body {
  font-family: Arial, sans-serif;
  background: #f2f2f2;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}
.container {
  background: #fff;
  padding: 20px;
  border-radius: 10px;
  max-width: 400px;
  width: 90%;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}
input, button {
  width: 100%;
  padding: 10px;
  margin: 10px 0;
  border-radius: 5px;
  border: 1px solid #ccc;
}
button {
  background-color: #007bff;
  color: white;
  border: none;
}
button:hover {
  background-color: #0056b3;
}
.error {
  color: red;
}
.success {
  color: green;
}
a {
  display: block;
  margin-top: 10px;
}