#my-carousel .carousel-inner {
  width: 100%;
  height: 500px;
  position: relative;
}

#my-carousel .carousel-inner .item {
  background: linear-gradient(rgba(0, 0, 0, 0.45), rgba(90, 90, 90, 0.45)), url(https://i.ytimg.com/vi/tntOCGkgt98/maxresdefault.jpg);
  background-size: cover;
  background-position: center top;
  -webkit-filter: blur(5px);
  -moz-filter: blur(5px);
  -o-filter: blur(5px);
  -ms-filter: blur(5px);
  filter: blur(5px);
  width: 100%;
  height: 100%;
}

#my-carousel .carousel-inner .container {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

#my-carousel .carousel-inner .container .carousel-caption {
  position: relative;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
}

@media (min-width:768px) {
  #my-carousel .carousel-inner .item {
    height: 500px
  }
}

@media (max-width:768px) {
  .banner-text-size {
    font-size: 30px!important;
    line-height: 40px;
  }
}

.bta {
  transition: transform 250ms;
}
.bta:hover {
 transform : translateY(-10px);
}