/* nav.css — unified header, mega menu, breadcrumbs, footer (2026-09-20) */
:root{--paper:#f7f6f2;--card:#fdfcf9;--ink:#141412;--muted:#605f58;--rule:#d5d2c8;--ox:#8a2318;
--mono:'IBM Plex Mono',ui-monospace,monospace;--serif:'Newsreader',Georgia,serif}
.skip{position:absolute;left:-9999px;top:0;z-index:100;background:var(--ink);color:var(--paper);
padding:10px 16px;font-family:var(--mono);font-size:14px;text-decoration:none}
.skip:focus{left:8px;top:8px}
a:focus-visible,button:focus-visible,label:focus-visible,summary:focus-visible{outline:2px solid var(--ox);outline-offset:2px}
header.site{border-bottom:1px solid var(--ink);position:sticky;top:0;background:var(--paper);z-index:40}
header.site .wrap{display:flex;justify-content:space-between;align-items:center;gap:12px;
padding-top:14px;padding-bottom:14px;max-width:1160px;margin:0 auto;padding-left:24px;padding-right:24px}
header.site .logo{font-family:var(--mono);font-size:15px;font-weight:600;text-decoration:none;letter-spacing:.02em;
color:var(--ink);white-space:nowrap;display:inline-flex;align-items:center;min-height:44px;padding:2px 0}
header.site nav{display:flex;align-items:center;flex-wrap:nowrap;justify-content:flex-end;gap:2px}
header.site nav a{font-family:var(--mono);font-size:13px;text-decoration:none;color:var(--ink);padding:8px 10px;display:inline-block}
header.site nav a:hover{color:var(--ox)}
header.site nav a[aria-current="page"]{color:var(--ox);text-decoration:underline;text-underline-offset:4px}
.navitem{position:relative;display:inline-flex;align-items:center}
.submenu{position:absolute;top:100%;left:0;background:var(--paper);border:1px solid var(--ink);display:none;z-index:50}
.submenu.mega{width:min(720px,88vw);padding:18px 20px 12px;grid-template-columns:repeat(3,1fr);gap:4px 26px}
.hasmenu:hover>.submenu,.hasmenu:focus-within>.submenu{display:grid}
.mm-col{min-width:0}
.mm-h{display:block;font-family:var(--mono);font-size:10.5px;letter-spacing:.09em;text-transform:uppercase;
color:var(--muted);border-bottom:1px solid var(--rule);padding-bottom:6px;margin-bottom:6px}
header.site .submenu a{display:block;width:auto;padding:7px 4px;white-space:normal;font-size:13.5px;margin:0;border-radius:0}
header.site .submenu a:hover{color:var(--ox);background:var(--card)}
.mm-all{grid-column:1/-1;border-top:1px solid var(--rule);margin-top:8px;padding-top:6px}
header.site .mm-all a{display:block;font-size:12.5px;color:var(--muted)}
header.site nav a.li{display:inline-flex;align-items:center;color:#0a66c2;padding:8px}
header.site nav a.li:hover{color:#004182}
.navcta{display:inline-flex;flex-direction:column;align-items:stretch;margin-left:10px;gap:3px}
header.site nav a.cta{color:var(--paper);background:var(--ink);padding:9px 16px;border:1px solid var(--ink);text-align:center}
header.site nav a.cta:hover{background:var(--ox);border-color:var(--ox);color:var(--paper)}
header.site nav a.write{font-size:11.5px;color:var(--muted);text-align:center;padding:0 2px 2px;text-decoration:underline;text-underline-offset:2px}
header.site nav a.write:hover{color:var(--ox)}
.nav-t{position:absolute;opacity:0;pointer-events:none;width:1px;height:1px}
.burger{display:none}
@media(max-width:980px){
header.site .wrap{flex-wrap:wrap}
.burger{display:flex;flex-direction:column;justify-content:center;gap:5px;width:46px;height:46px;cursor:pointer;padding:11px 8px;border:1px solid var(--ink);box-sizing:border-box}
.burger span{display:block;height:2px;background:var(--ink)}
header.site nav{display:none;flex-basis:100%;flex-direction:column;align-items:stretch;margin-top:12px;gap:0}
.nav-t:checked~nav{display:flex}
header.site nav>a,.navitem{margin-left:0;border-top:1px solid var(--rule)}
header.site nav a{font-size:16px;padding:14px 2px;min-height:44px}
.navitem{position:static;display:block}
.hasmenu>a{display:block}
.submenu,.submenu.mega{position:static;display:grid;grid-template-columns:1fr;border:none;width:auto;
padding:0 0 10px 14px;background:none}
.mm-col{margin-bottom:6px}
header.site .submenu a{display:block;padding:11px 2px;font-size:15px;color:var(--ink);min-height:44px}
.mm-all{margin-top:4px}
header.site nav a.li{padding:14px 2px;justify-content:flex-start}
.navcta{margin-left:0;margin-top:10px;border-top:1px solid var(--rule);padding-top:12px}
header.site nav a.cta{padding:15px;font-size:15px}
header.site nav a.write{padding:10px 2px;font-size:14px;min-height:40px}
}
/* legacy "Keep reading" blocks: lb.css never styled .related */
.related{max-width:760px;margin:44px auto 0;padding:26px 24px 8px;border-top:1px solid var(--ink)}
.related .k,.related p.k{font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;
color:var(--muted);margin:0 0 14px}
.related ul{list-style:none;margin:0;padding:0}
.related li{border:1px solid var(--rule);background:var(--card);padding:13px 16px;margin:0 0 10px;
font-size:15.5px;line-height:1.5;color:var(--muted)}
.related li a{color:var(--ink);text-decoration:underline;text-underline-offset:3px;text-decoration-color:var(--rule)}
.related li a:hover{color:var(--ox);text-decoration-color:var(--ox)}
@media(max-width:820px){.related{margin-top:32px;padding:22px 24px 4px}}
/* legacy <aside class="cocoon"> blocks: never styled anywhere */
aside.cocoon{max-width:760px;margin:44px auto 0;padding:26px 24px 10px;border-top:1px solid var(--ink)}
aside.cocoon h2{font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;
color:var(--muted);font-weight:400;margin:0 0 14px;line-height:1.3}
aside.cocoon ul{list-style:none;margin:0;padding:0}
aside.cocoon li{border:1px solid var(--rule);background:var(--card);padding:13px 16px;margin:0 0 10px;
font-size:15.5px;line-height:1.5;color:var(--muted)}
aside.cocoon li a{color:var(--ink);text-decoration:underline;text-underline-offset:3px;text-decoration-color:var(--rule)}
aside.cocoon li a:hover{color:var(--ox);text-decoration-color:var(--ox)}
@media(max-width:820px){aside.cocoon{margin-top:32px;padding:22px 24px 4px}}
/* case-study chart */
.chart svg{width:100%;height:auto;display:block}
/* breadcrumbs */
.crumbs{border-bottom:1px solid var(--rule);background:var(--paper)}
.crumbs .wrap{max-width:1160px;margin:0 auto;padding:10px 24px;font-family:var(--mono);font-size:12px;color:var(--muted);
overflow-x:auto;white-space:nowrap;-webkit-overflow-scrolling:touch}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--ox)}
.crumbs span[aria-current]{color:var(--ink)}
/* footer */
footer.site{background:var(--ink);color:#a7a49b;padding:44px 0 26px;font-family:var(--mono);font-size:13px;border-bottom:none}
footer.site .wrap{max-width:1160px;margin:0 auto;padding:0 24px}
footer.site .fgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:26px 30px}
footer.site .fcol h2{font-family:var(--mono);font-size:11px;letter-spacing:.09em;text-transform:uppercase;
color:#f7f6f2;font-weight:500;margin:0 0 10px;padding-bottom:8px;border-bottom:1px solid #3a3933;line-height:1.3}
footer.site a{display:block;color:#c9c6bd;text-decoration:none;padding:5px 0;font-size:12.5px;margin:0}
footer.site a:hover{color:#fff;text-decoration:underline}
footer.site .fnote{color:#8a8981;font-size:12px;line-height:1.7;margin-top:12px}
footer.site .fbottom{margin-top:30px;padding-top:18px;border-top:1px solid #3a3933;color:#8a8981;font-size:12px;line-height:1.6}
@media(max-width:860px){footer.site .fgrid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){footer.site .fgrid{grid-template-columns:1fr}footer.site a{padding:9px 0;font-size:14px}}
/* shared safety nets */
img,svg,video,table{max-width:100%}
img{height:auto}
.tablewrap,.tbl{overflow-x:auto;-webkit-overflow-scrolling:touch}
@media(max-width:700px){table{font-size:14px}}
html{-webkit-text-size-adjust:100%}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}.reveal{opacity:1!important;transform:none!important}}