body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}
header {
    background: #333;
    color: #fff;
    padding: 10px 0;
    text-align: center;
}
header h1 {
    margin: 0;
    font-size: 24px;
}
nav a {
    color: #fff;
    text-decoration: none;
    margin: 0 15px;
}
main {
    padding: 20px;
}
footer {
    background: #333;
    color: #fff;
    text-align: center;
    padding: 10px 0;
    position: absolute;
    bottom: 0;
    width: 100%;
}