/* Shared header + mobile tab bar. Trust-first blue; frosted glass only on navigation. */
:root{--st-blue:#1f5fe6;--st-blue-dark:#1747b5;--st-blue-50:#eef4ff;--st-navy:#0c1d42;--st-muted:#5c6a85;--st-line:#e2e8f3}
#site-nav{position:sticky;top:0;z-index:50;font-family:inherit}
#site-nav svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}
#site-nav .st-top{display:flex;align-items:center;gap:20px;padding:12px max(4vw,16px);background:rgba(255,255,255,.82);-webkit-backdrop-filter:saturate(170%) blur(14px);backdrop-filter:saturate(170%) blur(14px);border-bottom:1px solid rgba(12,29,66,.07)}
#site-nav .st-brand{display:flex;align-items:center;gap:10px;color:var(--st-navy);text-decoration:none;font-weight:700;font-size:22px;line-height:1.05;letter-spacing:-.3px;margin-right:auto}
#site-nav .st-brand small{display:block;font-size:11.5px;font-weight:400;color:var(--st-muted);margin-top:3px;letter-spacing:0}
#site-nav .st-mark{position:relative;display:grid;place-items:center;width:40px;height:40px;color:var(--st-blue)}
#site-nav .st-mark svg{width:40px;height:40px;fill:currentColor;stroke:none}
#site-nav .st-mark b{position:absolute;color:#fff;font-size:17px;font-weight:800;top:9px}
#site-nav .st-links{display:flex;align-items:center;gap:2px}
#site-nav .st-link{position:relative;display:flex;align-items:center;min-height:44px;padding:8px 12px;color:var(--st-muted);font-size:15px;text-decoration:none;white-space:nowrap}
#site-nav .st-link:hover{color:var(--st-blue)}
#site-nav .st-link[aria-current=page]{color:var(--st-blue);font-weight:600}
#site-nav .st-link[aria-current=page]::after{content:'';position:absolute;left:12px;right:12px;bottom:4px;height:2.5px;border-radius:2px;background:var(--st-blue)}
#site-nav .st-cta{display:flex;align-items:center;gap:8px;min-height:44px;padding:0 18px;border-radius:12px;background:var(--st-blue);color:#fff;font-size:15px;font-weight:600;text-decoration:none;box-shadow:0 6px 16px rgba(31,95,230,.25);white-space:nowrap}
#site-nav .st-cta:hover{background:var(--st-blue-dark)}
#site-nav .st-tabs{display:none}
#site-nav a:focus-visible{outline:3px solid #8fb0ff;outline-offset:2px;border-radius:10px}
@media(max-width:1080px){#site-nav .st-link{padding:8px 9px;font-size:14px}#site-nav .st-brand small{display:none}}
@media(max-width:900px){#site-nav .st-links{display:none}}
@media(max-width:760px){
 #site-nav .st-top{padding:10px 16px}
 #site-nav .st-brand{font-size:20px}
 #site-nav .st-cta{min-height:40px;padding:0 13px;font-size:14px}
 #site-nav .st-tabs{display:grid;grid-template-columns:repeat(5,1fr);position:fixed;left:0;right:0;bottom:0;padding:6px 6px calc(6px + env(safe-area-inset-bottom));background:rgba(255,255,255,.86);-webkit-backdrop-filter:saturate(170%) blur(16px);backdrop-filter:saturate(170%) blur(16px);border-top:1px solid rgba(12,29,66,.08);box-shadow:0 -6px 24px rgba(12,29,66,.06)}
 #site-nav .st-tab{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;min-height:54px;border-radius:12px;color:var(--st-muted);font-size:11px;text-decoration:none;text-align:center;line-height:1.2}
 #site-nav .st-tab svg{width:22px;height:22px}
 #site-nav .st-tab[aria-current=page]{color:var(--st-blue);font-weight:600}
 #site-nav .st-tab-cta svg{background:var(--st-blue);color:#fff;border-radius:11px;padding:6px;width:34px;height:34px;box-sizing:border-box;box-shadow:0 4px 12px rgba(31,95,230,.3)}
 body.st-has-nav{padding-bottom:calc(72px + env(safe-area-inset-bottom))}
}
@media(max-width:380px){#site-nav .st-cta span{display:none}}
@supports not ((backdrop-filter:blur(1px)) or (-webkit-backdrop-filter:blur(1px))){#site-nav .st-top,#site-nav .st-tabs{background:#fff}}
@media(prefers-reduced-transparency:reduce){#site-nav .st-top,#site-nav .st-tabs{background:#fff;backdrop-filter:none;-webkit-backdrop-filter:none}}