/* HEADER */

header{
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(11,15,26,.9);
  backdrop-filter: saturate(130%) blur(6px);
  border-bottom: none; /* was: 1px solid var(--border); */
}


.nav{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:70px;
}

.brand{
  display:flex;
  align-items:center;
  gap:12px;
  font-weight:800;
  letter-spacing:.2px;
}

.logo{
  width:34px;
  height:34px;
  display:grid;
  place-items:center;
  border-radius:8px;
  background:var(--card);
  color:var(--accent);
  font-weight:900;
  border:1px solid var(--border);
  box-shadow:inset 0 0 0 1px rgba(0,229,255,.25);
}

.menu{
  display:flex;
  gap:20px;
}

.menu a{
  color:var(--text);
  opacity:.9;
  text-decoration:none;
}

.menu a:hover{
  opacity:1;
}

/* Current page highlight – subtle underline, same style family */

.menu a[aria-current="page"],
.menu a.is-active{
  opacity:1;
  position:relative;
}

.menu a[aria-current="page"]::after,
.menu a.is-active::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:-4px;
  height:2px;
  border-radius:999px;
  background:linear-gradient(
    90deg,
    transparent,
    var(--accent),
    transparent
  );
}