figure {
  text-align: center;
  max-width: 100%;
}

figure img {
  max-width: 100%;
  width: 20em;
}

#diagram-container {
    position: relative;
    display: block;
    width: fit-content;
    text-align: center;
    margin-left: auto;
    margin-right: auto;
    background-color: white;

}

.diagram {
    opacity: 0;
    transition: opacity 0.01s ease;
    width: 80vw;
    max-width: 30em;
}

.diagram:first-of-type {
    position: relative;
}

.diagram:not(:first-of-type) {
    position: absolute;
    top: 0;
    left: 0;
}

.diagram.active {
    opacity: 1;
}