.meter {
	height: 20px;  /* Can be anything */
	position: relative;
	background: #565656;
	border-radius: 5px;
	padding: 10px;
}

.meter > span {
  left: 0;
  top: 0;
  display: block;
  height: 100%;
  border-radius: 5px;
  position: absolute;
  overflow: hidden;
  transition: width 1s ease-in-out;
}

.meter > .predicted {
  background-color: #5caa7f;
}

.meter > .used {
  background-color: #0099bc;
}

.meter > .overflow {
  background-color: #c33b26;
}