div.about-content {
  grid-column: span 30; 
  margin: 1.5rem;
  margin-top: 0.5rem;
  padding: 0 7% 0 7%;
}

div.dimsum_img {
    grid-column: span 12;
}

img.img_full {
    width: 100%;
    display: block;
}
img.img_trunc {
    display: none;
}

.center_img {
    visibility: hidden;
    margin-top: -1.5rem;
}

.carousel_size {
  width: 100%; height: 50%;
}

@media screen and (max-width: 1750px) {

    div.dimsum_img {
        grid-column: span 30;
    }
    img.img_full {
        display: none;    
    }
    img.img_trunc {
        width: 100%;
        display: block;
    }    

    .carousel_size {
      width: 100%; height: 50%;
    }

    .expand {
        display: block;
        width: 100%;
        animation-name: goin;
        animation-duration: 1.5s;
        animation-iteration-count: 1;
        animation-timing-function: ease;
        animation-fill-mode: forwards;
      }

      .center_img {
        visibility: hidden;
        margin-top:-1.5rem;
      }
}

@media screen and (min-width: 800px) {
  .img_trunc {
    animation:goout 1.5s;
    animation-timing-function:ease-out;
    animation-delay:1.5s;
    animation-fill-mode:forwards, none;
    animation-iteration-count: 1;
    -webkit-animation-iteration-count: 1;
    -webkit-animation:goout 1.5s;
    -webkit-animation-timing-function:ease-out;
    -webkit-animation-delay:1.2s;
    -webkit-animation-fill-mode: forwards, none;
  }

  .carousel_size {      
    width: 75%; height: 50%;
  }

  .center_img {
    visibility: visible;
    top: 0;
  }
}


  @keyframes goout {
    0% {
        margin-top: 0%;
    }
    20% {
        margin-top: -8%;
    }
    100% {
        margin-top: -46%;
    }
  }

  @keyframes goin {
    0% {
        margin-top: -46%;
    }
    20% {
        margin-top: -38%;
    }
    100% {
        margin-top: 0%;
    }
  }

  @media screen and (min-width: 1751px) {

  .expand {
    display: none;
  }
  .arrow {
    display: none;
  }
  
}

.center {
  text-align: center;
  display: block;
  margin-left: auto;
  margin-right: auto;
}

.spacer{
  padding-top: 2.5rem;
}

.carousel-inner>.item {
  -webkit-transition: -webkit-transform 1.2s ease-in-out !important;
  -o-transition: -o-transform 1.2s ease-in-out !important;
  transition: transform 1.2s ease-in-out !important;
}