<!DOCTYPE html>
<html>
<head>
  <title>A11y Test Bed - Range Slider</title>
  <style> 
    .styled-test-slider-container {
      width: 129px;
      height: 8px;
      background-color: #0075ff;
      display: inline-block;
      margin: 2px;
      border-radius: 8px;
      background-size: 125px 8px;
    }

    .styled-test-slider {
      display: inline-block;
      width: 16px;
      height: 16px;
      border-radius: 50%;
      background-color: #0075ff;
      position: relative;
      left: calc(50% - 