album.css

body {
  min-height: 75rem; /* Can be removed; just added for demo purposes */
}


.header {
  background-color: #F1F1F1;
  text-align: center;
  padding: 20px;  
}

/* The navbar container */
.topnav {
  overflow: hidden;
  background-color: #333;
}

/* Navbar links */
.topnav a {
  float: left;
  display: block;
  color: #f2f2f2;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}

/* Links - change color on hover */
.topnav a:hover {
  background-color: #ddd;
  color: black;
}


.jumbotron {
  padding-top: 6rem;
  padding-bottom: 6rem;
  margin-bottom: 0;
  background-color: #fff;
}

.jumbotron p:last-child {
  margin-bottom: 0;
}

.jumbotron-heading {
  font-weight: 300;
}

.jumbotron .container {
  max-width: 40rem;
}

.album {
/*  min-height: 50rem; *//* Can be removed; just added for demo purposes */
  padding-top: 3rem;
  padding-bottom: 3rem;
  background-color: #f7f7f7;
}

.card {
  float: left;
  /*width: 33.333%;*/
  width: 50.0%;
  /*padding: .75rem;*/
  padding: 1.5rem;
  margin-bottom: 2rem;
  border: 0;
}

.card > img {
  margin-bottom: .75rem;
}

.card-text {
  font-size: 85%;
}

footer {
  padding-top: 3rem;
  padding-bottom: 3rem;
}

footer p {
  margin-bottom: .25rem;
}