.header{
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
  background: rgba(11,13,18,.65);
  border-bottom: 1px solid rgba(255,255,255,.08);
  transition: transform .22s ease, background .22s ease;
}

.header.is-hidden{
  transform: translateY(-110%);
}

.header__inner{
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand{
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.brand__logo {
  height: 40px;
  width: auto;
  display: block;
   transition: transform .2s ease;
}

.brand__logo:hover {
  transform: scale(1.05);
}

.nav--desktop{
  display: flex;
  align-items: center;
  gap: 16px;
}
.nav__link{
  color: rgba(255,255,255,.80);
  padding: 10px 10px;
  border-radius: 10px;
  transition: background .18s ease, color .18s ease;
}
.nav__link:hover{
  background: rgba(255,255,255,.05);
  color: rgba(255,255,255,.95);
}
.nav__link.is-active{
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.10);
}

.menu-btn{
  display: none;
  width: 46px;
  height: 46px;

  border-radius: 14px;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.06);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);

  color: rgba(255,255,255,.92);
  cursor: pointer;

  position: relative;
  place-items: center;

  transition: transform .18s ease, background .18s ease, border-color .18s ease, box-shadow .18s ease;
  box-shadow:
    0 0 0 1px rgba(255,255,255,.04) inset,
    0 10px 24px rgba(0,0,0,.25);
}

.menu-btn:hover{
  background: rgba(255,255,255,.10);
  border-color: rgba(255,255,255,.16);
  transform: translateY(-1px);
}

.menu-btn:active{
  transform: translateY(0);
}

.menu-btn:focus-visible{
  outline: none;
  box-shadow:
    0 0 0 3px rgba(59, 130, 246, .45),
    0 0 0 1px rgba(255,255,255,.06) inset,
    0 10px 24px rgba(0,0,0,.25);
}

.menu-btn__icon{
  position: absolute;
  transition: transform .2s ease, opacity .2s ease;
}

/* por padrão: mostra menu, esconde close */
.menu-btn__icon--close{
  opacity: 0;
  transform: scale(.92) rotate(-90deg);
}

/* quando menu estiver aberto (vocês já usam body.is-menu-open) */
body.is-menu-open .menu-btn{
  background: rgba(255,255,255,.12);
  border-color: rgba(255,255,255,.20);
}

body.is-menu-open .menu-btn__icon--menu{
  opacity: 0;
  transform: scale(.92) rotate(90deg);
}

body.is-menu-open .menu-btn__icon--close{
  opacity: 1;
  transform: scale(1) rotate(0);
}

.menu-btn__bar{
  display: block;
  height: 2px;
  margin: 6px 10px;
  background: rgba(255,255,255,.88);
  border-radius: 4px;
}

@media (max-width: 900px){
  .nav--desktop{ display: none; }
  .menu-btn{ display: inline-flex; flex-direction: column; justify-content: center; }
}