#cliques {
    height: 450px; /* or whatever height your graph typically needs */
    position: relative;
}

#cliques::before {
    content: "Loading graph...";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 1rem;
    color: #4B5D6C;
}

#cliques.loaded::before {
    content: none;
}