body {
  font-family: Arial, sans-serif;
  background: #f2f4f8;
  margin: 0;
  padding: 0;
  display: flex;
  height: 100vh;
  align-items: center;
  justify-content: center;
}

.container {
  background: white;
  padding: 40px;
  border-radius: 12px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.1);
  width: 100%;
  max-width: 400px;
  text-align: center;
}

h2 {
  color: #333;
}

input[type="text"],
input[type="password"] {
  width: 100%;
  padding: 12px;
  margin: 10px 0;
  border: 1px solid #ccc;
  border-radius: 6px;
}

button {
  background-color: #4CAF50;
  color: white;
  padding: 12px 20px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  width: 100%;
  margin-top: 10px;
}

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

#error {
  color: red;
  margin-bottom: 15px;
}

ul {
  list-style: none;
  padding: 0;
}

li {
  background: #e0f7fa;
  margin: 8px 0;
  padding: 10px;
  border-radius: 8px;
  font-family: monospace;
}

.logout-link {
  display: block;
  margin-bottom: 20px;
  color: #007bff;
  text-decoration: none;
}

.logout-link:hover {
  text-decoration: underline;
}