/* Hover requires a precise hovering input, preventing sticky touch states.
   Selected and keyboard-focus states remain available on every input. */
.header{z-index:100;position:relative}.nav-shell{position:relative}.desktop-nav{gap:25px}.nav-dropdown{position:static}.nav-dropdown>summary{list-style:none;display:flex;gap:7px;align-items:center;font-size:12px;cursor:pointer;white-space:nowrap;padding:26px 0}.nav-dropdown>summary::-webkit-details-marker{display:none}.nav-dropdown>summary span{color:#888;font-size:12px;transition:transform .18s}.nav-dropdown[open]>summary span{transform:rotate(180deg)}.nav-dropdown[open]>summary{color:#317cff}.nav-mega{position:absolute;left:0;right:0;top:calc(100% - 1px);padding:28px 32px 34px;background:#fafafa;border:1px solid #e4e4e4;box-shadow:0 16px 26px #00000008;display:grid;grid-template-columns:130px 1fr;gap:25px;z-index:101}.nav-mega-label{font:10px var(--marketing-sans);letter-spacing:.05em;color:#999;padding:12px 0}.nav-mega-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.nav-mega-grid a{display:block!important;padding:14px 16px!important;border-radius:3px;color:#222!important;transition:background .15s}@media (hover: hover) and (pointer: fine){.nav-mega-grid a:hover{background:#ededed}}.nav-mega-grid strong{font-size:14px;font-weight:400;display:flex;justify-content:space-between;gap:8px}.nav-mega-grid strong span{font-size:11px;color:#999}.nav-mega-grid small{font-size:12px;line-height:1.5;display:block;color:#999;margin-top:6px;white-space:normal}.footer-extra{grid-column:1/-1;display:flex!important;flex-direction:row!important;flex-wrap:wrap;gap:30px!important;border-top:1px solid #ddd;padding-top:28px}.mobile-nav details{border-bottom:1px solid #eee;padding:12px 0}.mobile-nav details summary{font-size:15px;cursor:pointer}.mobile-nav details a{padding:11px 15px;font-size:13px}.nav-dropdown summary:focus-visible,.nav-mega a:focus-visible{outline:2px solid #317cff;outline-offset:4px}.mobile-nav{max-height:80vh;overflow:auto}.nav-dropdown[open] .nav-mega{animation:navEnter .15s ease-out}@keyframes navEnter{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}@media(min-width:901px) and (max-width:1180px){.desktop-nav{gap:15px}.header-actions .quiet-link{display:none}.nav-shell{gap:20px}.nav-mega-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:1000px){.desktop-nav{gap:15px}.header-actions .quiet-link{display:none}}@media(max-width:900px){.desktop-nav{display:none!important}.menu-toggle{display:block!important}.header-actions{margin-left:auto}.nav-shell{min-height:70px}.footer-extra{gap:18px!important}.header-actions .small{font-size:11px;padding:9px 13px}.mobile-nav:not([hidden]){display:flex!important;flex-direction:column;gap:0;padding:15px 30px}.nav-mega{display:none}}@media(prefers-reduced-motion:reduce){.nav-dropdown[open] .nav-mega{animation:none}.nav-dropdown>summary span{transition:none}}
.header{position:sticky;top:0}.nav-dropdown>summary{padding:0;min-height:28px;align-items:center}.desktop-nav{align-items:center}@media(max-width:900px){.nav-shell{min-height:60px}.header{height:auto;min-height:60px}.mobile-nav{top:60px}}
/* Drawn arrow icons remain crisp with the site's bundled or system fonts. */
.route-arrow{display:inline-block;width:14px;height:14px;flex:none;vertical-align:-2px;overflow:visible;color:inherit}.button .route-arrow,.page-btn .route-arrow,.page-link .route-arrow{width:13px;height:13px}.nav-mega .route-arrow{width:11px;height:11px}.art-arrow .route-arrow{width:18px;height:18px}

/* Finger-friendly navigation, including narrow phones and short landscape screens. */
@media(width < 1024px){
 .desktop-nav{display:none!important}
 .menu-toggle{display:grid!important;place-items:center;flex:none;width:44px;min-width:44px;height:44px;padding:0;line-height:1;cursor:pointer;border-radius:3px;color:#191919}
 .nav-shell{min-height:64px;gap:12px;padding-inline:24px}
 .header{height:auto;min-height:64px}
 .header-actions{margin-left:auto;gap:8px;min-width:0}
 .header-actions .quiet-link{display:none}
 .header-actions .button.small{min-height:44px;font-size:11px;padding:10px 12px;gap:9px;white-space:nowrap}
 .mobile-nav{top:64px;max-height:calc(100vh - 64px);max-height:calc(100dvh - 64px);overscroll-behavior:contain;padding-bottom:max(24px,env(safe-area-inset-bottom))!important}
 .mobile-nav:not([hidden]){display:flex!important;flex-direction:column;gap:0;padding:12px 24px 24px;box-shadow:0 14px 22px #00000008}
 .mobile-nav details{padding:4px 0}
 .mobile-nav details summary{min-height:48px;display:flex;align-items:center;justify-content:space-between;font-size:15px;list-style:none}
 .mobile-nav details summary::-webkit-details-marker{display:none}
 .mobile-nav details summary:after{content:'+';font-size:20px;font-weight:400;color:#777}
 .mobile-nav details[open] summary:after{content:'−'}
 .mobile-nav a,.mobile-nav details a{display:flex;align-items:center;min-height:46px;padding:12px 14px;font-size:14px;line-height:1.45}
 .mobile-nav>a{padding-inline:0}
 .mobile-nav details a{border-left:1px solid #ddd;margin-left:3px}
 .menu-toggle:focus-visible,.mobile-nav a:focus-visible,.mobile-nav summary:focus-visible{outline:2px solid #317cff;outline-offset:2px}
 .nav-mega{display:none}
}
@media(max-width:430px){.nav-shell{padding-inline:16px;gap:8px}.brand{font-size:19px;gap:7px}.brand img{width:24px;height:24px}.header-actions{gap:4px}.mobile-nav:not([hidden]){padding-inline:20px}}
@media(max-width:360px){.header-actions .button.small{font-size:10px;padding-inline:9px;gap:0}.header-actions .button.small>span:not(.cta-roll){display:none}}

@media(min-width:1024px){.mobile-nav{display:none!important}}

/* Paint the header under the status bar; keep controls below the notch. The
   menu tracks the visible viewport and contains scroll without locking the page. */
.header{padding-top:env(safe-area-inset-top,0px);height:calc(64px + env(safe-area-inset-top,0px))}
.nav-shell{height:64px}
@media(width < 1024px){
 .header{height:auto}
 .mobile-nav{top:100%;max-height:calc(100vh - 64px - env(safe-area-inset-top,0px));max-height:calc(100dvh - 64px - env(safe-area-inset-top,0px));overflow-y:auto;overscroll-behavior:contain;padding-bottom:calc(24px + env(safe-area-inset-bottom,0px))!important}
}
/* Reference navigation rhythm: keep links beside the wordmark instead of
   distributing the three groups across the whole header. */
@media(min-width:1024px){
 .header{height:calc(52px + env(safe-area-inset-top,0px));min-height:52px}
 .nav-shell{height:52px;min-height:52px;padding-inline:60px;justify-content:flex-start;gap:48px}
 .desktop-nav{gap:25px;margin:0}
 .desktop-nav a,.nav-dropdown>summary{font-size:13px}
 .header-actions{margin-left:auto;gap:12px}
 .header-actions .button.small{font-size:12px;min-height:28px;padding:5px 13px}
}
@media(min-width:1024px) and (max-width:1120px){.nav-shell{padding-inline:32px;gap:32px}.desktop-nav{gap:18px}}

/* Audited against the live reference at 1180px: 52px bar, 60px page
   gutters, contiguous 28px navigation targets, and compact action cluster.
   Header rules are scoped so editorial details styles cannot leak into menus. */
.header .nav-shell{max-width:1400px}
.header .nav-dropdown{border:0!important;padding:0!important;margin:0}
.header .nav-dropdown>summary{border:0;line-height:20px;font-weight:400;border-radius:100px;color:#191919}
.header .nav-dropdown>summary>span{display:inline-block;width:10px;height:10px;padding:0;font-size:0;color:currentColor;position:relative}
.header .nav-dropdown>summary>span:after{content:'';position:absolute;width:5px;height:5px;border-right:1px solid;border-bottom:1px solid;transform:rotate(45deg);left:2px;top:0}
.header .nav-dropdown[open]>summary{color:#191919;background:#ededed}
.header .nav-dropdown[open]>summary>span{transform:rotate(180deg)}
.header .header-actions .nav-guide{border:1px solid #e5e5e5;border-radius:100px;text-decoration:none;white-space:nowrap}
.header .header-actions .button.small{white-space:nowrap}
@media(min-width:1024px){
 .header .nav-shell{padding:0 60px;height:52px;min-height:52px;gap:20px;justify-content:flex-start}
 .header .brand{font-size:20px;line-height:20px;letter-spacing:-.6px;gap:6px;flex:none}
 .header .brand img{width:20px;height:20px}
 .header .desktop-nav{display:flex;gap:0;align-items:center}
 .header .desktop-nav>a,.header .nav-dropdown>summary{display:flex;align-items:center;height:28px;min-height:28px;padding:1px 12px 0;font-size:14px;line-height:20px;white-space:nowrap}
 .header .nav-dropdown>summary{padding-right:8px;gap:5px}
 .header .header-actions{margin-left:auto;gap:6px}
 .header .header-actions .quiet-link,.header .header-actions .nav-guide,.header .header-actions .button.small{display:inline-flex;align-items:center;justify-content:center;height:28px;min-height:28px;padding:0 12px;font-size:14px;line-height:21px;letter-spacing:0}
 .header .header-actions .button.small{background:#000;border-color:#000;gap:0}
 .header .header-actions .button.small .route-arrow{display:none}
 .header .nav-mega{left:0;right:0;top:52px;border:0;border-bottom:1px solid #eee;border-radius:0;background:#fff;padding:24px 60px 32px;display:block;box-shadow:0 10px 20px #00000006}
 .header .nav-mega-label{padding:0 0 14px;font-family:inherit;font-size:14px;line-height:20px;text-transform:none;letter-spacing:0;color:#777}
 .header .nav-mega-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:16px 28px}
 .header .nav-mega-grid a{padding:0!important;border-radius:0}
 .header .nav-mega-grid strong{font-size:16px;line-height:22px;justify-content:flex-start}
 .header .nav-mega-grid small{display:none}
}
@media(width < 1024px){
 .header .header-actions .nav-guide,.header .header-actions .quiet-link{display:none}
 .header .nav-shell{height:60px;min-height:60px;padding-inline:20px}
 .header{min-height:60px}
 .header .brand{font-size:20px;gap:6px}
 .header .brand img{width:22px;height:22px}
 .header .header-actions .button.small{font-size:13px;min-height:32px;height:32px;padding:0 12px;gap:0}
 .header .header-actions .button.small .route-arrow{display:none}
 .header .menu-toggle{width:36px;min-width:36px;height:36px;font-size:0;position:relative;background:transparent;border:0}
 .header .menu-toggle:before,.header .menu-toggle:after{content:'';position:absolute;left:9px;width:18px;height:1px;background:currentColor;transition:transform .15s}
 .header .menu-toggle:before{top:14px}.header .menu-toggle:after{top:21px}
 .header .menu-toggle[aria-expanded=true]:before{top:18px;transform:rotate(45deg)}
 .header .menu-toggle[aria-expanded=true]:after{top:18px;transform:rotate(-45deg)}
}
@media(hover:hover) and (pointer:fine){.header .desktop-nav>a:hover,.header .nav-dropdown>summary:hover{background:#ededed;border-radius:100px}}

/* Expanded-menu state audit: full-width white sheet, 5/24-width columns,
   12px top +32px bottom, blue text hover, and a separate 4px blur layer. */
.nav-backdrop{display:none}
@media(min-width:1024px){
 .header .nav-shell{z-index:2;background:#f8f8f8}
 .header .nav-backdrop{display:block;position:fixed;inset:52px 0 0;z-index:0;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);opacity:0;pointer-events:none;transition:opacity .1s cubic-bezier(0,0,.2,1)}
 .header.nav-expanded .nav-backdrop{opacity:1;pointer-events:auto}
 .header .nav-mega{position:absolute;top:52px;left:0;right:0;width:auto;margin:0;padding:0;background:#fff;border:0;border-bottom:1px solid rgba(0,0,0,.04);box-shadow:0 8px 16px #00000006;z-index:3}
 .header .nav-panel-grid{display:grid;grid-template-columns:repeat(24,minmax(0,1fr));max-width:1400px;margin:auto;padding:12px 60px 32px;gap:0;align-items:start}
 .header .nav-panel-column{grid-column:span 5;display:flex;flex-direction:column;align-items:stretch;min-width:0}
 .header .nav-panel-heading{font-family:inherit;font-size:14px;line-height:19.6px;letter-spacing:0;font-weight:400;color:#777;margin-bottom:4px}
 .header .nav-panel-column>a{display:flex;padding:4px 0!important;font-size:16px;line-height:22.4px;letter-spacing:0;font-weight:400;color:#000!important;background:transparent!important;border:0!important;border-radius:2px;text-decoration:none;transition:none}
 .header .nav-panel-column>a:last-child{padding-bottom:0!important}
 .header .nav-panel-column>a:focus-visible{outline:2px solid currentColor;outline-offset:4px}
 .header .nav-dropdown[open] .nav-mega{animation:navPanelFade .1s ease-out}
 .header .nav-dropdown>summary:focus-visible{outline:2px solid #191919;outline-offset:-2px}
 .header .nav-dropdown>summary>span{transition:transform .1s ease-out}
 .header .header-actions>a{transition:none!important}
}
@media(min-width:1024px) and (hover:hover) and (pointer:fine){
 .header .header-actions .button.small:hover{transform:none;opacity:.8;background:#000}

 .header .nav-panel-column>a:hover{color:#317cff!important;background:transparent!important}
 .header .header-actions .quiet-link:hover,.header .header-actions .nav-guide:hover{color:#191919;background:#ededed}
}
@keyframes navPanelFade{from{opacity:0}to{opacity:1}}
@media(prefers-reduced-motion:reduce){.header .nav-backdrop,.header .nav-dropdown>summary>span{transition:none}.header .nav-dropdown[open] .nav-mega{animation:none}}

/* Actual narrow reference: wordmark and menu only; the action group sits below
   the scrolling menu body, never alongside the wordmark. */
@media(width < 1024px){
 body:has(.header .mobile-nav:not([hidden])){overflow:hidden}
 .header .header-actions>a{display:none!important}
 .header .mobile-nav:not([hidden]){position:fixed!important;top:calc(60px + env(safe-area-inset-top,0px));left:0;right:0;bottom:0;max-height:none!important;height:calc(100dvh - 60px - env(safe-area-inset-top,0px));padding:0!important;gap:0;background:#f8f8f8;box-shadow:none;border:0;overflow:hidden!important;overscroll-behavior:contain}
 .header .nav-mobile-body{flex:1;min-height:0;overflow-y:auto;overscroll-behavior:contain;padding:0 20px 24px}
 .header .nav-mobile-body>details{margin:0;padding:0;border:0;border-bottom:1px solid #e6e6e6}
 .header .nav-mobile-body>details>summary{display:flex;justify-content:space-between;align-items:center;min-height:49px;height:49px;padding:0;font-size:16px;line-height:22.4px;font-weight:400;list-style:none}
 .header .nav-mobile-body>details>summary:after{content:'';width:6px;height:6px;border-right:1px solid #191919;border-bottom:1px solid #191919;transform:rotate(45deg);margin-right:3px;font-size:0;transition:transform .1s}
 .header .nav-mobile-body>details[open]>summary:after{transform:rotate(225deg)}
 .header .nav-mobile-body>a{min-height:49px;height:49px;padding:0;font-size:16px;line-height:22.4px;border-bottom:1px solid #e6e6e6}
 .header .nav-mobile-groups{display:flex;flex-direction:column;gap:20px;padding:7px 0 26px 12px}
 .header .nav-mobile-group{display:flex;flex-direction:column}
 .header .nav-mobile-group .nav-panel-heading{font-size:14px;line-height:20px;color:#777;padding:0;margin:0 0 4px}
 .header .nav-mobile-group>a{font-size:16px;line-height:22.4px;min-height:44px;padding:10px 0;border:0;margin:0}
 .header .nav-mobile-footer{flex:none;padding:10px 20px calc(20px + env(safe-area-inset-bottom,0px));background:#f8f8f8}
 .header .nav-mobile-footer .nav-mobile-explore{justify-content:center;min-height:44px;padding:10px 0;font-size:16px}
 .header .nav-mobile-actions{display:flex;gap:8px}
 .header .nav-mobile-actions>a{flex:1;justify-content:center;border:1px solid #e0e0e0;border-radius:100px;min-height:42px;padding:10px 12px;font-size:16px;line-height:20px}
 .header .nav-mobile-actions .nav-mobile-primary{background:#000;color:white;border-color:#000}
}
@media(min-width:1024px){
 .header{backdrop-filter:none!important;-webkit-backdrop-filter:none!important}
 .header .nav-mega{position:fixed;top:calc(52px + env(safe-area-inset-top,0px));left:0;right:0;width:auto}
 .header .nav-backdrop{top:calc(52px + env(safe-area-inset-top,0px))}
}
@media(width < 1024px){.header{backdrop-filter:none!important;-webkit-backdrop-filter:none!important}}
/* Native narrow-reference QA: top inset and left-aligned intrinsic actions. */
@media(width < 1024px){
 .header .nav-mobile-body{padding-top:15px}
 .header .nav-mobile-footer .nav-mobile-explore{justify-content:flex-start}
 .header .nav-mobile-actions{justify-content:flex-start}
 .header .nav-mobile-actions>a{flex:0 0 auto;min-width:0;padding-inline:20px}
}
/* Reference popup's white background extends upward behind the entire desktop
   bar. Keep the expanded bar and sheet one continuous white surface. */
@media(min-width:1024px){
 .header,.header .nav-shell{transition:background-color .1s cubic-bezier(0,0,.2,1)}
 .header.nav-expanded,.header.nav-expanded .nav-shell{background:#fff}
}
@media(min-width:1024px) and (prefers-reduced-motion:reduce){.header,.header .nav-shell{transition:none}}
/* Reference pointer states retain text color and use a translucent 6% fill. */
@media(min-width:1024px){
 .header .desktop-nav>a,.header .nav-dropdown>summary{color:#000;transition:none}
 .header .nav-dropdown[open]>summary{color:#000;background:rgba(0,0,0,.06)}
}
@media(min-width:1024px) and (hover:hover) and (pointer:fine){
 .header .desktop-nav>a:hover,.header .nav-dropdown>summary:hover{color:#000;background:rgba(0,0,0,.06)}
 .header .header-actions .quiet-link:hover,.header .header-actions .nav-guide:hover{color:#191919;background:rgba(0,0,0,.06)}
}

/* Measured shared footer: 5-track outer grid, two-track identity and a nested
   three-column link grid. Keep Dayflow destinations and truthful attribution. */
.footer.reference-footer{display:block;max-width:1400px;padding:0 60px;margin-inline:auto;border:0;gap:0}
.footer.reference-footer .footer-reference-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:0;min-height:360px;padding:64px 0;border-top:1px solid rgba(25,25,25,.08)}
.footer.reference-footer .footer-identity{grid-column:span 2;display:flex;flex-direction:column;align-items:flex-start;justify-content:space-between;gap:48px;padding-right:32px}
.footer.reference-footer .footer-links{grid-column:span 3;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:40px 16px;align-content:start}
.footer.reference-footer .footer-column{display:flex;flex-direction:column;align-items:flex-start;gap:4px;min-width:0}
.footer.reference-footer .footer-column h3{font-family:inherit;font-size:14px;font-weight:400;line-height:19.6px;letter-spacing:0;color:#191919;margin:0 0 4px;padding:0}
.footer.reference-footer .footer-column a{font-family:inherit;font-size:14px;line-height:19.6px;font-weight:400;letter-spacing:0;color:rgba(25,25,25,.4);margin:0;padding:0;transition:none;text-decoration:none}
.footer.reference-footer .brand{font-size:30px;line-height:32px;letter-spacing:-1px;font-weight:500;color:rgba(25,25,25,.4);gap:8px}
.footer.reference-footer .brand img{width:30px;height:30px;filter:grayscale(1);opacity:.4}
.footer.reference-footer .footer-attribution{display:flex;flex-direction:column;align-items:flex-start;gap:0;color:rgba(25,25,25,.4);font-family:var(--marketing-sans);font-size:11px;line-height:13px;letter-spacing:0}
@media(hover:hover) and (pointer:fine){.footer.reference-footer a:hover{color:#337df4}}
.route-university>.footer.reference-footer,.route-changelog>.footer.reference-footer{display:none}
.footer.reference-footer .footer-attribution{line-height:13.85px}
@media(width < 768px){
 .footer.reference-footer{padding-inline:20px}
 .footer.reference-footer .footer-reference-grid{grid-template-columns:minmax(0,1fr);gap:48px;padding-block:64px}
 .footer.reference-footer .footer-identity{grid-column:auto;padding:0;justify-content:flex-start;gap:48px}
 .footer.reference-footer .footer-links{grid-column:auto;grid-template-columns:repeat(2,minmax(0,1fr));gap:40px 24px}
}
.footer.reference-footer{padding-bottom:env(safe-area-inset-bottom,0px)}
/* Match the footer wordmark's gray treatment for the orange source symbol. */
.footer.reference-footer .brand img{filter:brightness(0);opacity:.36}

@media(prefers-reduced-motion:reduce){.header .menu-toggle:before,.header .menu-toggle:after,.header .nav-mobile-body>details>summary:after{transition:none}}

/* Keep the reference's 18px mobile glyph while giving touch a full target.
   The negative end margin preserves the visible icon's existing alignment. */
@media(width < 1024px) and (any-pointer:coarse){
 .header .menu-toggle{width:44px;min-width:44px;height:44px;margin-right:-4px}
 .header .menu-toggle:before,.header .menu-toggle:after{left:13px}
 .header .menu-toggle:before{top:18px}
 .header .menu-toggle:after{top:25px}
 .header .menu-toggle[aria-expanded=true]:before,.header .menu-toggle[aria-expanded=true]:after{top:22px}
}
/* Expanded phone shell, measured on both reference homepage and /cli at393px.
   Keep route-specific surfaces and reserve scrolling only for opened groups. */
@media(width < 1024px){
 .header{--mobile-menu-surface:248 248 248}
 body[class^="route-"] .header{--mobile-menu-surface:252 252 252}
 body.route-brand .header,body.route-windows .header{--mobile-menu-surface:248 248 248}
 .header .mobile-nav:not([hidden]){background:rgb(var(--mobile-menu-surface)/.95);backdrop-filter:blur(12px)}
 .header .nav-mobile-body{padding:16px 20px 0}
 .header .nav-mobile-body>details,.header .nav-mobile-body>a{border-bottom-color:rgba(0,0,0,.06)}
 .header .nav-mobile-body>details>summary,.header .nav-mobile-body>a{height:48px;min-height:48px;line-height:24px}
 .header .nav-mobile-footer{display:flex;flex-direction:column;gap:12px;padding:20px 20px calc(24px + env(safe-area-inset-bottom,0px));background:transparent}
 .header .nav-mobile-footer .nav-mobile-explore{width:fit-content;min-height:0;padding:5px 16px 4px;line-height:24px}
 .header .nav-mobile-actions{gap:12px;align-items:center}
 .header .nav-mobile-actions>a{min-height:0;padding:5px 16px 4px;line-height:24px;border-color:rgba(0,0,0,.08)}
 .header .nav-mobile-actions .nav-mobile-primary{border-color:#000}
}
@media(width < 1024px) and (any-pointer:coarse){
 .header .nav-mobile-footer .nav-mobile-explore,.header .nav-mobile-actions>a{min-height:44px}
}
/* Reference menu's translucent layer sits over its same-color full-screen header.
   Our separate fixed sheet needs the equivalent opaque surface to avoid page ghosts. */
@media(width < 1024px){
 .header .mobile-nav:not([hidden]){background:rgb(var(--mobile-menu-surface))}
 .header .nav-mobile-body>a{height:auto;min-height:48px;padding:12px 0}
}
/* Verified reference home navigation is an opaque surface while closed too. */
.homepage>.header:not(.nav-expanded){background:#f8f8f8}
@media(width < 1024px){.header{border-bottom:0}}
/* The fixed menu spans the viewport rather than the safe-area-padded body.
   Keep its 20px gutters outside landscape notches on either side. */
@media(width < 1024px){
 .header .nav-mobile-body,.header .nav-mobile-footer{
  padding-left:calc(20px + env(safe-area-inset-left,0px));
  padding-right:calc(20px + env(safe-area-inset-right,0px));
 }
}
/* Match the reference trigger's14px chevron box and4px label gap. */
.header .nav-dropdown>summary{gap:4px}
.header .nav-dropdown>summary>span{display:flex;align-items:center;justify-content:center;width:14px;height:14px;flex:none}
.header .nav-dropdown>summary>span:after{content:none}
.header .nav-dropdown>summary>span svg{display:block;width:14px;height:14px}

/* Fresh public dropdown inspection: keep the sheet inside the viewport,
   with the same subtle surface shadow and four-pixel entrance motion. */
@media(min-width:1024px){
 .header .nav-mega{max-height:calc(100dvh - 52px);overflow-y:auto;overscroll-behavior:contain;border-bottom-color:rgba(0,0,0,.06);box-shadow:0 10px 15px -3px rgba(0,0,0,.06)}
}
@keyframes navPanelFade{from{opacity:0;translate:0 -4px}to{opacity:1;translate:0 0}}

/* Fresh reference .page-container media rules: 20px by default, 40px
   from 768px, and 60px from 1024px. Match both shared outer rails. */
@media(min-width:768px) and (width < 1024px){
 .header .nav-shell,.footer.reference-footer{padding-inline:40px}
}

/* Fresh reference: one 100ms ease-out sheet, including exit and menu-height changes.
   nav.js owns desktop motion; semantic <details> closure is never delayed. */
@media(min-width:1024px){
 .header .nav-dropdown[open] .nav-mega{animation:none}
 .header .nav-exit-visual{display:block;pointer-events:none!important;overflow:hidden;animation:none}
}
@media(width <1024px){.header .nav-exit-visual{display:none}}
@media(prefers-reduced-motion:reduce){.header .nav-exit-visual{display:none}}