:root{--shell-max:1100px;--shell-h:62px;--shell-pad:14px}.st-shell-header{position:sticky;top:0;z-index:5200;overflow:visible;background:color-mix(in srgb,var(--panel)84%,rgba(0,0,0,.22));border-bottom:1px solid var(--panel-border);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px)}.st-shell-inner{max-width:var(--shell-max);margin:0 auto;padding:10px var(--shell-pad);display:flex;align-items:center;justify-content:space-between;gap:12px}.st-shell-brand{display:flex;align-items:center;gap:10px;min-width:160px}.st-shell-brand:hover{text-decoration:none !important;opacity:1}.st-shell-logo{width:34px;height:34px;border-radius:12px;border:1px solid rgba(255,255,255,.14);background:radial-gradient(18px 18px at 35% 30%,rgba(var(--accent-rgb),.32),rgba(255,255,255,.08));display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-sm);overflow:hidden}.st-shell-logo img{width:100%;height:100%;object-fit:cover}.st-shell-title{font-weight:1000;letter-spacing:var(--tracking-h);line-height:1.1}.st-shell-sub{margin-top:2px;font-size:12px;color:var(--muted);font-weight:800}.st-shell-nav{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.st-shell-link{display:inline-flex;align-items:center;gap:8px;padding:9px 11px;border-radius:999px;border:1px solid var(--panel-border);background:color-mix(in srgb,var(--panel-2)88%,transparent);color:var(--text);font-weight:950;font-size:12px;transition:transform .13s cubic-bezier(.2,.9,.2,1),filter .13s ease,border-color .13s ease,background .13s ease}.st-shell-link:hover{transform:translateY(-1px);filter:brightness(1.06);border-color:rgba(var(--accent-rgb),.26)}.st-shell-link:active{transform:translateY(0)scale(.99)}.st-shell-dd{position:relative}.st-shell-dd>.st-shell-link::after{content:"▾";font-size:11px;opacity:.75}.st-shell-menu{position:absolute;top:calc(100%+10px);left:0;min-width:240px;padding:10px;border-radius:18px;border:1px solid var(--panel-border-2);background:color-mix(in srgb,var(--panel)92%,rgba(0,0,0,.18));backdrop-filter:blur(16px);box-shadow:var(--shadow-lg);display:none}.st-shell-menu a{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 12px;border-radius:14px;border:1px solid transparent;color:var(--text);font-weight:950;font-size:12px}.st-shell-menu a:hover{border-color:rgba(var(--accent-rgb),.22);background:color-mix(in srgb,var(--panel-2)92%,transparent)}.st-shell-menu .hint{font-weight:800;color:var(--muted);font-size:11px}.st-shell-actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.st-shell-btn{appearance:none;border:1px solid rgba(var(--accent-rgb),.18);background:linear-gradient(135deg,rgba(var(--accent-rgb),.14),color-mix(in srgb,var(--panel)86%,transparent));color:var(--text);font-weight:1000;font-size:12px;padding:10px 12px;border-radius:14px;cursor:pointer;box-shadow:var(--shadow-sm);transition:transform .13s cubic-bezier(.2,.9,.2,1),filter .13s ease,border-color .13s ease,background .13s ease}.st-shell-btn:hover{transform:translateY(-1px);filter:brightness(1.06);border-color:rgba(var(--accent-rgb),.36)}.st-shell-btn:active{transform:translateY(0)scale(.99)}.st-shell-btn.ghost{border-color:var(--panel-border);background:color-mix(in srgb,var(--panel-2)92%,transparent);color:var(--text-2)}.st-shell-footer{margin-top:34px;padding:26px var(--shell-pad)40px;border-top:1px solid var(--panel-border);background:color-mix(in srgb,var(--panel)78%,transparent)}.st-shell-footer-inner{max-width:var(--shell-max);margin:0 auto;display:flex;flex-wrap:wrap;gap:18px;align-items:flex-start;justify-content:space-between}.st-shell-footer h4{margin:0 8px;font-size:13px;font-weight:1000;letter-spacing:var(--tracking-h)}.st-shell-footer p{margin:0;font-size:12px;color:var(--muted);font-weight:800;line-height:1.55}.st-shell-foot-links{display:flex;flex-wrap:wrap;gap:8px}.st-shell-foot-links a{padding:8px 10px;border-radius:999px;border:1px solid var(--panel-border);background:color-mix(in srgb,var(--panel-2)88%,transparent);font-size:12px;font-weight:900}body.st-shell-on .header,body.st-shell-on .topbar,body.st-shell-on .logo-link,body.st-shell-on .logoLink{}body.st-shell-on>.header{display:none !important}body.st-shell-on>.topbar{display:none !important}@media(max-width:860px){.st-shell-sub{display:none}.st-shell-nav{display:none}}.st-shell-center{display:flex;align-items:center;justify-content:center;gap:10px;flex:1;min-width:0;overflow:visible;position:relative;isolation:isolate}.st-shell-nav{flex-wrap:nowrap}.st-shell-search{display:inline-flex;align-items:center;gap:10px;padding:9px 12px;border-radius:999px;border:1px solid rgba(255,255,255,.12);background:color-mix(in srgb,rgba(255,255,255,.07)70%,transparent);box-shadow:0 10px 30px rgba(0,0,0,.28);text-decoration:none;min-width:280px;max-width:360px;flex:0 1 360px}.st-shell-search:hover{filter:brightness(1.05);border-color:rgba(var(--accent-rgb),.24)}.st-shell-search:active{transform:scale(.99)}.st-shell-search .g{width:18px;height:18px;border-radius:999px;background:conic-gradient(from 225deg,#4285F4,#34A853,#FBBC05,#EA4335,#4285F4);box-shadow:0 6px 16px rgba(0,0,0,.26);flex:0 18px}.st-shell-search .q{font-weight:950;font-size:12px;color:rgba(244,246,255,.86);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0}.st-shell-search .hint{margin-left:auto;font-size:11px;font-weight:900;color:rgba(244,246,255,.62);border:1px solid rgba(255,255,255,.10);background:rgba(0,0,0,.18);padding:6px 10px;border-radius:999px}.st-shell-dd{position:relative}.st-shell-dd.open{z-index:9200}.st-shell-menu{z-index:9100}.st-shell-dd.open .st-shell-menu{display:block}.st-shell-menu-close{width:100%;display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 12px;border-radius:14px;border:1px solid rgba(255,255,255,.10);background:rgba(0,0,0,.10);color:var(--text);font-weight:1000;cursor:pointer}.st-shell-menu-close:hover{border-color:rgba(var(--accent-rgb),.22);filter:brightness(1.05)}.st-shell-menu-close:active{transform:scale(.99)}.st-shell-menu-close .x{opacity:.75;font-weight:1000}body.st-shell-on .st-shell-mega-grid .st-shell-menu-close{grid-column:1 / -1}:root[data-perf="low"].st-shell-header{backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}.st-shell-dd::after{content:"";position:absolute;left:0;right:0;top:100%;height:8px}.st-shell-menu.st-shell-mega-grid{left:50%;transform:translateX(-50%);width:min(720px,calc(100vw - 24px));max-width:calc(100vw - 24px)}@media(max-width:1060px){.st-shell-search{display:none}}
/* v72: header dropdown group styling */
.st-shell-menu-group{display:flex;flex-direction:column;gap:8px;padding:2px 2px;min-width:0}
.st-shell-menu-title{font-size:11px;font-weight:1000;letter-spacing:-.2px;color:rgba(0,0,0,.55);padding:2px 6px;margin:2px 0 2px;border-radius:10px}
@media (prefers-color-scheme: dark){
  .st-shell-menu-title{color:rgba(255,255,255,.62)}
}