flexbox.css

.Container {
    display: flex;
    border: 5px solid black;
    height: 45px;
    padding: 2px;
    width: 800px;
    height: 300px;
    align-items: center;
    flex-direction: row;
    justify-content: center;
}

.fcontainer {
    display: flex;
    border: 5px solid yellow;
    background-color: pink;
    padding: 4px;
    margin: 5px;
    width: 180px;
    height: 150px;
    flex-direction: row;
    font-style: inherit;
}

.Item {
    background-color: red;
    border: 5px solid blue;
    padding: 2px;
    margin: 5px;
    width: 180px;
    height: 150px;
    display: flex;
}

.Fblack {
    display: flex;
    background-color: green;
    border: 5px solid red;
    margin: 5px;
    width: 180px;
    height: 150px;
    padding: 2px;
}

.Container .item1 {
    border: 5px solid lightgreen;
    background-color: yellow;
}

.fcontainer .item2 {
    border: 5px solid purple;
    background-color: pink;
}

.Fblack .item3 {
    border: 5px solid wheat;
    background-color: plum;
}