/* ── App Layout ── */
#app-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* ── Top Bar ── */
.top-bar {
  height: 52px;
  background-color: var(--panel-bg);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 16px;
  z-index: 10;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.brand h1 {
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--primary-color), #a855f7);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.top-actions {
  display: flex;
  gap: 6px;
  align-items: center;
}

/* ── Main Content ── */
.main-content {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* ── Sidebar ── */
.sidebar {
  width: 220px;
  background-color: var(--panel-bg);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  padding: 16px 12px;
  overflow-y: auto;
  transition: background-color var(--transition-smooth);
}

.right-sidebar {
  border-right: none;
  border-left: 1px solid var(--border-color);
  width: 240px;
}

.sidebar h2 {
  font-size: 0.65rem;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 12px;
  letter-spacing: 0.08em;
  font-weight: 600;
}