body {
  font-family: Arial, sans-serif;
  background: #f3f3f3;
  padding: 40px;
}

input, select, button {
  display: block;
  width: 300px;
  padding: 8px;
  margin: 10px 0;
}

button {
  background: #333;
  color: #fff;
  border: none;
  cursor: pointer;
}

button:hover {
  background: #000;
}

#loginBox, #panel {
  background: #fff;
  padding: 20px;
  max-width: 400px;
}

label {
  font-weight: bold;
  margin-top: 10px;
}

.error {
  color: red;
}