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

/* ---------- Sidebar ---------- */
.sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  background: var(--color-white);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  padding: 14px 10px 0;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 2px 10px 36px;
}

.sidebar-logo .logo-mark {
  width: 25px;
  height: 25px;
  border-radius: 0;
  background: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  flex-shrink: 0;
}

.sidebar-logo .logo-mark svg {
  width: 25px;
  height: 25px;
}

.sidebar-logo .logo-text {
  font-size: 1.02rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--color-text);
  white-space: nowrap;
}

.sidebar-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  font-size: 0.82rem;
  font-weight: 500;
  transition: background var(--transition), color var(--transition);
  position: relative;
}

.nav-item .icon {
  width: 19px;
  height: 19px;
  color: currentColor;
}

.nav-item:hover {
  background: var(--color-border-light);
  color: var(--color-text);
}

.nav-item.active {
  background: linear-gradient(90deg, #f3f7ff, #f7f9fc);
  color: var(--color-primary);
}

.nav-item .nav-badge {
  margin-left: auto;
  background: #dbeafe;
  color: var(--color-primary);
  font-size: 0.7rem;
  font-weight: 700;
  min-width: 18px;
  height: 18px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 5px;
}

.sidebar-footer {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-top: 16px;
}

.ai-assistant-card {
  background: linear-gradient(160deg, #eff6ff, #f5f3ff);
  border: 1px solid #e0e9fb;
  border-radius: 9px;
  padding: 15px;
  min-height: 150px;
}

.ai-assistant-card .ai-card-head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.ai-assistant-card .ai-card-head .icon {
  width: 18px;
  height: 18px;
  color: var(--color-primary);
}

.ai-assistant-card .ai-card-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-text);
}

.ai-assistant-card .badge-new {
  margin-left: auto;
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--color-primary);
  background: #fff;
  border-radius: var(--radius-full);
  padding: 2px 8px;
}

.ai-assistant-card p {
  font-size: 0.78rem;
  color: var(--color-text-secondary);
  line-height: 1.45;
  margin-bottom: 12px;
}

.btn-ai-chat {
  width: 100%;
  background: #e8f1ff;
  color: var(--color-primary);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}

.btn-ai-chat:hover {
  background: var(--color-primary-dark);
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 -10px;
  padding: 16px 18px;
  min-height: 110px;
  border-top: 1px solid var(--color-border-light);
}

.sidebar-user .avatar-initials {
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

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

.sidebar-user .user-name {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-user .user-role {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.sidebar-user .user-menu-btn {
  color: var(--color-text-muted);
  padding: 4px;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}

.sidebar-user .user-menu-btn:hover {
  background: var(--color-border-light);
}

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

.topbar {
  height: var(--topbar-height);
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 0 18px 0 0;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-white);
  position: sticky;
  top: 0;
  z-index: 10;
}

.topbar-search {
  flex: 1;
  max-width: 302px;
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 8px 12px;
  transition: border-color var(--transition), background var(--transition);
}

.topbar-search:focus-within {
  border-color: var(--color-primary);
  background: var(--color-white);
}

.topbar-search .icon {
  width: 18px;
  height: 18px;
  color: var(--color-text-muted);
}

.topbar-search input {
  border: none;
  background: none;
  outline: none;
  font-size: 0.68rem;
  width: 100%;
  color: var(--color-text);
}

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

.topbar-actions {
  margin-left: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.topbar-icon-btn {
  position: relative;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  transition: background var(--transition);
}

.topbar-icon-btn:hover {
  background: var(--color-border-light);
}

.topbar-icon-btn .icon {
  width: 21px;
  height: 21px;
}

.topbar-icon-btn .badge-count {
  position: absolute;
  top: 4px;
  right: 4px;
  background: var(--color-danger);
  color: #fff;
  font-size: 0.62rem;
  font-weight: 700;
  min-width: 16px;
  height: 16px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--color-white);
}

.topbar-avatar {
  position: relative;
  width: 42px;
  height: 42px;
  margin-left: 4px;
}

.topbar-avatar .avatar-initials {
  width: 100%;
  height: 100%;
  border-radius: var(--radius-full);
  cursor: pointer;
}

.topbar-avatar .status-dot {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 11px;
  height: 11px;
  background: var(--color-success);
  border: 2px solid var(--color-white);
  border-radius: var(--radius-full);
}

.page-content {
  padding: 16px 24px 24px;
  flex: 1;
}

@media (max-width: 1100px) {
  .sidebar {
    width: 76px;
    padding: 20px 12px;
  }

  .sidebar-logo .logo-text,
  .nav-item span,
  .nav-item .nav-badge,
  .sidebar-footer,
  .sidebar-user .user-info {
    display: none;
  }

  .nav-item {
    justify-content: center;
  }

  .sidebar-user {
    justify-content: center;
  }
}

@media (max-width: 860px) {
  .topbar-search {
    max-width: 220px;
  }
}