.intensity .start { float: left; height: 10px; background: linear-gradient(to right, blue, green); }
.intensity .middle { float: left; height: 10px; background: green; }
.intensity .end { float: left; height: 10px; background: linear-gradient(to right, green, red); }
.intensity .clear { clear: both; color: gray; }
.intensity .numbers { margin-top: 8px; }
.intensity .number { float: left; text-align: center; color: gray; font-size: 12px; }
.intensity .number:first-child { color: #333; }
.intensity .number:last-child { color: #333; }