/* Header is part of the page flow. Only the opened panel overlays the content. */
.zkr-header{position:relative;isolation:isolate;z-index:20;background:#fff;color:#172e48;color-scheme:light;border-bottom:1px solid #dbe2ea;box-shadow:none}
.zkr-header-inner{display:contents}
.zkr-header .brand{white-space:nowrap;color:#172e48;line-height:1}
.zkr-header nav{position:static;display:flex;align-items:center;justify-content:flex-end;flex:1;min-width:0}
.zkr-header .zkr-shortcuts{display:flex;align-items:center;gap:30px;margin-inline:auto}
.zkr-header nav a{white-space:normal;text-decoration:none}
.zkr-header nav .zkr-quick{display:flex;align-items:center;min-height:44px;color:var(--ink)}
.zkr-header .zkr-quick:hover,.zkr-header .zkr-quick[aria-current=page]{text-decoration:underline;text-underline-offset:5px}
.zkr-menu{position:static;margin:0;border:0;padding:0}
.zkr-menu .zkr-trigger{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:44px;padding:0 15px;list-style:none;border:1px solid #c1ab88;border-radius:8px;color:#23415e;background:#fff;cursor:pointer;font:600 15px/1.2 Arial,Helvetica,sans-serif;user-select:none}
.zkr-trigger::-webkit-details-marker{display:none}.zkr-trigger::marker{content:''}
.zkr-trigger:hover,.zkr-menu[open]>.zkr-trigger{background:#eef3f8}
.zkr-menu-icon{position:relative;width:18px;height:14px;color:#735f40}
.zkr-menu-icon i,.zkr-menu-icon:before,.zkr-menu-icon:after{position:absolute;left:0;width:18px;height:2px;background:currentColor;border-radius:2px;content:''}
.zkr-menu-icon:before{top:0}.zkr-menu-icon i{top:6px}.zkr-menu-icon:after{top:12px}
.zkr-menu[open] .zkr-menu-icon i{opacity:0}.zkr-menu[open] .zkr-menu-icon:before{top:6px;transform:rotate(45deg)}.zkr-menu[open] .zkr-menu-icon:after{top:6px;transform:rotate(-45deg)}
.zkr-panel{position:absolute;right:clamp(16px,4vw,48px);top:calc(100% + 5px);width:min(760px,calc(100% - 32px));box-sizing:border-box;max-height:calc(100vh - 82px);max-height:calc(100dvh - 82px);overflow-y:auto;overscroll-behavior:contain;background:#fff;color:#172e48;border:1px solid #c6ad83;border-radius:12px;box-shadow:0 16px 38px #142e4a26,0 4px 14px #ac89552b}
.zkr-menu:not([open])>.zkr-panel{display:none}
.zkr-header .zkr-search{margin:0;padding:16px 20px;background:#eef3f8;border-bottom:1px solid #d6dfe8}
.zkr-search label,.zkr-panel h2{display:block;margin:0 0 6px;font:700 14px/1.4 Arial,Helvetica,sans-serif;letter-spacing:0;color:#183854}
.zkr-search>div{display:flex;gap:8px}.zkr-header .zkr-search input{min-width:0;flex:1;width:0;border:1px solid #aebdce;border-radius:6px;background:#fff;padding:9px 12px;font:400 16px/1.4 Arial,Helvetica,sans-serif;color:#172e48}
.zkr-search button{min-height:44px;padding:8px 18px;border:0;border-radius:6px;background:#234d76;color:white;font-weight:650}
.zkr-panel-body{display:grid;grid-template-columns:minmax(150px,.72fr) minmax(0,1.6fr)}
.zkr-browse,.zkr-topics{padding:15px 18px}.zkr-browse{background:#faf8f4;border-right:1px solid #e5dac8}.zkr-browse h2:not(:first-child){margin-top:16px}
.zkr-topic-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:3px 8px}
.zkr-header nav .zkr-panel a{display:flex;align-items:center;min-height:44px;padding:6px 9px;color:#244562;line-height:1.28;border-radius:5px;font-size:14px;overflow-wrap:anywhere}
.zkr-header nav .zkr-panel a:hover,.zkr-header nav .zkr-panel a:focus-visible,.zkr-header nav .zkr-panel a[aria-current=page],.zkr-header nav .zkr-panel a.is-current{background:#e8eef5;color:#142f49}
.zkr-header nav .zkr-path:before,.zkr-header nav .zkr-topic:before{content:'';flex:none;width:5px;height:5px;margin-right:9px;border-radius:50%;background:#a88756}
.zkr-header :is(a,button,summary,input):focus-visible{outline:3px solid #bf944f;outline-offset:2px}
@media screen and (max-width:740px){
 .zkr-header .zkr-shortcuts{display:none}.zkr-menu .zkr-trigger{padding:0 12px}
 .zkr-panel{left:8px;right:8px;width:auto;max-height:calc(100vh - 68px);max-height:calc(100dvh - 68px)}
 .zkr-header .zkr-search{padding:12px}.zkr-panel-body{display:flex;flex-direction:column}.zkr-browse,.zkr-topics{padding:12px}.zkr-browse{display:grid;grid-template-columns:1fr 1fr;border-right:0;border-bottom:1px solid #e5dac8}.zkr-browse h2{grid-column:1/-1}.zkr-browse h2:not(:first-child){margin-top:10px}
 .zkr-topic-grid{gap:2px 4px}.zkr-header nav .zkr-panel a{font-size:14px}
}
@media screen and (max-width:350px){.zkr-header .brand .dot{display:none}.zkr-header .brand{font-size:16px}.zkr-search button{padding:8px 10px}}
@media print{.zkr-header{background:transparent;color:#172e48;box-shadow:none;border-bottom:1px solid #aaa}.zkr-header-inner{min-height:0;padding:5px 0}.zkr-header .brand,.zkr-header .brand span{color:#172e48}.zkr-header nav{display:none!important}}

/* Founding-year signature: decorative gold rosette, no certification claim. */
.brand-lockup{display:flex;flex-direction:column;align-items:flex-start;gap:1px;flex-shrink:0}
.brand-heritage{align-self:flex-start;margin-left:50%;white-space:nowrap;display:flex;align-items:center;gap:8px;color:#725a2d;font-size:11px;font-weight:600;letter-spacing:.055em;line-height:1.3}
.heritage-seal{display:block;flex:none;filter:drop-shadow(0 1px 2px rgb(143 108 40 / 18%))}
@media(max-width:600px){.brand-heritage{font-size:10px;letter-spacing:.025em;gap:6px}.heritage-seal{width:22px;height:24px}}