/* ANTB Knowledge article, premium editorial. Cover photo with serif headline, refined serif reading column,
   wide figures, restrained topic accent. Source Serif 4 display + text, Geist for UI. */
.ka{--paper:#faf8f3;--card:#fff;--ink:#121a22;--text:#2a333b;--muted:#646c72;--line:#e5dfd3;--gold:#f2b84b;
  --ac:#b5602a;--tint:#f4e5cf;
  --serif:"Source Serif 4",Georgia,"Times New Roman",serif;--body:Geist,system-ui,-apple-system,"Segoe UI",sans-serif;
  background:var(--paper);color:var(--ink);font-family:var(--body);padding-bottom:96px}
.ka.t-culture{--ac:#3b6aa8;--tint:#e0e9f5}
.ka.t-how{--ac:#3a7f57;--tint:#e1ece0}
.ka *{box-sizing:border-box}
.ka a{color:inherit}
.ka h1,.ka h2,.ka h3,.ka p,.ka figure,.ka blockquote{margin:0}
.ka a:focus-visible,.ka button:focus-visible,.ka summary:focus-visible{outline:3px solid var(--gold);outline-offset:3px;border-radius:4px}
.ka-shell{width:min(1240px,calc(100% - 32px));margin-left:auto;margin-right:auto}
.ka-label{font-family:var(--body);font-size:12px;font-weight:700;letter-spacing:.12em;text-transform:uppercase}

.ka-progress{position:fixed;left:0;top:0;height:3px;width:100%;transform-origin:0 50%;transform:scaleX(0);background:var(--ac);z-index:1100}

/* Cover */
.ka-cover{position:relative;width:min(1440px,100%);margin:0 auto;min-height:clamp(500px,70vh,700px);display:flex;align-items:flex-end;color:#fff;overflow:hidden;background:#1c2329}
.ka-cover img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;cursor:zoom-in}
.ka-cover::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,14,18,.15) 0%,rgba(10,14,18,0) 30%,rgba(10,14,18,.55) 62%,rgba(10,14,18,.9) 100%);pointer-events:none}
.ka-cover-in{position:relative;z-index:1;width:min(1240px,calc(100% - 32px));margin:0 auto;padding-block:48px 52px}
.ka-crumbs{display:flex;gap:8px;flex-wrap:wrap;font-size:13px;opacity:.85;margin-bottom:22px}
.ka-crumbs a{text-decoration:none}.ka-crumbs a:hover{text-decoration:underline}
.ka-crumbs span{opacity:.6}
.ka-kick{display:flex;align-items:center;gap:12px;color:var(--gold)}
.ka-kick::before{content:"";width:28px;height:2px;background:currentColor}
.ka-cover h1{font-family:var(--serif);font-weight:600;font-size:clamp(40px,6.4vw,84px);line-height:1.02;letter-spacing:-.02em;max-width:15ch;margin-top:16px;text-wrap:balance;font-variation-settings:"opsz" 60}
.ka .ka-deck{font-family:var(--serif);font-style:italic;font-size:clamp(19px,2.1vw,24px);line-height:1.45;max-width:44ch;margin-top:18px;color:rgba(255,255,255,.96)}
.ka-credit{position:absolute;right:16px;bottom:12px;z-index:1;font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:rgba(255,255,255,.7)}

/* Byline bar */
.ka-by{display:flex;align-items:center;gap:14px 22px;flex-wrap:wrap;padding-block:20px;border-bottom:1px solid var(--line);font-size:14px;color:var(--muted)}
.ka-mark{width:36px;height:36px;border-radius:50%;background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:center;font:700 12px var(--body);letter-spacing:.04em;flex:none}
.ka-who{display:flex;align-items:center;gap:10px;color:var(--ink)}
.ka-who b{font-weight:600}
.ka-who small{display:block;color:var(--muted);font-size:12.5px}
.ka-by .dot{width:3px;height:3px;border-radius:50%;background:currentColor;opacity:.5}
.ka-by a{text-decoration:underline;text-decoration-color:var(--line);text-underline-offset:3px}
.ka-share{margin-left:auto;display:flex;gap:8px}
.ka-share button{height:36px;padding:0 14px;border-radius:999px;border:1px solid var(--line);background:var(--card);font:600 13px var(--body);color:var(--ink);cursor:pointer}
.ka-share button:hover{border-color:var(--ink)}

/* Layout */
.ka-grid{display:grid;grid-template-columns:200px minmax(0,690px);gap:64px;margin-top:56px}
.ka-toc{position:sticky;top:96px;font-size:13.5px}
.ka-toc .ka-label{color:var(--muted);margin-bottom:14px;display:block}
.ka-toc ol{list-style:none;margin:0;padding:0;counter-reset:c}
.ka-toc li{counter-increment:c}
.ka-toc a{display:grid;grid-template-columns:22px 1fr;padding:7px 0;text-decoration:none;color:var(--muted);line-height:1.35;transition:color .2s}
.ka-toc a::before{content:counter(c,decimal-leading-zero);font-size:11px;font-weight:600;padding-top:2px;opacity:.6;font-variant-numeric:tabular-nums}
.ka-toc li:last-child a::before{content:"·"}
.ka-toc a:hover{color:var(--ink)}
.ka-toc a.on{color:var(--ink);font-weight:600}
.ka-toc a.on::before{color:var(--ac);opacity:1}

/* At a glance */
.ka-glance{border-top:2px solid var(--ink);border-bottom:1px solid var(--line);padding:22px 0 26px}
.ka-glance .ka-label{color:var(--ac)}
.ka-glance p+p{font-family:var(--serif);font-size:22px;line-height:1.5;color:var(--ink);margin-top:10px}
.ka-facts{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;margin:28px 0 48px;border:1px solid var(--line);border-radius:16px;background:var(--card);overflow:hidden}
.ka-facts div{padding:18px 20px}
.ka-facts div+div{border-left:1px solid var(--line)}
.ka-facts b{display:block;font-family:var(--serif);font-weight:600;font-size:30px;line-height:1.05;color:var(--ink);letter-spacing:-.01em}
.ka-facts span{display:block;margin-top:8px;font-size:14px;line-height:1.45;color:var(--muted)}

/* Reading column */
.ka-body{margin-top:42px;font-family:var(--serif);font-size:20px;line-height:1.75;color:var(--text);font-variation-settings:"opsz" 16}
.ka-body section{scroll-margin-top:96px}
.ka-body section+section,.ka-body figure+section,.ka-body blockquote+section,.ka-body aside+section{margin-top:52px}
.ka-body h2{font-family:var(--serif);font-weight:600;font-size:clamp(27px,2.8vw,34px);line-height:1.15;letter-spacing:-.015em;color:var(--ink);margin-bottom:18px;text-wrap:balance;font-variation-settings:"opsz" 40}
.ka-body h2::before{content:"";display:block;width:36px;height:2px;background:var(--ac);margin-bottom:16px}
.ka-body p+p{margin-top:1.1em}
.ka-body section:first-of-type p:first-of-type::first-letter{float:left;font-weight:600;font-size:4.6em;line-height:.8;padding:.06em .08em 0 0;color:var(--ink)}
.ka-body a{text-decoration:underline;text-decoration-color:var(--ac);text-decoration-thickness:1px;text-underline-offset:3px}
.ka-body a:hover{text-decoration-thickness:2px}
.ka-body sup{line-height:0;font-family:var(--body);font-size:11px;font-weight:700;margin-left:2px}
.ka-body sup a{text-decoration:none;color:var(--ac);position:relative;padding:0 2px}
.ka-body sup a:hover::after,.ka-body sup a:focus-visible::after{content:attr(data-src);position:absolute;left:50%;bottom:160%;transform:translateX(-50%);white-space:nowrap;background:var(--ink);color:#fff;font-weight:500;font-size:12.5px;line-height:1;padding:8px 10px;border-radius:8px;z-index:5}

/* Wide figures */
.ka .ka-fig{margin:36px -120px 0 0}
.ka-fig img{width:100%;border-radius:6px;display:block;cursor:zoom-in;background:var(--line)}
.ka-cap{display:flex;gap:10px;margin-top:12px;font-family:var(--body);font-size:13.5px;line-height:1.5;color:var(--muted);max-width:640px}
.ka-cap b{color:var(--ink);font-weight:600}
.ka-tag{flex:none;font-size:10.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;border:1px solid var(--line);border-radius:4px;padding:2px 6px;margin-top:2px;height:fit-content}

/* Diagram */
.ka .ka-diagram{margin:36px 0 0;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:22px 22px 16px}
.ka-diagram .ka-label{color:var(--muted)}
.ka-diagram svg{display:block;width:100%;height:auto;margin-top:10px}
.ka-diagram figcaption{font-family:var(--body);font-size:13.5px;color:var(--muted);margin-top:8px}

/* Pull quote */
.ka .ka-pull{margin:42px 0 0;padding:30px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);font-family:var(--serif);font-style:italic;font-weight:500;font-size:clamp(26px,3vw,34px);line-height:1.3;color:var(--ink);text-align:center;text-wrap:balance}
.ka-pull::before{content:"“";display:block;font-size:64px;line-height:.6;color:var(--ac);font-style:normal;margin-bottom:6px}

/* Inline related link */
.ka-also{margin:52px 0 0;display:flex;align-items:center;gap:16px;padding:14px;border-radius:14px;background:var(--tint);text-decoration:none!important;font-family:var(--body)}
.ka-also img{width:84px;height:64px;object-fit:cover;border-radius:10px;flex:none}
.ka-also small{display:block;color:var(--ac);font-size:11.5px;font-weight:700;letter-spacing:.1em;text-transform:uppercase}
.ka-also strong{display:block;font-family:var(--serif);font-weight:600;font-size:19px;line-height:1.25;color:var(--ink);margin-top:2px}

/* After the story */
.ka-take{margin-top:64px;border-top:2px solid var(--ink);padding-top:22px}
.ka-take h2{font-family:var(--serif);font-weight:600;font-size:28px;letter-spacing:-.01em}
.ka-take ol{list-style:none;margin:18px 0 0;padding:0;counter-reset:t;display:grid;grid-template-columns:1fr 1fr;gap:20px 32px}
.ka-take li{counter-increment:t;display:grid;grid-template-columns:34px 1fr;font-size:16px;line-height:1.55;color:var(--text)}
.ka-take li::before{content:counter(t);font-family:var(--serif);font-size:26px;font-weight:600;line-height:1;color:var(--ac)}
.ka-sources{margin-top:56px}
.ka-sources h2{font-family:var(--serif);font-weight:600;font-size:28px;letter-spacing:-.01em}
.ka-sources>p{color:var(--muted);font-size:15px;margin-top:4px}
.ka-sources ol{margin:18px 0 0;padding:0;list-style:none;counter-reset:s}
.ka-sources li{counter-increment:s;border-top:1px solid var(--line);scroll-margin-top:110px}
.ka-sources li:target{background:var(--tint)}
.ka-sources li a{display:grid;grid-template-columns:30px 1fr 18px;gap:10px;align-items:baseline;padding:14px 4px;text-decoration:none;font-size:15.5px;line-height:1.4}
.ka-sources li a::before{content:counter(s);color:var(--ac);font-weight:700;font-size:13px}
.ka-sources li a::after{content:"↗";color:var(--muted)}
.ka-sources b{display:block;font-weight:600;color:var(--ink)}
.ka-sources small{color:var(--muted);font-size:13px}
.ka-note{margin-top:20px;font-size:13.5px;line-height:1.55;color:var(--muted)}

.ka-next{margin-top:96px;padding-top:28px;border-top:2px solid var(--ink)}
.ka-next-head{display:flex;justify-content:space-between;align-items:baseline;gap:16px;flex-wrap:wrap;margin-bottom:28px}
.ka-next-head h2{font-family:var(--serif);font-weight:600;font-size:clamp(30px,3.6vw,44px);letter-spacing:-.015em}
.ka-next-head a{font-weight:600;font-size:15px;text-decoration:none}
.ka-cards{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:28px}
.ka-card{position:relative;display:flex;flex-direction:column;gap:12px}
.ka-card img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:6px;display:block;transition:opacity .3s}
.ka-card:first-child img{aspect-ratio:16/11}
.ka-card:hover img{opacity:.88}
.ka-card small{color:var(--muted);font-size:12px;font-weight:700;letter-spacing:.1em;text-transform:uppercase}
.ka-card h3{font-family:var(--serif);font-weight:600;font-size:22px;line-height:1.2;letter-spacing:-.01em;text-wrap:balance}
.ka-card:first-child h3{font-size:28px}
.ka-card h3 a{text-decoration:none}
.ka-card h3 a::after{content:"";position:absolute;inset:0}
.ka-card:hover h3 a{text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:4px}

/* Contents dropdown (narrow screens) */
.ka-toc-m{display:none;margin-bottom:28px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.ka-toc-m summary{cursor:pointer;list-style:none;padding:14px 0;font-weight:600;font-size:15px;display:flex;justify-content:space-between}
.ka-toc-m summary::-webkit-details-marker{display:none}
.ka-toc-m summary::after{content:"+";color:var(--muted);font-size:18px;line-height:1}
.ka-toc-m[open] summary::after{content:"–"}
.ka-toc-m ol{margin:0;padding:0 0 16px 22px;font-size:15px;line-height:1.4;display:grid;gap:8px}
.ka-toc-m a{text-decoration:none}

/* Image viewer and copy status */
.ka-page{margin:0}
.ka-cover > .ka-image-link{position:absolute;inset:0}
.ka-cover > .ka-image-link:focus-visible{outline-offset:-7px;z-index:1}
.ka-cover-text{min-height:360px}
.ka .ka-cover-caption{margin:12px auto 0;max-width:1240px}
.ka-toc{max-height:calc(100dvh - 120px);overflow:auto}
.ka-sources{scroll-margin-top:96px}
.ka-sources > .ka-label{color:var(--ac);font-size:12px}
.ka-sources .ka-note{margin-top:20px}
.ka-fig img,.ka-card img{height:auto}
.ka-zoom{border:0;border-radius:12px;background:#131b22;color:#fff;padding:16px;max-width:calc(100vw - 24px);max-height:calc(100dvh - 24px)}
.ka-zoom::backdrop{background:rgba(8,12,16,.9)}
.ka-zoom form{display:flex;justify-content:flex-end;margin-bottom:10px}
.ka-zoom button{font:inherit;padding:8px 14px;border-radius:8px;border:0;cursor:pointer}
.ka-zoom img{display:block;max-width:min(1200px,calc(100vw - 56px));max-height:calc(100dvh - 105px);object-fit:contain}
.ka-toast:not(:empty){position:fixed;left:50%;bottom:28px;transform:translateX(-50%);background:var(--ink);color:#fff;font:600 14px var(--body);padding:10px 16px;border-radius:999px;z-index:1100;max-width:calc(100vw - 32px)}
@media (max-width:640px){
  .ka-cover-in{padding-block:32px}
  .ka-cover h1{font-size:clamp(36px,11vw,54px)}
  .ka-by{gap:12px 16px}
  .ka-body sup a:hover::after,.ka-body sup a:focus-visible::after{white-space:normal;max-width:130px;width:max-content}
}

@media (max-width:1180px){
  .ka-grid{grid-template-columns:minmax(0,690px);justify-content:center}
  .ka-rail{display:none}
  .ka-toc-m{display:block}
  .ka .ka-fig{margin-right:0}
}
@media (max-width:640px){
  .ka-cover{min-height:480px}
  .ka-body{font-size:18.5px}
  .ka-facts{grid-template-columns:1fr}
  .ka-facts div+div{border-left:0;border-top:1px solid var(--line)}
  .ka-take ol{grid-template-columns:1fr}
  .ka-cards{grid-template-columns:1fr}
  .ka-share{margin-left:0}
}
@media (prefers-reduced-motion:reduce){.ka *{transition:none!important}}

.ka-tool,.ka-number-break{margin-top:30px;border:1px solid var(--line);border-radius:14px;background:var(--tint);padding:20px}
.ka-tool h2{font:600 28px var(--serif);margin:4px 0 8px}
.ka-tool a{display:inline-block;margin-top:10px;font-weight:700}
.ka-number-break{display:flex;flex-wrap:wrap;gap:8px 16px;align-items:baseline;font-family:var(--body);font-size:15px}
.ka-number-break b{color:var(--ac);font:600 28px var(--serif)}