body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  height: 100%;
}

.sidebar {
  max-width: 250px;
  transition: width 0.3 ease;
  box-shadow: 2px 0 10px rgba(0,0,0,0.05);
}

.sidebar .nav-link {
  color: #333;
  font-weight: 500;
  border-radius: 0.5rem;
  margin: 0.2rem 0;
  transition: all 0.2s;
}

.sidebar .nav-link:hover {
  background: #f8f9fa;
  color: #0d6efd;
}

.sidebar .nav-link.active {
  background: #0d6efd;
  color: #fff;
}