html, body {
    height: 100%;
}
main{
    margin: 0;
    padding: 0;
    margin-bottom: 50px;    
}
.conteudo{
    margin: 50px 150px;
}
.conteudo h1{
    font-size: 22px;
    font-weight: bold;
}
iframe {
    width: 100%;
    height: 2050px;
    border: none;
}
p{
    text-align: center;
}
@media only screen and (max-width: 990px){
    .conteudo{
        margin: 50px 0;
    }   
}