body {
  margin: 0;
  font-family: Segoe UI, Tahoma, sans-serif;
  background-color: #f4f4f4;
  color: #333;
}

.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  width: 220px;
  height: 100%;
  background-color: #4CAF50;
  color: white;
  padding: 20px;
  box-shadow: 2px 0 5px rgba(0,0,0,0.1);
}

.sidebar h2 {
  font-size: 20px;
  margin-bottom: 20px;
}

.sidebar a {
  color: white;
  text-decoration: none;
  display: block;
  margin-bottom: 12px;
  padding: 6px;
  border-radius: 4px;
}

.sidebar a:hover {
  background-color: #45a049;
}

.main {
  margin-left: 240px;
  padding: 30px;
}

button {
  background-color: #4CAF50;
  color: white;
  border: none;
  padding: 10px 16px;
  border-radius: 4px;
  cursor: pointer;
}

button:hover {
  background-color: #45a049;
}