body {
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f0f4f7;
    color: #333;
}

header {
    text-align: center;
    background-color: #3498db;
    color: #fff;
    padding: 20px;
}

img {
    border-radius: 50%;
    max-width: 150px;
    height: auto;
}

.about,
.articles {
    margin: 20px;
}

footer {
    text-align: center;
    padding: 10px;
    background-color: #3498db;
    color: #fff;
}