header{
    background-color: cornflowerblue;
    text-align: center;
    padding: 20px;
    margin: 0 auto;
    border-radius: 15px;
}

header, main, footer{
max-width: 760px;
margin: 0 auto;
}

footer{
    background-color:darkgray;
    padding: 10px;
    text-align: center;
}

header img {
    width: 175px;
    height: auto; 
    border-radius: 10px;
    box-shadow: 0px 2px 10px 0.5px rgb(196, 192, 192);
    float: right;
    margin-top: -10px;
}