:root {
    --preview-gap: 10px;
    --preview-width: 20%;
}

#main-content {
    flex: 1;

    display: flex;
    flex-direction: row;
    align-content: flex-start;
    flex-wrap: wrap;
    gap: var(--preview-gap);
}

.centered-message {
    display: block;
    text-align: center;
    width: 100%;
    margin-top: 30px;
}

.preview-link {
    width: calc(var(--preview-width) - var(--preview-gap));
}

@media (max-width: 1600px) {
    :root {
        --preview-width: 25%;
    }
}

@media (max-width: 1200px) {
    :root {
        --preview-width: 33.333%;
    }
}

@media (max-width: 1000px) {
    :root {
        --preview-width: 50%;
    }
}

@media (max-width: 800px) {
    :root {
        --preview-width: 100%;
    }
}