/* 1. Set the banner's height AND force it to be a flex container */
.main-banner {
  min-height: 200px !important; 
  display: flex !important;
  align-items: stretch !important; /* This tells the children (text/image) to stretch to 200px */
}

/* 2. Make the image fill its container (which is now 200px tall) */
.main-banner .banner-media img {
  height: 100% !important;
  width: 100% !important;
  object-fit: cover !important;
}