body {
  margin: 0;
  font-family: sans-serif;
  display: flex;
  height: 100vh;
  background: #f8fafc;
}
.sidebar {
  width: 220px;
  background: #1f2937;
  color: white;
  padding: 1rem;
}
.sidebar h1 {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
}
.sidebar nav a {
  display: block;
  color: #d1d5db;
  text-decoration: none;
  margin-bottom: 1rem;
}
.sidebar nav a:hover {
  color: #3b82f6;
}
.main {
  flex-grow: 1;
  padding: 2rem;
}