/* ============================================================
   ROO3 | Header / Navbar compartilhado  (css/nav.css)
   Fonte única do header em TODAS as páginas. Espelha o nav da home.
   Use junto de:  partials/nav.php  +  js/app.js (scroll/hambúrguer)
   +  js/premium.js & css/premium.css (rastro binário 0/1).
   Variáveis próprias (--nav-*) para não depender da paleta de cada página.
   ============================================================ */
:root {
  --nav-neon:        #a3ff47;
  --nav-neon-glow:   rgba(163,255,71,0.35);
  --nav-black:       #0a0a0a;
  --nav-black-border:#1e1e1e;
  --nav-white:       #ffffff;
  --nav-white-dim:   rgba(255,255,255,0.7);
  --nav-white-faint: rgba(255,255,255,0.08);
  --nav-radius:      10px;
  --nav-transition:  0.3s cubic-bezier(0.4,0,0.2,1);
}

#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: transparent;
  border-bottom: 0;
  transition: background var(--nav-transition), box-shadow var(--nav-transition);
}
#navbar.scrolled {
  background: rgba(10,10,10,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 var(--nav-black-border);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.nav-logo img {
  height: 44px;
  width: auto;
  filter: drop-shadow(0 0 8px var(--nav-neon-glow));
  transition: filter var(--nav-transition);
}
.nav-logo:hover img { filter: drop-shadow(0 0 16px var(--nav-neon-glow)); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-link {
  padding: 8px 16px;
  border-radius: var(--nav-radius);
  color: var(--nav-white-dim);
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  transition: color var(--nav-transition), background var(--nav-transition);
  position: relative;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 4px; left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 20px; height: 2px;
  background: var(--nav-neon);
  border-radius: 1px;
  transition: transform var(--nav-transition);
  box-shadow: 0 0 6px var(--nav-neon-glow);
}
.nav-link:hover { color: var(--nav-white); background: var(--nav-white-faint); }
.nav-link:hover::after { transform: translateX(-50%) scaleX(1); }
.nav-link.is-active,
.nav-link.active { color: var(--nav-neon); }
.nav-link.is-active::after,
.nav-link.active::after { transform: translateX(-50%) scaleX(1); }

.btn-whatsapp-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: var(--nav-neon);
  color: var(--nav-black);
  border-radius: var(--nav-radius);
  font-size: 0.875rem;
  font-weight: 700;
  text-decoration: none;
  transition: all var(--nav-transition);
  box-shadow: 0 0 20px var(--nav-neon-glow);
  white-space: nowrap;
}
.btn-whatsapp-nav:hover {
  background: var(--nav-white);
  box-shadow: 0 0 30px rgba(255,255,255,0.3);
  transform: translateY(-1px);
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: none;
  border: 0;
  cursor: pointer;
}
.nav-hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--nav-white);
  border-radius: 1px;
  transition: all var(--nav-transition);
}
.nav-hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-hamburger.active span:nth-child(2) { opacity: 0; }
.nav-hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

.nav-mobile {
  display: none;
  position: fixed;
  top: 72px; left: 0; right: 0;
  background: rgba(10,10,10,0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--nav-black-border);
  padding: 20px 24px;
  transform: translateY(-10px);
  opacity: 0;
  transition: all var(--nav-transition);
  z-index: 99;
}
.nav-mobile.open {
  display: block;
  transform: translateY(0);
  opacity: 1;
}
.nav-mobile ul { display: flex; flex-direction: column; gap: 8px; list-style: none; margin: 0; padding: 0; }
.nav-mobile .nav-link { display: block; padding: 12px 16px; font-size: 1rem; }
.nav-mobile .btn-whatsapp-nav { margin-top: 8px; justify-content: center; }

@media (max-width: 768px) {
  .nav-links,
  .nav-container > .btn-whatsapp-nav { display: none; }
  .nav-hamburger { display: flex; }
}