#app {
  display: flex;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  height: 100vh;
  flex-shrink: 0;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  z-index: var(--z-sidebar);
  overflow-y: auto;
  position: sticky;
  top: 0;
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: calc((var(--topbar-height) - 36px) / 2) var(--space-lg) var(--space-lg);
  border-bottom: 1px solid var(--border-color);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.logo-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: var(--radius-md);
  font-weight: 800;
  font-size: var(--text-lg);
  color: white;
  overflow: hidden;
}

.logo-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: inherit;
}

.logo-text {
  font-size: var(--text-xl);
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary-light), var(--secondary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.logo.large .logo-icon {
  width: 48px;
  height: 48px;
  font-size: 1.5rem;
  border-radius: var(--radius-lg);
}

.logo.large .logo-text {
  font-size: var(--text-2xl);
}

.sidebar-close {
  display: none;
  font-size: 1.5rem;
  color: var(--text-secondary);
  padding: var(--space-xs);
}

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

.nav-section {
  margin-bottom: var(--space-lg);
}

.nav-section-title {
  display: block;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 0 var(--space-sm);
  margin-bottom: var(--space-sm);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: 10px 14px;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  margin-bottom: 2px;
}

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

.nav-item.active {
  background: var(--primary-glow);
  color: var(--primary-light);
}

.nav-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.nav-label {
  flex: 1;
  font-size: var(--text-sm);
  font-weight: 500;
}

.sidebar-footer {
  padding: var(--space-md) var(--space-lg);
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex: 1;
  cursor: pointer;
  padding: var(--space-xs);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

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

.sidebar-user-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: var(--text-sm);
  color: white;
  flex-shrink: 0;
}

.sidebar-user-info {
  flex: 1;
  min-width: 0;
}

.sidebar-user-name {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-user-plan {
  display: block;
  font-size: var(--text-xs);
  color: var(--text-tertiary);
}

/* Main Content */
.main-content {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

/* Topbar */
.topbar {
  position: sticky;
  top: 0;
  height: var(--topbar-height);
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  padding: 0 var(--space-lg);
  gap: var(--space-lg);
  z-index: var(--z-topbar);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
  cursor: pointer;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.topbar-search {
  flex: 1;
  max-width: 400px;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  background: var(--bg-tertiary);
  padding: 8px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  transition: all var(--transition-fast);
}

.topbar-search:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.topbar-search input {
  background: none;
  border: none;
  flex: 1;
  font-size: var(--text-sm);
}

.topbar-search svg {
  color: var(--text-tertiary);
  flex-shrink: 0;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.topbar-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  position: relative;
}

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

.notification-dot {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 8px;
  height: 8px;
  background: var(--danger);
  border-radius: 50%;
  border: 2px solid var(--bg-primary);
}

/* Page Container */
.page-container {
  flex: 1;
  position: relative;
}

.page-content {
  animation: fadeIn var(--transition-base);
  padding: var(--space-lg);
}

.content-inner {
  width: 100%;
}

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

.page-title {
  font-size: var(--text-3xl);
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.page-subtitle {
  color: var(--text-tertiary);
  font-size: var(--text-base);
}

.page-loader {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.page-loader.active {
  opacity: 1;
  visibility: visible;
}

.loader-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--bg-tertiary);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* Auth Modal */
.auth-modal {
  max-width: 440px;
}

.auth-header {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.auth-subtitle {
  color: var(--text-tertiary);
  margin-top: var(--space-sm);
  font-size: var(--text-sm);
}

.auth-tabs {
  display: flex;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  padding: 4px;
  margin-bottom: var(--space-lg);
}

.auth-tab {
  flex: 1;
  padding: 10px;
  text-align: center;
  border-radius: var(--radius-sm);
  font-weight: 500;
  font-size: var(--text-sm);
  color: var(--text-tertiary);
  transition: all var(--transition-fast);
}

.auth-tab.active {
  background: var(--bg-card);
  color: var(--primary-light);
  box-shadow: var(--shadow-sm);
}

.auth-form {
  display: none;
}

.auth-form.active {
  display: block;
}

.auth-alt {
  text-align: center;
  margin-top: var(--space-md);
  font-size: var(--text-sm);
  color: var(--text-tertiary);
}

.auth-alt a {
  color: var(--primary-light);
  font-weight: 500;
}

/* Page Sections */
.page-section {
  margin-bottom: var(--space-lg);
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
  gap: var(--space-md);
}

.section-title {
  font-size: var(--text-xl);
  font-weight: 600;
}

.section-actions {
  display: flex;
  gap: var(--space-sm);
  align-items: center;
  flex-wrap: wrap;
}

/* Responsive */
@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    transform: translateX(-100%);
    transition: transform var(--transition-base);
  }

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

  .sidebar-close {
    display: flex;
  }

  .hamburger {
    display: flex;
  }

  .topbar {
    padding: 0 var(--space-md);
  }

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

  .topbar-search {
    display: none;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .page-content {
    padding: var(--space-md);
  }
}

@media (min-width: 769px) {
  .sidebar-close {
    display: none !important;
  }
}