/* ============================================================================
   HEADER + NAV + MEGA MENU
   ============================================================================ */
.site-head{position:sticky;top:0;z-index:100;padding:16px 0;transition:padding .3s ease}
.site-head.scrolled{padding:10px 0}
.site-head .bar{display:flex;align-items:center;gap:16px;padding:0 10px 0 22px;height:70px;
  background:rgba(255,255,255,.78);backdrop-filter:blur(16px) saturate(1.2);-webkit-backdrop-filter:blur(16px) saturate(1.2);
  border:1px solid rgba(255,255,255,.9);border-radius:var(--r-full);box-shadow:var(--shadow-sm);transition:box-shadow .3s,height .3s}
.site-head.scrolled .bar{height:62px;box-shadow:var(--shadow)}

.nav{flex:1;display:flex;justify-content:center}
.nav-list{display:flex;gap:2px;list-style:none;align-items:center}
.nav-list > li > a{display:flex;align-items:center;gap:5px;padding:9px 15px;border-radius:11px;font-weight:600;
  font-size:14.5px;color:#2C3446;transition:.16s}
.nav-list > li > a:hover{color:var(--blue);background:rgba(22,104,251,.07)}
.chev{font-size:9px;opacity:.6;transition:transform .2s}
.has-mega:hover .chev{transform:rotate(180deg)}

/* mega menu */
.has-mega{position:relative}
.mega{position:absolute;top:calc(100% + 14px);left:50%;transform:translateX(-50%) translateY(8px);
  display:grid;grid-template-columns:repeat(4,minmax(150px,1fr));gap:8px;padding:20px;
  background:rgba(255,255,255,.98);backdrop-filter:blur(20px);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--shadow-lg);opacity:0;visibility:hidden;pointer-events:none;transition:opacity .22s,transform .22s var(--ease),visibility .22s;min-width:640px;z-index:120}
/* invisible bridge so moving the cursor into the menu doesn't drop the hover */
.mega::before{content:"";position:absolute;top:-16px;left:0;right:0;height:16px}
.has-mega:hover .mega,
.has-mega.open .mega{opacity:1;visibility:visible;pointer-events:auto;transform:translateX(-50%) translateY(0)}
.mega-col{display:flex;flex-direction:column;gap:2px}
.mega-h{font-family:var(--font-b);font-size:11px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;
  color:var(--muted-2);padding:6px 12px 8px}
.mega-col a{padding:9px 12px;border-radius:10px;font-size:14px;font-weight:500;color:var(--ink-2);transition:.15s}
.mega-col a:hover{background:var(--surface-2);color:var(--blue);transform:translateX(3px)}

.head-cta{flex:0 0 auto;display:flex;align-items:center;gap:8px}
.nav-toggle{display:none;width:44px;height:44px;border-radius:12px;border:1.5px solid var(--line);background:#fff;
  font-size:19px;align-items:center;justify-content:center;flex:0 0 auto}

@media(max-width:1080px){
  .nav{position:absolute;top:calc(100% + 12px);left:0;right:0;display:none;padding:0 4%}
  .nav.open{display:block}
  .nav-list{flex-direction:column;align-items:stretch;background:#fff;border:1px solid var(--line);
    border-radius:20px;padding:14px;box-shadow:var(--shadow);gap:2px;max-height:calc(100dvh - 130px);overflow-y:auto}
  .nav-list > li > a{padding:14px 16px;justify-content:space-between}
  .mega{position:static;opacity:1;visibility:visible;pointer-events:auto;transform:none;box-shadow:none;
    border:none;background:transparent;min-width:0;grid-template-columns:1fr;padding:4px 8px 8px;gap:4px}
  .mega-h{padding:10px 12px 4px}
  .nav-toggle{display:flex}
  .head-cta .btn:not(.nav-toggle){display:none}
}