#pkr-form {
  max-width: 500px;
  margin: 24px auto;
  padding: 16px;
  border: 1px solid #ddd;
  border-radius: 8px;
}
#pkr-form input,
#pkr-form button {
  width: 100%;
  margin-bottom: 12px;
  padding: 8px;
}
#pkr-form table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 12px;
}
#pkr-form th, #pkr-form td {
  border: 1px solid #ccc;
  padding: 8px;
}