Post.module.css

.container {
    min-height: 100vh;
    display: flex;
}

.container section {
    width: 80%;
    margin-right: 1rem;
}

.container aside {
    align-items: center;
    display: flex;
    flex-direction: column;
    width: 20%;
    min-width: 250px;
    text-align: center;
    position: sticky;
    top: 80px;
    height: 0;
    min-height: 300px;
}


@media only screen and (max-width: 768px) {
    .container {
        flex-direction: column;
     }

    .container section {
        width: 100%;
    }
    
    .container aside {
        width: 100%;
        position: relative;
    }
}