract{border-left:2px solid #888;color:#111}
  .locked{border:1px solid #ccc}
  .locked__lockup{margin-top:0!important;text-align:left;padding:.5rem .2rem}
  .verify,.panel,.kpi,.paper,.toc__part,.spotlight,.book-hero,.locked{
    background:#fff!important;border-color:#ccc!important;clip-path:none!important;break-inside:avoid}
  .track{background:#eee!important}.fill{background:#8a8a8a!important}.fill.pub{background:#adadad!important}
  .cite{background:#f6f6f6!important;border-color:#ccc!important;color:#111}
  .kpi .v,.kpi .v.g{color:#004a63}
  .verdict.g,.verdict.n{border:1px solid #bbb;color:#111}
  .paper-title,.h-res,.theme__label{page-break-after:avoid}
}

/* =====================================================================
   LIGHT READING MODE - opt-in only (toggle in the nav; the default stays the
   dark Econstellar-OS brand). Scoped to html[data-theme="light"] so it never
   activates unless the reader asks for it. Token overrides plus the few
   hard-coded dark surfaces; every text pair meets WCAG AA (>=4.5:1 body).
   ===================================================================== */
html[data-theme="light"]{
  --bg:#f7f8fa;--surface:#ffffff;--surface2:#eef2f7;
  --border:rgba(3,105,161,.28);--hot:rgba(4,120,87,.42);--rule:rgba(15,23,42,.10);
  --text:#0f172a;--mid:#334155;--dim:#55607a;
  --cyan:#0369a1;--green:#047857;--amber:#9e4a08;--amber-line:rgba(158,74,8,.42);
}
html[data-theme="light"] body{background:var(--bg);
  background-image:radial-gradient(circle at 15% 8%,rgba(3,105,161,.05),transparent 42%),
                   radial-gradient(circle at 85% 74%,rgba(4,120,87,.045),transparent 45%)}
html[data-theme="light"] nav{background:rgba(247,248,250,.88)}
html[data-theme="light"] .btn.primary{color:#fff}
html[data-theme="light"] .cite,html[data-theme="light"] .kpi{background:#eef2f7}
html[data-theme="light"] .track{background:rgba(15,23,42,.08)}
html[data-theme="light"] .themenav-wrap{background:linear-gradient(180deg,rgba(247,248,250,.96),rgba(247,248,250,.78))}
html[data-theme="light"] .locked__preview::after{
  background:linear-gradient(180deg,rgba(238,242,247,0) 0,rgba(238,242,247,.1) 34%,rgba(238,242,247,.8) 72%,var(--surface2) 100%)}
html[data-theme="light"] .toc__chs li{border-bottom:1px solid rgba(15,23,42,.05)}

/* light/dark reading-mode toggle control (nav) */
.themetoggle{font-family:var(--mono);font-size:.86rem;line-height:1;background:none;
  border:1px solid rgba(0,212,255,.25);color:var(--cyan);border-radius:6px;cursor:pointer;
  padding:.16rem .42rem;transition:border-color .2s,color .2s}
.themetoggle:hover{border-color:var(--cyan);color:var(--text)}

/* ---- grounded "Ask the research programme" (user-initiated; tokens auto-adapt to light mode) ---- */
.ask{border:1px solid var(--border);clip-path:var(--clip);background:var(--surface);padding:1.4rem 1.5rem;margin:1.6rem 0}
.ask__eyebrow{font-family:var(--mono);font-size:.66rem;letter-spacing:2px;text-transform:uppercase;color:var(--cyan)}
.ask__h{font-family:var(--disp);font-size:1.2rem;margin:.3rem 0 .2rem;color:var(--text)}
.ask__sub{font-family:var(--serif);color:var(--mid);font-size:.98rem;max-width:72ch;margin:0 0 .9rem}
.ask__form{display:flex;gap:.6rem;flex-wrap:wrap}
.ask__input{flex:1;min-width:220px;font-family:var(--sans);font-size:.92rem;color:var(--text);
  background:var(--surface2);border:1px solid var(--border);border-radius:9px;padding:.6rem .8rem}
.ask__btn{flex:none}
.ask__out{margin-top:1rem}
.ask__note{font-family:var(--mono);font-size:.8rem;color:var(--dim);line-height:1.5;max-width:74ch}
.ask__list{list-style:none;margin:.4rem 0 0;padding:0;display:flex;flex-direction:column;gap:.7rem}
.ask__r{border-left:2px solid var(--hot);padding:.1rem 0 .1rem .9rem}
.ask__rt{font-family:var(--serif);font-weight:600;font-size:1rem;color:var(--text)}
.ask__rt a{color:inherit}.ask__rt a:hover{color:var(--cyan)}
.ask__rs{font-family:var(--serif);font-size:.92rem;line-height:1.5;color:var(--mid);margin:.2rem 0 0}