/* =========================================================
   NAVBAR — menu fixo no topo
   Logo, links, botão "Fale comigo", botões de idioma e tema
   e o menu do celular. JS: js/navbar.js
   ========================================================= */

nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 1.25rem 4rem;
  display: flex; justify-content: space-between; align-items: center;
  backdrop-filter: blur(16px);
  background: var(--nav-bg);
  border-bottom: 1px solid var(--border);
  /* opacity/transform: entrada depois da tela de carregamento */
  transition: opacity .35s var(--ease-out) .05s, transform .35s var(--ease-out) .05s, background .3s, border-color .3s;
}
.nav-logo {
  font-size: 1.2rem; font-weight: 800; letter-spacing: -0.02em;
  color: var(--cream); text-decoration: none; display: flex; align-items: center; gap: 2px;
}
.nav-logo span { color: var(--accent); }
.nav-links { display: flex; gap: 2.5rem; list-style: none; }
.nav-links a {
  color: var(--gray); text-decoration: none; font-size: 0.85rem;
  letter-spacing: 0.08em; text-transform: uppercase; font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--accent); }

.nav-right { display: flex; align-items: center; gap: 1rem; }

.nav-cta {
  background: var(--accent); color: #08090b; /* fixo para leitura sobre o laranja */
  padding: 0.65rem 1.5rem; border-radius: 2rem;
  font-size: 0.85rem; font-weight: 700; text-decoration: none;
  letter-spacing: 0.04em; transition: opacity 0.2s, transform 0.2s, box-shadow 0.2s;
}
.nav-cta:hover { opacity: 0.95; transform: translateY(-2px); box-shadow: 0 4px 20px var(--accent-glow); }

.nav-toggle {
  display: none;
  background: none; border: none; color: var(--cream);
  font-size: 1.5rem; cursor: pointer;
}

/* link "← Voltar ao site" das páginas internas (privacidade, termos, sites e sistemas) */
.nav-back { color: var(--gray); text-decoration: none; font-size: .85rem; letter-spacing: .04em; transition: color .2s; }
.nav-back:hover { color: var(--accent); }

/* ---------- botões de idioma (EN/PT) e tema (☀️/🌙) ---------- */
.lang-btn,
.theme-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  color: var(--cream);
  font-family: var(--mono);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
  cursor: pointer;
  margin-left: 0.5rem;
  transition: background-color .2s ease, color .2s ease, border-color .2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}
.theme-btn {
  font-size: 1rem;
  padding: 0.4rem 0.6rem;
}
.lang-btn:hover,
.theme-btn:hover {
  background: var(--accent);
  color: #000;
  border-color: var(--accent);
}

/* ---------- transparente enquanto está sobre a hero ---------- */
/* sem o desfoque aqui: sobre a cena 3D ele teria de ser refeito a cada quadro (pesado) */
body.on-hero nav { background: transparent !important; border-bottom-color: transparent !important; -webkit-backdrop-filter: none; backdrop-filter: none; }
body.on-hero nav .nav-logo,
body.on-hero nav .nav-links a,
body.on-hero nav .nav-toggle { color: #fff; }
body.on-hero nav .lang-btn,
body.on-hero nav .theme-btn { color: #fff; border-color: rgba(255,255,255,.3); background: rgba(255,255,255,.08); }

/* ---------- celular: links viram menu suspenso ---------- */
@media (max-width: 900px) {
  nav { padding: 1.25rem 2rem; }
  .nav-toggle { display: block; }
  .nav-links {
    position: absolute; top: 100%; left: 0; right: 0;
    background: var(--nav-scroll); border-bottom: 1px solid var(--border);
    flex-direction: column; gap: 1.5rem; padding: 2rem;
    display: none;
  }
  .nav-links.active { display: flex; }
}
/* celular: tudo numa linha só, sem o botão quebrar nem encostar no logo */
@media (max-width: 600px) {
  nav { padding: .85rem 1.1rem; }
  .nav-right { gap: .45rem; }
  .nav-cta { padding: .5rem .8rem; font-size: .72rem; letter-spacing: .01em; white-space: nowrap; }
  .nav-toggle { font-size: 1.3rem; padding: 0 .15rem; }
  .lang-btn, .theme-btn { margin-left: 0; padding: .35rem .5rem; }
}
/* telas muito estreitas: o botão sai (o contato continua na hero e no fim da página) */
@media (max-width: 350px) {
  .nav-cta { display: none; }
}