* {
    box-sizing: border-box;
}


.cabecalho {
    width: 100%;
    min-height: 150px;
    text-align: center;
    padding: 20px
}

.cabecalho a {
    text-decoration: none;
    color: rgb(0, 0, 0);
}

.cabecalho a:hover {
    color: red;
}

.banner {
    width: 25%;
    min-height: 650px;
    text-align: center;
    float: left;
    padding: 20px
}

.conteudo {
    width: 50%;
    min-height: 650px;
    background-color: rgb(160, 162, 168);
    float: left;
    padding: 20px
}

img {
    max-width: 100%;
}

@media screen and (max-width: 500px) {
    .banner {
        width: 0%;
        height: 0 px;
    }

    .conteudo {
        width: 80%;
    }
}

footer {
    clear: both;
    text-align: center;
    padding: 20px 10px;
    font-size: 14px;
    border-top: 3px solid #15046a;
}