.hyperbolic_model {
    display: inline-block;
    padding: 1em;
}

.flex-container {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
}

.flex-container > .panel {
    margin: 2em;
    box-shadow: 1px 1px 5px rgba(0, 0, 0, .5);
}

.panel > h2 {
    padding: 0.25em;
    font-size: 1.5em;
    background-color: #efe;
    margin-top: 0;
    margin-bottom: 0;
    text-align: center;
    box-shadow: 1px 1px 5px rgba(0, 0, 0, .5);
}

.panel > .text {
    padding: 2em;
}

.panel > .text > span {
    display: inline-block;
    min-width: 100px;
}