body {
    font-family: 'Open Sans', sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f6f8fa;
}

header {
    background-color: #282c36;
    color: white;
    text-align: center;
    padding: 10px 0;
}

article {
    padding: 20px;
    max-width: 800px;
    margin: auto;
    line-height: 1.6;
}

h1, h2, h3 {
    color: #333;
}

a {
    color: #1e88e5;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

footer {
    background-color: #282c36;
    color: white;
    text-align: center;
    padding: 10px 0;
    position: absolute;
    bottom: 0;
    width: 100%;
}