/* BCOTN institutional header — layout only; the existing identity remains untouched. */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  width:100%;
  height:246px;
  overflow:visible;
  background:#1b1a32;
  color:var(--lav);
  border-bottom:1px solid rgba(230,220,235,.16);
  box-shadow:none;
  transition:height .38s cubic-bezier(.22,.61,.36,1),box-shadow .38s ease;
}
.header-shell{
  position:relative;
  width:100%;
  height:100%;
  display:grid;
  grid-template-rows:38px 142px 66px;
  transition:grid-template-rows .38s cubic-bezier(.22,.61,.36,1);
}
.header-top{
  position:relative;
  width:100%;
  max-width:1320px;
  margin:0 auto;
  padding:0 32px;
}
.header-actions{
  position:absolute;
  top:0;
  right:32px;
  height:38px;
  display:flex;
  align-items:center;
  gap:0;
  font:700 12px/1 var(--body);
  letter-spacing:.035em;
  text-transform:uppercase;
}
.header-support{
  display:flex!important;
  align-items:center;
  min-height:38px;
  margin:0!important;
  padding:0 16px 0 0!important;
  border:0!important;
  border-radius:0!important;
  background:transparent!important;
  color:var(--lav)!important;
  font:700 12px/1 var(--body)!important;
  letter-spacing:.035em;
}
.header-support:hover,.header-support:focus-visible{color:var(--cyan)!important}
.language-mount{
  position:relative;
  display:flex;
  align-items:center;
  min-height:38px;
  padding-left:16px;
}
.language-mount:before{
  content:"";
  position:absolute;
  left:0;
  top:11px;
  width:1px;
  height:16px;
  background:rgba(230,220,235,.28);
}
.language{position:relative!important;right:auto!important;top:auto!important;bottom:auto!important;margin:0!important;transform:none!important}
.lang-toggle{
  width:auto!important;
  height:38px!important;
  padding:0!important;
  border:0!important;
  border-radius:0!important;
  background:transparent!important;
  color:var(--lav)!important;
  font:800 12px/1 var(--body)!important;
  letter-spacing:.035em!important;
}
.lang-toggle:after{content:"⌄";display:inline-block;margin-left:6px;font-size:10px;opacity:.72;transform:translateY(-1px)}
.lang-toggle:hover,.lang-toggle:focus-visible{color:var(--cyan)!important}
.lang-menu{
  top:36px!important;
  right:0!important;
  min-width:70px!important;
  padding:5px!important;
  border:1px solid rgba(230,220,235,.2)!important;
  border-radius:0!important;
  background:#1b1a32!important;
  box-shadow:0 14px 30px rgba(0,0,0,.24)!important;
}
.header-identity{position:relative;display:flex;align-items:center;justify-content:center;min-width:0}
.brand{
  position:relative!important;
  left:auto!important;
  top:auto!important;
  width:460px!important;
  min-width:0!important;
  max-width:calc(100vw - 64px)!important;
  margin:0!important;
  padding:0!important;
  display:flex!important;
  flex-direction:column!important;
  align-items:center!important;
  justify-content:center!important;
  gap:0!important;
  transform:none!important;
}
.brand img{
  width:100%!important;
  height:auto!important;
  max-height:none!important;
  object-fit:contain!important;
  object-position:center!important;
  mix-blend-mode:normal!important;
}
.brand:after{
  width:100%!important;
  max-width:none!important;
  margin:7px 0 0!important;
  color:var(--cyan)!important;
  font:700 9px/1.15 var(--body)!important;
  letter-spacing:.018em!important;
  text-align:justify!important;
  text-align-last:justify!important;
  text-transform:uppercase!important;
  white-space:nowrap!important;
}
.links{
  width:min(78vw,920px);
  height:100%;
  margin:0 auto;
  display:grid!important;
  grid-template-columns:repeat(4,1fr);
  align-items:start;
  gap:clamp(22px,4vw,62px)!important;
  padding:15px 0 26px;
}
.links a{
  position:relative!important;
  left:auto!important;
  right:auto!important;
  top:auto!important;
  margin:0!important;
  transform:none!important;
  display:block;
  color:var(--lav);
  font:800 12px/1.2 var(--body)!important;
  letter-spacing:.045em!important;
  text-align:center;
  text-transform:uppercase;
  white-space:nowrap;
}
.links a:after{content:"";position:absolute;left:50%;right:50%;bottom:-8px;height:1px;background:var(--cyan);transition:left .2s ease,right .2s ease}
.links a:hover,.links a:focus-visible,.links a[aria-current="page"]{color:var(--cyan)}
.links a:hover:after,.links a:focus-visible:after,.links a[aria-current="page"]:after{left:22%;right:22%}
.menu-button{display:none!important}

/* Compact desktop state after scrolling. */
@media(min-width:901px){
  .site-header.is-compact{height:90px;box-shadow:0 10px 34px rgba(12,11,32,.14)}
  .site-header.is-compact .header-shell{grid-template:90px / 250px minmax(460px,1fr) 180px;align-items:center;padding:0 28px}
  .site-header.is-compact .header-top{grid-column:3;grid-row:1;width:100%;height:90px;padding:0}
  .site-header.is-compact .header-actions{right:0;top:26px;height:38px}
  .site-header.is-compact .header-identity{grid-column:1;grid-row:1;justify-content:flex-start}
  .site-header.is-compact .brand{width:230px!important;max-width:230px!important}
  .site-header.is-compact .brand:after{display:none!important}
  .site-header.is-compact .links{grid-column:2;grid-row:1;width:min(100%,650px);padding:0;align-items:center;gap:clamp(14px,2.2vw,36px)!important}
  .site-header.is-compact .links a{font-size:11px!important}
}

/* Mobile and tablet: a compact bar plus a full-screen navigation panel. */
@media(max-width:900px){
  .site-header,.site-header.is-compact{height:84px;transition:none}
  .header-shell,.site-header.is-compact .header-shell{display:block;padding:0;grid-template:none}
  .header-top,.site-header.is-compact .header-top{position:absolute;inset:0;width:100%;height:84px;max-width:none;padding:0;pointer-events:none}
  .header-actions,.site-header.is-compact .header-actions{position:absolute;top:0;right:14px;height:84px;pointer-events:auto}
  .header-support{display:none!important}
  .language-mount{height:84px;min-height:84px;padding:0}
  .language-mount:before{display:none}
  .lang-toggle{min-width:44px!important;height:44px!important;font-size:11px!important}
  .lang-menu{top:62px!important}
  .header-identity,.site-header.is-compact .header-identity{position:relative;width:100%;height:84px;display:flex;align-items:center;justify-content:center}
  .brand,.site-header.is-compact .brand{width:min(300px,calc(100vw - 142px))!important;max-width:none!important}
  .brand:after{display:none!important}
  .links,.site-header.is-compact .links{display:none!important}
  .menu-button{
    position:absolute;
    left:14px;
    top:20px;
    z-index:2;
    width:44px;
    height:44px;
    margin:0;
    padding:0;
    display:flex!important;
    flex-direction:column;
    align-items:center;
    justify-content:center;
    gap:5px;
    border:0!important;
    background:transparent!important;
    color:var(--lav);
  }
  .menu-button span{display:block;width:22px;height:1px;background:currentColor;transition:transform .24s ease,opacity .18s ease}
  .menu-button[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
  .menu-button[aria-expanded="true"] span:nth-child(2){opacity:0}
  .menu-button[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
  .mobile-panel{
    position:fixed!important;
    inset:84px 0 0!important;
    z-index:99!important;
    display:flex!important;
    min-height:calc(100dvh - 84px)!important;
    padding:clamp(34px,8vh,78px) 28px 32px!important;
    flex-direction:column!important;
    justify-content:center!important;
    gap:0!important;
    overflow-y:auto!important;
    background:#1b1a32!important;
    color:var(--lav)!important;
    border-top:1px solid rgba(230,220,235,.14)!important;
    opacity:0;
    visibility:hidden;
    transform:translateY(-12px);
    pointer-events:none;
    transition:opacity .24s ease,transform .3s cubic-bezier(.22,.61,.36,1),visibility 0s linear .3s;
  }
  .mobile-panel.open{opacity:1;visibility:visible;transform:none;pointer-events:auto;transition-delay:0s}
  .mobile-panel a{
    width:min(100%,620px);
    margin:0 auto;
    padding:15px 2px!important;
    border-bottom:1px solid rgba(230,220,235,.14)!important;
    color:var(--lav);
    font:500 clamp(28px,8vw,48px)/1.05 var(--display)!important;
    letter-spacing:-.025em!important;
    text-transform:none!important;
  }
  .mobile-panel a:hover,.mobile-panel a:focus-visible,.mobile-panel a[aria-current="page"]{color:var(--cyan)}
  .mobile-panel .mobile-support{margin-top:20px;padding-top:20px!important;border-top:0!important;border-bottom:0!important;color:var(--cyan);font:800 12px/1.2 var(--body)!important;letter-spacing:.065em!important;text-transform:uppercase!important}
  body.menu-open{overflow:hidden}
}

@media(max-width:370px){
  .header-actions{right:8px}
  .menu-button{left:8px}
  .brand,.site-header.is-compact .brand{width:calc(100vw - 132px)!important}
  .mobile-panel{padding-left:20px!important;padding-right:20px!important}
}

@media(prefers-reduced-motion:reduce){
  .site-header,.header-shell,.links a:after,.menu-button span,.mobile-panel{transition:none!important}
}