.container {
  width: 300px;
  margin: 0 auto;
  padding: 20px;
  border: 1px solid #ccc;
  background-color: #f4f4f4;
}

h2 {
  text-align: center;
}

.form-group {
  margin-bottom: 15px;
}

label {
  display: block;
}

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

input[type="submit"] {
  width: 100%;
  padding: 10px;
  background-color: #4CAF50;
  color: #fff;
  border: none;
  cursor: pointer;
}

input[type="submit"]:hover {
  background-color: #45a049;
}