html,
body {
  viewport-fit: 100;
  height: 100%;
}
.background-image {
  background-image: url(https://images.pexels.com/photos/6333900/pexels-photo-6333900.jpeg?auto=compress&cs=tinysrgb&w=1260&h=750&dpr=1);
  background-repeat: no-repeat;
  background-size: cover;
  background-attachment: fixed;
  backdrop-filter: blur(5px);
}
.background-color {
  background-color: lightgoldenrodyellow;
}
@media screen and (max-width: 991.98px) {
  .profile {
    flex-flow: column wrap;
  }
  .post-container {
    width: 100%;
  }
  .profile-imgs {
    width: 100%;
  }
}