.header {

    width: 100%;
    height: 40%;
    background-color: black;    
}


.portfolio {

    margin-left: 27%;
}

.social {

    margin-left: 45%;

}

.conteudo {
    width: 100%;
    height: 80%;
    background-color: darkgray;
    margin: center;
}
.footer {
    background-color: black;
    font-family: Arial, Helvetica, sans-serif;
    width: 100%;
}

h3{
    color: white;
    font-size: 14px;
    margin-top: 2px;
    text-align: center;
}