/* Floating OBF navigation — complete reset of legacy header geometry. */
#site-header{position:fixed!important;top:18px!important;left:50%!important;right:auto!important;transform:translateX(-50%)!important;width:min(1180px,calc(100vw - 36px))!important;max-width:1180px!important;min-height:66px!important;margin:0!important;padding:8px 9px 8px 12px!important;display:flex!important;align-items:center!important;justify-content:space-between!important;gap:16px!important;border:1px solid rgba(255,255,255,.16)!important;border-radius:999px!important;background:rgba(5,5,5,.88)!important;color:#fff!important;box-shadow:0 18px 55px rgba(0,0,0,.24)!important;backdrop-filter:blur(22px) saturate(130%)!important;-webkit-backdrop-filter:blur(22px) saturate(130%)!important;overflow:visible!important;z-index:100!important}
#site-header .brand{display:flex!important;align-items:center!important;gap:10px!important;min-width:max-content!important;color:#fff!important;padding-right:8px!important}
#site-header .brand img{width:44px!important;height:44px!important;border-radius:50%!important;object-fit:cover!important;border:1px solid #333!important;background:#000!important}
#site-header .brand b{display:block!important;font:700 11px/1 'IBM Plex Mono',monospace!important;letter-spacing:.04em!important;white-space:nowrap!important}
#site-header .brand em{color:#929292!important}
#site-header nav{display:flex!important;align-items:center!important;justify-content:center!important;gap:2px!important;padding:4px!important;border:1px solid #2b2b2b!important;border-radius:999px!important;background:#111!important}
#site-header nav a{display:block!important;color:#bdbdbd!important;padding:11px 14px!important;border-radius:999px!important;font:600 9px/1 'IBM Plex Mono',monospace!important;letter-spacing:.08em!important;text-transform:uppercase!important;white-space:nowrap!important;transition:background .2s,color .2s,transform .2s!important}
#site-header nav a:hover,#site-header nav a:focus-visible{background:#fff!important;color:#000!important;transform:translateY(-1px)!important;outline:none!important}
#site-header .nav-actions{display:flex!important;align-items:center!important;gap:6px!important;min-width:max-content!important}
#site-header .nav-actions .pill{display:inline-flex!important;align-items:center!important;justify-content:center!important;min-height:44px!important;padding:0 19px!important;border:1px solid #fff!important;border-radius:999px!important;background:#fff!important;color:#000!important;font:700 9px/1 'IBM Plex Mono',monospace!important;letter-spacing:.09em!important;text-transform:uppercase!important}
#site-header #menu{display:none!important}
body{padding-top:0!important}
@media(max-width:880px){#site-header{top:10px!important;width:calc(100vw - 20px)!important;min-height:58px!important;padding:6px 7px!important;gap:6px!important}#site-header .brand img{width:42px!important;height:42px!important}#site-header .brand b{display:none!important}#site-header nav{gap:0!important;min-width:0!important;overflow:hidden!important}#site-header nav a{padding:10px 11px!important}#site-header nav a:nth-child(4),#site-header nav a:nth-child(5){display:none!important}#site-header .nav-actions .pill{min-height:42px!important;padding:0 13px!important}}
@media(max-width:540px){#site-header{justify-content:flex-start!important}#site-header .brand{padding:0!important}#site-header nav{flex:1!important;justify-content:center!important}#site-header nav a{padding:9px 8px!important;font-size:8px!important}#site-header nav a:nth-child(3){display:none!important}#site-header .nav-actions .pill{width:42px!important;padding:0!important;font-size:0!important}#site-header .nav-actions .pill:after{content:'↗';font-size:15px!important}.model-mast,.obf-stage,.field-index,.field-note,.docs-shell,.obf-section{padding-top:115px!important}}
@media(prefers-reduced-motion:reduce){#site-header nav a{transition:none!important}}