body
{
    text-align: center;
    font-family: 'Ubuntu', 'Candara', 'Arial';
    margin: 0px;
    padding: 0px;
    background: rgba(0,0,0,0.2);
    background-repeat: no-repeat;
    background-position: center;
    background-size: cover;
    background-attachment: fixed;
}

/* Header */
.page-header {
    background-color: rgba(98,134,155,1);
}

/* Menu */
#pop-up .active {
    background-color: rgba(98,134,155,0.2);
}

/*Main content*/
.main {
    position: fixed;
    top: 0;
    width: 100%;
    margin-top: 64px;
}

.main ul {
    text-align: right;
    width: 100%;
}

.site img {
    height:150px;
    border-radius: 5%;
}
p{
    text-align: center;
}
h2 {
    text-align: center;
    padding: 30px;
    text-shadow: 0px 0px 10px rgba(0,0,0,0.7);
}

.main .nav-pills {
    position: fixed;
    top: 64px; left 0;
    padding: 0px 64px;
    background-color: rgba(0,0,0,0.5);
    z-index: 9000;
}

.main .nav li{
    display: inline;
}
.main .nav a {
  display: block;
  color: #fff;
  font-size: 11px;
  padding: 14px 10px;
  text-transform: uppercase;
}

.jumbotron {
    margin-top: 64px;
  background-image:url('../media/science/387505.jpg.png');
  height: 436px;
  background-repeat: no-repeat;
  background-size: cover;
  background-attachment: fixed;
  color: #fff;
  text-shadow: 0px 0px 15px rgba(0,0,0,0.7);
}
.jumbotron .container {
    text-align: center;
    position: relative;
    top: 50%; left: 50%;
    margin-top: -80px;
    margin-left: -400px;
    width: 800px;
    height: 400px;
}

.table .btn {
 width: 100%;
 height: 50px;
 font: 12px Arial, Helvetica, sans-serif;
 border-radius: 15px;
 }

 .table .btn:hover {
 background: #FF9966;
 }

.btn {
    background-color: rgb(51, 102, 153);
    width: 150px;
    height: 50px;
    padding: 15px;
    color: #fff;
}


.container {
    text-align: center;
}

.col-md-3 {
    text-align: center;
    padding: 10px;
}