/* ==========================================================================
   Paulista Documentação — nav.css
   Navbar fixa (glassmorphism, pill) + menu mobile + troca de tema.
   ========================================================================== */

#navbar {
  position: fixed;
  top: clamp(.6rem, 1.5vw, 1rem);
  left: 50%;
  transform: translateX(-50%);
  z-index: 130;
  width: min(calc(100% - 2 * var(--pad-x)), var(--container));
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0 1rem 0 1.4rem;
  border: 1px solid var(--border-sub);
  border-radius: var(--r-pill);
  background: var(--glass);
  backdrop-filter: blur(7px);
  -webkit-backdrop-filter: blur(7px);
  transition: box-shadow .3s var(--ease-out), background .3s var(--ease-out), border-color .3s var(--ease-out);
}
#navbar.is-scrolled {
  background: var(--glass-scroll);
  border-color: var(--border);
  box-shadow: var(--shadow-float);
}

/* Marca (logo oficial que troca conforme o tema) */
.nav-brand {
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  flex-shrink: 0;
}
.nav-brand .brand-logo { height: 30px; width: auto; }

/* Links desktop */
.nav-links {
  display: flex;
  align-items: center;
  gap: .35rem;
}
.nav-links a {
  padding: .55rem .9rem;
  font-size: .92rem;
  font-weight: 500;
  color: var(--text-mid);
  border-radius: var(--r-pill);
  transition: color .2s var(--ease-out), background .2s var(--ease-out);
}
.nav-links a:hover,
.nav-links a.is-active { color: var(--text-hi); background: var(--gold-glow-s); }

.nav-actions { display: inline-flex; align-items: center; gap: .6rem; }
.nav-cta .btn-cta { padding: .65rem 1.25rem; font-size: .9rem; }

/* Botão de troca de tema */
.theme-toggle {
  width: 42px; height: 42px;
  flex-shrink: 0;
  display: grid; place-content: center;
  border-radius: var(--r-tile);
  border: 1px solid var(--border-sub);
  color: var(--text-mid);
  transition: color .25s var(--ease-out), border-color .25s var(--ease-out), background .25s var(--ease-out), transform .3s var(--ease-spring);
}
.theme-toggle:hover { color: var(--gold); border-color: var(--border); background: var(--gold-glow-s); transform: translateY(-2px); }
.theme-toggle svg { width: 20px; height: 20px; }
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
[data-theme="light"] .theme-toggle .icon-sun { display: block; }
[data-theme="light"] .theme-toggle .icon-moon { display: none; }

/* Hamburger */
.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  border-radius: var(--r-tile);
  position: relative;
  border: 1px solid var(--border-sub);
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: '';
  position: absolute;
  left: 50%; top: 50%;
  width: 20px; height: 2px;
  background: var(--text-hi);
  border-radius: 2px;
  transform: translate(-50%, -50%);
  transition: transform .3s var(--ease-out), opacity .2s var(--ease-out);
}
.nav-toggle span::before { transform: translate(-50%, -8px); }
.nav-toggle span::after  { transform: translate(-50%,  8px); }
body.menu-open .nav-toggle span { background: transparent; }
body.menu-open .nav-toggle span::before { transform: translate(-50%,0) rotate(45deg); }
body.menu-open .nav-toggle span::after  { transform: translate(-50%,0) rotate(-45deg); }

/* Overlay mobile */
.nav-overlay {
  position: fixed;
  inset: 0;
  z-index: 125;
  background: var(--glass-scroll);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .4rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity .35s var(--ease-out), visibility .35s;
}
body.menu-open .nav-overlay { opacity: 1; visibility: visible; }
.nav-overlay a {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-hi);
  padding: .7rem 1.5rem;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .3s var(--ease-out), transform .3s var(--ease-out), color .2s var(--ease-out);
}
.nav-overlay a:hover { color: var(--gold); }
body.menu-open .nav-overlay a { opacity: 1; transform: translateY(0); }
body.menu-open .nav-overlay a:nth-child(1) { transition-delay: .05s; }
body.menu-open .nav-overlay a:nth-child(2) { transition-delay: .10s; }
body.menu-open .nav-overlay a:nth-child(3) { transition-delay: .15s; }
body.menu-open .nav-overlay a:nth-child(4) { transition-delay: .20s; }
body.menu-open .nav-overlay a:nth-child(5) { transition-delay: .25s; }
body.menu-open .nav-overlay a:nth-child(6) { transition-delay: .30s; }
body.menu-open .nav-overlay a:nth-child(7) { transition-delay: .35s; }
.nav-overlay .btn-cta { margin-top: 1.4rem; font-size: 1rem; }

@media (max-width: 860px) {
  .nav-links, .nav-cta { display: none; }
  .nav-toggle { display: inline-flex; }
}
@media (min-width: 861px) {
  .nav-overlay { display: none; }
}