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                <h1>Field tooltips</h1>
  <li>tooltip appears on hover via an icon</li>
  <li>should be available to keyboard users as well (eg on focus)</li>
  <li>useful to SR users to describe the input</li>
  <li>No JS!</li>
  <li>for mobile support (which would required JS), see <a href="" target="_blank">this example</a>

<label for="address">
  <span class="visuallyhidden">Address</span>

<input id="address" type="text" placeholder="address" aria-describedby="Tooltip" />

<span tabindex="0" class="btn-tooltip" id="Tooltip" role="tooltip">
  <i class="fa fa-bolt icon" aria-hidden="true"></i>
  <span class="tooltip-content">here's some information.</span>


                // font awesome added for icon

body {
  padding: 20px;

ul {
  margin-bottom: 20px;

input {
  padding: 5px;
  border: 1px solid #999;
  border-radius: 2px;

.visuallyhidden {
  border: 0;
  clip: rect(0 0 0 0);
  height: 1px;
  margin: -1px;
  overflow: hidden;
  padding: 0;
  position: absolute;
  width: 1px;

.showvisuallyhidden {
  clip: auto;
  overflow: visible;

.btn-tooltip {
  border: none;
  background: none;
  position: relative;

.tooltip-content {
  @extend .visuallyhidden;
  height: auto;
  display: block;
  position: absolute;
  // styling specific to this example
  bottom: 130%;
  left: 50%;
  z-index: 200;
  width: 180px;
  margin: 0 0 5px -90px;
  padding: 0.75em 1em;
  text-align: center;
  color: #FFF;
  font-size: 12px;
  border-radius: 4px;
  background-color: #474747;
  transition: all 0.3s cubic-bezier(0.3, 0, 0, 1);
  transform: rotateX(20deg) scale(0.8);
  transform-origin: center 120%;
  -webkit-backface-visibility: hidden;
  opacity: 0;

.btn-tooltip {
  display: inline-block;
  text-align: center;
  // nice big hit area
  min-width: 40px;
  &:hover {
    .tooltip-content {
      @extend .showvisuallyhidden;
      // styling specific to this example
      transform: rotateX(0deg) scale(1);
      opacity: 1;

::-webkit-input-placeholder {
 color: #767676;
::-moz-placeholder {  
 color: #767676;