body {
    background-image: url("https://www.pixelstalk.net/wp-content/uploads/image11/A-colorful-galaxy-with-bright-multi-hued-stars-and-cosmic-dust-showcasing-the-beauty-of-the-universe-in-vivid-detail.jpg");
    background-repeat: no-repeat;
    background-position: center;
    background-attachment: fixed;
    background-size: cover;
}

/* Posting area */

.postArea {
    background-color: white;
    margin-inline: 10%;
    margin-block: 1rem;
    padding-block: 1.5rem;
    border: solid;
    border-radius: 1rem;
}
.MenuToggle {
    position: relative;
    display: none;

}

/* Topics */

.section_topic {
    background-color: white;
    margin-inline: 10%;
    margin-block: 2rem;
    padding: 1rem;
}
.separator {
    background-color: black;
    margin-block: 10px;
    padding: 1px;
}
.topic {
    text-align: center;
}
.topic img {
    max-width:100%;
    max-height: 500px;
}
.topic iframe {
    height: 315px;
    width: 560px;
}
@media (max-width: 768px) {
    .topic img {
        width: 100%;
    }
    .topic iframe {
        height: 160px;
        width: 260px;
    }
}