body{
    background-color: rgba(223, 19, 19, 0.863);
}
h1{
    background-color: darkred;
    color: red;
    font-style: italic;
}
h3{
    color: white;
    font-style: italic;
}

p{
    color: white;
}

.retangulo{
    width: 150px;
    height: 50px;
    background-color: darkred;
}
.retanguloD{
    width: 600px;
    height: 60px;
    background-color: darkred;
}