.nav {
  overflow: hidden;
  background-color: #333;  
  position: fixed;
  bottom: 0;
  width: 100%;
}

.nav a {
  float: left;
  display: block;
  color: #f2f2f2;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 17px;
}

a:hover{
  background-color: #4CAF50;
}

.modal-dialog-full{
    height:100%
}
.modal-content-full{
    height:90%
}
.modal-body-full{
    height:100%;
    overflow:auto
}