body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

header {
    background-color: #333;
    color: white;
    padding: 10px 0;
    text-align: center;
}

nav ul {
    list-style: none;
    padding: 0;
}

nav ul li {
    display: inline;
    margin-right: 20px;
}

nav ul li a {
    color: white;
    text-decoration: none;
}

main {
    display: flex;
    margin: 20px;
}

#posts {
    flex: 2;
    margin-right: 20px;
}

.post {
    border: 1px solid #ccc;
    margin-bottom: 20px;
    padding: 15px;
}

.post img {
    max-width: 100%;
    height: auto;
}

aside {
    flex: 1;
}

.about-author {
    background-color: #f9f9f9;
    padding: 10px;
    margin-bottom: 20px;
}

.advertisement {
    background-color: #f4f4f4;
    padding: 10px;
    text-align: center;
}

footer {
    text-align: center;
    padding: 10px 0;
    background-color: #333;
    color: white;
    position: relative;
    bottom: 0;
    width: 100%;
}