img {
    display: block;
    margin-left: auto;
    margin-right: auto
}


aside {
    display:inline-block;
    z-index:2;
    text-align: center;
    margin: auto;
    width: 100%;
}

section {
    display:block;
    right: 1px;
    z-index:2;
    margin-left: auto;
    margin-right: auto;
    width: 80%;
}

header {
    font-family: Arial, sans-serif;
    font-size: 32px;
    text-align: center;
    font-weight: bold; 
    margin: auto;
    width: 100%;
}