* { box-sizing: border-box; }
body { background-color:#222; color:#fff;}
.container {
  width: 960px;
  margin: 350px auto;
}

.bng-button {
  padding: 10px;
  background: #ffa800;
  display: inline-block;
  position: relative;
}

.bng-tooltip {
  position: relative;
  cursor: pointer;
}

span.bng-arrow {
  width: 0;
  height: 0;
  margin-left: -8px;
  border-style: solid;
  position: absolute;
  left: 50%;
  line-height: 0px;
}

.bng-arrow-down {
  border-width: 8px 8px 0 8px;
  border-color: #da2e2b transparent transparent transparent;
  top: 100%;
}

.bng-arrow-up {
  border-width: 0 8px 8px 8px;
  border-color: transparent transparent #da2e2b transparent;
  top: -8px;
}

#bngTooltip {
  font-style: italic;
  font-weight: bold;
  padding: 10px;
  text-align: center;
  position: absolute;
  display: none;
}

#bngTooltip img { width: 100%; }