Specifc Slider Style

I am currently trying to style an html slider so that it looks something similar to this:

Desired Result

However, my styling isn’t working out and the slider thumb gets too close to the edge of the bar (ignoring the colors, not the concern right now):

Current result

I have done some research on how to do this, and Most of the styling here comes from that, but I still cannot get it to work properly, and haven’t been able to find a solution that works.

EDIT: Code Snippet Added

/* STUDY DAY SLIDER */
.days {
    -webkit-appearance: none;
    width: 25%;
    height: 30px;
    border-radius: 20px;
    outline: none;
    background-color: green;
    -webkit-transition: 0.2s;
    transition: opacity 0.2s;
  }

  .days::-webkit-scrollbar-track {

  }
  
  .days::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: 0;
    background-color: red;
    cursor: pointer;
  }

  .days::-webkit-slider-thumb::before {
    content: var(--thumbContent);
    color: white;
  }
  
  .days::-moz-range-thumb {
    -webkit-appearance: none;
    width: 30px;
    height: 30px;
    border: 0;
    cursor: pointer;
  }
<!DOCTYPE html>
<html>
    <head>
        <link href="./example.css" rel="stylesheet" type="text/css" />
    </head>
    <body>
        <input type="range" min="1" max="100" class="topic-row-style days" id="topic-row-style">
    </body>
</html>