.footer {
    flex-grow: 2;
    background-color: var(--main-color);
    display: block;
    width: 100%;
    min-height: 100px;
    color: black;
    font-size: 10px;
    box-sizing: border-box;
    padding: 10px;
    font-family: sans-serif;
    line-height: 1.3;
}

.logotypes-wrapper {
    display: flex;

    justify-content: space-around;
    align-items: center;
    width: 100%;
}

.logotype {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    text-align: center;
}

.logotype a {
    margin: auto;
}

.footer img {
    height: 60px;
    display: block;
}

.authors {
    text-align: center;
    display: block;
    width: 100%;
}


@media screen and (max-width: 900px) {
    .logotypes-wrapper {
        flex-direction: column;
    }

    .logotype {
        margin: 20px;
        font-size: 14px;
    }

    .authors {
        font-size: 14px;
    }

    .footer img {
        height: 100px;
        max-width: 90% !important;
    }
}