:root {
  --jumbotron-padding-y: 3rem;
}

.jumbotron {
  padding-top: var(--jumbotron-padding-y);
  padding-bottom: var(--jumbotron-padding-y);
  margin-bottom: 0;
  background-color: #fff;
}
@media (min-width: 768px) {
  .jumbotron {
    padding-top: calc(var(--jumbotron-padding-y) * 2);
    padding-bottom: calc(var(--jumbotron-padding-y) * 2);
  }
}

.jumbotron p:last-child {
  margin-bottom: 0;
}

.jumbotron-heading {
  font-weight: 300;
}

.jumbotron .container {
  max-width: 40rem;
}
.model-box {
  position:   relative;
  width:      100%;
  height: 0;
  padding-top:   66.6%; /* This is your aspect ratio */
  margin-top: 1rem;
}
.model {
  position: absolute;
  top:      0;
  left:     0;
  bottom:   0;
  right:    0;
  width:    100%;
  height:   100%
}

.thanks {
    max-height: 32px;
}

.svgs {
    max-width: 24px;
    padding-right: 4px;
    padding-bottom: 4px
}

footer {
  padding-top: 3rem;
  padding-bottom: 3rem;
}

footer p {
  margin-bottom: .25rem;
}

.box-shadow { box-shadow: 0 .25rem .75rem rgba(0, 0, 0, .05); }