.seila {

    height: 9.6cm;
    transition: all 0.4s;
    cursor: pointer;
}
.seila:hover{
    -webkit-filter: drop-shadow(2px 5px 1px rgba(0,0,0,.5));
    filter: drop-shadow(5px 5px 5px rgba(0,0,0,.5));
    transform: scale(1.4);
}

  html {

    scroll-behavior: smooth;
  }

  .jumbotron-heading {
    background-color: rgb(254, 255, 255);
  }