chromium/third_party/blink/web_tests/wpt_internal/html/semantics/forms/the-meter-element/reference/meter-rendering-ref.html

<!doctype html>
<title>meter rendering</title>
<style>
  #meter {
    block-size: 1em;
    box-sizing: border-box;
    display: inline-block;
    inline-size: 5em;
    vertical-align: -0.2em;
  }

  #inner {
    block-size: 100%;
    box-sizing: inherit;
    display: grid;
    grid-template-rows: 1fr [line1] 2fr [line2] 1fr;
    inline-size: 100%;
    position: relative;
  }

  #bar {
    align-self: unsafe center;
    background: light-dark(#efefef, #3B3B3B);
    block-size: 100%;
    border-radius: 20px;
    border: thin solid light-dark(rgba(118, 118, 118, 0.3), #858585);
    box-sizing: border-box;
    grid-row-end: line2;
    grid-row-start: line1;
    inline-size: 100%;
    overflow: hidden;
    position: absolute;
  }
</style>

<div id="meter">
  <div id="inner">
    <div id="bar">
    </div>
  </div>
</div>