section {
  z-index: 1;
  position: relative;
}

.model-container {
  max-width: 99vw;
  overflow: hidden;
  position: relative;
  width: 100vw;
  height: 545px;
  display: flex;
  justify-content: flex-start;
  align-items: center;
}
@media (min-width: 768px) {
  .model-container {
    justify-content: center;
    height: 780px;
  }
}
.model-container.alt {
  display: none;
}
.model-container canvas {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  margin: auto;
  margin-top: 100px;
  width: 100%;
  height: 100%;
  max-width: 100%;
  z-index: 0;
}
.model-container .content {
  position: relative;
  z-index: 2;
  background-color: transparent;
}

.alt-primary-colour .model-container {
  display: none;
}
.alt-primary-colour .model-container.alt {
  display: flex;
}