/* 📖 sections/nav.css — Barra de navegação principal */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: var(--z-sticky);
  display: flex;
  align-items: center;
  padding-inline: var(--space-6);
  transition: background 0.4s var(--ease-out), box-shadow 0.4s var(--ease-out);
}

.nav.is-scrolled {
  background: rgba(13, 17, 23, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(255,255,255,0.06);
}

@media (min-width: 1280px) {
  .nav { padding-inline: var(--space-12); }
}

.nav__inner {
  width: 100%;
  max-width: var(--max-width-content);
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

/* Logo */
.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
}

.nav__logo-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  background: var(--color-accent-subtle);
  border: var(--border-accent);
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav__logo-text {
  font-size: var(--text-xl);
  font-weight: var(--font-black);
  color: var(--color-text-primary);
  letter-spacing: var(--tracking-tight);
}

/* Links desktop */
.nav__links {
  display: none;
  align-items: center;
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .nav__links { display: flex; }
}

.nav__link {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  text-decoration: none;
  letter-spacing: var(--tracking-wide);
  transition: var(--transition-fast);
}

.nav__link:hover {
  color: var(--color-text-primary);
}

/* Ações */
.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Toggle menu mobile */
.nav__toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--color-bg-subtle);
  color: var(--color-text-secondary);
  flex-shrink: 0;
}

@media (min-width: 768px) {
  .nav__toggle { display: none; }
}

.nav__toggle svg {
  width: 18px;
  height: 18px;
}

/* Menu mobile */
.nav-mobile {
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: var(--color-bg-raised);
  border-bottom: var(--border-muted);
  padding: var(--space-4) var(--space-6);
  z-index: var(--z-dropdown);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  transform: translateY(-10px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s var(--ease-out), transform 0.25s var(--ease-out);
}

.nav-mobile.is-open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

@media (min-width: 768px) {
  .nav-mobile { display: none; }
}

.nav-mobile__link {
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  text-decoration: none;
  padding: var(--space-3) 0;
  border-bottom: var(--border-muted);
  transition: var(--transition-fast);
}

.nav-mobile__link:hover,
.nav-mobile__link:active {
  color: var(--color-text-primary);
}

.nav-mobile__link:last-child {
  border-bottom: none;
}