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

* {
    box-sizing: border-box;
}

body {
    text-align: center;
    padding: 0;
    background: #557b97;
    color: #fff;
    font-family: Open Sans;
    font-weight: 100;
    font-size: 20px;
    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;
}

img#header-logo { width: 100%; margin-left: -50px; margin-top: 50px; }

h1 {
    font-size: 3.5rem;
    font-weight: 100;
    text-align: center;
}

article {
    display: block;
    max-width: 700px;
    padding: 50px;
    margin: 0 auto;
}

a {
    color: #fff;
    font-weight: bold;
}

a:hover {
    text-decoration: none;
}