body {
  font-family: sans-serif;
  margin: 0;
  padding: 0;
}
.container {
  display: flex;
  height: 100vh;
}
.sidebar {
  width: 250px;
  background-color: #f2f2f2;
  padding: 20px;
}
.sidebar ul {
  list-style: none;
  padding: 0;
}
.sidebar li {
  margin: 10px 0;
  cursor: pointer;
}
.content {
  flex: 1;
  padding: 20px;
  overflow-y: auto;
}
.content-section {
  display: block;
}