/* =========================================================
   navigasi.css — Modul 5 & 6 (CSS Navigasi dan Layout)
   Menerapkan: navbar horizontal, dropdown bertingkat,
   efek gradient, border-radius, dan transisi hover.
   ========================================================= */

header{
  position:sticky;
  top:37px; /* menempel tepat di bawah #browser-frame */
  z-index:40;
}

#menu,
#menu li,
#menu ul,
#menu a{
  margin:0;
  padding:0;
  border:none;
  outline:none;
}

#menu{
  display:flex;
  justify-content:center;
  height:48px;
  background:var(--navy);
  background:linear-gradient(180deg, var(--navy) 0%, var(--navy-deep) 100%);
}

#menu > ul{
  display:flex;
  height:100%;
}

#menu li{
  position:relative;
  list-style:none;
  height:100%;
}

#menu li > a{
  display:flex;
  align-items:center;
  height:100%;
  padding:0 22px;
  font-family:var(--mono);
  font-size:0.85rem;
  color:#e8ecf3;
  text-shadow:1px 1px 1px rgba(0,0,0,.4);
  transition:color .2s ease-in-out, background .2s ease-in-out;
}

#menu li:hover > a{
  color:#0e1729;
  background:linear-gradient(180deg, var(--green-light) 0%, var(--green-dark) 100%);
}

/* ---- Dropdown (Modul 6) ---- */
#menu ul ul{
  position:absolute;
  top:48px;
  left:0;
  min-width:190px;
  background:var(--paper);
  border:1px solid #e4ddcd;
  border-radius:0 0 6px 6px;
  box-shadow:0 10px 24px rgba(0,0,0,.15);
  opacity:0;
  visibility:hidden;
  transform:translateY(-6px);
  transition:opacity .2s ease .05s, transform .2s ease .05s, visibility .2s ease .05s;
}

#menu li:hover > ul{
  opacity:1;
  visibility:visible;
  transform:translateY(0);
}

#menu ul ul li{ height:auto; }

#menu ul ul li a{
  display:block;
  height:auto;
  padding:10px 18px;
  color:var(--navy);
  text-shadow:none;
  border-bottom:1px solid #efe9db;
}

#menu ul ul li:last-child a{ border-bottom:none; }

#menu ul ul li a:hover{
  background:#eef7e0;
  color:var(--green-dark);
}