/* ===================================
   SIDEBAR NAVIGATION - MODERN LAYOUT
   =================================== */

/* Variables */
:root {
  --sidebar-width-expanded: 260px;
  --sidebar-width-collapsed: 64px;
  --topbar-height: 64px;
  --transition-speed: 0.3s;
  --primary-color: #3B82F6;
  --secondary-color: #6366F1;
  --hover-bg: #F3F4F6;
  --active-bg: #EFF6FF;
  --active-border: #3B82F6;
}

/* ===================================
   LAYOUT STRUCTURE
   =================================== */

/* App Container with Sidebar */
.app-with-sidebar {
  display: flex;
  min-height: 100vh;
  background: #F9FAFB;
}

/* Main Content Area */
.main-content-wrapper {
  flex: 1;
  display: flex;
  flex-direction: column;
  margin-left: var(--sidebar-width-expanded);
  transition: margin-left var(--transition-speed) ease;
}

.main-content-wrapper.sidebar-collapsed {
  margin-left: var(--sidebar-width-collapsed);
}

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

.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--sidebar-width-expanded);
  background: white;
  box-shadow: 2px 0 8px rgba(0, 0, 0, 0.05);
  display: flex;
  flex-direction: column;
  transition: width var(--transition-speed) ease, transform var(--transition-speed) ease;
  z-index: 1000;
  overflow: hidden;
}

.sidebar.collapsed {
  width: var(--sidebar-width-collapsed);
}

/* Sidebar Header */
.sidebar-header {
  height: var(--topbar-height);
  padding: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid #E5E7EB;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: white;
  transition: opacity var(--transition-speed) ease;
}

.sidebar-logo-icon {
  font-size: 1.75rem;
  min-width: 32px;
  text-align: center;
}

.sidebar-logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  white-space: nowrap;
  opacity: 1;
  transition: opacity var(--transition-speed) ease;
}

.sidebar.collapsed .sidebar-logo-text {
  opacity: 0;
  width: 0;
}

.sidebar.collapsed .sidebar-logo-icon {
  opacity: 0;
  width: 0;
  overflow: hidden;
}

.sidebar-toggle-btn {
  background: rgba(255, 255, 255, 0.2);
  border: none;
  color: white;
  width: 32px;
  height: 32px;
  border-radius: 6px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  font-size: 1rem;
}

.sidebar-toggle-btn:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: scale(1.05);
}

.sidebar.collapsed .sidebar-toggle-btn i {
  transform: rotate(180deg);
}

/* Sidebar Content */
.sidebar-content {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 1rem 0;
}

.sidebar-content::-webkit-scrollbar {
  width: 6px;
}

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

.sidebar-content::-webkit-scrollbar-thumb {
  background: #D1D5DB;
  border-radius: 3px;
}

.sidebar-content::-webkit-scrollbar-thumb:hover {
  background: #9CA3AF;
}

/* ===================================
   MENU GROUPS
   =================================== */

.menu-group {
  margin-bottom: 1.5rem;
}

.menu-group-header {
  padding: 0.5rem 1rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: #6B7280;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: opacity var(--transition-speed) ease;
}

.sidebar.collapsed .menu-group-header {
  opacity: 0;
  height: 0;
  padding: 0;
  margin: 0;
  overflow: hidden;
}

.menu-group-icon {
  font-size: 0.875rem;
}

/* ===================================
   MENU ITEMS
   =================================== */

.menu-item {
  position: relative;
  display: flex;
  align-items: center;
  padding: 0.75rem 1rem;
  color: #4B5563;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
  border-left: 3px solid transparent;
  gap: 0.75rem;
  font-size: 0.875rem;
}

.menu-item:hover {
  background: var(--hover-bg);
  color: var(--primary-color);
}

.menu-item.active {
  background: var(--active-bg);
  color: var(--primary-color);
  border-left-color: var(--active-border);
  font-weight: 600;
}

.menu-item-icon {
  font-size: 1.25rem;
  min-width: 24px;
  text-align: center;
  transition: transform 0.2s ease;
}

.menu-item:hover .menu-item-icon {
  transform: scale(1.1);
}

.menu-item-text {
  flex: 1;
  white-space: nowrap;
  opacity: 1;
  transition: opacity var(--transition-speed) ease;
}

.sidebar.collapsed .menu-item-text {
  opacity: 0;
  width: 0;
}

.menu-item-badge {
  background: #EF4444;
  color: white;
  font-size: 0.625rem;
  font-weight: 700;
  padding: 0.125rem 0.375rem;
  border-radius: 9999px;
  min-width: 18px;
  text-align: center;
  transition: opacity var(--transition-speed) ease;
}

.sidebar.collapsed .menu-item-badge {
  opacity: 0;
  width: 0;
}

.menu-item-new {
  background: #3B82F6;
  color: white;
  font-size: 0.625rem;
  font-weight: 700;
  padding: 0.125rem 0.5rem;
  border-radius: 4px;
  text-transform: uppercase;
  transition: opacity var(--transition-speed) ease;
}

.sidebar.collapsed .menu-item-new {
  opacity: 0;
  width: 0;
}

/* Submenu Items */
.menu-item.submenu-item {
  padding-left: 3rem;
  font-size: 0.8125rem;
}

.sidebar.collapsed .menu-item.submenu-item {
  padding-left: 1rem;
}

/* ===================================
   SUBMENU / COLLAPSIBLE
   =================================== */

.menu-item-with-submenu {
  cursor: pointer;
}

.menu-item-arrow {
  font-size: 0.75rem;
  transition: transform 0.2s ease, opacity var(--transition-speed) ease;
}

.menu-item-with-submenu.expanded .menu-item-arrow {
  transform: rotate(90deg);
}

.sidebar.collapsed .menu-item-arrow {
  opacity: 0;
  width: 0;
}

.submenu {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.submenu.expanded {
  max-height: 500px;
}

.sidebar.collapsed .submenu {
  display: none;
}

/* ===================================
   TOOLTIP (for collapsed state)
   =================================== */

.sidebar.collapsed .menu-item {
  position: relative;
  justify-content: center;
}

.sidebar.collapsed .menu-item::after {
  content: attr(data-tooltip);
  position: absolute;
  left: calc(100% + 0.5rem);
  background: #1F2937;
  color: white;
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  font-size: 0.875rem;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
  z-index: 1001;
}

.sidebar.collapsed .menu-item:hover::after {
  opacity: 1;
}

/* ===================================
   TOP BAR
   =================================== */

.top-bar {
  height: var(--topbar-height);
  background: white;
  border-bottom: 1px solid #E5E7EB;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.top-bar-left {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.company-logo {
  height: 40px;
  max-width: 200px;
  object-fit: contain;
}

.company-name {
  font-size: 1.25rem;
  font-weight: 700;
  color: #1F2937;
}

.top-bar-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.app-switcher {
  padding: 0.5rem 1rem;
  border-radius: 8px;
  background: var(--primary-color);
  color: white;
  border: none;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.875rem;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.app-switcher:hover {
  background: var(--secondary-color);
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
}

.user-menu {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.2s ease;
}

.user-menu:hover {
  background: var(--hover-bg);
}

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.875rem;
}

.user-info {
  display: flex;
  flex-direction: column;
}

.user-name {
  font-size: 0.875rem;
  font-weight: 600;
  color: #1F2937;
}

.user-role {
  font-size: 0.75rem;
  color: #6B7280;
}

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

.main-content {
  flex: 1;
  padding: 2rem;
  overflow-y: auto;
}

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

/* Tablet */
@media (max-width: 1024px) {
  .sidebar {
    transform: translateX(-100%);
  }
  
  .sidebar.mobile-open {
    transform: translateX(0);
  }
  
  .main-content-wrapper {
    margin-left: 0 !important;
  }
  
  .sidebar-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    display: none;
  }
  
  .sidebar-backdrop.active {
    display: block;
  }
}

/* Mobile */
@media (max-width: 768px) {
  /* Mobile Menu Overlay Button - Fixed Position */
  .mobile-menu-overlay-btn {
    position: fixed;
    top: 0.5rem;
    left: 0.5rem;
    z-index: 1000;
    background: #3B82F6;
    color: white;
    width: 44px;
    height: 44px;
    border: 2px solid white;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    font-size: 1.25rem;
  }
  
  .mobile-menu-overlay-btn:hover {
    background: #2563EB;
    transform: scale(1.05);
  }
  
  .mobile-menu-overlay-btn:active {
    transform: scale(0.95);
  }
  
  .top-bar {
    padding: 0 1rem;
  }
  
  .top-bar-left {
    gap: 0.5rem;
    padding-left: 3rem; /* Platz für den Overlay Button */
  }
  
  .company-name {
    font-size: 1rem;
  }
  
  .user-info {
    display: none;
  }
  
  .main-content {
    padding: 1rem;
    padding-bottom: 80px; /* Space for bottom nav */
  }
}

/* ===================================
   ANIMATIONS
   =================================== */

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

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

.sidebar.mobile-open {
  animation: slideInFromLeft 0.3s ease;
}

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

.hidden {
  display: none !important;
}

.text-center {
  text-align: center;
}

.font-bold {
  font-weight: 700;
}

.text-sm {
  font-size: 0.875rem;
}

.text-xs {
  font-size: 0.75rem;
}