body header.masthead {
  background-image: url('../../img/travel/boston.jpg');
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center;
  color: #fff;
  filter: contrast(125%);
}

div.intro-lead-in,
div.intro-heading {
  text-shadow: 2px 2px 0 black;
}

a.btn.btn-primary {
  text-shadow: 1px 1px 0 black;
}

body #mainNav {
  background-color: #000;
}

.rounded-circle {
  border-radius: 25%!important;
  background-color: #fff;
  background-size: cover;
  background-position: center;
}

img {
  vertical-align: middle;
  border-style: none;
}

.img-fluid {
  max-width: 100%;
  height: auto;
}