.plane {
    box-shadow: 0 0 0 1px red; /* Border left */
    padding: 2em;
    width: fit-content;
    display: flex;
    flex-direction: column;
    gap: 10em;
    position: relative;
}

.row {
    display: flex;
    gap: 2em;
    justify-content: space-evenly;
}

.node {
    padding: 0.5em;
    border-radius: 4px;
    border: 1px solid #dddddd;
    background-color: #eee;
}

.hidden {
    width: 0;
}