/* =====================================================================
   BN Analytics — GLOBAL HEADER + FOOTER CSS  (global-header-footer.css)
   Shared by every page. Edit here ONCE; all pages update.
   Contains: design tokens, base reset, loader, header, mobile menu, buttons, footer.
   Page-specific CSS stays inside each page.
   ===================================================================== */
:root{
  --bg:#080b12; --bg-2:#0d121c; --surface:#111826; --surface-2:#172033;
  --line:rgba(255,255,255,.09); --line-2:rgba(255,255,255,.18);
  --text:#f4f6fb; --text-2:#b4bfd3; --text-3:#8e9bb3;
  --brand:#0050ff; --brand-2:#003ecc; --brand-text:#7aa5ff;
  --gold:#ffd24a; --up:#34d399; --down:#f87171; --warn:#fbbf24;
  --r-sm:10px; --r:14px; --r-lg:20px;
  --shadow:0 18px 50px rgba(0,0,0,.45);
  --font:'Inter','Segoe UI',system-ui,-apple-system,Roboto,Arial,sans-serif;
  --fs-xs:.8125rem; --fs-sm:.9375rem; --fs-md:1rem; --fs-lg:1.125rem;
  --fs-h3:1.25rem; --fs-h2:clamp(1.75rem,3.2vw,2.5rem); --fs-h1:clamp(2.25rem,5.4vw,4rem);
  --sec:clamp(64px,9vw,112px);
}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.6;font-size:var(--fs-md);overflow-x:hidden;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
button{font:inherit;color:inherit;cursor:pointer}
:focus-visible{outline:3px solid var(--gold);outline-offset:3px;border-radius:6px}
.skip{position:absolute;left:-999px;top:8px;background:var(--gold);color:#000;padding:10px 16px;border-radius:8px;z-index:9999;font-weight:700}
.skip:focus{left:8px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* CSS-only page loader: fades out by itself, never blocks taps */
body::before{content:"";position:fixed;inset:0;background:var(--bg);z-index:99999;pointer-events:none;animation:bnfade .4s ease .5s forwards}
body::after{content:"";position:fixed;top:50%;left:50%;width:44px;height:44px;margin:-22px 0 0 -22px;border:4px solid rgba(255,255,255,.12);border-top-color:var(--brand);border-radius:50%;z-index:100000;pointer-events:none;animation:bnspin 1s linear infinite,bnfade .4s ease .5s forwards}
@keyframes bnspin{to{transform:rotate(360deg)}}
@keyframes bnfade{to{opacity:0;visibility:hidden}}
#bn-header:empty{display:block;min-height:68px}

/* ===== HEADER ===== */
.top{position:sticky;top:0;z-index:100;background:rgba(8,11,18,.86);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav-row{display:flex;align-items:center;justify-content:space-between;height:68px;gap:24px;position:relative;z-index:5}
.logo{font-weight:800;font-size:1.35rem;letter-spacing:-.02em}
.logo span{color:#3373ff}
#networkCanvas{position:fixed;inset:0;z-index:-1;opacity:.2;pointer-events:none}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-links>li>a,.nav-links .dd-btn{display:flex;align-items:center;gap:6px;padding:10px 14px;border-radius:var(--r-sm);font-size:var(--fs-sm);font-weight:500;color:var(--text-2);background:none;border:0;transition:color .2s,background .2s}
.nav-links>li>a:hover,.nav-links .dd-btn:hover{color:var(--text);background:rgba(255,255,255,.05)}
.dd{position:relative}
.dd-menu{position:absolute;top:100%;left:0;z-index:200;min-width:200px;padding:8px;background:var(--surface);border:1px solid var(--line-2);border-radius:var(--r);box-shadow:var(--shadow);display:none}
.dd:hover .dd-menu,.dd:focus-within .dd-menu,.dd.open .dd-menu{display:block}
.dd-menu a{display:block;padding:10px 12px;border-radius:8px;font-size:var(--fs-sm);color:var(--text-2)}
.dd-menu a:hover{background:rgba(0,80,255,.18);color:var(--text)}
.nav-cta{margin-left:6px}
.nav-overlay{display:none}
.menu-btn{display:none;background:none;border:1px solid var(--line-2);border-radius:10px;width:44px;height:44px;align-items:center;justify-content:center}

/* ===== BUTTONS ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 24px;border-radius:12px;font-weight:600;font-size:var(--fs-sm);border:1px solid transparent;transition:transform .2s,box-shadow .2s,background .2s;min-height:46px;text-align:center}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 24px rgba(0,80,255,.32)}
.btn-primary:hover{background:var(--brand-2);transform:translateY(-2px);box-shadow:0 12px 30px rgba(0,80,255,.45)}
.btn-ghost{background:transparent;border-color:var(--line-2);color:var(--text)}
.btn-ghost:hover{background:rgba(255,255,255,.06);transform:translateY(-2px)}
.btn-sm{padding:9px 18px;min-height:40px}
.btn-lg{padding:16px 32px;font-size:var(--fs-md)}

/* ===== FOOTER ===== */
footer{background:#05070c;border-top:1px solid var(--line);padding:64px 0 28px}
.f-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;margin-bottom:44px}
.f-brand p{color:var(--text-2);font-size:var(--fs-sm);max-width:320px;margin:14px 0 20px}
.social{display:flex;gap:10px}
.social a{width:42px;height:42px;border-radius:10px;border:1px solid var(--line-2);display:grid;place-items:center;color:var(--text-2);transition:all .2s}
.social a:hover{color:#fff;background:var(--brand);border-color:var(--brand)}
.social svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.f-col h4{font-size:var(--fs-xs);letter-spacing:.12em;text-transform:uppercase;color:var(--text);margin-bottom:16px}
.f-col li{margin-bottom:10px}
.f-col a{color:var(--text-2);font-size:var(--fs-sm)}
.f-col a:hover{color:var(--text);text-decoration:underline}
.legal{border:1px solid var(--line);border-left:3px solid var(--brand);background:rgba(255,255,255,.03);border-radius:var(--r);padding:24px 28px;margin-bottom:28px;font-size:var(--fs-sm);line-height:1.75;color:var(--text-2)}
.legal strong{color:var(--text);font-weight:600}
.f-bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:var(--fs-sm);color:var(--text-3);padding-top:24px;border-top:1px solid var(--line)}
.f-bottom nav{display:flex;gap:22px}
.f-bottom a:hover{color:var(--text)}

.is-auth .nav-cta{display:none}
@media (min-width:821px){
  .is-auth .nav-links>li>a#authLink{background:var(--brand);color:#fff;padding:9px 20px;border-radius:12px;font-weight:600;box-shadow:0 8px 24px rgba(0,80,255,.32)}
  .is-auth .nav-links>li>a#authLink:hover{background:var(--brand-2);color:#fff}
}
/* active page */
.nav-links>li>a[aria-current="page"],.nav-links .dd-btn.is-active,.dd-menu a[aria-current="page"]{color:var(--text)}
.nav-links>li>a[aria-current="page"]{background:rgba(255,255,255,.06)}

/* ===== BREAKPOINTS ===== */
@media (max-width:1024px){.f-grid{grid-template-columns:1fr 1fr}}
@media (max-width:820px){
  .nav-row{gap:0}
  .menu-btn{display:inline-flex;flex-direction:column;gap:5px;margin-left:auto;transition:background .2s,border-color .2s}
  .menu-btn:hover,.menu-btn[aria-expanded="true"]{background:rgba(255,255,255,.06);border-color:var(--line-2)}
  .menu-btn .mb{display:block;width:20px;height:2px;border-radius:2px;background:var(--text);transition:transform .28s ease,opacity .2s ease}
  .menu-btn[aria-expanded="true"] .mb:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .menu-btn[aria-expanded="true"] .mb:nth-child(2){opacity:0}
  .menu-btn[aria-expanded="true"] .mb:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .nav-links{position:absolute;top:100%;left:0;right:0;display:block;padding:0 24px;background:var(--bg);border-bottom:1px solid var(--line-2);box-shadow:0 24px 40px rgba(0,0,0,.5);max-height:0;overflow:hidden;visibility:hidden;transition:max-height .32s ease,visibility 0s linear .32s}
  .nav-links.open{max-height:calc(100vh - 80px);max-height:calc(100dvh - 80px);overflow-y:auto;visibility:visible;transition:max-height .32s ease,visibility 0s}
  .nav-links>li{border-bottom:1px solid var(--line)}
  .nav-links>li>a,.nav-links .dd-btn{display:flex;align-items:center;justify-content:space-between;width:100%;min-height:54px;padding:0 4px;border-radius:0;font-size:1.0625rem;font-weight:500;color:var(--text);text-align:left}
  .nav-links>li>a:hover,.nav-links .dd-btn:hover{background:none;color:var(--brand-text)}
  .dd-btn svg{transition:transform .25s ease}
  .dd.open .dd-btn svg{transform:rotate(180deg)}
  .dd-menu,.dd:hover .dd-menu,.dd:focus-within .dd-menu{position:static;display:block;min-width:0;max-height:0;overflow:hidden;padding:0 0 0 14px;border:0;border-radius:0;box-shadow:none;background:transparent;transition:max-height .28s ease}
  .dd.open .dd-menu{max-height:220px}
  .dd-menu a{display:flex;align-items:center;min-height:48px;padding:0 4px 0 14px;border-left:2px solid var(--line-2);border-radius:0;font-size:1rem;color:var(--text-2)}
  .dd-menu a:hover{background:none;color:var(--brand-text)}
  .nav-links>li.nav-cta{border:0;margin:0;padding:18px 0 24px}
  .nav-links>li.nav-cta>a.btn{width:100%;min-height:50px;justify-content:center;padding:0 24px;border-radius:12px;background:var(--brand);color:#fff;font-size:1rem;font-weight:600}
  .nav-links>li.nav-cta>a.btn:hover{background:var(--brand-2);color:#fff}
  .nav-overlay{display:block;position:fixed;inset:0;z-index:90;background:rgba(0,0,0,.6);opacity:0;visibility:hidden;transition:opacity .3s ease,visibility 0s linear .3s}
  body.menu-open{overflow:hidden}
  body.menu-open .nav-overlay{opacity:1;visibility:visible;transition:opacity .3s ease,visibility 0s}
  .is-auth .nav-links>li:has(>#authLink){border:0;padding:16px 0 24px}
  .is-auth .nav-links>li>a#authLink{justify-content:center;min-height:50px;border-radius:12px;background:var(--brand);color:#fff;font-weight:600}
}
@media (max-width:600px){.container{padding:0 18px}.f-grid{grid-template-columns:1fr}}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  body::before,body::after{display:none}
}