/* Shared navigation feedback; scene animation remains independent. */
.site-header nav a{position:relative;display:inline-block;transition:color 180ms ease,transform 180ms ease,text-shadow 180ms ease}
.site-header nav a::after{content:"";position:absolute;height:2px;left:0;right:0;bottom:-6px;border-radius:2px;background:#64b5ff;transform:scaleX(0);transform-origin:center;transition:transform 220ms cubic-bezier(.22,1,.36,1);pointer-events:none}
.site-header nav a[aria-current]{color:#a8d6ff}
.site-header nav a[aria-current]::after,.site-header nav a:focus-visible::after{transform:scaleX(1)}
.site-header a:focus-visible{outline:2px solid #a8d6ff;outline-offset:6px;border-radius:4px}
.site-header .brand,.site-header .demo{transition:transform 180ms ease,box-shadow 180ms ease}
@media(hover:hover) and (pointer:fine){.site-header nav a:hover{color:#a8d6ff;transform:translateY(-2px);text-shadow:0 0 16px rgba(100,181,255,.35)}.site-header nav a:hover::after{transform:scaleX(1)}.site-header .demo:hover{transform:translateY(-2px);box-shadow:0 6px 22px rgba(33,142,255,.3)}}
.site-header nav a:active,.site-header .brand:active,.site-header .demo:active{transform:scale(.96)}
@media(max-width:900px){.site-header nav a::after{left:9px;right:9px;bottom:3px}}
@media(prefers-reduced-motion:reduce){.site-header a,.site-header nav a::after{transition:none!important}.site-header a:hover,.site-header a:active{transform:none!important}}

/* Mobile dropdown shared by the homepage and Researchers. */
.site-header .nav-menu-toggle{display:none}
@media(max-width:900px){
 .site-header .nav-menu-toggle{display:inline-flex;align-items:center;justify-content:center;gap:8px;margin-left:auto;height:38px;padding:0 12px;border:1px solid rgba(255,255,255,.22);border-radius:999px;background:rgba(30,40,55,.75);color:#fff;font:13px Geist,Arial,sans-serif;cursor:pointer}
 .site-header .nav-menu-icon{position:relative;width:14px;height:12px;border-top:1px solid currentColor;border-bottom:1px solid currentColor}
 .site-header .nav-menu-icon::after{content:"";position:absolute;left:0;right:0;top:5px;border-top:1px solid currentColor;transition:transform 180ms ease}
 .site-header.is-menu-open .nav-menu-icon::after{transform:rotate(90deg)}
 .site-header nav,.current-site-header nav{position:absolute;left:auto;right:0;top:54px;transform:translateY(-8px);display:grid;gap:4px;width:min(280px,calc(100vw - 32px));margin:0;padding:12px;border:1px solid rgba(255,255,255,.2);border-radius:20px;background:rgba(8,16,28,.96);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);box-shadow:0 16px 40px rgba(0,0,0,.3);opacity:0;visibility:hidden;pointer-events:none;transition:opacity 220ms ease,transform 220ms cubic-bezier(.22,1,.36,1),visibility 220ms}
 .site-header.is-menu-open nav{opacity:1;visibility:visible;pointer-events:auto;transform:translateY(0)}
 .site-header nav a,.site-header nav a[href="./researcher/"]{display:block!important;padding:12px!important;border:0!important;border-radius:10px!important;background:transparent!important;font-size:15px!important}
 .site-header nav a[aria-current]{background:rgba(33,142,255,.1)!important}
 .site-header nav a::after{left:12px;right:12px;bottom:6px}
 .site-header .demo,.current-site-header .demo{margin-left:8px;padding:10px 12px;font-size:13px}
}
@media(prefers-reduced-motion:reduce){.site-header nav,.site-header .nav-menu-icon::after{transition:none!important}}