body {
    background-color: white;
    margin:0;
    padding:0;
    font-size: 100%;
}

.logo {
    background-image: url(logo.png);
    background-size: 100% 100%;
    margin: 19% auto 0px auto;
    width: 800px; 
    height: 174px;
}
.description {
    font-size: 1.8em;
    margin:auto; 
    width: 100%;
    text-align: center;
    padding-top: 40px;
    font-family: sans-serif;
    letter-spacing: 0.0.5em;
 }
 .additional {
    font-size: 1em;
    margin:auto; 
    width: 100%;
    text-align: center;
    padding-top: 40px;
    font-family: sans-serif;
    letter-spacing: 0.0.5em;
 }
 .additional a 
 {
    text-decoration: none;
    color:#3b5998;
    font-weight: bold;
 }
.footer {
    position: fixed;
    bottom: 0;
    width: 100%;
}
.center p{
    width: 400px;
    margin: 0 auto;
    margin-bottom: 14px;
    text-align-last:center;
    font-size: 1em;
    font-family: sans-serif;
    line-height: 1.3;
   
}

.center p a {
    text-decoration: none;
    color: black;
}