* {
  margin: 0;
  padding: 0;
}
.mycontainer {
  width: 100%;
  padding-right: 15px;
  padding-left: 15px;
  margin-right: auto;
  margin-left: auto;
}

@media (min-width: 576px) {
  .mycontainer {
    max-width: 540px;
  }
}

@media (min-width: 768px) {
  .mycontainer {
    max-width: 720px;
  }
}

@media (min-width: 992px) {
  .mycontainer {
    max-width: 960px;
  }
}

@media (min-width: 1200px) {
  .mycontainer {
    max-width: 1000px;
  }
}
.myrow {
  display: -ms-flexbox;
  display: flex;
  -ms-flex-wrap: wrap;
  flex-wrap: wrap;
  margin-right: -15px;
  margin-left: -15px;
}
.col-lg-6,
.col-sm-12 {
  position: relative;
  width: 100%;
  padding-right: 15px;
  padding-left: 15px;
}
@media (min-width: 992px) {
  .col-lg-6 {
    -ms-flex: 0 0 50%;
    flex: 0 0 50%;
    max-width: 50%;
  }
}
@media (min-width: 576px) {
  .col-sm-12 {
    -ms-flex: 0 0 100%;
    flex: 0 0 100%;
    max-width: 100%;
  }
}
.img-mycontainer {
  display: flex;
  flex-direction: column;
}
.img1 {
  display: block;
  width: 100%;
  height: 770px;
  object-fit: cover;
  object-position: center;
  margin-left:auto;
  margin-right:auto;
}
.img2,
.img3 {
  display: block;
  width: 90%;
  height: 380px;
  object-fit: cover;
  object-position: center;
  margin-left:auto;
  margin-right:auto;
}
img{
  margin-bottom: 10px;
}
.img-thumbnail {
  padding: 0.25rem;
  background-color: #fff;
  border: 1px solid #dee2e6;
  border-radius: 0.25rem;
  max-width: 100%;
}
@media (max-width: 576px) {
  .img1{
    display: none;
  }
}