/* ============================================
   NAV.CSS — Barra de navegação + hambúrguer
   ============================================ */

nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 1.5rem 4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  background: rgba(2, 4, 8, 0.7);
}

.logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.4rem;
  letter-spacing: -0.02em;
  text-decoration: none;
  color: var(--text);
}

.logo span { color: var(--accent); }

nav ul {
  list-style: none;
  display: flex;
  gap: 2.5rem;
}

nav a {
  font-size: 0.85rem;
  color: var(--muted);
  text-decoration: none;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: color var(--transition);
}

nav a:hover { color: var(--accent); }

.nav-cta {
  background: var(--accent);
  color: var(--bg) !important;
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius);
  font-weight: 700 !important;
  transition: opacity 0.2s, transform 0.2s !important;
}

.nav-cta:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

/* Hambúrguer */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 200;
}

.hamburger span {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }