body {
    font-family:sans-serif;
    margin:0rem;
    background-color:#fafafa;
    height:4000px;
}

header {
    text-align:center;
    position:fixed;
    top:0rem;
    width:100%;
    background-color:lightgrey;
    border-bottom:5px solid black;
    z-index: 999;
}

main {
    width:500px;
    margin:100px auto 0;
    position:relative;
    height:100%;
}

.post {
    position:static; /*Default position*/
    background-color:white;
    border:3px solid #dbdbdb;
    margin-bottom:30px;
}

.image-container {
    position:relative;
    width:100%;
    height:800px;
}

.post-media {
    width:100%;
    height:100%;
    object-fit:cover;
}

.live-badge {
    position:absolute;
    top:10px;
    left:10px;
    background-color:red;
    color:white;
    padding:2px 8px;
    font-weight:bold;
    border-radius:3px;
}

.post-description {
    padding:1rem;
}

.user {
    font-weight:bold;
}

.ad {
    background-color:lightblue;
    padding:1rem;
    position:sticky;
    top:80px;
}