*{
    box-sizing: border-box;
}

body{
    background-color: aquamarine;
}

#padre{
    width: 90%;
    height: 300px;
    margin: 10px auto;
    background-color: blue;
    padding: 1%;
    display: flex;
    

}

#hijo1{
    width: 20%;
    height: 270px;
    background-color: lightyellow;
}

#hijo2{
    width: 80%;
    height: 270px;
    background-color: rgb(204, 34, 153);
    padding: 16px;
    margin-left: 16px;
}

#nieto1{
    width: 100%;
    height: 236px;
    background-color: rgb(53, 160, 32);
    
}