/* ===================================
   EXPERT APP - SHARED DASHBOARD LAYOUT
   Common layout for all expert dashboard pages
   Requires: design-system.css
   =================================== */

/* Base Layout */
body {
  font-family: var(--font-sans);
  background: var(--bg-secondary);
  display: flex;
  min-height: 100vh;
  color: var(--text-primary);
}

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

.sidebar {
  width: 240px;
  background: var(--bg-primary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  position: fixed;
  left: 0;
  top: 0;
  height: 100vh;
  padding: var(--spacing-lg) var(--spacing-sm);
  z-index: 100;
}

.sidebar .logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 0 var(--spacing-sm) var(--spacing-lg);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary-indigo);
  border-bottom: 1px solid var(--border-color);
  margin-bottom: var(--spacing-sm);
  text-decoration: none;
}

.sidebar .logo:hover {
  opacity: 0.9;
}

.logo-icon {
  font-size: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-text {
  font-size: 1.25rem;
}

.sidebar-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 10px var(--spacing-sm);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.875rem;
  transition: all var(--transition-base);
  cursor: pointer;
}

.nav-item:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.nav-item.active {
  background: var(--bg-tertiary);
  color: var(--primary-indigo);
}

.nav-item .nav-icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-label {
  flex: 1;
}

.nav-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  background: var(--primary-indigo);
  color: white;
  border-radius: 10px;
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1;
}

.sidebar-footer {
  border-top: 1px solid var(--border-color);
  padding-top: var(--spacing-sm);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

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

.main-content {
  margin-left: 240px;
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

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

.top-nav {
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  padding: var(--spacing-sm) var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 50;
}

.top-nav-left {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.sidebar-toggle {
  border: 1px solid var(--border-color);
  background: var(--bg-primary);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  padding: 0.45rem;
  display: none;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-base);
}

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

.search-bar {
  display: flex;
  align-items: center;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--spacing-xs) var(--spacing-sm);
  width: 320px;
  gap: var(--spacing-xs);
  transition: all var(--transition-base);
}

.search-bar:focus-within {
  border-color: var(--primary-indigo);
  box-shadow: 0 0 0 3px rgba(67, 56, 202, 0.1);
}

.search-bar .search-icon {
  color: var(--text-muted);
  width: 20px;
  height: 20px;
}

.search-input {
  border: none;
  background: transparent;
  outline: none;
  flex: 1;
  font-size: 0.875rem;
  color: var(--text-primary);
  font-family: inherit;
}

.search-input::placeholder {
  color: var(--text-muted);
}

.top-nav-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.icon-btn {
  background: transparent;
  border: none;
  font-size: 1.25rem;
  cursor: pointer;
  padding: var(--spacing-xs);
  border-radius: var(--radius-sm);
  transition: background var(--transition-base);
  position: relative;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.notification-btn {
  position: relative;
}

@media (max-width: 1024px) {
  body {
    flex-direction: column;
  }

  .sidebar {
    transform: translateX(-100%);
    transition: transform var(--transition-slow);
    z-index: 200;
  }

  .sidebar-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.4);
    z-index: 150;
  }

  body.sidebar-open .sidebar {
    transform: translateX(0);
  }

  body.sidebar-open .sidebar-backdrop {
    display: block;
  }

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

  .sidebar-toggle {
    display: inline-flex;
  }

  .search-bar {
    display: none;
  }
}

.notification-badge {
  position: absolute;
  top: 4px;
  right: 4px;
  background: var(--error);
  color: white;
  font-size: 0.625rem;
  font-weight: 700;
  min-width: 16px;
  height: 16px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 4px;
}

.user-profile-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
  padding: 6px var(--spacing-sm) 6px 6px;
  border-radius: var(--radius-md);
  transition: background var(--transition-base);
}

.user-profile-btn:hover {
  background: var(--bg-tertiary);
}

.profile-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  object-fit: cover;
  background: var(--bg-tertiary);
}

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

.user-name {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.2;
}

.user-role {
  font-size: 0.75rem;
  color: var(--text-secondary);
  line-height: 1.2;
}

/* User Menu Dropdown */
user-menu {
  position: relative;
  display: block;
}

.user-dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  min-width: 200px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-base);
  z-index: 1000;
}

.user-dropdown-menu.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--text-primary);
  text-decoration: none;
  font-size: 0.875rem;
  transition: background var(--transition-base);
}

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

.dropdown-icon {
  width: 18px;
  height: 18px;
  color: var(--text-secondary);
}

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

/* ===================================
   PAGE CONTENT AREA
   =================================== */

.page-content {
  padding: var(--spacing-lg);
  max-width: 1200px;
  width: 100%;
  flex: 1;
}

.page-header {
  margin-bottom: var(--spacing-lg);
}

.page-header h1 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
  line-height: 1.2;
}

.page-subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ===================================
   LOADING STATE
   =================================== */

.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid var(--bg-tertiary);
  border-top-color: var(--primary-indigo);
  border-radius: var(--radius-full);
  animation: spin 0.6s linear infinite;
}

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

.loading-lg {
  width: 40px;
  height: 40px;
  border-width: 4px;
}

/* Centered loading state */
.loading-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.loading-text {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* ===================================
   NOTIFICATIONS / TOAST
   =================================== */

.notification {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-weight: 500;
  font-size: 0.875rem;
  z-index: 1000;
  animation: slideIn 0.3s ease;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  max-width: 400px;
}

@keyframes slideIn {
  from {
    transform: translateX(400px);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

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

.notification.error {
  background: var(--error);
  color: white;
}

.notification.info {
  background: var(--info);
  color: white;
}

.notification.warning {
  background: var(--warning);
  color: white;
}

/* ===================================
   USER DROPDOWN MENU
   =================================== */

.user-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: var(--spacing-xs);
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  min-width: 200px;
  padding: var(--spacing-xs);
  z-index: 1000;
  display: none;
}

.user-dropdown.active {
  display: block;
}

.user-dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  text-decoration: none;
  font-size: 0.875rem;
  transition: background var(--transition-base);
  cursor: pointer;
}

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

.user-dropdown-item.danger {
  color: var(--error);
}

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

/* ===================================
   EMPTY STATES
   =================================== */

.empty-state {
  text-align: center;
  padding: var(--spacing-3xl) var(--spacing-lg);
  color: var(--text-secondary);
}

.empty-state-icon {
  font-size: 4rem;
  margin-bottom: var(--spacing-md);
  opacity: 0.5;
}

.empty-state h3 {
  font-size: 1.25rem;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.empty-state p {
  margin-bottom: var(--spacing-lg);
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

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

@media (max-width: 968px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform var(--transition-slow);
  }

  .sidebar.mobile-open {
    transform: translateX(0);
  }

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

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

  .search-bar {
    width: 200px;
  }

  .top-nav {
    padding: var(--spacing-sm) var(--spacing-md);
  }
}

@media (max-width: 640px) {
  .search-bar {
    width: 150px;
  }

  .user-info {
    display: none;
  }

  .page-header h1 {
    font-size: 1.5rem;
  }

  .page-content {
    padding: var(--spacing-sm);
  }
}

/* Mobile menu toggle button */
.mobile-menu-btn {
  display: none;
  background: transparent;
  border: none;
  padding: var(--spacing-xs);
  cursor: pointer;
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  transition: background var(--transition-base);
}

.mobile-menu-btn:hover {
  background: var(--bg-tertiary);
}

@media (max-width: 968px) {
  .mobile-menu-btn {
    display: flex;
    align-items: center;
    justify-content: center;
  }
}