:root{--fgeo-shell-bg:#07111d;--fgeo-shell-panel:#0b1624;--fgeo-shell-line:#34465a;--fgeo-shell-text:#edf4f8;--fgeo-shell-muted:#6f86a0;--fgeo-shell-orange:#ff6b22;--fgeo-shell-blue:#79b5ff}
.fgeo-doc-shell{position:sticky;z-index:9999;top:0;display:block;width:100%;box-sizing:border-box;border-bottom:1px solid var(--fgeo-shell-line);background:color-mix(in srgb,var(--fgeo-shell-bg) 94%,transparent);color:var(--fgeo-shell-text);font-family:Arial,sans-serif;backdrop-filter:blur(14px)}
.fgeo-doc-shell *{box-sizing:border-box}.fgeo-doc-shell-inner{display:grid;grid-template-columns:minmax(12rem,1fr) auto;min-height:64px;align-items:center;width:min(1360px,calc(100% - 48px));margin:auto;gap:24px}.fgeo-doc-brand{display:inline-flex;align-items:center;gap:10px;color:var(--fgeo-shell-text)!important;text-decoration:none!important;font-size:14px;font-weight:800;letter-spacing:-.03em}.fgeo-doc-brand i{display:grid;width:28px;height:28px;place-items:center;border:1px solid var(--fgeo-shell-orange);border-radius:50%;color:var(--fgeo-shell-orange);font:normal 12px monospace}.fgeo-doc-brand b{color:var(--fgeo-shell-orange)}.fgeo-doc-nav{display:flex;align-items:center;gap:4px}.fgeo-doc-nav a{display:flex;min-height:42px;align-items:center;padding:0 12px;color:var(--fgeo-shell-text)!important;text-decoration:none!important;font-size:12px;font-weight:700}.fgeo-doc-nav a:hover,.fgeo-doc-nav a:focus-visible{background:var(--fgeo-shell-panel);color:var(--fgeo-shell-orange)!important;outline:2px solid transparent}.fgeo-doc-meta{display:flex;min-height:28px;align-items:center;width:min(1360px,calc(100% - 48px));margin:auto;border-top:1px solid color-mix(in srgb,var(--fgeo-shell-line) 55%,transparent);color:var(--fgeo-shell-muted);font:500 9px/1 monospace;letter-spacing:.08em;text-transform:uppercase}.fgeo-doc-shell~header,.fgeo-doc-shell~.top{display:none!important}@media(max-width:760px){.fgeo-doc-shell-inner{grid-template-columns:1fr;width:calc(100% - 32px);padding:12px 0;gap:8px}.fgeo-doc-nav{overflow-x:auto}.fgeo-doc-nav a{padding-inline:9px;white-space:nowrap}.fgeo-doc-meta{width:calc(100% - 32px)}}
@media(prefers-reduced-motion:reduce){.fgeo-doc-shell{backdrop-filter:none}}