.banner-section {
    display: flex;
    padding: 0 20px;
}
.banner {
    width: 75%;
    height: auto;
    margin-right: 20px;
}

.banner img {
    width: 100%;
    height: 100%;
    border-radius: 8px;
}
.side-image {
    width: 22%;
}
    
.side-image img {
    width: 100%;
    height: 100%;
    border-radius: 8px;
}

@media (max-width: 768px) {
  .banner-section {
    flex-direction: column;
    padding: 0 10px;
  }

  .banner {
    width: 100%;
    margin-right: 0;
  }

  .side-image {
    display: none;
  }
}