body {
  font-family: Arial, sans-serif;
  background-color: #f0f0f0;
}

h2 {
  margin-top: 0;
}

label {
  display: block;
  margin-bottom: 5px;
}

input[type="text"],
input[type="password"] {
  display: block;
  margin-bottom: 10px;
  padding: 5px;
  border: 1px solid #ccc;
  border-radius: 3px;
  font-size: 16px;
}

button {
  background-color: #007bff;
  color: #fff;
  border: none;
  border-radius: 3px;
  padding: 5px 10px;
  font-size: 16px;
  cursor: pointer;
}

button:hover {
  background-color: #0062cc;
}

#login,
#adminPanel {
  max-width: 500px;
  margin: 0 auto;
  padding: 20px;
  background-color: #fff;
  border: 1px solid #ccc;
  border-radius: 3px;
}

#adminPanel {
  display: none;
}

#userList li {
  margin-bottom: 5px;
}