.img-responsive {
  max-width: 100%;
}
.img-block {
  position: relative;
  margin: 10px auto;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 0 11px #3e3e3e;
  max-width: 600px;
}

.img-block-1 {
  position: relative;
  margin: 10px auto;
  border-radius: 10px;
  overflow: hidden;
  max-width: 600px;
}
.dark {
  background-color: #000;
}
.btn-light{
    color: #fff;
    background-color: #a5793a;
    border-color: #a5793a;
    font-size: 1.2em;
    padding: 10px 30px;
    border-radius: 100px;
}