body {
  font-family: Arial, sans-serif;
  background-color: #f8f9fa;
  margin: 0;
  padding: 0;
}

.hide {
  display: none;
}

.container {
  max-width: 400px;
  margin: 50px auto;
  padding: 20px;
  background-color: #ffffff;
  border-radius: 5px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

h2 {
  text-align: center;
  margin-bottom: 20px;
}

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

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

input[type="text"],
input[type="password"] {
  width: 100%;
  padding: 10px;
  border: 1px solid #ced4da;
  border-radius: 4px;
}

input[type="submit"] {
  width: 100%;
  padding: 10px;
  background-color: #007bff;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

input[type="submit"]:hover {
  background-color: #0056b3;
}

.error {
  color: red;
  margin-top: 10px;
}

.alert {
  text-align: center;
}

.success {
  color: green;
  margin-top: 10px;
}

.header-bar ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  display: flex;
}

.header-bar ul li a {
  padding: 0 10px;
  display: block;
  line-height: 40px;
}