/* Layout container */
.app-container {
  display: flex;
  min-height: 100vh;
  background: var(--color-surface-base);
  overflow: hidden;
}

/* Main content area */
.main-content {
  flex: 1;
  margin-left: 260px;
  padding: 1.5rem;
  background: radial-gradient(circle at top right, rgba(124, 22, 245, 0.08), transparent 40%), var(--color-surface-base);
  color: var(--color-text-primary);
  min-width: 0;
  overflow-y: auto;
  transition: margin-left 0.3s ease;
}

/* Main content without sidebar */
.main-content.no-sidebar {
  margin-left: 0;
}

.impersonation-banner {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin: -1.5rem -1.5rem 1rem;
  padding: 0.9rem 1.5rem;
  background: linear-gradient(90deg, rgba(181, 77, 25, 0.95), rgba(120, 34, 6, 0.95));
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
  color: #fff7ed;
  box-shadow: 0 14px 28px rgba(44, 18, 5, 0.22);
}

.impersonation-banner__content {
  min-width: 0;
}

.impersonation-banner__eyebrow {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0.82;
}

.impersonation-banner__title,
.impersonation-banner__subtitle {
  margin-top: 0.1rem;
  line-height: 1.35;
}

.impersonation-banner__title {
  font-size: 1rem;
}

.impersonation-banner__subtitle,
.impersonation-banner__meta {
  color: rgba(255, 247, 237, 0.88);
}

.impersonation-banner__actions {
  flex-shrink: 0;
}

.impersonation-banner .btn {
  border-color: rgba(255, 247, 237, 0.35);
  background: rgba(255, 247, 237, 0.12);
  color: #fff7ed;
}

.impersonation-banner .btn:hover {
  background: rgba(255, 247, 237, 0.2);
}

/* Page headers */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.85rem;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.page-title {
  font-size: var(--ui-density-title-size);
  font-weight: 700;
  color: var(--color-text-primary);
  margin: 0;
  letter-spacing: -0.01em;
}

/* Header actions */
.header-actions {
  display: flex;
  gap: 0.4rem;
  align-items: center;
}

.global-assist-trigger {
  display: inline-flex;
  align-items: center;
}

.global-assist-trigger--detached {
  display: none;
}

@media (max-width: 768px) {
  .header-actions {
    flex-wrap: wrap;
  }
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 2.5rem 1rem;
  color: var(--color-text-secondary);
}

.empty-state h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
  color: var(--color-text-primary);
}

.empty-state p {
  margin-bottom: 1rem;
}

.empty-state .form-actions {
  justify-content: center;
}

/* Responsive design */
@media (max-width: 768px) {
  .main-content {
    margin-left: 0;
    padding: 1rem;
    padding-top: 4rem;
  }

  /* Mobile header layout */
  .mobile-header {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem 0.75rem 4rem;
    background: var(--color-surface-elevated);
    border-bottom: 1px solid var(--color-border-primary);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1002;
    min-height: 4rem;
  }

  .mobile-header .page-title {
    font-size: clamp(1.2rem, 4.8vw, 1.5rem);
    margin: 0;
    min-width: 0;
    text-align: left;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .mobile-header .btn {
    max-width: min(45vw, 12rem);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .page-header.desktop-only {
    display: none !important;
  }

  .impersonation-banner {
    top: 4rem;
    margin: 0 -1rem 1rem;
    padding: 0.85rem 1rem;
    align-items: flex-start;
    flex-direction: column;
  }

  .impersonation-banner__actions {
    width: 100%;
  }

  .impersonation-banner__actions .btn {
    width: 100%;
    justify-content: center;
  }

  .ideas-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
}

/* Hide mobile header on desktop */
@media (min-width: 769px) {
  .mobile-header {
    display: none;
  }
}

/* Desktop only elements */
@media (max-width: 768px) {
  .desktop-only {
    display: none !important;
  }
}