@media screen and (max-width: 700px){
    header .container{
        display: flex;
        flex-direction: column;
    }

    .botao{
        margin-top: 15px;
    }

    .box-filme{
        height: 400px;
        width: 20%;
    }
}

@media screen and (min-width: 900px){
    .filme-principal .descricao{
        width: 50%;
    }
}