body {
  margin: 0;
  font-family: sans-serif;
  background: #fff;
  color: #222;
}

.container {
  display: flex;
  min-height: 100vh;
}

nav {
  width: 220px;
  background: #f3f3f3;
  padding: 1rem;
  border-right: 1px solid #ccc;
}

nav h2 {
  margin-top: 0;
}

nav ul {
  list-style-type: none;
  padding-left: 0;
}

nav li {
  margin: 0.5rem 0;
}

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