.banner {
  background-image: url("https://conference.frappehub.com/event/107/images/130-ICoTriCE%202026_%20Sustainable%20Chemistry%20and%20Energy.png");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}