meter{margin:1 auto 1em;width:100%;background:none;background-color:transparent;}meter::-webkit-meter-bar{background:none;background-color:transparent;}meter[value="1"]::-webkit-meter-optimum-value{background:red;}meter[value="2"]::-webkit-meter-optimum-value{background:yellow;}meter[value="3"]::-webkit-meter-optimum-value{background:orange;}meter[value="4"]::-webkit-meter-optimum-value{background:green;}meter[value="1"]::-moz-meter-bar{background:red;}meter[value="2"]::-moz-meter-bar{background:yellow;}meter[value="3"]::-moz-meter-bar{background:orange;}meter[value="4"]::-moz-meter-bar{background:green;}