/* research.kenzy.ai — light "whitepaper" styles.
   Kenzy identity carried by a dark header bar + logo + cyan/gold accents;
   body is a clean, editorial light surface tuned for long-form + data figures. */

:root{
  --bg:#f6f7f8; --paper:#ffffff; --band:#fbfcfd;
  --ink:#15181b; --ink-2:#3d454b; --ink-3:#5f676d; --ink-4:#89909680;
  --ink-mut:#828a90;
  --line:rgba(18,22,26,.11); --line-2:rgba(18,22,26,.07);
  --cyan:#0e7fa4;              /* readable link/accent on light */
  --cyan-deep:#0a6285;
  --cyan-br:#5cc2e4;           /* chart fill */
  --gold:#a87a06;             /* readable gold accent on light */
  --gold-deep:#8a6404;
  --gold-br:#ffb500;          /* chart/rule fill */
  --slate:#9aa6ad;            /* muted chart bars */
  --hdr:#0a0d0f; --hdr-ink:#eef1f2; --hdr-ink-2:#aeb6bc;
  --grad-rule:linear-gradient(90deg,#5cc2e4,#8fd6ea 30%,#ffe08a 68%,#ffb500);
  --grad-ink:linear-gradient(90deg,#0e7fa4,#0a6285 40%,#9a7205 70%,#a87a06);
  --maxw:1120px; --prose:750px;
  --mono:ui-monospace,"SF Mono",Menlo,"JetBrains Mono",monospace;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI","Helvetica Neue",Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;line-height:1.62}
a{color:var(--cyan);text-decoration:none}
a:hover{color:var(--cyan-deep)}
::selection{background:rgba(255,181,0,.25)}
.mono{font-family:var(--mono)}
.grad{background:var(--grad-ink);-webkit-background-clip:text;background-clip:text;color:transparent}
img{max-width:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* header — the dark brand anchor */
header.site{position:sticky;top:0;z-index:50;background:var(--hdr);border-bottom:1px solid rgba(255,255,255,.08)}
.nav-in{max-width:var(--maxw);margin:0 auto;padding:13px 26px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;gap:10px;color:#fff}
.brand img{width:25px;height:25px;border-radius:7px;display:block}
.brand b{font-weight:600;font-size:16px;color:#fff}
.brand .tag{font-size:10.5px;letter-spacing:.22em;text-transform:uppercase;color:#7fd0e8;
  border:1px solid rgba(255,255,255,.16);border-radius:999px;padding:3px 9px;margin-left:2px}
nav.links{display:flex;align-items:center;gap:24px;font-size:14px;flex-wrap:wrap}
nav.links a{color:var(--hdr-ink-2)}
nav.links a:hover{color:#ffcf5e}
nav.links a.ext{color:#fff;background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.14);padding:6px 13px;border-radius:999px}
@media (max-width:720px){nav.links a.hide-sm{display:none}}

main{position:relative;z-index:1}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 26px}
.kicker{font-size:11.5px;letter-spacing:.24em;text-transform:uppercase;color:var(--cyan);font-weight:600}

/* hub / landing */
.hub-hero{max-width:820px;margin:0 auto;padding:clamp(52px,8vw,92px) 26px clamp(16px,3vw,30px)}
.hub-hero h1{font-size:clamp(34px,6vw,60px);font-weight:650;line-height:1.06;letter-spacing:-.025em;margin:16px 0 20px;max-width:20ch}
.hub-hero p{max-width:640px;margin:0;font-size:clamp(16px,1.7vw,19px);line-height:1.6;color:var(--ink-2)}
.paper-list{max-width:900px;margin:0 auto;padding:clamp(22px,4vw,44px) 26px clamp(60px,9vw,100px);display:grid;gap:18px}
.paper{display:block;background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:26px 30px;transition:border-color .18s,box-shadow .18s;box-shadow:0 1px 2px rgba(18,22,26,.03)}
.paper:hover{border-color:rgba(14,127,164,.4);box-shadow:0 6px 22px -10px rgba(18,22,26,.18)}
.paper .top{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:13px}
.paper .num{font-family:var(--mono);font-size:11.5px;color:var(--gold);letter-spacing:.06em}
.paper .date{font-family:var(--mono);font-size:11.5px;color:var(--ink-mut);margin-left:auto;white-space:nowrap}
.paper .chips{display:flex;gap:6px;flex-wrap:wrap}
.chip{font-size:11px;letter-spacing:.02em;color:var(--ink-3);border:1px solid var(--line);border-radius:5px;padding:2px 8px;background:var(--band)}
.chip.live{color:var(--cyan-deep);border-color:rgba(14,127,164,.3);background:rgba(14,127,164,.06)}
.paper h2{font-size:clamp(21px,2.8vw,27px);font-weight:650;letter-spacing:-.02em;line-height:1.18;margin:0 0 11px;color:var(--ink)}
.paper p{margin:0;font-size:15px;line-height:1.62;color:var(--ink-3);max-width:66ch}
.paper .more{display:inline-flex;align-items:center;gap:7px;margin-top:15px;font-size:14px;color:var(--cyan);font-weight:500}
.paper:hover .more{color:var(--cyan-deep)}

/* article */
article{padding-bottom:60px}
.art-head{max-width:var(--prose);margin:0 auto;padding:clamp(36px,6vw,68px) 26px clamp(14px,3vw,24px)}
.art-head .back{font-size:13px;color:var(--ink-mut)}
.art-head h1{font-size:clamp(28px,4.6vw,46px);font-weight:680;line-height:1.08;letter-spacing:-.028em;margin:16px 0 20px}
.art-head .dek{font-size:clamp(16.5px,1.9vw,20px);line-height:1.52;color:var(--ink-2);font-weight:400;margin:0}
.art-meta{display:flex;flex-wrap:wrap;gap:7px 16px;margin-top:22px;padding-top:18px;border-top:1px solid var(--line-2);font-size:12.5px;color:var(--ink-mut)}
.art-meta b{color:var(--ink-2);font-weight:600}

.prose{max-width:var(--prose);margin:0 auto;padding:0 26px}
.prose h2{font-size:clamp(22px,3.2vw,31px);font-weight:680;letter-spacing:-.02em;line-height:1.18;margin:54px 0 6px;padding-top:8px;scroll-margin-top:76px}
.prose h2 .h2n{font-family:var(--mono);font-size:.46em;color:var(--gold);margin-right:.7em;vertical-align:.18em;font-weight:600}
.prose h3{font-size:clamp(17px,2.1vw,21px);font-weight:650;letter-spacing:-.01em;margin:36px 0 4px;color:var(--ink)}
.prose p{font-size:16.5px;line-height:1.72;color:var(--ink-2);margin:15px 0}
.prose li{font-size:16.5px;line-height:1.62;color:var(--ink-2);margin:7px 0}
.prose strong{color:var(--ink);font-weight:650}
.prose em{color:var(--ink-2)}
.prose code{font-family:var(--mono);font-size:.85em;background:rgba(18,22,26,.05);border:1px solid var(--line-2);border-radius:5px;padding:1px 5px;color:#2a3f49}
.prose a{border-bottom:1px solid rgba(14,127,164,.3)}
.prose a:hover{border-color:var(--cyan-deep)}
.lead{font-size:18.5px !important;line-height:1.6 !important;color:var(--ink) !important}

/* tldr band */
.tldr{max-width:var(--prose);margin:6px auto 0;padding:0 26px}
.tldr .box{background:var(--band);border:1px solid var(--line);border-left:3px solid;border-image:var(--grad-rule) 1;border-radius:4px 12px 12px 4px;padding:20px 24px}
.tldr .box .lab{font-size:11px;letter-spacing:.22em;text-transform:uppercase;color:var(--gold);margin-bottom:9px;font-weight:600}
.tldr .box p{margin:8px 0;font-size:15px;line-height:1.62;color:var(--ink-2)}
.tldr .box p:first-of-type{margin-top:0}
.tldr .box strong{color:var(--ink)}

/* figures + charts — always aligned to the prose column (no breakout, so wide
   screens stay aligned and every size behaves the same) */
figure{margin:32px 0;max-width:100%}
figure.wide{width:100%}
.chart{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:22px 16px 14px;box-shadow:0 1px 2px rgba(18,22,26,.03);overflow-x:auto;-webkit-overflow-scrolling:touch}
/* charts fit the column on tablet/desktop; on narrow phones they keep a readable
   minimum width and scroll horizontally rather than shrinking labels illegibly */
.chart svg{display:block;width:100%;height:auto;min-width:480px}
figcaption{margin-top:12px;font-size:13.5px;line-height:1.55;color:var(--ink-mut);max-width:var(--prose)}
figcaption b{color:var(--ink-3);font-weight:600}
.chart-title{font-size:15px;font-weight:650;color:var(--ink);margin:0 0 3px}
.chart-sub{font-size:12.5px;color:var(--ink-mut);margin:0 0 16px;line-height:1.45}
/* svg chart primitives (light) */
.ax{stroke:rgba(18,22,26,.18);stroke-width:1}
.grid{stroke:rgba(18,22,26,.08);stroke-width:1}
/* larger type inside the SVGs so labels stay legible when a chart scales down */
.tick{fill:var(--ink-mut);font-family:var(--mono);font-size:13px}
.blab{fill:var(--ink-2);font-family:var(--sans);font-size:14px}
.bval{fill:var(--ink);font-family:var(--mono);font-size:13.5px;font-weight:600}
.legend{fill:var(--ink-3);font-family:var(--sans);font-size:13.5px}

/* data tables */
.tbl-wrap{overflow-x:auto;margin:24px 0;border:1px solid var(--line);border-radius:12px;background:var(--paper)}
table.data{width:100%;border-collapse:collapse;font-size:14px;min-width:520px}
table.data caption{caption-side:top;text-align:left;padding:14px 18px 2px;font-size:12.5px;color:var(--ink-mut)}
table.data th,table.data td{padding:10px 16px;text-align:right;border-bottom:1px solid var(--line-2)}
table.data th:first-child,table.data td:first-child{text-align:left}
table.data thead th{color:var(--cyan-deep);font-weight:650;font-size:12px;letter-spacing:.02em;border-bottom:1px solid var(--line);background:var(--band)}
table.data tbody tr:last-child td{border-bottom:none}
table.data tbody tr:hover{background:rgba(18,22,26,.02)}
table.data .win{color:var(--gold-deep);font-weight:650}
table.data .em{color:var(--ink);font-weight:650}
table.data tr.total td{border-top:1px solid var(--line);font-weight:650;color:var(--ink)}

/* callouts */
.callout{border-radius:10px;padding:17px 21px;margin:24px 0;border:1px solid var(--line);background:var(--paper);font-size:15px;line-height:1.6;color:var(--ink-2)}
.callout .lab{font-size:10.5px;letter-spacing:.18em;text-transform:uppercase;margin-bottom:7px;font-weight:700}
.callout.key{background:linear-gradient(180deg,rgba(255,181,0,.09),rgba(255,181,0,.02));border-color:rgba(168,122,6,.3)}
.callout.key .lab{color:var(--gold)}
.callout.trap{background:linear-gradient(180deg,rgba(199,74,74,.07),transparent);border-color:rgba(199,74,74,.28)}
.callout.trap .lab{color:#b4453f}
.callout.note{background:linear-gradient(180deg,rgba(14,127,164,.06),transparent);border-color:rgba(14,127,164,.24)}
.callout.note .lab{color:var(--cyan-deep)}
.callout strong{color:var(--ink)}

blockquote.pull{margin:36px 0;padding:2px 0 2px 22px;border-left:3px solid;border-image:var(--grad-rule) 1;
  font-size:clamp(19px,2.5vw,25px);font-weight:650;letter-spacing:-.018em;line-height:1.3;color:var(--ink)}

/* stat strip */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin:28px 0}
.stat{background:var(--paper);border:1px solid var(--line);border-radius:11px;padding:16px 18px}
.stat .n{font-size:clamp(24px,3.2vw,31px);font-weight:700;letter-spacing:-.02em;line-height:1;color:var(--ink)}
.stat .n.grad{background:var(--grad-ink);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat .l{font-size:12.5px;color:var(--ink-mut);margin-top:8px;line-height:1.42}

/* code block */
pre.code{background:var(--band);border:1px solid var(--line);border-radius:10px;padding:15px 18px;overflow-x:auto;
  font-family:var(--mono);font-size:12.5px;line-height:1.65;color:#2a3238;margin:22px 0}
pre.code .c{color:#8a9298}
pre.code .k{color:var(--gold-deep)}

/* toc */
.toc{background:var(--band);border:1px solid var(--line);border-radius:12px;padding:18px 22px;margin:32px auto 4px;max-width:calc(var(--prose) - 52px)}
.toc .lab{font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--ink-mut);margin-bottom:11px;font-weight:600}
.toc ol{margin:0;padding:0;list-style:none;counter-reset:s;columns:2;column-gap:34px}
.toc li{counter-increment:s;font-size:14.5px;margin:6px 0;break-inside:avoid}
.toc li::before{content:counter(s,decimal-leading-zero);font-family:var(--mono);font-size:11px;color:var(--gold);margin-right:10px}
.toc a{color:var(--ink-2);border:none}
.toc a:hover{color:var(--cyan-deep)}
@media (max-width:620px){.toc ol{columns:1}}

/* footer */
footer.site{background:var(--hdr);color:var(--hdr-ink-2);margin-top:64px}
.foot-in{max-width:var(--maxw);margin:0 auto;padding:40px 26px 46px;display:flex;flex-wrap:wrap;gap:24px;justify-content:space-between;align-items:flex-start}
.foot-in .brand b{color:#fff}
.foot-col{font-size:14px;color:var(--hdr-ink-2);line-height:1.7}
.foot-col a{color:var(--hdr-ink-2)}
.foot-col a:hover{color:#ffcf5e}
.foot-col .h{font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:#7a8288;margin-bottom:10px}
.disclaim{max-width:var(--maxw);margin:0 auto;padding:0 26px 40px;font-size:12.5px;color:#6a7278;line-height:1.6;background:var(--hdr)}

hr.sep{border:none;border-top:1px solid var(--line);margin:48px auto;max-width:calc(var(--prose) - 52px)}
.footnotes{max-width:var(--prose);margin:28px auto 0;padding:0 26px;font-size:13.5px;color:var(--ink-mut);line-height:1.6}
.footnotes a{color:var(--cyan)}

/* ---- scholarly front / back matter ---- */

/* provenance block (authors, version, status) under the title */
.provenance{max-width:var(--prose);margin:20px auto 0;padding:0 26px}
.provenance dl{display:grid;grid-template-columns:auto 1fr;gap:7px 20px;margin:0;
  padding:16px 20px;background:var(--band);border:1px solid var(--line);border-radius:10px;font-size:13px}
.provenance dt{color:var(--gold-deep);font-weight:650;letter-spacing:.03em;text-transform:uppercase;font-size:10.5px;padding-top:2px}
.provenance dd{margin:0;color:var(--ink-2);line-height:1.5}
.provenance dd a{color:var(--cyan)}
@media (max-width:560px){.provenance dl{grid-template-columns:1fr;gap:2px 0}.provenance dt{margin-top:9px}.provenance dt:first-child{margin-top:0}}

/* formal abstract */
.abstract{max-width:var(--prose);margin:26px auto 0;padding:0 26px}
.abstract .box{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:22px 26px;box-shadow:0 1px 2px rgba(18,22,26,.03)}
.abstract .lab{font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--cyan-deep);font-weight:700;margin-bottom:11px}
.abstract p{font-size:15.5px;line-height:1.68;color:var(--ink-2);margin:12px 0}
.abstract p:first-of-type{margin-top:0}
.abstract strong{color:var(--ink);font-weight:650}
.abstract .kw{margin:16px 0 0;padding-top:13px;border-top:1px solid var(--line-2);font-size:13px;color:var(--ink-mut);line-height:1.6}
.abstract .kw b{color:var(--ink-2);font-weight:600}

/* definition / glossary lists */
dl.gloss{margin:20px 0}
dl.gloss dt{font-weight:650;color:var(--ink);font-size:16px;margin-top:18px}
dl.gloss dt .t{font-family:var(--mono);font-size:.8em;font-weight:600;color:var(--cyan-deep);margin-left:8px;letter-spacing:0}
dl.gloss dd{margin:4px 0 0;font-size:15.5px;line-height:1.64;color:var(--ink-2)}
dl.gloss dd code{font-family:var(--mono);font-size:.85em;background:rgba(18,22,26,.05);border:1px solid var(--line-2);border-radius:5px;padding:1px 5px;color:#2a3f49}

/* appendix + back-matter section separation */
.prose h2.appx{margin-top:62px;padding-top:28px;border-top:1px solid var(--line)}
.prose h2 .h2n.az{color:var(--cyan-deep)}

/* references */
ol.refs{margin:16px 0;padding-left:0;list-style:none;counter-reset:r}
ol.refs li{counter-increment:r;position:relative;padding-left:36px;margin:12px 0;font-size:14.5px;line-height:1.56;color:var(--ink-2)}
ol.refs li::before{content:"["counter(r)"]";position:absolute;left:0;top:0;font-family:var(--mono);font-size:12px;color:var(--gold);font-weight:600}
ol.refs a{word-break:break-word;color:var(--cyan)}
ol.refs .src{color:var(--ink-mut)}

/* inline figure/table number label inside captions */
.tnum{color:var(--cyan-deep);font-weight:650}

/* measured vs calculated coding in the consolidated reference grids */
table.data td.calc{color:var(--cyan-deep)}
table.data td.calc sup{font-weight:400;font-size:.72em;vertical-align:.35em}
.grid-legend{font-size:12.5px;color:var(--ink-mut);margin:10px 2px 22px;line-height:1.7}
.grid-legend b{color:var(--ink-2);font-weight:600}
.grid-legend .sw-c{color:var(--cyan-deep);font-weight:650}