@media screen and  (min-width: 600px) {
    
    .header{
        width: 80%;
        max-width:800px;;
    }
    .header-container{
        max-width: 700px;
        width:100%;
        justify-content:center;;
    }
    #photo{
        width:40%;
        max-width: 300px;
        min-width:180px;
    }
    h2{
        font-size: 10px
    }
    #presentation-description {
        font-size: 30px;
    }
}