/**
 * Aufgabengenerator - Shared Components
 * Common components, buttons, forms, sidebar, layout
 */

/* ===== ACCESSIBILITY ===== */
/* Screen-reader only text (versteckt visuell, aber für Screenreader verfügbar) */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Skip-to-content Link für Keyboard-Navigation */
.skip-to-content {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--primary);
  color: white;
  padding: var(--spacing-sm) var(--spacing-md);
  text-decoration: none;
  z-index: 9999;
  border-radius: 0 0 var(--radius) 0;
}

.skip-to-content:focus {
  top: 0;
}

/* Verbesserte Focus-Styles für Keyboard-Navigation */
*:focus {
  outline: 2px solid var(--primary, #007bff);
  outline-offset: 2px;
}

/* Focus-visible für moderne Browser (nur bei Keyboard, nicht bei Maus) */
*:focus:not(:focus-visible) {
  outline: none;
}

*:focus-visible {
  outline: 2px solid var(--primary, #007bff);
  outline-offset: 2px;
}

/* ===== GLOBAL APP HEADER ===== */
.app-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height, 56px);
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-default);
  display: flex;
  align-items: center;
  padding: 0 var(--spacing-md);
  z-index: 200;
}

/* Logo Link */
.header-logo-link {
  display: flex;
  align-items: center;
  height: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  text-decoration: none;
  flex-shrink: 0;
}

.header-logo {
  height: 32px;
  width: auto;
}

/* Spacer - pushes controls to right */
.header-spacer {
  flex: 1;
}

/* Controls container */
.header-controls {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  flex-shrink: 0;
}

/* Theme Toggle Button */
.header-theme-btn {
  width: 36px;
  height: 36px;
  background: transparent;
  border: 1px solid var(--border-default);
  border-radius: var(--radius);
  cursor: pointer;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.header-theme-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.header-theme-btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* Show sun in dark mode, moon in light mode */
.theme-icon-light {
  display: flex;
}

.theme-icon-dark {
  display: none;
}

[data-theme="dark"] .theme-icon-light {
  display: none;
}

[data-theme="dark"] .theme-icon-dark {
  display: flex;
}

/* Backend Status */
.header-status {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--bg-subtle);
  border-radius: var(--radius);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--danger);
  flex-shrink: 0;
}

.header-status.online .status-dot {
  background: var(--success);
}

.status-label {
  font-weight: 500;
}

/* Version Badge */
.header-version {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--bg-subtle);
  border-radius: var(--radius);
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

/* ===== ADMIN ROLE SWITCHER ===== */
.header-user-menu {
  position: relative;
}

.header-role-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--bg-subtle);
  border: 1px solid var(--border-default);
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-primary);
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.header-role-btn:hover {
  background: var(--bg-hover);
  border-color: var(--primary);
}

.header-role-btn svg {
  transition: transform 0.15s ease;
}

.header-role-btn[aria-expanded="true"] svg {
  transform: rotate(180deg);
}

/* Dropdown Menu */
.header-role-dropdown {
  position: absolute;
  top: calc(100% + var(--spacing-xs));
  right: 0;
  min-width: 200px;
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  z-index: 300;
  padding: var(--spacing-xs) 0;
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 0.9rem;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.1s ease;
}

.dropdown-item:hover {
  background: var(--bg-hover);
}

.dropdown-item.active {
  color: var(--primary);
  font-weight: 500;
}

.dropdown-item svg {
  color: var(--text-muted);
  flex-shrink: 0;
}

.dropdown-divider {
  height: 1px;
  margin: var(--spacing-xs) 0;
  background: var(--border-default);
}

/* Impersonation Badge */
.header-impersonate-badge {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--warning-bg, #fef3c7);
  border: 1px solid var(--warning, #f59e0b);
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--warning-text, #92400e);
}

[data-theme="dark"] .header-impersonate-badge {
  background: var(--warning-bg, rgba(245, 158, 11, 0.15));
  color: var(--warning, #fbbf24);
}

.header-impersonate-end {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  padding: 0;
  margin-left: var(--spacing-xs);
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  color: inherit;
  cursor: pointer;
  opacity: 0.7;
  transition: opacity 0.1s ease, background-color 0.1s ease;
}

.header-impersonate-end:hover {
  opacity: 1;
  background: rgba(0, 0, 0, 0.1);
}

/* ===== IMPERSONATE MODAL ===== */
/* .modal-overlay, .modal-content, .modal-header etc. are defined in MODAL section below */

/* Student List in Modal */
.student-list {
  margin-top: var(--spacing-md);
  max-height: 300px;
  overflow-y: auto;
  border: 1px solid var(--border-default);
  border-radius: var(--radius);
}

.student-list .loading,
.student-list .empty,
.student-list .error {
  padding: var(--spacing-lg);
  text-align: center;
  color: var(--text-muted);
}

.student-list .error {
  color: var(--danger);
}

.student-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  background: none;
  border: none;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-primary);
  font-size: 0.9rem;
  cursor: pointer;
  transition: background-color 0.1s ease;
  text-align: left;
}

.student-item:last-child {
  border-bottom: none;
}

.student-item:hover {
  background: var(--bg-hover);
}

.student-name {
  font-weight: 500;
}

.student-class {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Legacy class names for backward compatibility */
.app-logo {
  display: flex;
  align-items: center;
  height: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  text-decoration: none;
}

.app-logo img {
  height: 32px;
  width: auto;
}

.app-header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.app-header .backend-status {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.app-header .backend-status .indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--danger);
}

.app-header .backend-status.online .indicator {
  background: var(--success);
}

.app-header .app-version {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--bg-subtle);
  border-radius: var(--radius);
}

/* ===== LAYOUT MIT SIDEBAR ===== */
:root {
  --sidebar-width: 260px;
  --sidebar-width-collapsed: 60px;
  --header-height: 56px;
  --ease-smooth: cubic-bezier(0.25, 0.1, 0.25, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

.app-layout {
  display: flex;
  min-height: 100vh;
  padding-top: var(--header-height);
}

/* ===== SIDEBAR - Clean Flat with Depth ===== */
.sidebar {
  position: fixed;
  top: var(--header-height);
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--sidebar-bg);
  border-right: 1px solid var(--sidebar-border);
  box-shadow: 2px 0 8px -4px rgba(0, 0, 0, 0.08);
  display: flex;
  flex-direction: column;
  z-index: 100;
  transition: width 0.3s var(--ease-smooth);
  overflow: hidden;
}

[data-theme="dark"] .sidebar {
  box-shadow: 2px 0 12px -4px rgba(0, 0, 0, 0.25);
}

/* Navigation Container */
.sidebar-nav {
  flex: 1;
  padding: var(--spacing-md);
  overflow-y: auto;
  overflow-x: hidden;
}

/* Close button - hidden on desktop, shown on mobile via @media */
.sidebar-close-btn {
  display: none;
}

/* ===== NAV SECTION ===== */
.nav-section {
  margin-bottom: var(--spacing-lg);
}

.nav-section + .nav-section {
  border-top: 1px solid var(--border-subtle);
  padding-top: var(--spacing-md);
}

/* Section Header - Toggle INLINE with Title */
.nav-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
  min-height: 24px;
}

.nav-section-title {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  transition: opacity 0.2s ease;
}

/* Toggle Button - Inline with Title */
.nav-section-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  padding: 0;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm, 4px);
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.15s ease;
  flex-shrink: 0;
}

.nav-section-toggle:hover {
  background: var(--sidebar-hover);
  color: var(--text-primary);
}

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

.nav-section-toggle svg {
  width: 16px;
  height: 16px;
}

/* ===== NAV LINKS ===== */
.nav-link {
  position: relative;
  display: flex;
  align-items: center;
  padding: 10px 12px;
  border-radius: var(--radius);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: background-color 0.15s ease, color 0.15s ease;
  min-height: 40px;
}

.nav-link:hover {
  background: var(--sidebar-hover);
  color: var(--text-primary);
}

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

/* ===== ACTIVE STATE with Indicator Bar ===== */
.nav-link.active {
  background: var(--sidebar-active);
  color: var(--primary);
  font-weight: 500;
}

/* Active Indicator Bar - left side */
.nav-link.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 20px;
  background: var(--primary);
  border-radius: 0 3px 3px 0;
  animation: indicatorSlide 0.2s var(--ease-spring);
}

@keyframes indicatorSlide {
  from { transform: translateY(-50%) scaleY(0); }
  to { transform: translateY(-50%) scaleY(1); }
}

/* ===== ICON CONTAINER - Pixel-perfect alignment ===== */
.nav-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-icon svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
}

/* Label */
.nav-label {
  margin-left: 12px;
  white-space: nowrap;
  overflow: hidden;
  transition: opacity 0.2s ease, margin 0.2s ease, width 0.25s ease;
}

/* Chevron for expandable items */
.nav-link > svg:last-child {
  margin-left: auto;
  width: 16px;
  height: 16px;
  opacity: 0.5;
  transition: transform 0.2s ease;
}

.nav-link.active > svg:last-child {
  transform: rotate(180deg);
}

/* ===== SUB-NAVIGATION ===== */
.nav-sub-items {
  display: flex;
  flex-direction: column;
  margin-left: 32px;
  margin-top: 4px;
  margin-bottom: 8px;
  border-left: 2px solid var(--border-subtle);
  padding-left: 12px;
}

.nav-sub-link {
  display: flex;
  align-items: center;
  padding: 8px 12px;
  color: var(--text-muted);
  text-decoration: none;
  border-radius: var(--radius-sm, 4px);
  font-size: 0.85rem;
  transition: all 0.15s ease;
}

.nav-sub-link:hover {
  background: var(--sidebar-hover);
  color: var(--text-primary);
}

.nav-sub-link.active {
  background: var(--sidebar-active);
  color: var(--primary);
  font-weight: 500;
}

/* Sub-navigation icons */
.nav-sub-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-right: 8px;
}

.nav-sub-icon svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
}

/* Disabled state for backend-required items */
.nav-link.disabled,
.nav-link[data-requires-backend].disabled,
.nav-sub-link[data-requires-backend].disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* ===== COLLAPSED STATE ===== */
.sidebar.collapsed {
  width: var(--sidebar-width-collapsed);
  overflow: visible;
}

/* Section Header in collapsed state */
.sidebar.collapsed .nav-section-header {
  justify-content: center;
}

.sidebar.collapsed .nav-section-title {
  opacity: 0;
  width: 0;
  overflow: hidden;
}

/* Toggle button centered when collapsed */
.sidebar.collapsed .nav-section-toggle {
  margin: 0;
}

/* Nav Links centered */
.sidebar.collapsed .nav-link {
  justify-content: center;
  padding: 10px;
}

.sidebar.collapsed .nav-label,
.sidebar.collapsed .nav-link > svg:last-child {
  opacity: 0;
  width: 0;
  margin: 0;
  overflow: hidden;
}

/* Active Bar in collapsed state - horizontal line UNDER icon */
.sidebar.collapsed .nav-link.active::before {
  left: 50%;
  transform: translateX(-50%);
  top: auto;
  bottom: 4px;
  width: 20px;
  height: 3px;
  border-radius: 3px;
  animation: indicatorSlideCollapsed 0.2s var(--ease-spring);
}

@keyframes indicatorSlideCollapsed {
  from { transform: translateX(-50%) scaleX(0); }
  to { transform: translateX(-50%) scaleX(1); }
}

/* Sub-items as flyout in collapsed mode */
.sidebar.collapsed .nav-sub-items {
  display: none;
  position: absolute;
  left: 100%;
  top: 0;
  background: var(--bg-elevated);
  border: 1px solid var(--border-default);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-xs);
  min-width: 180px;
  z-index: 1000;
  margin: 0;
  border-left: none;
}

.sidebar.collapsed .nav-link:hover + .nav-sub-items,
.sidebar.collapsed .nav-sub-items:hover {
  display: flex;
  flex-direction: column;
}

/* ===== TOOLTIPS (Collapsed) ===== */
.sidebar.collapsed .nav-link[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  left: calc(100% + 12px);
  top: 50%;
  transform: translateY(-50%) translateX(-4px);
  background: var(--bg-elevated);
  color: var(--text-primary);
  padding: 8px 12px;
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-weight: 400;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-default);
  z-index: 1000;
  transition: opacity 0.15s ease, transform 0.15s var(--ease-spring);
}

.sidebar.collapsed .nav-link:hover[data-tooltip]::after {
  opacity: 1;
  transform: translateY(-50%) translateX(0);
}

/* Hide tooltip when flyout menu is visible */
.sidebar.collapsed .nav-link:hover + .nav-sub-items ~ .nav-link::after,
.sidebar.collapsed .nav-sub-items:hover ~ .nav-link::after {
  opacity: 0;
}

/* ===== MAIN CONTENT MARGIN ===== */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-height: calc(100vh - var(--header-height));
  transition: margin-left 0.3s var(--ease-smooth);
}

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

/* ===== SECTION HEADER (Page content) ===== */
.section-header {
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 2px solid var(--border-default);
}

.section-header h2 {
  margin: 0;
  font-size: 1.5rem;
  color: var(--text-primary);
}

/* ===== REDUCED MOTION ===== */
@media (prefers-reduced-motion: reduce) {
  .sidebar,
  .nav-link,
  .nav-label,
  .nav-link::before,
  .nav-section-toggle,
  .sidebar.collapsed .nav-link::after,
  .main-content {
    transition: none !important;
    animation: none !important;
  }
}

/* ===== THEME TOGGLE ===== */
.theme-toggle {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

.theme-toggle-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--bg-subtle, var(--chip-bg));
  border: 1px solid var(--border-default, var(--border));
  border-radius: var(--radius);
  cursor: pointer;
  color: var(--text-muted, var(--fg-muted));
  transition: all 0.2s ease;
  padding: 0;
}

.theme-toggle-btn:hover {
  background: var(--bg-hover, var(--chip-bg));
  color: var(--text-primary, var(--fg));
  border-color: var(--border-strong, var(--border-dark));
}

.theme-toggle-btn svg {
  width: 18px;
  height: 18px;
}

.theme-toggle-btn .icon-sun {
  display: block;
}

.theme-toggle-btn .icon-moon {
  display: none;
}

[data-theme="dark"] .theme-toggle-btn .icon-sun {
  display: none;
}

[data-theme="dark"] .theme-toggle-btn .icon-moon {
  display: block;
}

.theme-toggle-label {
  font-size: 0.8rem;
  color: var(--text-muted, var(--fg-muted));
}

/* Content Header (innerhalb von main-content, optional für zusätzliche Infos) */
.content-header {
  background: var(--bg-white);
  border-bottom: 1px solid var(--border);
  padding: var(--spacing-md) var(--spacing-xl);
  display: none; /* Optional - Seitentitel jetzt im App-Header */
}

.content-header h1 {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0 0 var(--spacing-xs);
  color: var(--fg);
}

.content-header .subtitle {
  color: var(--fg-muted);
  margin: 0;
  font-size: 0.95rem;
}

.content-body {
  padding: var(--spacing-xl) var(--spacing-2xl, 48px);
  max-width: 1200px;
}

/* Mobile Navigation */
.mobile-header {
  display: none;
  background: var(--bg-white);
  border-bottom: 1px solid var(--border);
  padding: var(--spacing-md);
  position: sticky;
  top: 0;
  z-index: 100;
}

.mobile-menu-btn {
  background: none;
  border: none;
  padding: var(--spacing-sm);
  cursor: pointer;
  color: var(--fg);
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 99;
}

/* ===== CARDS & SECTIONS ===== */
.card {
  position: relative;
  overflow: hidden;
  background: var(--bg-card, var(--bg-white));
  border: 1px solid var(--border-default, var(--border));
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--duration-normal, 0.2s) var(--ease-out, ease),
              border-color var(--duration-normal, 0.2s) ease,
              transform var(--duration-normal, 0.2s) var(--ease-out, ease);
}

/* Gradient top-border on hover */
.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary) 0%, var(--primary-light) 50%, transparent 100%);
  opacity: 0;
  transition: opacity var(--duration-normal, 0.2s) ease;
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card:hover::before {
  opacity: 1;
}

.card:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 4px;
  box-shadow: 0 0 0 4px var(--primary-bg);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--border);
}

.card-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.card-title svg {
  width: 20px;
  height: 20px;
  color: var(--primary);
}

section {
  margin-bottom: var(--spacing-lg);
}

fieldset {
  border: none;
  margin: 0;
  padding: 0;
}

legend {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  padding: 0;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--duration-normal, 0.2s) var(--ease-out, ease);
  white-space: nowrap;
  box-shadow: var(--shadow-xs);
}

.btn:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn:active:not(:disabled) {
  transform: translateY(0) scale(0.98);
  box-shadow: var(--shadow-xs);
}

.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--primary-bg), 0 0 0 5px var(--primary);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  box-shadow: none;
}

.btn svg {
  width: 18px;
  height: 18px;
}

/* Button Varianten */
.btn-primary {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

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

.btn-secondary {
  background: var(--bg-card, var(--bg-white));
  color: var(--text-primary, var(--fg));
  border-color: var(--border-strong, var(--border-dark));
}

.btn-secondary:hover:not(:disabled) {
  background: var(--bg-hover, var(--chip-bg));
  border-color: var(--border-strong, var(--border-dark));
}

.btn-success {
  background: var(--success);
  color: white;
  border-color: var(--success);
}

.btn-danger {
  background: var(--danger);
  color: white;
  border-color: var(--danger);
}

.btn-danger:hover {
  background: var(--danger);
  filter: brightness(0.85);
}

.btn-xs {
  padding: 0.2rem 0.4rem;
  font-size: 0.75rem;
  line-height: 1.2;
}

.btn-sm {
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: 0.875rem;
}

.btn-lg {
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: 1rem;
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

/* ===== FORMULARE ===== */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
}

label {
  display: block;
  font-weight: 500;
  margin-bottom: var(--spacing-xs);
  color: var(--fg);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="date"],
input[type="url"],
textarea,
select {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 1rem;
  font-family: inherit;
  border: 1px solid var(--border-strong, var(--border-dark));
  border-radius: var(--radius);
  background: var(--bg-card, var(--bg-white));
  color: var(--text-primary, var(--fg));
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-bg);
}

input:disabled,
textarea:disabled,
select:disabled {
  background: var(--bg-subtle, var(--chip-bg));
  cursor: not-allowed;
  opacity: 0.7;
}

input.readonly,
textarea.readonly {
  background: var(--bg-subtle, var(--chip-bg));
}

textarea {
  min-height: 120px;
  resize: vertical;
}

.form-helper {
  font-size: 0.875rem;
  color: var(--fg-muted);
  margin-top: var(--spacing-xs);
}

.form-error {
  font-size: 0.875rem;
  color: var(--danger);
  margin-top: var(--spacing-xs);
}

/* Checkbox & Radio */
.checkbox-label,
.radio-label {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
  cursor: pointer;
  font-weight: normal;
}

.checkbox-label input,
.radio-label input {
  width: auto;
  margin-top: 3px;
}

/* ===== LOGIN DIVIDER ===== */
.login-divider {
  display: flex;
  align-items: center;
  margin: 1rem 0;
  color: var(--text-muted);
}
.login-divider::before,
.login-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}
.login-divider span {
  padding: 0 1rem;
  font-size: 0.875rem;
}

/* ===== STATUS & ALERTS ===== */
.status {
  margin-top: var(--spacing-sm);
  font-size: 0.95rem;
}

.status.ok {
  color: var(--success);
}

.status.err {
  color: var(--danger);
  white-space: pre-wrap;
}

.alert {
  padding: var(--spacing-md);
  border-radius: var(--radius);
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
}

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

.alert-info {
  background: var(--primary-bg);
  border: 1px solid var(--primary);
  color: var(--primary-dark);
}

.alert-success {
  background: var(--success-bg);
  border: 1px solid var(--success-border);
  color: var(--success);
}

.alert-warning {
  background: var(--warning-bg);
  border: 1px solid var(--warning);
  color: var(--warning);
}

.alert-danger {
  background: var(--danger-bg);
  border: 1px solid var(--danger-border);
  color: var(--danger);
}

/* ===== TABELLEN ===== */
.table-wrapper {
  overflow-x: auto;
  margin-bottom: var(--spacing-md);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

th, td {
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--border);
}

th {
  background: var(--chip-bg);
  font-weight: 600;
  white-space: nowrap;
}

tr:hover td {
  background: var(--chip-bg);
}

/* ===== DATA TABLE ===== */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.data-table th,
.data-table td {
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.data-table th {
  background: var(--chip-bg);
  font-weight: 600;
  white-space: nowrap;
}

.data-table tbody tr:hover {
  background: var(--primary-bg);
}

.data-table code {
  font-size: 0.85em;
  background: var(--chip-bg);
  padding: 0.1rem 0.3rem;
  border-radius: 3px;
}

/* Sortierbare Spalten */
.data-table th.sortable {
  cursor: pointer;
  user-select: none;
  transition: background 0.15s ease;
}

.data-table th.sortable:hover {
  background: var(--bg-muted);
}

.data-table th.sortable .sort-icon {
  display: inline-block;
  margin-left: 0.25rem;
  opacity: 0.4;
  font-size: 0.75em;
  vertical-align: middle;
}

.data-table th.sortable.sort-active .sort-icon {
  opacity: 1;
}

/* Passwort-Anzeige */
.password-visible {
  font-family: var(--font-mono);
  background: var(--chip-bg);
  padding: 0.15rem 0.4rem;
  border-radius: 3px;
  user-select: all;
}

/* ===== API KEYS ===== */
.api-keys-list {
  margin-bottom: 1rem;
}
.api-key-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.api-key-row:last-child {
  border-bottom: none;
}
.api-key-row .api-key-label {
  flex: 1;
  min-width: 100px;
}
.api-key-row .api-key-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  white-space: nowrap;
}
.api-key-row .api-key-status {
  font-size: 0.8rem;
  font-weight: 600;
}
.api-key-row .api-key-status.active {
  color: var(--success);
}
.api-key-row .api-key-status.disabled {
  color: var(--text-muted);
}

/* ===== LOADING ===== */
.loading {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--fg-muted);
}

.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.generating-spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  margin: 0 auto 1rem;
  animation: spin 1s linear infinite !important;
}

/* ===== MODAL ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: var(--spacing-md);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* Alternative Modal-Display mit inline style */
.modal-overlay[style*="display: flex"],
.modal-overlay[style*="display:flex"] {
  opacity: 1;
  visibility: visible;
}

/* Modal-Backdrop für Fallback-Dialoge (z.B. Prompt-Generator) */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  padding: var(--spacing-md);
}

.modal-backdrop.active,
.modal-backdrop[style*="display: flex"],
.modal-backdrop[style*="display:flex"] {
  display: flex;
}

.modal,
.modal-content {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  max-width: 500px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-2xl);
}

.modal-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0;
}

.modal-close {
  background: none;
  border: none;
  padding: var(--spacing-sm);
  cursor: pointer;
  color: var(--fg-muted);
  border-radius: var(--radius);
}

.modal-close:hover {
  background: var(--chip-bg);
  color: var(--fg);
}

.modal-body {
  padding: var(--spacing-lg);
}

.modal-footer {
  padding: var(--spacing-lg);
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: var(--spacing-sm);
}

#feedbackModal .modal {
  max-width: 600px;
  width: 90%;
  padding: var(--spacing-xl);
}

#feedbackModal .modal h3 {
  margin: 0 0 1rem 0;
}

/* ===== SESSION WARNING MODAL ===== */
.session-warning-modal {
  z-index: 10000; /* Above everything else */
}

.session-warning-content {
  max-width: 420px;
  text-align: center;
}

.session-warning-content .modal-header {
  justify-content: center;
  border-bottom: none;
  padding-bottom: 0;
}

.session-warning-content .modal-title {
  color: var(--warning);
  font-size: 1.3rem;
}

.session-warning-content .modal-body {
  padding-top: var(--spacing-md);
}

.session-warning-content .modal-body p {
  margin: 0 0 var(--spacing-md);
  font-size: 1rem;
  line-height: 1.6;
}

.session-countdown {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--danger);
  font-variant-numeric: tabular-nums;
}

.session-warning-content .modal-footer {
  justify-content: center;
  border-top: none;
  padding-top: 0;
}

/* ===== CSV PREVIEW MODAL ===== */
#csvPreviewModal .modal {
  max-width: 900px;
  width: 95%;
}

.modal-xl,
.modal.modal-xl {
  max-width: 900px !important;
  width: 95% !important;
}

.csv-mapping-section {
  padding: var(--spacing-md);
  background: var(--bg-subtle);
  border-radius: var(--radius);
  margin-bottom: var(--spacing-md);
  border: 2px solid transparent;
  transition: border-color 0.3s ease;
}

.csv-mapping-section h4 {
  margin: 0 0 var(--spacing-sm) 0;
  font-size: 1rem;
}

.csv-mapping-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.csv-mapping-col {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  min-width: 100px;
  flex: 1;
}

.csv-mapping-col label {
  font-size: 0.75rem;
  color: var(--fg-muted);
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.csv-field-select {
  font-size: 0.8rem;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-white);
}

.csv-preview-table {
  font-size: 0.85rem;
}

.csv-preview-table th,
.csv-preview-table td {
  padding: 0.5rem;
  vertical-align: middle;
}

.csv-row.status-ok {
  background: var(--success-bg, rgba(34, 197, 94, 0.05));
}

.csv-row.status-conflict {
  background: var(--warning-bg, rgba(245, 158, 11, 0.1));
}

.csv-row.status-error {
  background: var(--danger-bg, rgba(239, 68, 68, 0.1));
}

.csv-conflict-action {
  font-size: 0.8rem;
  padding: 0.2rem 0.4rem;
  margin-right: 0.5rem;
}

.csv-summary {
  font-size: 0.9rem;
}

/* ===== TABS ===== */
.tabs {
  display: flex;
  gap: var(--spacing-xs);
  border-bottom: 1px solid var(--border);
  margin-bottom: var(--spacing-lg);
}

.tab {
  padding: var(--spacing-sm) var(--spacing-md);
  border: none;
  background: none;
  color: var(--fg-muted);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: all 0.15s ease;
}

.tab:hover {
  color: var(--fg);
}

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

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* ===== BACKEND STATUS ===== */
.backend-status {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--chip-bg);
  border-radius: var(--radius);
  font-size: 0.85rem;
}

.backend-status .indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--fg-muted);
}

.backend-status.online .indicator {
  background: var(--success);
}

.backend-status.offline .indicator {
  background: var(--danger);
}

.backend-status .version-text {
  color: var(--fg-muted);
  font-size: 0.75rem;
  margin-left: auto;
  opacity: 0.7;
}

/* ===== OFFLINE-MODUS STYLES ===== */

/* Deaktivierte Elemente im Offline-Modus */
.offline-disabled {
  opacity: 0.5;
  cursor: not-allowed !important;
  position: relative;
}

.offline-disabled::after {
  content: '';
  display: inline-block;
  width: 0.9em;
  height: 0.9em;
  margin-left: 0.5rem;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 256 256'%3E%3Cpath fill='%2364748b' d='M208 80h-32V56a48 48 0 0 0-96 0v24H48a16 16 0 0 0-16 16v112a16 16 0 0 0 16 16h160a16 16 0 0 0 16-16V96a16 16 0 0 0-16-16ZM96 56a32 32 0 0 1 64 0v24H96Zm112 152H48V96h160v112Zm-68-56a12 12 0 1 1-12-12 12 12 0 0 1 12 12Z'/%3E%3C/svg%3E");
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  vertical-align: middle;
}

/* Sidebar-Links im Offline-Modus */
.offline-mode .sidebar .nav-link.offline-disabled {
  color: var(--fg-muted);
  background: transparent;
}

.offline-mode .sidebar .nav-link.offline-disabled:hover {
  background: transparent;
  color: var(--fg-muted);
}

/* Workflow-Cards im Offline-Modus (Übersicht) */
.workflow-card.workflow-disabled {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
  position: relative;
}

.workflow-card.workflow-disabled .workflow-icon {
  background: var(--chip-bg);
}

.workflow-card.workflow-disabled .workflow-icon svg {
  color: var(--fg-muted);
}

.workflow-card.workflow-disabled h4,
.workflow-card.workflow-disabled p {
  color: var(--fg-muted);
}

.workflow-card.workflow-disabled .workflow-link {
  color: var(--fg-muted);
  pointer-events: none;
}

/* Offline-Badge für deaktivierte Cards */
.offline-badge {
  position: absolute;
  bottom: var(--spacing-md);
  left: var(--spacing-md);
  right: var(--spacing-md);
  background: var(--warning-bg);
  color: var(--warning);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius);
  font-size: 0.75rem;
  font-weight: 500;
  text-align: center;
  border: 1px solid var(--warning);
}

/* Offline-Banner in der Sidebar */
.offline-banner {
  background: linear-gradient(135deg, var(--primary-bg) 0%, var(--warning-bg) 100%);
  border: 1px solid var(--warning);
  border-radius: var(--radius);
  padding: var(--spacing-sm) var(--spacing-md);
  margin: var(--spacing-md);
  font-size: 0.8rem;
  color: var(--fg);
}

.offline-banner strong {
  display: block;
  margin-bottom: 0.25rem;
  color: var(--warning);
}

/* Buttons im Offline-Modus */
button.offline-disabled,
.btn.offline-disabled {
  background: var(--chip-bg) !important;
  border-color: var(--border) !important;
  color: var(--fg-muted) !important;
}

/* ===== BADGES ===== */
.badge {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius);
  font-size: 0.75rem;
  font-weight: 500;
}

.badge-sm {
  padding: 0.15rem 0.4rem;
  font-size: 0.7rem;
}

.badge-admin {
  background: var(--danger-bg);
  color: var(--danger);
}

.badge-lehrer {
  background: var(--primary-bg);
  color: var(--primary);
}

.badge-schueler {
  background: var(--success-bg);
  color: var(--success);
}

.badge-late {
  background: var(--warning-bg);
  color: var(--warning);
}

.badge-ontime {
  background: var(--success-bg);
  color: var(--success);
}

.badge-submitted {
  background: var(--success-bg, #dcfce7);
  color: var(--success, #166534);
  font-weight: 600;
}

.badge-pending {
  background: var(--warning-bg, #fef3c7);
  color: var(--warning, #92400e);
}

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

.badge-muted {
  background: var(--chip-bg);
  color: var(--fg-muted);
}

.badge-warning {
  background: var(--warning-bg, #fef3c7);
  color: var(--warning, #92400e);
  border: 1px solid var(--warning-border, #fcd34d);
}

.badge-info {
  background: var(--info-bg, #dbeafe);
  color: var(--info, #1e40af);
  border: 1px solid var(--info-border, #93c5fd);
}

/* Re-upload row highlight */
.reupload-row {
  background: linear-gradient(90deg, var(--warning-bg, #fef3c7) 0%, transparent 8%);
}

.badge-correct {
  background: var(--success-bg);
  border-color: var(--success-border);
  color: var(--success);
}

.badge-selected {
  background: var(--primary-bg);
  border-color: var(--primary);
  color: var(--primary);
}

.badge-wrong {
  background: var(--danger-bg);
  border-color: var(--danger-border);
  color: var(--danger);
}

/* .badge-success, .badge-warning, .badge-danger are defined above in BADGES section */

/* ===== UTILITY CLASSES ===== */
.hidden {
  display: none !important;
}

/* .sr-only is defined at top of file (ACCESSIBILITY section) — not duplicated here */

.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

/* Display utilities */
.flex-center {
  display: flex;
  align-items: center;
}
.flex-center-gap-sm {
  display: flex;
  align-items: center;
  gap: 8px;
}
.flex-center-gap-xs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.flex-1 {
  flex: 1;
}

/* Grid utilities */
.grid-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.grid-col-span-2 {
  grid-column: span 2;
}

/* Spacing utilities */
.gap-xs { gap: 0.5rem; }
.mt-1 { margin-top: 1rem; }
.mt-xs { margin-top: 8px; }
.mb-1 { margin-bottom: 1rem; }

/* Width utilities */
.min-w-150 { min-width: 150px; }
.max-w-500 { max-width: 500px; }
.w-full { width: 100%; }

/* Height utilities */
.min-h-200 { min-height: 200px; }
.min-h-400 { min-height: 400px; }
.max-h-400 {
  max-height: 400px;
  overflow-y: auto;
}

/* Overflow utilities */
.overflow-x-auto { overflow-x: auto; }

/* Text utilities */
.text-center { text-align: center; }
.font-mono {
  font-family: monospace;
  font-size: 0.9rem;
}
.font-normal { font-weight: normal; }
.cursor-pointer { cursor: pointer; }

/* Border utilities */
.border-standard {
  border: 1px solid var(--border);
  padding: 16px;
  border-radius: 8px;
  background: var(--bg-card);
}

/* ===== SKELETON LOADING ===== */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--bg-subtle) 25%,
    var(--bg-hover) 50%,
    var(--bg-subtle) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s ease-in-out infinite;
  border-radius: var(--radius);
}

.skeleton-text {
  height: 1em;
  margin-bottom: 0.5em;
}

.skeleton-text:last-child {
  width: 60%;
}

.skeleton-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
}

.skeleton-button {
  height: 36px;
  width: 100px;
}

@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ===== TOAST NOTIFICATIONS ===== */
.toast-container {
  position: fixed;
  bottom: var(--spacing-lg);
  right: var(--spacing-lg);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--bg-elevated, var(--bg-card));
  border: 1px solid var(--border-default);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  animation: toast-slide-in 0.3s var(--ease-out, ease);
  pointer-events: auto;
  max-width: 400px;
}

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

.toast-message {
  flex: 1;
  font-size: 0.9rem;
  color: var(--text-primary);
}

.toast-close {
  flex-shrink: 0;
  background: none;
  border: none;
  padding: 4px;
  cursor: pointer;
  color: var(--text-muted);
  transition: color 0.15s ease;
}

.toast-close:hover {
  color: var(--text-primary);
}

.toast-success { border-left: 4px solid var(--success); }
.toast-error { border-left: 4px solid var(--danger); }
.toast-warning { border-left: 4px solid var(--warning); }
.toast-info { border-left: 4px solid var(--primary); }

.toast.toast-exit {
  animation: toast-slide-out 0.2s var(--ease-in, ease) forwards;
}

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

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

/* ===== RESPONSIVE ===== */
/* Breakpoint erhöht von 768px auf 1024px für bessere Unterstützung kleiner Desktop-Fenster */
@media (max-width: 1024px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s var(--ease-out, ease-out);
    box-shadow: none;
  }

  .sidebar.open {
    transform: translateX(0);
    z-index: 260;  /* Über overlay */
    box-shadow: 4px 0 20px rgba(0, 0, 0, 0.15);
  }

  /* Sidebar close button - nur mobil sichtbar */
  .sidebar-close-btn {
    display: flex;
    position: absolute;
    top: var(--spacing-md, 1rem);
    right: var(--spacing-md, 1rem);
    width: 32px;
    height: 32px;
    align-items: center;
    justify-content: center;
    background: var(--bg-hover, rgba(0, 0, 0, 0.05));
    border: none;
    border-radius: var(--radius, 6px);
    cursor: pointer;
    color: var(--text-muted, #6b7280);
    z-index: 10;
    transition: background 0.15s, color 0.15s;
  }

  .sidebar-close-btn:hover {
    background: var(--bg-subtle, rgba(0, 0, 0, 0.1));
    color: var(--text-default, #111827);
  }

  .sidebar-overlay {
    opacity: 0;
    transition: opacity 0.3s var(--ease-out, ease-out);
  }

  .sidebar-overlay.active {
    display: block;
    opacity: 1;
    z-index: 250;  /* Über header */
    background: rgba(0, 0, 0, 0.3);  /* Leichter: 30% statt default */
  }

  .main-content {
    margin-left: 0;
  }

  .mobile-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: fixed;  /* Fixed statt sticky für korrekte z-index Stapelung */
    top: var(--header-height, 56px);  /* UNTER app-header starten */
    left: 0;
    right: 0;
    height: 56px;  /* Explizite Höhe wie app-header */
    padding: 0 var(--spacing-md);  /* Horizontales Padding überschreiben */
    box-sizing: border-box;
    z-index: 210;  /* ÜBER app-header (200) für sichere Click-Events */
    background: var(--bg-card);  /* Expliziter Hintergrund für Stacking-Kontext */
    border-bottom: 1px solid var(--border-default);
  }

  .mobile-menu-btn {
    position: relative;
    z-index: 211;  /* Sicherstellen dass Button klickbar ist */
    pointer-events: auto;
  }

  /* Platz für beide fixed header (app-header + mobile-header) */
  .app-layout {
    padding-top: calc(var(--header-height, 56px) + 56px);  /* app-header + mobile-header */
  }

  .content-body {
    padding: var(--spacing-md);
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .btn-group {
    flex-direction: column;
  }

  .btn-group .btn {
    width: 100%;
  }
}

/* ===== Responsives Logo (robust mit !important) ===== */
.sidebar-logo img {
  height: 80px !important;
  min-height: 80px !important;
  width: auto !important;
  max-width: 220px !important;
  display: block !important;
  object-fit: contain !important;
}

/* Tablet - etwas kleiner */
@media (max-width: 1200px) {
  .sidebar-logo img {
    height: 70px !important;
    min-height: 70px !important;
  }
}

/* Kleine Sidebar */
@media (max-width: 900px) {
  .sidebar-logo img {
    height: 60px !important;
    min-height: 60px !important;
  }
}

/* Mobile Header Logo */
.mobile-header img {
  height: 50px !important;
  min-height: 50px !important;
  width: auto !important;
  max-width: 180px !important;
}