body {
  background: #111;
  color: #fff;
  font-family: Arial, sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.login-box {
  background: #1e1e1e;
  padding: 30px;
  border-radius: 10px;
  width: 300px;
  text-align: center;
}

input {
  width: 100%;
  margin: 10px 0;
  padding: 10px;
  border-radius: 5px;
  border: none;
}

button {
  width: 100%;
  padding: 10px;
  background: #4caf50;
  border: none;
  color: white;
  font-size: 16px;
  cursor: pointer;
}

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