*{
    box-sizing: border-box;
}

body{
    background-color: aqua;
}

#padre{
    width: 90%;
    height: 300px;
    margin: 10% auto;
    background-color: blue;
    padding: 16px;
    display: flex;
    
}

#hijo{
    width: 100%;
    height: 268px;
    background-color: lightpink;
    padding: 16px;
    
}

#nieto{
    width: 100%;
    height: 236px;
    background-color: lightgreen;
    padding: 16px;
}

#biznieto{
    width: 100%;
    height: 204px;
    background-color: lightyellow;
    padding: 16px;
}
#tataranieto{
    width: 100%;
    height: 172px;
    background-color: lightseagreen;
    padding: 16px;
}