body {
  margin: 0;
  font-family: Arial, sans-serif;
  background-color: #f5f5f5;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}
.container {
  text-align: center;
  max-width: 600px;
  padding: 40px;
  background: white;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}
a {
  color: #0078D4;
  text-decoration: none;
}
.footer {
  margin-top: 40px;
  font-size: 0.9em;
  color: #666;
}