body {
  font-family: Arial, sans-serif;
  background-color: #f0f0f0;
  color: #333;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100vh;
  text-align: center;
}

h1 {
  color: #0078d7;
}

p {
  font-size: 1.2rem;
}

.nav, .btn {
  margin: 10px;
}

.btn {
  background-color: #0078d7;
  color: white;
  padding: 10px 20px;
  text-decoration: none;
  border-radius: 5px;
  font-size: 1rem;
  display: inline-block;
}

.btn:hover {
  background-color: #005a9e;
}

.error {
  color: red;
  font-size: 1rem;
  margin-top: 10px;
}