html,
body {
    padding: 0;
    margin: 0;
    width: 100%;
    height: 100%;
}

* {
    box-sizing: border-box;
}

body {
    text-align: center;
    padding: 0;
    background-color: rgb(175, 146, 86);
    color: #fff;
    font-family: Open Sans;
}

h1 {
    font-size: 50px;
    font-weight: 100;
    text-align: center;
}

.img-logo {
    text-align: center;
}

body {
    font-family: Open Sans;
    font-weight: 100;
    font-size: 20px;
    color: #fff;
    text-align: center;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-pack: center;
    -ms-flex-pack: center;
    justify-content: center;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
}

article {
    display: block;
    width: 700px;
    padding: 50px;
    margin: 0 auto;
}
@media screen and (max-width: 425px) {
    .img-logo {
      width: 250px;
    }
    h1 {
        font-size: 25px;
    }
    article{
        padding: 35px;
    }
}