/*
PD Triglav - Sidebar Navigation
Professional vertical navigation system inspired by Triglav Insurance design
*/

/* === MOBILE HEADER === */

.mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: var(--pd-primary);
  z-index: var(--pd-z-sticky);
  border-bottom: 1px solid var(--pd-primary-light);
}

.mobile-header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding: 0 var(--pd-space-4);
}

.sidebar-toggle {
  background: none;
  border: none;
  color: var(--pd-white);
  font-size: var(--pd-text-xl);
  padding: var(--pd-space-2);
  border-radius: var(--pd-radius);
  transition: all var(--pd-transition-fast);
  cursor: pointer;
}

.sidebar-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: scale(1.05);
}

.mobile-header .brand-logo {
  color: var(--pd-white);
  text-decoration: none;
  font-weight: var(--pd-font-semibold);
  font-size: var(--pd-text-lg);
  display: flex;
  align-items: center;
  gap: var(--pd-space-2);
}

.mobile-user-actions {
  display: flex;
  align-items: center;
  gap: var(--pd-space-2);
}

/* === SIDEBAR LAYOUT === */

.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: 250px;
  height: 100vh;
  background: var(--pd-primary);
  z-index: var(--pd-z-fixed);
  display: flex;
  flex-direction: column;
  transition: transform var(--pd-transition-slow) var(--pd-ease-mountain);
  border-right: 1px solid var(--pd-primary-light);
  box-shadow: var(--pd-shadow-lg);
}

.sidebar-content {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--pd-primary-light) transparent;
}

.sidebar-content::-webkit-scrollbar {
  width: 4px;
}

.sidebar-content::-webkit-scrollbar-track {
  background: transparent;
}

.sidebar-content::-webkit-scrollbar-thumb {
  background: var(--pd-primary-light);
  border-radius: var(--pd-radius-full);
}

/* === SIDEBAR HEADER === */

.sidebar-header {
  padding: var(--pd-space-6) var(--pd-space-5) var(--pd-space-4);
  border-bottom: 1px solid var(--pd-primary-light);
}

.sidebar-brand {
  color: var(--pd-white);
  text-decoration: none;
  font-weight: var(--pd-font-bold);
  font-size: var(--pd-text-xl);
  display: flex;
  align-items: center;
  gap: var(--pd-space-3);
  transition: all var(--pd-transition-fast);
}

.sidebar-brand:hover {
  color: var(--pd-white);
  transform: scale(1.02);
}

.sidebar-brand i {
  font-size: var(--pd-text-2xl);
  color: var(--pd-accent-red);
}

/* === NAVIGATION ITEMS === */

.sidebar-nav {
  flex: 1;
  list-style: none;
  padding: var(--pd-space-4) 0;
  margin: 0;
}

.sidebar-nav .nav-item {
  position: relative;
}

.sidebar-nav .nav-link {
  display: flex;
  align-items: center;
  gap: var(--pd-space-3);
  padding: var(--pd-space-3) var(--pd-space-5);
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  font-weight: var(--pd-font-medium);
  font-size: var(--pd-text-base);
  transition: all var(--pd-transition-fast) var(--pd-ease-mountain);
  position: relative;
  border-left: 3px solid transparent;
}

.sidebar-nav .nav-link:hover {
  color: var(--pd-white);
  background: rgba(255, 255, 255, 0.05);
  transform: translateX(2px);
  border-left-color: var(--pd-accent-red);
}

.sidebar-nav .nav-link.active {
  color: var(--pd-white);
  background: var(--pd-accent-red);
  border-left-color: var(--pd-accent-red-dark);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.1);
}

.sidebar-nav .nav-link i {
  font-size: var(--pd-text-lg);
  width: 20px;
  text-align: center;
  flex-shrink: 0;
}

.sidebar-nav .nav-link span {
  flex: 1;
}

/* === EXPANDABLE SECTIONS === */

.nav-item.expandable .nav-toggle {
  cursor: pointer;
}

.nav-item.expandable .toggle-icon {
  font-size: var(--pd-text-sm);
  margin-left: auto;
  transition: transform 300ms var(--pd-ease-mountain);
}

.nav-item.expandable .toggle-icon.rotated {
  transform: rotate(90deg);
}

.nav-submenu {
  list-style: none;
  padding: 0;
  margin: 0;
  max-height: 0;
  overflow: hidden;
  background: rgba(0, 0, 0, 0.2);
  transition: max-height 300ms var(--pd-ease-valley);
}

/* Expanded state is now managed entirely by JavaScript to prevent conflicts */
.nav-submenu.expanded {
  /* max-height set by JavaScript for smooth animations */
}

/* Auto-expand submenus containing active items to prevent flicker */
.nav-submenu:has(a.active) {
  max-height: 400px !important;
}

/* Fallback for browsers that don't support :has() */
.nav-submenu.has-active-item {
  max-height: 400px !important;
}

.nav-submenu li {
  position: relative;
}

.nav-submenu a {
  display: flex;
  align-items: center;
  gap: var(--pd-space-3);
  padding: var(--pd-space-2) var(--pd-space-5) var(--pd-space-2) var(--pd-space-12);
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  font-size: var(--pd-text-sm);
  font-weight: var(--pd-font-normal);
  transition: all var(--pd-transition-fast);
  border-left: 3px solid transparent;
}

.nav-submenu a:hover {
  color: var(--pd-white);
  background: rgba(255, 255, 255, 0.05);
  border-left-color: var(--pd-accent-red);
  transform: translateX(2px);
}

.nav-submenu a.active {
  color: var(--pd-white);
  background: var(--pd-accent-red);
  border-left-color: var(--pd-accent-red-dark);
}

.nav-submenu a i {
  font-size: var(--pd-text-sm);
  width: 16px;
  text-align: center;
  opacity: 0.8;
}

/* === SIDEBAR FOOTER === */

.sidebar-footer {
  padding: var(--pd-space-4) var(--pd-space-5);
  border-top: 1px solid var(--pd-primary-light);
  background: var(--pd-primary-dark);
}

.user-section {
  display: flex;
  flex-direction: column;
  gap: var(--pd-space-2);
}

.theme-toggle-sidebar {
  background: none;
  border: 1px solid var(--pd-primary-light);
  color: rgba(255, 255, 255, 0.8);
  padding: var(--pd-space-2) var(--pd-space-3);
  border-radius: var(--pd-radius);
  font-size: var(--pd-text-sm);
  display: flex;
  align-items: center;
  gap: var(--pd-space-2);
  cursor: pointer;
  transition: all var(--pd-transition-fast);
  width: 100%;
}

.theme-toggle-sidebar:hover {
  color: var(--pd-white);
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--pd-accent-red);
}

.user-profile-sidebar {
  display: flex;
  align-items: center;
  gap: var(--pd-space-3);
  padding: var(--pd-space-3);
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--pd-radius);
  color: var(--pd-white);
  text-decoration: none;
  transition: all var(--pd-transition-fast);
  font-size: var(--pd-text-sm);
}

.user-profile-sidebar:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--pd-white);
  transform: translateY(-1px);
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--pd-radius-full);
  background: var(--pd-accent-red);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--pd-font-semibold);
  font-size: var(--pd-text-sm);
  color: var(--pd-white);
  flex-shrink: 0;
}

.auth-links {
  display: flex;
  flex-direction: column;
  gap: var(--pd-space-2);
}

.auth-link {
  display: flex;
  align-items: center;
  gap: var(--pd-space-2);
  padding: var(--pd-space-2) var(--pd-space-3);
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  font-size: var(--pd-text-sm);
  border-radius: var(--pd-radius);
  transition: all var(--pd-transition-fast);
}

.auth-link:hover {
  color: var(--pd-white);
  background: rgba(255, 255, 255, 0.05);
}

.auth-link.login {
  background: var(--pd-accent-red);
  color: var(--pd-white);
}

.auth-link.login:hover {
  background: var(--pd-accent-red-dark);
  color: var(--pd-white);
}

/* === SIDEBAR OVERLAY === */

.sidebar-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: var(--pd-z-modal-backdrop);
  opacity: 0;
  visibility: hidden;
  transition: all var(--pd-transition-normal);
}

.sidebar-overlay.show {
  opacity: 1;
  visibility: visible;
}

/* === RESPONSIVE DESIGN === */

/* Desktop: Show sidebar, hide mobile header */
@media (min-width: 992px) {
  .mobile-header {
    display: none;
  }
  
  .sidebar {
    position: fixed;
    transform: translateX(0);
  }
  
  .sidebar-overlay {
    display: none;
  }
}

/* Mobile: Hide sidebar by default, show mobile header */
@media (max-width: 991px) {
  .mobile-header {
    display: block;
  }
  
  .sidebar {
    transform: translateX(-100%);
  }
  
  .sidebar.show {
    transform: translateX(0);
  }
  
  .sidebar-overlay.show {
    display: block;
  }
}

/* Tablet adjustments */
@media (max-width: 768px) {
  .sidebar {
    width: 280px;
  }
  
  .sidebar-nav .nav-link {
    padding: var(--pd-space-4) var(--pd-space-5);
    font-size: var(--pd-text-lg);
  }
  
  .nav-submenu a {
    padding: var(--pd-space-3) var(--pd-space-5) var(--pd-space-3) var(--pd-space-12);
    font-size: var(--pd-text-base);
  }
}

/* === ACCESSIBILITY === */

@media (prefers-reduced-motion: reduce) {
  .sidebar,
  .nav-submenu,
  .sidebar-nav .nav-link,
  .nav-submenu a,
  .toggle-icon {
    transition: none;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .sidebar {
    border-right: 2px solid var(--pd-white);
  }
  
  .sidebar-nav .nav-link,
  .nav-submenu a {
    border: 1px solid transparent;
  }
  
  .sidebar-nav .nav-link:hover,
  .nav-submenu a:hover {
    border-color: var(--pd-white);
  }
  
  .sidebar-nav .nav-link.active,
  .nav-submenu a.active {
    border-color: var(--pd-accent-red);
  }
}

/* Focus states for keyboard navigation */
.sidebar-nav .nav-link:focus,
.nav-submenu a:focus,
.sidebar-toggle:focus,
.theme-toggle-sidebar:focus {
  outline: 2px solid var(--pd-accent-red);
  outline-offset: 2px;
}

/* === ANIMATIONS === */

@keyframes slideIn {
  from {
    transform: translateX(-100%);
  }
  to {
    transform: translateX(0);
  }
}

@keyframes slideOut {
  from {
    transform: translateX(0);
  }
  to {
    transform: translateX(-100%);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* === UTILITY CLASSES === */

.sidebar-hidden {
  transform: translateX(-100%) !important;
}

.sidebar-visible {
  transform: translateX(0) !important;
}

.submenu-expanded {
  max-height: 400px !important;
}

.submenu-collapsed {
  max-height: 0 !important;
}