.logo {
    width: 50%;
    height: 50%;
    text-align: center;
    margin: auto;
    size: 20;
}

span {
    font-weight: bold;
    text-decoration: none;
}

#art0 {
    text-decoration: underline;
    font-weight: bold;
 

}


.p1 {
    margin-left: 30px;

}

ul,li{
    margin-left: 10px;
}

div{
    display: 'block';
}