body {
  display: flex;
  min-height: 100vh;
  margin: 0;
  font-family: Arial, sans-serif;
}

.sidebar {
  width: 200px;
  background-color: #f1f5f9;
  border-right: 1px solid #ccc;
  padding-top: 1rem;
  overflow-y: auto;
  scrollbar-width: thin;
}

.sidebar a {
  display: block;
  padding: 12px;
  text-decoration: none;
  color: #333;
  font-weight: bold;
  text-align: center;
  border-bottom: 1px solid #ccc;
}

.sidebar a:hover {
  background-color: #e2e8f0;
}

main {
  flex: 1;
  padding: 2rem;
}

@media (max-width: 768px) {
  body {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
    height: auto;
    border-right: none;
    border-bottom: 1px solid #ccc;
  }

  main {
    padding: 1rem;
  }
}