/**
 * Modern Sidebar Navigation
 * ClickUp-Inspired Icon-First Design
 * Version 2.0 - December 2025
 */

/* ========================================
   CSS VARIABLES
   ======================================== */

:root {
  --color-primary-rgb: 79, 70, 229; /* Indigo-600 */
  --color-danger-rgb: 239, 68, 68;  /* Red-500 */
}

/* ========================================
   SIDEBAR CONTAINER
   ======================================== */

.sidebar-modern {
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  width: 75px;
  background: #000000;
  border-right: 1px solid rgba(255, 255, 255, 0.1);
  transition: width var(--transition-slow), box-shadow var(--transition-base);
  z-index: var(--z-fixed);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.dark .sidebar-modern {
  background: #000000;
  border-right-color: rgba(255, 255, 255, 0.1);
}

/* Expanded State (on hover or pinned) */
.sidebar-modern.expanded {
  width: 240px;
  box-shadow: var(--shadow-lg);
}

/* Pinned State (user preference) */
.sidebar-modern.pinned {
  width: 240px;
}

/* ========================================
   LOGO SECTION
   ======================================== */

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  min-height: 64px;
  flex-shrink: 0;
}

.dark .sidebar-logo {
  border-bottom-color: rgba(255, 255, 255, 0.1);
}

.logo-icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  transition: transform var(--transition-base);
}

.sidebar-modern:hover .logo-icon {
  transform: scale(1.1);
}

.logo-text {
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  white-space: nowrap;
  opacity: 0;
  transform: translateX(-10px);
  transition: opacity var(--transition-base), transform var(--transition-base);
  color: #FFFFFF;
}

.dark .logo-text {
  color: #FFFFFF;
}

.sidebar-modern.expanded .logo-text,
.sidebar-modern.pinned .logo-text {
  opacity: 1;
  transform: translateX(0);
}

/* Pin Button */
.sidebar-pin-btn {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-gray-500);
  transition: all var(--transition-fast);
  cursor: pointer;
  margin-left: auto;
  background: transparent;
  border: none;
  opacity: 0;
  color: rgba(255, 255, 255, 0.6);
}

.sidebar-modern.expanded .sidebar-pin-btn,
.sidebar-modern.pinned .sidebar-pin-btn {
  opacity: 1;
}

.sidebar-pin-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-primary);
}

.dark .sidebar-pin-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-primary-light);
}

.sidebar-pin-btn.active {
  background: rgba(123, 104, 238, 0.2); /* Purple highlight when pinned */
  color: var(--color-primary-light);
  transform: rotate(45deg); /* Visual indicator: pinned */
}

.sidebar-pin-btn.active:hover {
  background: rgba(123, 104, 238, 0.3);
  color: var(--color-primary);
}

/* ========================================
   NAVIGATION CONTAINER
   ======================================== */

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

/* Custom scrollbar for sidebar */
.sidebar-nav::-webkit-scrollbar {
  width: 4px;
}

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

.sidebar-nav::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-full);
}

.sidebar-nav::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.3);
}

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

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  transition: all var(--transition-base);
  white-space: nowrap;
  text-decoration: none;
  cursor: pointer;
  border: none;
  background: transparent;
  width: 100%;
  text-align: left;
}

.nav-link:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #FFFFFF;
}

.dark .nav-link {
  color: rgba(255, 255, 255, 0.7);
}

.dark .nav-link:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #FFFFFF;
}

/* Active State with Left Border Indicator */
.nav-link.active {
  background: rgba(123, 104, 238, 0.3);
  color: var(--color-primary-light);
  font-weight: var(--font-semibold);
}

.dark .nav-link.active {
  background: rgba(123, 104, 238, 0.15);
  color: var(--color-primary-light);
}

.nav-link.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 24px;
  background: var(--color-primary);
  border-radius: 0 2px 2px 0;
}

/* ========================================
   NAVIGATION ICONS
   ======================================== */

.nav-icon {
  font-size: 20px;
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ========================================
   NAVIGATION LABELS
   ======================================== */

.nav-label {
  flex: 1;
  opacity: 0;
  transform: translateX(-10px);
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.sidebar-modern.expanded .nav-label,
.sidebar-modern.pinned .nav-label {
  opacity: 1;
  transform: translateX(0);
}

/* ========================================
   BADGE COUNTER
   ======================================== */

.badge-count {
  background: var(--color-primary);
  color: white;
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  padding: 2px 6px;
  border-radius: var(--radius-full);
  min-width: 20px;
  text-align: center;
  opacity: 0;
  transform: scale(0.8);
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.sidebar-modern.expanded .badge-count,
.sidebar-modern.pinned .badge-count {
  opacity: 1;
  transform: scale(1);
}

/* Badge dot (for collapsed state) */
.badge-dot {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 8px;
  height: 8px;
  background: var(--color-primary);
  border: 2px solid #000000;
  border-radius: 50%;
}

.dark .badge-dot {
  border-color: #000000;
}

.sidebar-modern.expanded .badge-dot,
.sidebar-modern.pinned .badge-dot {
  display: none;
}

/* ========================================
   SUBMENU ITEMS
   ======================================== */

/* Chevron Icon */
.nav-chevron {
  font-size: 14px;
  transition: transform var(--transition-base);
  opacity: 0;
}

.sidebar-modern.expanded .nav-chevron,
.sidebar-modern.pinned .nav-chevron {
  opacity: 1;
}

.nav-item.submenu-open .nav-chevron {
  transform: rotate(90deg);
}

/* Submenu Container (Inline - when expanded) */
.sub-menu {
  display: none;
  flex-direction: column;
  gap: var(--space-1);
  padding-left: var(--space-8);
  margin-top: var(--space-1);
}

.sidebar-modern.expanded .nav-item.submenu-open .sub-menu,
.sidebar-modern.pinned .nav-item.submenu-open .sub-menu {
  display: flex;
}

.sub-menu .nav-link {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: var(--font-normal);
}

/* ========================================
   FLYOUT SUBMENU (Collapsed State)
   ======================================== */

.submenu-flyout {
  position: fixed;
  left: 60px;
  background: #000000;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--space-3);
  min-width: 240px;
  z-index: calc(var(--z-fixed) + 10);
  opacity: 0;
  pointer-events: none;
  transform: translateX(-10px);
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.dark .submenu-flyout {
  background: #000000;
  border-color: rgba(255, 255, 255, 0.1);
}

.nav-item:hover .submenu-flyout {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(0);
}

/* Hide flyout when sidebar is expanded */
.sidebar-modern.expanded .submenu-flyout,
.sidebar-modern.pinned .submenu-flyout {
  display: none;
}

.submenu-header {
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
  color: rgba(255, 255, 255, 0.5);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  padding: var(--space-2) var(--space-3);
  margin-bottom: var(--space-2);
}

.dark .submenu-header {
  color: rgba(255, 255, 255, 0.5);
}

.submenu-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--text-base);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.submenu-link:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #FFFFFF;
}

.dark .submenu-link {
  color: rgba(255, 255, 255, 0.7);
}

.dark .submenu-link:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #FFFFFF;
}

.submenu-link.active {
  background: rgba(123, 104, 238, 0.15);
  color: var(--color-primary-light);
  font-weight: var(--font-semibold);
}

/* ========================================
   SECTION DIVIDER
   ======================================== */

.nav-divider {
  margin: var(--space-4) 0 var(--space-2);
  position: relative;
}

.divider-label {
  font-size: var(--text-xs);
  font-weight: var(--font-bold);
  color: rgba(255, 255, 255, 0.4);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  padding: 0 var(--space-3);
  opacity: 0;
  transform: translateX(-10px);
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.dark .divider-label {
  color: rgba(255, 255, 255, 0.4);
}

.sidebar-modern.expanded .divider-label,
.sidebar-modern.pinned .divider-label {
  opacity: 1;
  transform: translateX(0);
}

/* Divider line (for collapsed state) */
.nav-divider::before {
  content: '';
  position: absolute;
  top: 50%;
  left: var(--space-3);
  right: var(--space-3);
  height: 1px;
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-50%);
}

.dark .nav-divider::before {
  background: rgba(255, 255, 255, 0.1);
}

.sidebar-modern.expanded .nav-divider::before,
.sidebar-modern.pinned .nav-divider::before {
  display: none;
}

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

.sidebar-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--space-3);
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.dark .sidebar-footer {
  border-top-color: rgba(255, 255, 255, 0.1);
}

/* Footer Item */
.footer-item {
  position: relative;
}

.footer-item-content {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  color: rgba(255, 255, 255, 0.7);
  cursor: pointer;
  transition: all var(--transition-fast);
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  position: relative;
}

.footer-item-content:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #FFFFFF;
}

.footer-icon {
  font-size: 16px;
  flex-shrink: 0;
  color: var(--color-primary);
  transition: transform var(--transition-fast);
}

.footer-label {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  opacity: 0;
  transform: translateX(-10px);
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.sidebar-modern.expanded .footer-label,
.sidebar-modern.pinned .footer-label {
  opacity: 1;
  transform: translateX(0);
}

.footer-chevron {
  margin-left: auto;
  font-size: 12px;
  transition: transform var(--transition-fast);
  opacity: 0;
}

.sidebar-modern.expanded .footer-chevron,
.sidebar-modern.pinned .footer-chevron {
  opacity: 1;
}

/* Credits Display */
.footer-credits .footer-item-content {
  cursor: default;
  background: rgba(var(--color-primary-rgb), 0.1);
}

.footer-credits .footer-item-content:hover {
  background: rgba(var(--color-primary-rgb), 0.15);
}

.footer-credits .footer-label {
  font-weight: var(--font-bold);
  color: var(--color-primary);
}

/* Footer Dropdown Menu */
.footer-dropdown {
  position: relative;
}

.footer-dropdown-menu {
  position: absolute;
  bottom: 100%;
  left: 0;
  right: 0;
  margin-bottom: var(--space-2);
  background: #1a1a1a;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: var(--space-2);
  min-width: 220px;
  max-height: 300px;
  overflow-y: auto;
  box-shadow: var(--shadow-xl);
  z-index: calc(var(--z-fixed) + 10);
}

.dark .footer-dropdown-menu {
  background: #1a1a1a;
  border-color: rgba(255, 255, 255, 0.1);
}

/* Collapsed State: Position dropdown to the right */
.sidebar-modern:not(.expanded):not(.pinned) .footer-dropdown-menu {
  left: 75px;
  bottom: 0;
  right: auto;
}

.dropdown-header {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: rgba(255, 255, 255, 0.5);
  padding: var(--space-2) var(--space-3);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  margin-bottom: var(--space-2);
}

.dropdown-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  color: rgba(255, 255, 255, 0.8);
  transition: all var(--transition-fast);
  cursor: pointer;
  gap: var(--space-2);
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  font-size: var(--text-sm);
}

.dropdown-item:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #FFFFFF;
}

.dropdown-item.active {
  background: rgba(var(--color-primary-rgb), 0.15);
  color: var(--color-primary);
}

.dropdown-item i {
  font-size: 14px;
  flex-shrink: 0;
}

.dropdown-divider {
  height: 1px;
  background: rgba(255, 255, 255, 0.1);
  margin: var(--space-2) 0;
}

/* Avatar */
.footer-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  object-fit: cover;
  flex-shrink: 0;
}

.footer-avatar-placeholder {
  background: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-bold);
  color: white;
  font-size: var(--text-sm);
}

/* Notification Badge */
.notification-badge {
  position: absolute;
  top: 6px;
  right: 6px;
  background: var(--color-danger);
  color: white;
  font-size: 10px;
  font-weight: var(--font-bold);
  padding: 2px 5px;
  border-radius: var(--radius-full);
  line-height: 1;
  min-width: 18px;
  text-align: center;
  opacity: 0;
  transform: scale(0.8);
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.sidebar-modern.expanded .notification-badge,
.sidebar-modern.pinned .notification-badge {
  opacity: 1;
  transform: scale(1);
}

/* Notifications Menu Specific */
.notifications-menu {
  max-height: 400px;
}

.empty-state {
  text-align: center;
  padding: var(--space-8) var(--space-4);
  color: rgba(255, 255, 255, 0.5);
}

.empty-state i {
  font-size: 32px;
  margin-bottom: var(--space-3);
  display: block;
}

.empty-state p {
  font-size: var(--text-sm);
  margin: 0;
}

/* Danger/Logout Item */
.dropdown-item.text-danger {
  color: var(--color-danger);
}

.dropdown-item.text-danger:hover {
  background: rgba(var(--color-danger-rgb, 239, 68, 68), 0.1);
  color: var(--color-danger);
}

/* ========================================
   MAIN CONTENT ADJUSTMENT
   ======================================== */

/* Override TailwindCSS old sidebar margins with !important for modern sidebar */
@media (min-width: 1024px) {
  /* Default: collapsed sidebar (75px) */
  .main-container .main-content:where([dir=ltr], [dir=ltr] *) {
    margin-left: 75px !important;
    transition: margin-left var(--transition-slow);
  }
  
  /* Pinned: expanded sidebar (240px) - Target body class */
  body.sidebar-pinned .main-container .main-content:where([dir=ltr], [dir=ltr] *) {
    margin-left: 240px !important;
  }
  
  /* RTL Support */
  .main-container .main-content:where([dir=rtl], [dir=rtl] *) {
    margin-right: 75px !important;
    transition: margin-right var(--transition-slow);
  }
  
  body.sidebar-pinned .main-container .main-content:where([dir=rtl], [dir=rtl] *) {
    margin-right: 240px !important;
  }
}

/* Base container styling */
.main-container {
  transition: margin-left var(--transition-slow);
  min-height: 100vh;
}

/* Mobile: no margin for collapsed sidebar */
@media (max-width: 1023px) {
  .main-container {
    margin-left: 0;
    margin-bottom: 64px; /* Space for mobile bottom nav */
  }
}

/* Main Content Typography */
.main-content {
  font-size: 16px; /* Base font size for better readability (↑ from 14px) */
  line-height: 1.6; /* Comfortable line height for reading */
  color: var(--color-gray-800);
  padding-top: 0;
}

.dark .main-content {
  color: var(--color-gray-200);
}

/* Content headings */
.main-content h1 {
  font-size: 2rem; /* 32px */
  line-height: 1.3;
  margin-bottom: var(--space-4);
}

.main-content h2 {
  font-size: 1.75rem; /* 28px */
  line-height: 1.3;
  margin-bottom: var(--space-3);
}

.main-content h3 {
  font-size: 1.5rem; /* 24px */
  line-height: 1.4;
  margin-bottom: var(--space-3);
}

.main-content h4 {
  font-size: 1.25rem; /* 20px */
  line-height: 1.4;
  margin-bottom: var(--space-2);
}

.main-content p {
  margin-bottom: var(--space-4);
}

/* Content spacing */
.main-content > * + * {
  margin-top: var(--space-4);
}

/* Lists */
.main-content ul,
.main-content ol {
  /* margin-left: var(--space-6); */
  margin-bottom: var(--space-4);
}

.main-content li {
  margin-bottom: var(--space-2);
}

/* ========================================
   MOBILE NAVIGATION (Bottom Bar)
   ======================================== */

@media (max-width: 768px) {
  .sidebar-modern {
    top: auto;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    height: 64px;
    border-right: none;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    flex-direction: row;
  }
  
  .dark .sidebar-modern {
    border-top-color: rgba(255, 255, 255, 0.1);
  }
  
  .sidebar-logo {
    display: none;
  }
  
  .sidebar-nav {
    flex-direction: row;
    justify-content: space-around;
    padding: var(--space-2);
    gap: 0;
    overflow-x: auto;
    overflow-y: hidden;
  }
  
  .nav-item {
    flex-shrink: 0;
  }
  
  .nav-link {
    flex-direction: column;
    gap: var(--space-1);
    padding: var(--space-2);
    min-width: 64px;
  }
  
  .nav-icon {
    font-size: 24px;
  }
  
  .nav-label {
    font-size: var(--text-xs);
    opacity: 1;
    transform: none;
    text-align: center;
  }
  
  .badge-count {
    position: absolute;
    top: 4px;
    right: 4px;
    opacity: 1;
    transform: scale(1);
  }
  
  .badge-dot {
    display: none;
  }
  
  .nav-chevron,
  .submenu-flyout,
  .nav-divider,
  .sidebar-footer {
    display: none;
  }
  
  .main-container {
    margin-left: 0;
    margin-bottom: 64px;
  }
  
  /* Mobile submenu as modal/sheet */
  .mobile-submenu-sheet {
    position: fixed;
    bottom: 64px;
    left: 0;
    right: 0;
    background: white;
    border-top-left-radius: var(--radius-xl);
    border-top-right-radius: var(--radius-xl);
    box-shadow: var(--shadow-2xl);
    padding: var(--space-6);
    max-height: 60vh;
    overflow-y: auto;
    z-index: calc(var(--z-fixed) + 20);
  }
  
  .dark .mobile-submenu-sheet {
    background: var(--dark-bg-secondary);
  }
}

/* ========================================
   TABLET LANDSCAPE
   ======================================== */

@media (min-width: 769px) and (max-width: 1024px) {
  .sidebar-modern {
    width: 60px;
  }
  
  .sidebar-modern.pinned {
    width: 200px;
  }
  
  .sidebar-modern.expanded {
    width: 200px;
  }
}

/* ========================================
   ACCESSIBILITY
   ======================================== */

.nav-link:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: -2px;
}

/* ========================================
   REDUCED MOTION
   ======================================== */

@media (prefers-reduced-motion: reduce) {
  .sidebar-modern,
  .nav-label,
  .logo-text,
  .badge-count,
  .submenu-flyout,
  .nav-chevron,
  .main-container {
    transition: none;
  }
}

/* ========================================
   HIGH CONTRAST MODE
   ======================================== */

@media (prefers-contrast: high) {
  .sidebar-modern {
    border-right-width: 2px;
  }
  
  .nav-link.active {
    border: 2px solid var(--color-primary);
  }
}

/* ========================================
   PRINT STYLES
   ======================================== */

@media print {
  .sidebar-modern {
    display: none;
  }
  
  .main-container {
    margin-left: 0;
  }
}