/* Shared navigation. Page artwork, palettes and in-article navigation stay local. */
.masthead{--nav-paper:#f8f9f3;--nav-ink:#283b2f;--nav-line:#d8e0cd;--nav-accent:#426035;--nav-tint:#eaf0df;position:relative;z-index:30;width:min(1280px,calc(100% - 80px));margin:0 auto;color:var(--nav-ink);font-family:'Manrope',Arial,sans-serif;border-bottom:1px solid var(--nav-line)}
.masthead--support{--nav-paper:#faf7ef;--nav-accent:#93462b;--nav-tint:#f4e8da;--nav-line:#dedacb}
.masthead--journal{--nav-paper:#f8f6ed;--nav-accent:#405c34;--nav-tint:#e9eedb}
.masthead--galaxy{--nav-paper:#f9f8ff;--nav-ink:#30253f;--nav-accent:#7043a6;--nav-tint:#eee6fb;--nav-line:#e0d7ee}
.masthead *{box-sizing:border-box}.masthead [hidden]{display:none!important}
.masthead-row{position:relative;display:flex;align-items:center;gap:20px;min-height:92px}
.masthead a{text-decoration:none;color:inherit;overflow-wrap:normal}
.masthead-brand{display:inline-flex;align-items:center;gap:9px;white-space:nowrap;flex-shrink:0;min-height:44px;font-size:23px;letter-spacing:-1px;line-height:1.2}
.masthead-brand strong{font-weight:800}.masthead-brand strong>span{font-weight:450;color:var(--nav-accent)}
.masthead-mark{display:grid;place-items:center;width:32px;height:34px;padding-right:3px;border:1px solid var(--nav-accent);border-radius:9px;background:var(--nav-tint);font:21px/1 'Space Mono',monospace;letter-spacing:-4px}
.masthead-menu{margin-left:auto}.masthead-nav{display:flex;align-items:center;gap:3px}
.masthead-nav a{display:flex;align-items:center;justify-content:center;min-height:44px;padding:10px 12px;border:1px solid transparent;border-radius:9px;font-size:12px;font-weight:550;line-height:1.5;white-space:nowrap;transition:background-color .16s,color .16s}
.masthead-nav a:hover{background:var(--nav-tint);color:var(--nav-accent)}
.masthead-nav a[aria-current]{background:var(--nav-tint);border-color:var(--nav-line);color:var(--nav-accent);font-weight:800}
.masthead-actions{display:flex;align-items:center;gap:10px}.masthead-actions:empty{display:none}
.masthead .masthead-motion,.masthead-toggle,.masthead-cta{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:44px;border:1px solid var(--nav-line);border-radius:99px;background:var(--nav-paper);color:var(--nav-accent);padding:9px 12px;font:600 11px/1.4 'Manrope',Arial,sans-serif;white-space:nowrap;cursor:pointer}
.masthead .masthead-motion{width:auto;flex-direction:row}.masthead [data-motion-icon]{font-size:15px;line-height:1}.masthead .masthead-motion [data-motion-label]{display:inline}.masthead .masthead-motion-short{display:none}
.masthead .masthead-cta{color:var(--nav-ink);border-color:var(--nav-accent);gap:15px}
.masthead-toggle{display:none;gap:10px;color:var(--nav-ink)}
.masthead-menu-icon{display:flex;flex-direction:column;gap:5px;width:15px}.masthead-menu-icon i{display:block;width:15px;height:1.5px;background:currentColor;transition:transform .16s}
.masthead-toggle[aria-expanded=true] .masthead-menu-icon i:first-child{transform:translateY(3.25px) rotate(45deg)}
.masthead-toggle[aria-expanded=true] .masthead-menu-icon i:last-child{transform:translateY(-3.25px) rotate(-45deg)}
.masthead :is(a,button):focus-visible{outline:2px solid var(--nav-accent);outline-offset:3px}
.masthead-local{display:flex;justify-content:flex-end;align-items:center;gap:24px;padding:0 0 10px;font-size:12px;line-height:1.5}
.masthead-local a{display:flex;align-items:center;min-height:44px;white-space:nowrap}.masthead-local a:hover{text-decoration:underline;text-underline-offset:4px}
@media(max-width:1119px){
 .masthead{width:calc(100% - 48px)}.masthead-row{min-height:80px;gap:14px;flex-wrap:wrap}.masthead .masthead-cta{display:none}
 .masthead:not([data-nav-ready]) .masthead-menu{order:3;width:100%;margin:0 0 12px}.masthead:not([data-nav-ready]) .masthead-nav{flex-wrap:wrap;gap:4px}.masthead:not([data-nav-ready]) .masthead-actions{margin-left:auto}
 .masthead[data-nav-ready] .masthead-toggle{display:inline-flex}.masthead[data-nav-ready] .masthead-nav{position:absolute;top:calc(100% + 7px);left:0;right:0;z-index:2;display:flex;flex-direction:column;align-items:stretch;gap:4px;padding:10px;background:var(--nav-paper);border:1px solid var(--nav-line);border-radius:14px;box-shadow:0 14px 36px #252c231a;max-height:calc(100vh - 110px);max-height:min(420px,calc(100svh - 110px));overflow-y:auto;overscroll-behavior:contain}
 .masthead[data-nav-ready] .masthead-nav a{justify-content:flex-start;padding:11px 14px;font-size:14px;flex-shrink:0}
 .masthead-local{justify-content:flex-start;gap:22px;overflow-x:auto;padding-bottom:9px;scrollbar-width:thin}.masthead-local a{flex-shrink:0}
}
@media(max-width:480px){
 .masthead{width:calc(100% - 32px)}.masthead-row{min-height:76px;gap:10px}.masthead-brand{font-size:21px;gap:7px}.masthead-mark{width:29px;height:31px;font-size:20px}
 .masthead-toggle{padding-inline:13px;font-size:12px}.masthead .masthead-motion{flex-direction:column;gap:3px;width:52px;padding:5px;border-radius:12px}.masthead .masthead-motion [data-motion-label]{display:none}.masthead .masthead-motion-short{display:block;font-size:9px}
 .masthead-local{gap:20px;font-size:11px}
}
@media(prefers-reduced-motion:reduce){.masthead *{transition:none!important}}
.no-motion .masthead *{transition:none!important}
@media print{.masthead{display:none!important}}