body {
  background-color: red;
  color: yellow;
  font-family: Sans-Serif;
  font-weight: 300; /* corrected from 'thin' */
}
button {
  background-color: red;
  border: 4px solid yellow;
  font-weight: bold;
  color: yellow;
  border-radius: 6px;
  padding: 10px 20px;
  cursor: pointer;
}