body {
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    color: #333;
}

header {
    background-color: #222;
    color: white;
    padding: 20px;
    text-align: center;
}

nav {
    background-color: #444;
    padding: 10px;
    text-align: center;
}

nav a {
    color: white;
    text-decoration: none;
    margin: 0 15px;
}

main {
    padding: 40px;
    text-align: center;
}

.button {
    display: inline-block;
    padding: 12px 24px;
    background-color: #007bff;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    margin-top: 20px;
}

footer {
    background-color: #222;
    color: white;
    text-align: center;
    padding: 15px;
    position: fixed;
    bottom: 0;
    width: 100%;
}

.parent {
    display: grid;
    place-items: center
}

.centered-content {
    align: center;
    justify-content: center;
    align-items: center;
    margin: 2em; 
    align: center;
    width: calc(100% * 2 / 3);    
}