.cf:before,.cf:after{
  content:" ";
  display:table;
}
.cf:after{
  clear:both;
}
body{
  padding-top:70px;
}
.picture_card{
  text-align:center;
  padding:2%;
  box-shadow:1px 1px 3px;
  border-radius:5px;
}
.picture_card img{
  width:100%;
  max-width:200px;
  max-height:150px;
  margin-top:20px;
}
.picture_card:hover{
  -webkit-transform:scale(1.05);
  -moz-transform:scale(1.05);
  -o-transform:scale(1.05);
  -ms-transform:scale(1.05);
}
.navbar li:hover{
  background-color:#fff4d8;
}
#no_images{
  background:#F0F0F0;
  padding:20px;
  text-align:center;
  font-size:xx-large;
}