.captcha-input[type="text"] {
  padding: 12px 20px;
  display: inline-block;
  border: 1px solid #ccc;
  border-radius: 4px;
  box-sizing: border-box;
}
.captcha-button {
  background-color: #4caf50;
  border: none;
  color: white;
  padding: 12px 30px;
  text-decoration: none;
  margin: 4px 2px;
  cursor: pointer;
}
canvas {
  /*prevent interaction with the canvas*/
  pointer-events: none;
}