@media screen and (max-width: 768px) {
  .menu ul {
    flex-direction: column;
  }
  .hero-info h1 {
    font-size: 40px;
    text-align: center;
    line-height: 60px;
  }
  .hero-info p {
    text-align: center;
  }
  .hero-info .button {
    width: 200px;
  }
  .about-card {
    width: 100%;
    top: 0;
  }
  .card-info h3 {
    text-align: center;
  }
}