#container {
    display: grid;
    grid-template-areas: 
        "header header header"
        "a1 a2 a3"
        "a4 a5 a3"
        "a6 a6 a7"
        "footer footer footer";
    grid-auto-rows: 120px;
    gap: 8px;
}

.header {
    grid-area: header;
    background-color: red;
    display: flex;
    flex-direction: row;
    flex-flow: reverse;
    align-items: center;
}

.ab1 {
    grid-area: a1;
    background-color: orange;
}

.ab2 {
    grid-area: a2;
    background-color: yellow;
}

.ab3 {
    grid-area: a3;
    background-color: green;
}

.ab4 {
    grid-area: a4;
    background-color: blue;
}

.ab5 {
    grid-area: a5;
    background-color: indigo;
}

.ab6 {
    grid-area: a6;
    background-color: violet;
}

.ab7 {
    grid-area: a7;
    background-color: pink;
}

.feet {
    grid-area: footer;
    background-color: rgb(255, 0, 0);
    text-align: center;
}

.nav {
    margin-left: 60%;
    width: 40%;
    display: flex;
    justify-content: space-between;
    background-color: rgb(199, 217, 171);
    padding: 10px;
    margin-top: 5px;
}