@import url('https://fonts.googleapis.com/css?family=Fira+Sans:300');
body {
  font-family: 'Fira Sans', sans-serif;
  line-height: 1.6;
  color: #222;
  max-width: 50rem;
  padding: 2rem;
  margin: auto;
  background: #fdfdfd;
}
img {
  max-width: 100%;
}
a {
  color: #18a1cd;
 /* color: #2ECC40; */
  text-decoration: none;
}
h1, h2, strong {
  color: #111;
}
blockquote {
  margin-top: 10px;
  margin-bottom: 10px;
  margin-left: 50px;
  padding-left: 15px;
  border-left: 3px solid #ccc;
}

code {
    background-color: #eee;
    border-radius: 3px;
    font-family: courier, monospace;
    padding: 0 3px;
}

 /* Tooltip container */
.tooltip {
  position: relative;
  display: inline-block;
  border-bottom: 1px dotted black; /* If you want dots under the hoverable text */
}

/* Tooltip text */
.tooltip .tooltiptext {
  visibility: hidden;
  width: 250px;
  background-color: #555;
  color: #fff;
  text-align: center;
  padding: 5px 5px;
  border-radius: 6px;

  /* Position the tooltip text */
  position: absolute;
  z-index: 1;
  bottom: 125%;
  left: 50%;
  margin-left: -60px;

  /* Fade in tooltip */
  opacity: 0;
  transition: opacity 0.3s;
}

/* Tooltip arrow */
.tooltip .tooltiptext::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  margin-left: -5px;
  border-width: 5px;
  border-style: solid;
  border-color: #555 transparent transparent transparent;
}

/* Show the tooltip text when you mouse over the tooltip container */
.tooltip:hover .tooltiptext {
  visibility: visible;
  opacity: 1;
}