*{
    box-sizing: border-box;
}
body{
    background-color: lightsteelblue;
    margin-left: 700px;
}

h1{
    background-color: black;
    color: white;
    margin-left: -700px;
    margin-top: -10px;
    margin-bottom: -4px;
}
h2{
    background-color: black;
    color: white;
    text-align: center;
    width: 50%;
    margin-left: -25px;
}
h3{
    background-color: black;
    color: white;
}
.texto{
    background-color: white;
    color: black;
    width: 45%;
    padding-bottom: 10px;
}