.ci-header{
  position:sticky;
  top:0;
  z-index:50;
  background:var(--color-surface-default);
  border-bottom:1px solid var(--color-border-mineral);
}

.ci-header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  min-height:72px;
  gap:var(--space-3);
}

.ci-brand{
  display:flex;
  align-items:center;
  gap:0.75rem;
  flex-shrink:0;
}

.ci-logo{
  height:48px;
  width:auto;
}

.ci-brand-text{
  font-family:var(--font-heading);
  font-size:1.4rem;
}

.ci-nav ul{
  list-style:none !important;
  margin:0;
  padding:0;
  display:flex;
  gap:var(--space-4);
}

.ci-nav a{
  font-size:var(--fs-6);
  letter-spacing:0.05em;
  text-transform:lowercase;
}

.ci-nav-toggle{
  display:none;
  width:44px;
  height:44px;
  align-items:center;
  justify-content:center;
}

.nav-toggle{
  flex-direction:column;
  gap:5px;
}

.ci-nav-toggle span{
  width:22px;
  height:2px;
  background:var(--color-text-primary);
}

@media (max-width:900px){
  .ci-logo{height:36px;}
  .ci-brand-text{font-size:1.1rem;}

  .ci-nav{
    position:fixed;
    inset:72px 0 auto 0;
    background:var(--color-surface-default);
    padding:var(--space-4);
    transform:translateY(-120%);
    transition:transform .25s ease;
  }

  .ci-nav ul{
    flex-direction:column;
    gap:var(--space-3);
  }

  .ci-nav[data-open="true"]{
    transform:translateY(0);
  }

  .ci-nav-toggle{display:flex;}
}