*{
    box-sizing: border-box;
}
body{
    background-color: rgb(255, 255, 255);
}

#padre{
    width: 100%;
    height: 250px;
    background-color: purple;
    display: flex;
    flex-wrap: nowrap;
    padding: 10px;

}
#hijo{
    width: 98%;
    height: 230px;
    background-color: pink;
    padding: 12px;
}
#nieto{
    width: 95%;
    height: 200px;
    background-color: rgb(9, 247, 9);
    margin-left: 10px;
    padding: 10px;
}
#biznieto{
    width: 100%;
    height: 180px;
    background-color: rgb(231, 213, 23);
}