@keyframes heartbeat
{
  0%
  {
    transform: scale( .75 );
  }
  20%
  {
    transform: scale( 1 );
  }
  40%
  {
    transform: scale( .75 );
  }
  60%
  {
    transform: scale( 1 );
  }
  80%
  {
    transform: scale( .75 );
  }
  100%
  {
    transform: scale( .75 );
  }
}

.logo {
  animation: heartbeat 1s infinite;
}

.jumbotron {
  padding: 2vh;
}