.shell {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background: var(--bg-primary);
  color: var(--text-primary);
}

.tab-bar {
  display: flex;
  align-items: center;
  background: var(--surface);
  border-bottom: 1px solid var(--border-color);
  padding: 0 0.5rem;
}

.tab {
  padding: 0.9rem 1.5rem;
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  border-bottom: 3px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

.tab:hover {
  color: var(--text-primary);
}

.tab.active {
  border-bottom-color: var(--accent);
  color: var(--text-primary);
  font-weight: 600;
}

.logout {
  margin-left: auto;
  align-self: center;
  margin-right: 1rem;
  padding: 0.45rem 1.1rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: transparent;
  color: var(--text-secondary);
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.logout:hover {
  background: rgba(239, 68, 68, 0.12);
  border-color: var(--danger);
  color: var(--danger);
}

.content {
  flex: 1;
  padding: 2rem;
}