body{
  background-image:url("../images/books.2.jpg");
}

.logo{
  width:150px;
  height:100px;
}


.navbar-brand{
  color: white;
}

.btn-outline-success{
  background: white;
  border-color: green;
  color: green;
}

.img-circle{
  width:200px;
  height:200px;
}

/* Facebook */
.fa-facebook {
    background: #3B5998;
    color: white;
    padding: 20px;
    font-size: 40px;
    width: 50px;
    text-align: center;
    text-decoration: none;
}

/* Twitter */
.fa-twitter {
    background: #55ACEE;
    color: white;
    padding: 20px;
    font-size: 40px;
    width: 50px;
    text-align: center;
    text-decoration: none;
}

.center-block{
  display: block;
  margin-left: auto;
  margin-right: auto;
}

.thumbnail{
width:250px;
height:250px
}