@charset "UTF-8";

.container {
    display: grid;
    grid-template-rows: repeat(3, 100px);
    grid-template-columns: repeat(4, 1fr);
}

.caixa1 {
    background-color: red;
    grid-row: 1 / span 2;
    grid-column: 1 /  span 4;

}

.caixa2 {
    background-color: green;
    grid-row: 2 / span 2;
    grid-column: 1 / span 2;
}

.caixa3 {
    background-color: blue;
    grid-row: 2 / span 2;
    grid-column: 3 / span 2;
}