/**
 * Navigation Components
 *
 * Modern navigation styles using BEM methodology.
 * Includes:
 * - Top navbar (public pages)
 * - Sidebar navigation (dashboard pages)
 * - Mobile hamburger menu
 */

/* ========================================================================
   TOP NAVBAR (Public Pages)
   ======================================================================== */

.navbar {
  position: sticky;
  top: 0;
  z-index: var(--z-index-sticky);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) var(--spacing-lg);
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-gray-200);
  box-shadow: var(--shadow-sm);
}

/* Navbar Brand/Logo */
.navbar__brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-base);
}

.navbar__brand:hover {
  color: var(--color-primary-dark);
}

.navbar__logo {
  height: 45px;
  width: auto;
}

/* Navbar Links (Desktop) */
.navbar__nav {
  display: none;
  align-items: center;
  gap: var(--spacing-xl);
  margin: 0;
  padding: 0;
  list-style: none;
}

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

.navbar__link {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-700);
  text-decoration: none;
  transition: color var(--transition-base);
}

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

.navbar__link--active {
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
}

/* Navbar Actions */
.navbar__actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

/* Mobile Menu Toggle */
.navbar__toggle {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: var(--spacing-xs);
  background: none;
  border: none;
  cursor: pointer;
}

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

.navbar__toggle-line {
  width: 24px;
  height: 2px;
  background-color: var(--color-gray-700);
  transition: all var(--transition-base);
}

.navbar__toggle--active .navbar__toggle-line:nth-child(1) {
  transform: rotate(45deg) translateY(8px);
}

.navbar__toggle--active .navbar__toggle-line:nth-child(2) {
  opacity: 0;
}

.navbar__toggle--active .navbar__toggle-line:nth-child(3) {
  transform: rotate(-45deg) translateY(-8px);
}

/* Mobile Menu */
.navbar__mobile-menu {
  position: fixed;
  top: var(--navbar-height);
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-white);
  padding: var(--spacing-lg);
  transform: translateX(-100%);
  transition: transform var(--transition-base);
  z-index: var(--z-index-fixed);
}

.navbar__mobile-menu--active {
  transform: translateX(0);
}

.navbar__mobile-nav {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  margin: 0;
  padding: 0;
  list-style: none;
}

.navbar__mobile-link {
  padding: var(--spacing-md);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-700);
  text-decoration: none;
  border-radius: var(--border-radius-md);
  transition: background-color var(--transition-base), color var(--transition-base);
}

.navbar__mobile-link:hover {
  background-color: var(--color-primary-lighter);
  color: var(--color-primary);
}

/* ========================================================================
   SIDEBAR NAVIGATION (Dashboard Pages)
   ======================================================================== */

/* Sidebar Toggle (Checkbox hack for pure CSS implementation) */
.sidebar-toggle {
  display: none;
}

/* Hamburger Button */
.sidebar-hamburger {
  position: fixed;
  top: var(--spacing-md);
  left: var(--spacing-md);
  z-index: var(--z-index-fixed);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: var(--font-size-2xl);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-md);
  cursor: pointer;
  transition: all var(--transition-base);
  user-select: none;
}

.sidebar-hamburger:hover {
  background-color: var(--color-primary-dark);
  transform: scale(1.05);
}

/* Sidebar Menu */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background-color: var(--color-gray-900);
  color: var(--color-white);
  padding: var(--spacing-xl) 0;
  transform: translateX(-100%);
  transition: transform var(--transition-base);
  z-index: var(--z-index-modal);
  overflow-y: auto;
  box-shadow: var(--shadow-xl);
}

/* Show sidebar when toggle is checked */
.sidebar-toggle:checked ~ .sidebar {
  transform: translateX(0);
}

/* Sidebar Header */
.sidebar__header {
  padding: 0 var(--spacing-lg) var(--spacing-lg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  margin-bottom: var(--spacing-lg);
}

.sidebar__logo {
  height: 50px;
  width: auto;
}

.sidebar__title {
  margin-top: var(--spacing-sm);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-white);
}

/* Sidebar Navigation */
.sidebar__nav {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  padding: 0 var(--spacing-md);
  margin: 0;
  list-style: none;
}

.sidebar__link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  border-radius: var(--border-radius-md);
  transition: all var(--transition-base);
}

.sidebar__link:hover {
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--color-white);
}

.sidebar__link--active {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.sidebar__icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/* Sidebar Footer */
.sidebar__footer {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Overlay when sidebar is open */
.sidebar-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
  z-index: var(--z-index-modal-backdrop);
}

.sidebar-toggle:checked ~ .sidebar-overlay {
  opacity: 1;
  visibility: visible;
}

/* Dashboard Container (adjusted for sidebar) */
.dashboard-container {
  min-height: 100vh;
  padding: var(--spacing-xl);
  margin-left: 0;
  transition: margin-left var(--transition-base);
}

@media (min-width: 1024px) {
  .sidebar {
    transform: translateX(0);
  }

  .sidebar-hamburger {
    display: none;
  }

  .sidebar-overlay {
    display: none;
  }

  .dashboard-container {
    margin-left: var(--sidebar-width);
  }
}

/* ========================================================================
   BREADCRUMBS
   ======================================================================== */

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) 0;
  margin: 0;
  list-style: none;
  font-size: var(--font-size-sm);
}

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

.breadcrumb__link {
  color: var(--color-gray-600);
  text-decoration: none;
  transition: color var(--transition-base);
}

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

.breadcrumb__separator {
  color: var(--color-gray-400);
}

.breadcrumb__item--active .breadcrumb__link {
  color: var(--color-gray-900);
  font-weight: var(--font-weight-medium);
  pointer-events: none;
}

/* ========================================================================
   TABS NAVIGATION
   ======================================================================== */

.tabs {
  border-bottom: 2px solid var(--color-gray-200);
}

.tabs__nav {
  display: flex;
  gap: var(--spacing-md);
  margin: 0;
  padding: 0;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.tabs__link {
  position: relative;
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-600);
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all var(--transition-base);
}

.tabs__link:hover {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary-light);
}

.tabs__link--active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.tabs__content {
  padding: var(--spacing-lg) 0;
}

/* ========================================================================
   PAGINATION
   ======================================================================== */

.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  margin: var(--spacing-xl) 0;
}

.pagination__link {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 var(--spacing-sm);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-700);
  text-decoration: none;
  border: 1px solid var(--color-gray-300);
  border-radius: var(--border-radius-md);
  transition: all var(--transition-base);
}

.pagination__link:hover:not(.pagination__link--disabled) {
  background-color: var(--color-primary-lighter);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.pagination__link--active {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

.pagination__link--disabled {
  opacity: var(--opacity-disabled);
  cursor: not-allowed;
  pointer-events: none;
}

/* ========================================================================
   Responsive Adjustments
   ======================================================================== */

@media (max-width: 767px) {
  .navbar {
    padding: var(--spacing-sm) var(--spacing-md);
  }

  .navbar__logo {
    height: 36px;
  }

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

  .pagination__link {
    min-width: 36px;
    height: 36px;
    font-size: var(--font-size-sm);
  }
}