/* ==========================================
   SIDEBAR NAVIGATION - Modern Left Sidebar
   Inspired by GitHub, Notion, and Linear
   ========================================== */

/* ==========================================
   NOTE: All color variables are defined in palette.css
   This file uses those variables for styling
   ========================================== */

/* ==========================================
   Sidebar Container
   ========================================== */

.sidebar {
  position: fixed;
  top: 52%;
  left: 1rem;
  transform: translateY(-50%);
  width: 17em;
  height: calc(100vh - 3rem);
  max-height: 90vh;
  /* Solid background with blur - uses theme colors */
  background: rgba(var(--sidebar-bg-rgb, 24, 21, 19), 0.98);
  background: rgba(var(--color-primary-rgb), 0.15);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-radius: 10px;
  border-right: 1px solid color-mix(in srgb, var(--color-highlight-peach) 30%, transparent);
  border-left: 1px solid color-mix(in srgb, var(--color-highlight-peach) 30%, transparent);
  border-top: 1px solid color-mix(in srgb, var(--color-highlight-peach) 30%, transparent);
  border-bottom: 1px solid color-mix(in srgb, var(--color-highlight-peach) 30%, transparent);
  display: flex;
  flex-direction: column;
  z-index: 1040;
  transition: transform var(--transition-base), width var(--transition-base), background var(--transition-base);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

/* Subtle texture overlay for construction paper feel */
.sidebar::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    repeating-linear-gradient(
      30deg,
      rgba(255, 255, 255, 0.01) 0px,
      transparent 2px,
      transparent 3px,
      rgba(255, 255, 255, 0.01) 3px
    );
  pointer-events: none;
  z-index: 0;
}

/* Accent glow on the right edge */
.sidebar::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 1px;
  height: 100%;
  background: var(--color-border-strong);
  opacity: 0.4;
  pointer-events: none;
}

.sidebar-inner {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
  position: relative;
  z-index: 1;
}

/* Custom scrollbar for sidebar */
.sidebar .sidebar-inner::-webkit-scrollbar {
  width: 3px !important;
}

.sidebar .sidebar-inner::-webkit-scrollbar-track {
  background: transparent !important;
}

.sidebar .sidebar-inner::-webkit-scrollbar-thumb {
  background: color-mix(in srgb, var(--color-highlight-peach) 40%, transparent) !important;
  border-radius: 3px !important;
  transition: background var(--transition-fast);
}

.sidebar .sidebar-inner::-webkit-scrollbar-thumb:hover {
  background: color-mix(in srgb, var(--color-highlight-peach) 60%, transparent) !important;
}

/* ==========================================
   Sidebar Header
   ========================================== */

.sidebar-header {
  padding: var(--space-6) var(--space-5);
  border-bottom: 1px solid var(--color-border-subtle);
  flex-shrink: 0;
  background: transparent;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  position: relative;
}

.sidebar-header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--color-border-default);
  opacity: 0.5;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  transition: all var(--transition-fast);
  padding: var(--space-2);
  border-radius: var(--radius-lg);
  position: relative;
}


.brand-icon-sidebar {
  width: 36px;
  height: 36px;
  background: var(--color-primary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  box-shadow: var(--shadow-xs);
  transition: all var(--transition-base);
  flex-shrink: 0;
  position: relative;
}

.brand-icon-sidebar::after {
  content: '';
  position: absolute;
  inset: -2px;
  background: var(--color-primary);
  border-radius: var(--radius-lg);
  opacity: 0;
  filter: blur(8px);
  transition: opacity var(--transition-base);
  z-index: -1;
}

.sidebar-brand:hover .brand-icon-sidebar {
  transform: scale(1.05) rotate(3deg);
  box-shadow: var(--shadow-sm);
}

.sidebar-brand:hover .brand-icon-sidebar::after {
  opacity: 0.3;
}

.brand-text-sidebar {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
  white-space: nowrap;
}

/* Brand Logo Box */
.brand-logo-box {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--transition-base);
  background: linear-gradient(135deg, 
    var(--color-highlight-purple) 0%, var(--color-highlight-purple) 25%, 
    var(--color-highlight-pink) 25%, var(--color-highlight-pink) 50%, 
    var(--color-highlight-peach) 50%, var(--color-highlight-peach) 75%, 
    var(--color-highlight-yellow) 75%, var(--color-highlight-yellow) 100%
  );
  box-shadow: var(--shadow-xs);
}

.brand-logo-letter {
  font-family: ui-serif, Georgia, Cambria, "Times New Roman", Times, serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-bg-primary);
  line-height: 1;
  user-select: none;
}

.sidebar-brand:hover .brand-logo-box {
  transform: scale(1.05);
  box-shadow: var(--shadow-sm);
}

/* ==========================================
   Sidebar Navigation
   ========================================== */

.sidebar-nav {
  flex: 1;
  padding: var(--space-4) var(--space-3);
  overflow-y: auto;
  overflow-x: hidden;
  position: relative;
}

/* Subtle gradient overlay at top and bottom for depth */
.sidebar-nav::before,
.sidebar-nav::after {
  content: '';
  position: sticky;
  left: 0;
  right: 0;
  height: 20px;
  pointer-events: none;
  z-index: 10;
}

.sidebar-nav::before {
  top: 0;
  background: var(--color-bg-primary);
}

.sidebar-nav::after {
  bottom: 0;
  background: var(--color-bg-primary);
}

.sidebar-section {
  margin-bottom: var(--space-6);
}

.sidebar-section-title {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: var(--space-2) var(--space-4);
  margin-bottom: var(--space-2);
}

.nav-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.nav-item {
  margin: 0;
  position: relative;
}

/* Drag Handle */
.nav-drag-handle {
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-tertiary);
  cursor: grab;
  opacity: 0;
  transition: all var(--transition-fast);
  z-index: 10;
  font-size: 0.875rem;
  background: rgba(0, 0, 0, 0);
  border-radius: var(--radius-md);
  margin-left: 2px;
}

.nav-item:hover .nav-drag-handle {
  opacity: 1;
}

.nav-drag-handle:hover {
  color: var(--color-text-primary);
}

.nav-drag-handle:active {
  cursor: grabbing;
}

/* Adjust nav-item-link padding to accommodate drag handle */
.draggable-nav-item .nav-item-link {
  padding-left: 34px; /* Make room for drag handle */
}

/* Sortable states for sidebar navigation */
.draggable-nav-item.sortable-ghost {
  opacity: 0.3;
  border-radius: var(--radius-lg);
}

.draggable-nav-item.sortable-ghost .nav-item-link {
  opacity: 0.5;
}

.draggable-nav-item.sortable-chosen {
  opacity: 1;
}

.draggable-nav-item.sortable-chosen .nav-item-link {
  cursor: grabbing;
  box-shadow: var(--shadow-md);
}

.draggable-nav-item.sortable-drag {
  opacity: 1 !important;
}

.draggable-nav-item.sortable-drag .nav-item-link {
  transform: scale(1.02);
  box-shadow: 0 8px 30px rgba(203, 157, 240, 0.3),
              0 0 0 1px var(--color-primary);
  background: var(--color-bg-tertiary);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  cursor: grabbing;
}

.sortable-fallback.draggable-nav-item {
  opacity: 1 !important;
  cursor: grabbing !important;
}

.sortable-fallback.draggable-nav-item .nav-item-link {
  box-shadow: var(--shadow-xl);
  background: var(--color-bg-tertiary);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
}

/* Smooth transitions when not dragging */
.draggable-nav-item:not(.sortable-chosen):not(.sortable-ghost) {
  transition: transform 0.2s ease;
}

/* Prevent text selection during drag */
.draggable-nav-item.sortable-chosen,
.draggable-nav-item.sortable-ghost {
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
}

/* Add cursor feedback when dragging */
.is-dragging-sidebar * {
  cursor: grabbing !important;
}

/* Touch devices optimization */
@media (hover: none) and (pointer: coarse) {
  .nav-drag-handle {
    opacity: 0.6;
    width: 28px;
  }
  
  .draggable-nav-item .nav-item-link {
    padding-left: 38px;
  }
  
  .draggable-nav-item.sortable-drag .nav-item-link {
    transform: scale(1.05);
  }
}

.nav-item-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: var(--color-text-secondary);
  font-weight: 500;
  font-size: 0.9375rem;
  transition: all var(--transition-fast);
  position: relative;
  min-height: 44px;
  overflow: visible;
  border: 1px solid transparent;
}

/* Blur background on hover */
.nav-item-link::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-bg-secondary);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  opacity: 0;
  transition: opacity var(--transition-fast);
  z-index: -1;
  border-radius: var(--radius-lg);
}

/* Gradient border */
.nav-item-link::after {
  content: '';
  position: absolute;
  top: -1px;
  left: -1px;
  right: -1px;
  bottom: -1px;
  background: linear-gradient(135deg, var(--color-highlight-peach), var(--color-highlight-yellow));
  border-radius: var(--radius-lg);
  opacity: 0;
  transition: opacity var(--transition-fast);
  z-index: -2;
}

.nav-item-link:hover {
  color: var(--color-text-primary);
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}

.nav-item-link:hover::before {
  opacity: 1;
}

.nav-item-link:hover::after {
  opacity: 1;
}

.nav-item-link.active {
  color: var(--color-text-primary);
  font-weight: 600;
  box-shadow: var(--shadow-sm),
              inset 0 0 20px rgba(255, 255, 255, 0.02);
}

.nav-item-link.active::before {
  background: var(--color-bg-tertiary);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  opacity: 1;
}

.nav-item-link.active::after {
  opacity: 1;
}

.nav-icon {
  font-size: 1.125rem;
  flex-shrink: 0;
  opacity: 0.8;
  transition: opacity var(--transition-fast);
}

.nav-item-link:hover .nav-icon,
.nav-item-link.active .nav-icon {
  opacity: 1;
}

.nav-text {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ==========================================
   Sidebar Footer
   ========================================== */

.sidebar-footer {
  flex-shrink: 0;
  padding: var(--space-4) var(--space-3);
  border-top: 1px solid var(--color-border-subtle);
  background: var(--color-bg-primary);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  position: relative;
}

.sidebar-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--color-border-default);
  opacity: 0.4;
}

/* User Profile Section */
.sidebar-user {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.user-profile {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  background: var(--color-bg-tertiary);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
  cursor: pointer;
  text-decoration: none;
  color: inherit;
}

.user-profile::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.05);
  transition: left var(--transition-slow);
}

.user-profile:hover {
  border-color: var(--color-border-strong);
  background: var(--color-bg-secondary);
  box-shadow: var(--shadow-sm),
              inset 0 0 30px rgba(0, 0, 0, 0.2);
  transform: translateY(-2px);
}

.user-profile:hover::before {
  left: 100%;
}

.user-avatar-sidebar {
  width: 40px;
  height: 40px;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-bg-primary);
  font-size: 1.5rem;
  flex-shrink: 0;
  box-shadow: var(--shadow-xs);
}

.user-details-sidebar {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
  min-width: 0;
}

.user-name-sidebar {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text-primary);
  line-height: 1.3;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-email-sidebar {
  font-size: 0.75rem;
  color: var(--color-text-tertiary);
  line-height: 1.3;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.btn-sidebar-logout {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-primary);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  color: var(--color-text-tertiary);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  width: 100%;
  text-decoration: none;
  font-family: ui-serif, Georgia, Cambria, "Times New Roman", Times, serif;
  position: relative;
  overflow: hidden;
}

.btn-sidebar-logout::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: var(--color-danger);
  transform: translate(-50%, -50%);
  transition: width var(--transition-base), height var(--transition-base);
  z-index: -1;
}

.btn-sidebar-logout:hover {
  border-color: var(--color-danger);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(239, 68, 68, 0.25),
              var(--shadow-sm);
}

.btn-sidebar-logout:hover::before {
  width: 200%;
  height: 200%;
}

.btn-sidebar-logout i {
  font-size: 1rem;
}

/* Auth Buttons for Non-Logged In Users */
.sidebar-auth {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.btn-sidebar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}

.btn-sidebar-login {
  background: var(--color-bg-tertiary);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-color: rgba(255, 255, 255, 0.1);
  color: var(--color-text-secondary);
  position: relative;
  overflow: hidden;
}

.btn-sidebar-login::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.1);
  transition: left var(--transition-base);
}

.btn-sidebar-login:hover {
  background: var(--color-bg-secondary);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-color: var(--color-border-strong);
  color: var(--color-text-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.btn-sidebar-login:hover::before {
  left: 100%;
}

.btn-sidebar-signup {
  background: var(--color-primary);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: white;
  box-shadow: var(--shadow-xs);
  position: relative;
  overflow: hidden;
}

.btn-sidebar-signup::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: rgba(255, 255, 255, 0.2);
  opacity: 0;
  transition: opacity var(--transition-slow);
  border-radius: 50%;
}

.btn-sidebar-signup:hover {
  background: var(--color-primary-dark);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
  color: white;
}

.btn-sidebar-signup:hover::before {
  opacity: 1;
}

/* ==========================================
   Main Content Adjustment
   ========================================== */

body {
  margin-left: 260px;
  transition: margin-left var(--transition-base);
}

main.container {
  max-width: min(85%, 1320px); /* Responsive width, ~10% wider than 1200px */
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

/* ==========================================
   Mobile Sidebar Toggle
   ========================================== */

.sidebar-toggle-mobile {
  position: fixed;
  top: var(--space-4);
  left: var(--space-4);
  width: 48px;
  height: 48px;
  background: var(--color-bg-primary);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1050;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.5),
              var(--shadow-md);
}

.sidebar-toggle-mobile:hover {
  background: var(--color-bg-secondary);
  border-color: var(--color-border-strong);
  transform: scale(1.05);
  box-shadow: var(--shadow-lg);
}

.sidebar-toggle-mobile:active {
  transform: scale(0.95);
}

.toggle-icon {
  display: flex;
  flex-direction: column;
  width: 20px;
  height: 16px;
  justify-content: space-between;
}

.toggle-icon span {
  display: block;
  height: 2px;
  width: 100%;
  background-color: var(--color-text-secondary);
  border-radius: 1px;
  transition: all var(--transition-base);
}

.sidebar-open .toggle-icon span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.sidebar-open .toggle-icon span:nth-child(2) {
  opacity: 0;
}

.sidebar-open .toggle-icon span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

/* Sidebar Overlay (for mobile) */
.sidebar-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 1035;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

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

/* ==========================================
   Tablet and Below (< 992px)
   ========================================== */

@media (max-width: 991.98px) {
  /* Hide sidebar by default on tablet/mobile */
  .sidebar {
    transform: translate(-100%, -50%);
    box-shadow: none;
  }
  
  /* Show sidebar when open with enhanced blur */
  .sidebar-open .sidebar {
    transform: translate(0, -50%);
    box-shadow: 0 0 50px rgba(0, 0, 0, 0.7),
                0 20px 60px rgba(0, 0, 0, 0.5),
                var(--shadow-xl);
  }
  
  /* Remove body margin on mobile */
  body {
    margin-left: 0;
  }
  
  /* Show mobile toggle button */
  .sidebar-toggle-mobile {
    display: flex;
  }
  
  /* Adjust main content */
  main.container {
    padding-left: var(--space-6);
    padding-right: var(--space-6);
  }
}

/* ==========================================
   Mobile Specific (< 768px)
   ========================================== */

@media (max-width: 767.98px) {
  .sidebar {
    width: 280px;
  }
  
  .sidebar-toggle-mobile {
    top: var(--space-3);
    left: var(--space-3);
    width: 44px;
    height: 44px;
  }
  
  main.container {
    padding-left: var(--space-4);
    padding-right: var(--space-4);
    margin-top: 60px;
  }
  
  /* Ensure sidebar header is visible with mobile toggle */
  .sidebar-header {
    padding-top: var(--space-8);
  }
}

/* ==========================================
   Small Mobile (< 480px)
   ========================================== */

@media (max-width: 479.98px) {
  .sidebar {
    width: 100%;
    max-width: 320px;
  }
  
  main.container {
    padding-left: var(--space-3);
    padding-right: var(--space-3);
  }
  
  .user-email-sidebar {
    display: none;
  }
}

/* ==========================================
   Sidebar Animations
   ========================================== */

@keyframes slideInFromLeft {
  from {
    transform: translate(-100%, -50%);
    opacity: 0;
  }
  to {
    transform: translate(0, -50%);
    opacity: 1;
  }
}

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

@keyframes glowPulse {
  0%, 100% {
    box-shadow: 0 0 5px rgba(203, 157, 240, 0.3),
                var(--shadow-xs);
  }
  50% {
    box-shadow: 0 0 5px rgba(203, 157, 240, 0.5),
                var(--shadow-sm);
  }
}

.sidebar-open .sidebar {
  animation: slideInFromLeft var(--transition-base) ease-out;
}

.nav-item-link.active {
  animation: fadeIn var(--transition-base) ease-in;
}

.brand-icon-sidebar {
  animation: glowPulse 3s ease-in-out infinite;
}

/* ==========================================
   Accessibility
   ========================================== */

.sidebar-toggle-mobile:focus-visible,
.nav-item-link:focus-visible,
.btn-sidebar:focus-visible,
.btn-sidebar-logout:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Skip to content link for keyboard navigation */


/* ==========================================
   Hover States (Desktop Only)
   ========================================== */

@media (hover: hover) and (pointer: fine) {
  .nav-item-link:hover {
    background: var(--color-bg-tertiary);
  }

}

/* ==========================================
   Print Styles
   ========================================== */

@media print {
  .sidebar,
  .sidebar-toggle-mobile,
  .sidebar-overlay {
    display: none !important;
  }
  
  body {
    margin-left: 0 !important;
  }
}

/* ==========================================
   Dark Mode Enhancements
   ========================================== */

@media (prefers-color-scheme: dark) {
  .sidebar {
    background: var(--color-bg-primary);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
  }
  
  .sidebar-footer {
    background: var(--color-bg-primary);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
  }
  
  .user-profile {
    background: var(--color-bg-secondary);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
  }
}

/* ==========================================
   Reduced Motion Support
   ========================================== */

@media (prefers-reduced-motion: reduce) {
  .sidebar,
  .sidebar-overlay,
  .nav-item-link,
  .btn-sidebar,
  .toggle-icon span {
    transition: none !important;
    animation: none !important;
  }
}