/* ========================================
   APP LAYOUT — collapsible sidebar
   Adapted from frontend_v2/src/components/Layout.css
   ======================================== */

.app-layout {
  display: flex;
  min-height: 100vh;
}

.main-content {
  flex: 1;
  padding: var(--space-xl);
  margin-left: 80px;
  transition: margin-left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  min-height: 100vh;
}

.sidebar:not(.collapsed) ~ .main-content { margin-left: 280px; }

.main-content.auth-only {
  margin-left: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-container {
  max-width: 1600px;
  margin: 0 auto;
}

/* ========================================
   SIDEBAR
   ======================================== */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  width: 280px;
  background: var(--bg-card);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  z-index: 100;
  overflow: hidden;
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.sidebar.collapsed {
  width: 80px;
}

.sidebar.collapsed .nav-label,
.sidebar.collapsed .logo-text,
.sidebar.collapsed .user-details,
.sidebar.collapsed .theme-toggle-btn span,
.sidebar.collapsed .logout-btn span {
  display: none;
}

.sidebar.collapsed .sidebar-header {
  justify-content: center;
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg);
  border-bottom: 1px solid var(--border-color);
  min-height: 76px;
  gap: var(--space-md);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  cursor: pointer;
  min-width: 0;
}

.logo-img {
  height: 36px;
  width: auto;
  flex-shrink: 0;
  object-fit: contain;
}

.logo-text {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
}

.collapse-btn {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-muted);
  cursor: pointer;
  flex-shrink: 0;
  transition: all 0.2s;
}

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

/* ========================================
   NAVIGATION
   ======================================== */
.sidebar-nav {
  flex: 1;
  padding: var(--space-md);
  overflow-y: auto;
}

.nav-item {
  display: block;
  margin-bottom: var(--space-xs);
  border-radius: var(--radius-md);
  text-decoration: none;
  position: relative;
  transition: background var(--transition-fast);
}

.nav-item-content {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  color: var(--text-secondary);
  position: relative;
  z-index: 1;
  border-radius: var(--radius-md);
}

.nav-item.active .nav-item-content {
  color: var(--primary);
  background: linear-gradient(135deg, rgba(220, 38, 38, 0.15) 0%, rgba(220, 38, 38, 0.05) 100%);
  border: 1px solid rgba(220, 38, 38, 0.2);
}

.nav-item:hover:not(.active) .nav-item-content {
  color: var(--text-primary);
  background: var(--bg-elevated);
}

.nav-icon-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

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

.nav-badge {
  position: absolute;
  top: -6px;
  right: -8px;
  min-width: 16px;
  height: 16px;
  padding: 0 4px;
  background: var(--danger, #ef4444);
  color: white;
  font-size: 10px;
  font-weight: 600;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 4px rgba(239, 68, 68, 0.4);
  animation: badge-pulse 2s ease-in-out infinite;
}

@keyframes badge-pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}

.nav-label {
  white-space: nowrap;
  font-size: 0.9rem;
  font-weight: 500;
}

/* ========================================
   SIDEBAR FOOTER
   ======================================== */
.sidebar-footer {
  padding: var(--space-md);
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.user-info {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  margin-bottom: var(--space-xs);
}

.sidebar.collapsed .user-info {
  justify-content: center;
  padding: var(--space-sm);
}

.user-avatar {
  width: 36px;
  height: 36px;
  min-width: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 0.9rem;
  flex-shrink: 0;
}

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

.user-name {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-role {
  font-size: 0.7rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.theme-toggle-btn,
.logout-btn {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
}

.sidebar.collapsed .theme-toggle-btn,
.sidebar.collapsed .logout-btn {
  justify-content: center;
}

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

.logout-btn:hover {
  background: rgba(239, 68, 68, 0.15);
  color: var(--danger);
  border-color: rgba(239, 68, 68, 0.2);
}

/* ========================================
   MOBILE
   ======================================== */
.mobile-menu-btn {
  display: none;
  position: fixed;
  top: var(--space-md);
  left: var(--space-md);
  z-index: 200;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  cursor: pointer;
}

.mobile-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 99;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.mobile-overlay.visible {
  display: block;
  opacity: 1;
}

@media (max-width: 1024px) {
  .mobile-menu-btn { display: flex; }

  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }
  .sidebar.mobile-open {
    transform: translateX(0);
    width: 280px;
  }
  .sidebar.mobile-open .nav-label,
  .sidebar.mobile-open .logo-text,
  .sidebar.mobile-open .user-details,
  .sidebar.mobile-open .theme-toggle-btn span,
  .sidebar.mobile-open .logout-btn span {
    display: inline;
  }

  .main-content {
    margin-left: 0 !important;
    padding: var(--space-md);
    padding-top: 70px;
  }

  .sidebar:not(.collapsed) ~ .main-content {
    margin-left: 0;
  }
}