src/components/Button/styles.less

.start-button {
  background: linear-gradient(95deg, #5a3fff, #3483ff 39.04%, #0cf);

  &:hover {
    background: linear-gradient(
        0deg,
        hsla(0, 0%, 100%, 0.2),
        hsla(0, 0%, 100%, 0.2)
      ),
      linear-gradient(95deg, #5a3fff, #3483ff 39.04%, #0cf);
  }
}