.nav-item {
  margin-right: 20px;
}

#mini {
  width: 220px;
  height: 600px;
  overflow: auto;
  float: left;
}

#grande {
  width: 980px;
  height: 600px;
  float: right;
}

#grande iframe {
  width: 800px;
  height: 600px;
  margin: 0 auto;
  display: block;

}

@media(min-width: 576px) {}

@media(min-width: 768px) {}

@media(min-width: 992px) {}

@media(min-width: 1200px) {}