html, body {
  width: 100%;
  height: 100%;
}

body { 
  margin: 0; 
  box-sizing: border-box;
  background: url(https://s3.amazonaws.com/rafaelceron/nyc.jpg) no-repeat center center fixed; 
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
  font-family: 'Roboto', sans-serif;
  padding: 20px;
}

h1 { 
  font-size: 4rem;
  text-transform: uppercase;
  margin-top: 0;
  letter-spacing: .1rem;
  margin-bottom: 10px;
  border-bottom: 1px solid #bbb;
}

h3 {
  font-size: 2.5em;
  letter-spacing: .1em;
  margin: 20px 0 5px;
}

p {
  font-size: 1.5rem;
  margin: 20px 0 5px;
}

.container { 
  color: #eee;
  font-weight: 100;
  text-shadow: 2px 2px #333;
  background: rgba(0, 0, 0, 0.6);

  min-height: 100%;
  display: flex;
  flex-direction: column;
  align-items: stretch;
}

.intro {
  flex-grow: 1;
  flex-shrink: 0;
  padding: 30px;
}

footer {
  flex-shrink: 0;
  padding: 30px;

  display: flex;
  justify-content: space-between;
}

.copyright {
  font-family: 'Roboto', sans-serif;
  color: #999;
  display: flex;
  align-items: center;
}