body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    background-color: #333;
    color: #fff;
    padding: 20px;
    text-align: center;
}

header nav {
    margin-top: 10px;
}

header nav a {
    color: #fff;
    text-decoration: none;
    font-weight: bold;
    margin: 0 10px;
}

footer {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 10px;
    margin-top: auto;
    width: 100%;
    box-sizing: border-box;
}

main {
    padding: 20px;
    flex: 1;
    width: 100%;
    box-sizing: border-box;
}