/* Production navigation v1. Existing brand, content and tool styles stay intact. */
.nv-header,.nv-utility,.nv-shortcuts,.nv-context,.nv-welcome,.nv-directory{font-family:var(--sans);color:var(--ink);box-sizing:border-box}
.nv-header *,.nv-welcome *,.nv-directory *{box-sizing:border-box}
.nv-header{position:relative;z-index:110;background:var(--surface);border-bottom:1px solid var(--line)}
.nv-bar{max-width:1384px;margin:auto;min-height:88px;padding:16px var(--rd-gutter);display:flex;align-items:center;gap:32px}
.nv-logo{flex-shrink:0;display:flex;align-items:center;min-height:44px}
.nv-logo svg{width:190px;height:auto}
.nv-primary{display:flex;align-items:center;gap:4px;margin-left:auto}
.nv-header button,.nv-utility button,.nv-welcome button{font:inherit;cursor:pointer}
.nv-trigger,.nv-search,.nv-mobile-toggle{border:0;background:transparent;color:var(--ink);padding:12px 13px;min-height:44px;font-size:15px;font-weight:600;text-decoration:none;border-radius:4px;white-space:nowrap}
.nv-trigger:after{content:"";display:inline-block;width:6px;height:6px;border-right:1px solid;border-bottom:1px solid;transform:translateY(-3px) rotate(45deg);margin-left:9px}
.nv-trigger[aria-expanded=true],.nv-trigger:hover,.nv-search:hover{background:var(--accent-soft);color:var(--accent)}
.nv-search{border:1px solid var(--line-strong);margin-left:8px}
.nv-mobile-toggle{display:none}
.nv-panel{position:absolute;top:100%;left:0;right:0;background:var(--surface);box-shadow:0 18px 25px #203e3414;border-bottom:1px solid var(--line);max-height:calc(100dvh - 90px);overflow:auto}
.nv-panel[hidden],.nv-mobile[hidden]{display:none}
.nv-panel-inner{max-width:1280px;margin:auto;padding:32px var(--rd-gutter);display:grid;grid-template-columns:240px 1fr;gap:40px}
.nv-panel-lead h2{font:400 28px/1.2 var(--serif);margin:0 0 12px}
.nv-panel-lead p{font-size:15px;line-height:1.6;color:var(--ink-2);margin:0 0 20px}
.nv-panel-lead>a{font-size:14px;color:var(--accent);text-underline-offset:4px}
.nv-groups{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
.nv-group h3,.nv-kicker{font:600 11px/1.5 var(--sans);letter-spacing:.12em;text-transform:uppercase;color:var(--ink-3);margin:0 0 12px}
.nv-link{display:block;padding:10px 12px;margin-left:-12px;text-decoration:none;border-radius:4px;color:var(--ink);min-height:44px}
.nv-link:hover{background:var(--bg-alt)}
.nv-link strong{display:block;font-size:15px;font-weight:600;line-height:1.5}
.nv-link small{display:block;font-size:13px;line-height:1.5;color:var(--ink-2);margin-top:3px}
.nv-utility{max-width:1280px;padding:8px var(--rd-gutter);margin:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:12px}
.nv-utility-left,.nv-utility-right{display:flex;align-items:center;gap:16px}
.nv-utility a,.nv-utility button{font-size:12px;text-decoration:none;color:var(--ink-2);background:transparent;border:0;min-height:44px;display:inline-flex;align-items:center;padding:0}
.nv-utility .mode-toggle{position:static;margin:0;box-shadow:none}
.nv-utility .mode-toggle__btn{padding:5px 12px;min-height:32px;font-size:12px}
.nv-utility .mode-toggle__btn.active{background:var(--accent);color:var(--surface)}
.nv-shortcuts{display:none}
.nv-welcome{border:1px solid var(--line);border-radius:8px;padding:0;background:var(--surface);width:min(780px,calc(100% - 32px));max-height:calc(100dvh - 44px);overflow:auto;color:var(--ink);box-shadow:0 24px 90px #142b3240}
.nv-welcome::backdrop{background:#142b3266;backdrop-filter:blur(4px)}
.nv-welcome-head{padding:40px 44px 24px;position:relative}
.nv-welcome h2{font:400 clamp(26px,3.5vw,38px)/1.2 var(--serif);letter-spacing:-.025em;max-width:570px;margin:8px 0 12px}
.nv-welcome p{font-size:15px;line-height:1.6;color:var(--ink-2);margin:0}
.nv-close{position:absolute;right:14px;top:12px;border:0;background:none;color:var(--ink-2);font-size:13px!important;min-height:44px;padding:10px}
.nv-paths{padding:0 44px 18px}
.nv-path{display:grid;grid-template-columns:28px 1fr 24px;gap:16px;align-items:center;color:var(--ink);text-decoration:none;padding:19px 0;border-top:1px solid var(--line)}
.nv-path:hover{color:var(--accent);background:var(--bg-alt)}
.nv-path>span:first-child{font-size:12px;color:var(--ink-3)}
.nv-path strong{font-size:18px;font-weight:600;display:block}
.nv-path small{font-size:14px;line-height:1.5;color:var(--ink-2);display:block;margin-top:4px}
.nv-welcome-extra{display:flex;flex-wrap:wrap;gap:8px 24px;padding:18px 44px;background:var(--bg-alt);border-top:1px solid var(--line)}
.nv-welcome-extra a{font-size:14px;color:var(--accent);min-height:44px;display:flex;align-items:center;text-underline-offset:4px}
.nv-welcome-mode{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 16px;padding:14px 44px;background:var(--accent-soft,#DCEBE2);border-top:1px solid var(--line)}
.nv-welcome-mode span{font-size:13.5px;color:var(--ink-2);line-height:1.5}
.nv-welcome-mode button{background:var(--accent,#0F6B4F);color:#fff;border:0;border-radius:999px;padding:9px 18px;min-height:40px;font-size:13.5px;font-weight:600;cursor:pointer;white-space:nowrap}
.nv-welcome-mode button:hover{background:var(--accent-dark,#0B5540)}
.nv-welcome-bottom{padding:16px 44px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.nv-welcome-bottom button{background:none;border:0;color:var(--ink);padding:8px 0;min-height:44px;font-size:14px}
.nv-welcome-bottom small{color:var(--ink-3);font-size:12px}
.nv-context{padding:16px var(--rd-gutter);max-width:1280px;margin:auto;display:flex;align-items:center;gap:12px;flex-wrap:wrap;border-bottom:1px solid var(--line);font-size:13px}
.nv-context>a{color:var(--ink-2);padding:8px 12px;min-height:44px;display:inline-flex;align-items:center;text-decoration:none}
.nv-context>a:first-of-type{background:var(--accent-soft);color:var(--accent);border-radius:4px;font-weight:600}
.nv-directory{max-width:1200px;margin:0 auto;padding:56px var(--rd-gutter) 80px}
.nv-directory h1{font:400 clamp(36px,5vw,56px)/1.12 var(--serif);letter-spacing:-.03em;margin:10px 0 20px}
.nv-directory>p{max-width:650px;color:var(--ink-2);font-size:17px;line-height:1.7}
.nv-directory-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:36px 64px;margin-top:48px}
.nv-directory section{border-top:1px solid var(--line);padding-top:24px}
.nv-directory h2{font:400 27px/1.2 var(--serif);margin:0 0 12px}
.nv-directory section>p{font-size:14px;color:var(--ink-2);margin:0 0 24px}
.nv-directory .nv-group{margin:18px 0}
.nv-directory .nv-link{max-width:470px}
.nv-header :focus-visible,.nv-utility :focus-visible,.nv-welcome :focus-visible,.nv-directory :focus-visible{outline:2px solid var(--accent);outline-offset:4px}
@media(min-width:1001px){.nv-mobile{display:none!important}}
@media(max-width:1000px){
 .nv-bar{min-height:72px;padding:12px 20px;gap:12px}
 .nv-logo{margin-right:auto}.nv-logo svg.brand-lockup-a{width:155px!important}
 .nv-primary{display:none}.nv-mobile-toggle{display:block;padding:10px 6px}
 .nv-search{padding:10px;font-size:14px;margin:0;border:0}
 .nv-shortcuts{display:flex;border-bottom:1px solid var(--line);background:var(--surface);padding:4px 20px;gap:24px}
 .nv-shortcuts a{min-height:44px;display:flex;align-items:center;font-size:13px;font-weight:600;text-decoration:none;color:var(--accent)}
 .nv-utility{padding:4px 20px;gap:8px}.nv-utility-left{gap:8px}.nv-utility-right{gap:16px}
 .nv-utility-left>a,.nv-method{display:none!important}.nv-utility .mode-toggle__btn{padding:4px 8px}
 .nv-panel{display:none!important}
 .nv-mobile{border-top:1px solid var(--line);padding:12px 24px 60px;max-height:calc(100dvh - 74px);overflow:auto}
 .nv-mobile details{border-bottom:1px solid var(--line)}
 .nv-mobile summary{font:500 22px/1.4 var(--serif);cursor:pointer;padding:17px 0;list-style:none;display:flex;justify-content:space-between}
 .nv-mobile summary:after{content:"+";font:400 22px var(--sans)}.nv-mobile details[open]>summary:after{content:"−"}
 .nv-mobile .nv-groups{gap:18px;padding-bottom:24px}.nv-mobile .nv-groups:has(.nv-group:only-child){grid-template-columns:1fr}
 .nv-mobile-bottom{display:flex;gap:20px;flex-wrap:wrap;margin-top:18px}
 .nv-mobile-bottom>a,.nv-mobile-bottom>button{font-size:14px;min-height:44px;display:flex;align-items:center;color:var(--accent);background:none;border:0;padding:0}
}
@media(max-width:600px){
 .nv-mobile .nv-groups{grid-template-columns:1fr;gap:12px}
 .nv-mobile .nv-link{padding:9px 12px}
 .nv-welcome-head{padding:48px 24px 22px}.nv-paths{padding:0 24px 8px}
 .nv-path{grid-template-columns:20px 1fr 16px;gap:10px;padding:17px 0}
 .nv-path strong{font-size:16px}.nv-path small{font-size:13px}
 .nv-welcome-extra{padding:12px 24px;gap:0;flex-direction:column}
 .nv-welcome-bottom{padding:12px 24px;align-items:flex-start;flex-direction:column;gap:0}
 .nv-welcome-bottom small{font-size:11px}.nv-welcome h2{font-size:28px}
 .nv-welcome-mode{padding:12px 24px;flex-direction:column;align-items:flex-start;gap:8px}.nv-welcome-mode button{width:100%}
 .nv-directory{padding-top:36px}.nv-directory-grid{grid-template-columns:1fr;gap:32px;margin-top:32px}
 .nv-context{gap:4px;padding:10px 20px}.nv-context>span{width:100%;color:var(--ink-3)}
}
@media(prefers-reduced-motion:no-preference){.nv-link,.nv-trigger,.nv-path{transition:background-color .16s,color .16s}.nv-welcome[open]{animation:nv-enter .18s ease-out}@keyframes nv-enter{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}}
body[data-readability] .search-form{min-width:0}
body[data-readability] .search-form .search-input{min-width:0;flex:1 1 0;width:0}
@media(max-width:360px){.nv-bar{padding-inline:16px;gap:8px}.nv-logo svg.brand-lockup-a{width:132px!important}.nv-search{padding-inline:6px}.nv-shortcuts{gap:16px;padding-inline:16px}}