/**
 * Navigation - Sistema de Navegação e Menu
 * Menu moderno com suporte a múltiplas páginas
 */

/* ========== Container do Header com Navegação ========== */
header {
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--surface-primary) 100%);
  border-bottom: 1px solid var(--border-color);
  padding: var(--spacing-lg) var(--spacing-xl);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
}

.header-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-xl);
}

/* ========== Logo/Brand ========== */
.header-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  text-decoration: none;
  flex-shrink: 0;
}

.header-brand h1 {
  margin: 0;
  font-size: var(--font-size-lg);
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-success));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
}

/* ========== Navegação Principal ========== */
.header-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex: 1;
  justify-content: center;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--border-radius);
  transition: all var(--transition-fast);
  position: relative;
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--text-primary);
  background: var(--surface-secondary);
}

.nav-link.active {
  color: var(--accent-primary);
  background: var(--accent-primary-light);
  font-weight: 600;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 40%;
  height: 2px;
  background: var(--accent-primary);
  border-radius: 2px;
}

/* ========== Header Actions ========== */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  flex-shrink: 0;
}

/* ========== Menu Mobile Toggle ========== */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  border: 1px solid var(--border-color);
  padding: 10px;
  cursor: pointer;
  border-radius: var(--border-radius);
  transition: all var(--transition-fast);
  width: 44px;
  height: 44px;
  justify-content: center;
  align-items: center;
}

.menu-toggle:hover {
  background: var(--surface-secondary);
  border-color: var(--border-color-hover);
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2.5px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.menu-toggle.active {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
}

.menu-toggle.active span {
  background: white;
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(7px, 7px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
  transform: translateX(-20px);
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}

/* ========== Responsividade - Tablet ========== */
@media (max-width: 1024px) {
  .header-container {
    gap: var(--spacing-md);
  }

  .header-brand h1 {
    font-size: var(--font-size-md);
  }

  .nav-link {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-xs);
  }
}

/* ========== Responsividade - Mobile ========== */
@media (max-width: 768px) {
  header {
    padding: var(--spacing-md);
  }

  .header-container {
    flex-wrap: nowrap;
    position: relative;
  }

  .header-brand {
    flex: 1;
    min-width: 0;
  }

  .header-brand h1 {
    font-size: var(--font-size-md);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .menu-toggle {
    display: flex;
    flex-shrink: 0;
    z-index: 1001;
  }

  .header-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--surface-primary);
    border-bottom: 1px solid var(--border-color);
    padding-top: 70px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
    opacity: 0;
    z-index: 1000;
  }

  .header-nav.open {
    max-height: 100vh;
    opacity: 1;
  }

  .nav-menu {
    flex-direction: column;
    width: 100%;
    gap: 0;
    padding: var(--spacing-md);
  }

  .nav-item {
    width: 100%;
  }

  .nav-link {
    width: 100%;
    padding: var(--spacing-lg);
    justify-content: flex-start;
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-xs);
  }

  .nav-link.active::after {
    display: none;
  }

  .header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
  }

  .btn-header-action {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 11px;
  }

  .btn-header-action span {
    display: none;
  }
}

/* ========== Responsividade - Mobile Pequeno ========== */
@media (max-width: 480px) {
  header {
    padding: var(--spacing-md) var(--spacing-sm);
  }

  .header-brand h1 {
    font-size: 15px;
  }

  .menu-toggle {
    padding: var(--spacing-xs);
  }

  .menu-toggle span {
    width: 20px;
  }

  .nav-link {
    padding: var(--spacing-md);
    font-size: var(--font-size-sm);
  }

  .nav-icon {
    font-size: 18px;
  }
}

/* ========== Animações ========== */
@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.nav-menu {
  animation: fadeInDown 0.3s ease;
}

/* ========== Utilitários ========== */
.nav-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  padding: 0 4px;
  font-size: 10px;
  font-weight: 600;
  color: white;
  background: var(--accent-danger);
  border-radius: 9px;
  margin-left: var(--spacing-xs);
}

.nav-icon {
  font-size: 16px;
}