.caixa-centralizada{
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    border: 1px solid pink;
}
.caixa-menor{
    justify-content: center;
    align-items: center;;
    border: 2px solid cadetblue;
    background-color: aquamarine;
    width: 60%;
    height: 60%;
}