* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    color: #333;
}

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

header nav ul {
    list-style: none;
}

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

header nav ul li a {
    color: white;
    text-decoration: none;
    font-size: 18px;
}

header .logo {
    width: 100px;
    height: auto;
}

.hero {
    background-color: #0099cc;
    color: white;
    padding: 50px 0;
    text-align: center;
}

.hero .hero-image {
    width: 100%;
    height: auto;
}

.about, .article, .contact {
    padding: 20px;
    text-align: center;
    margin: 20px 0;
}

.article-image {
    width: 100%;
    height: auto;
}

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

footer p {
    font-size: 14px;
}