* {
    box-sizing: border-box;
}
body{
    background-color: blueviolet;
}
#padre{
    width: 100%;
    height: 250px;
    background-color: lightblue;
    display: flex;
    flex-wrap: nowrap;
    padding: 10px;

    justify-content: space-evenly;
    align-items: center;


}
#hijo1{
    width: 20%;
    height: 230px;
    background-color: red;
    margin: 10px;
}
#hijo2{
    width: 100%;
    height: 230px;
    background-color: blue;
    margin-left: 10px;
    padding: 10px;
}
#nieto{
    width: 100%;
    height: 210px;
    background-color: orange;
}