.gallery { 
    -webkit-column-count: 4;
    -moz-column-count: 4;
    column-count: 4;
    -webkit-column-gap: 1em;
    -moz-column-gap: 1em;
    column-gap: 1em;
    margin: 1em auto;
    overflow: hidden;
    width: 90%;
}
.gallery img { 
    width: 100%; 
    height: auto;
    transition: 500ms;
    margin-bottom: 0.5em;
    opacity: 0.8;
    page-break-inside: avoid; 
    -webkit-column-break-inside: avoid; 
    break-inside: avoid; 
}
.gallery img:hover {
    opacity: 1;
}
.modal-img,.model-vid{
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  display: table
}
.modal-body{
  padding: 0px;
}
.modal-dialog {
  height: 100%;
      position: relative;
    margin: auto;
    display: flex;
    align-items: center;
    justify-content: center;
}
.modal-content {
  border: none;
}
@media screen and (max-width: 767px) {
	.gallery { 
        -webkit-column-count: 2;
        -moz-column-count: 2;
        column-count: 2;
    }
	.gallery div { margin: 0; 
        width: 200px;
    }
  .modal-dialog {
        margin: 0 8vw;
    }
}
@media screen and (max-width: 479px) {
    .gallery { 
        -webkit-column-count: 1;
        -moz-column-count: 1;
        column-count: 1;
    }
    .gallery div { 
        margin: 0; 
        width: 200px;
    }
}