Inline css is being erased in text editor when I save. It creates an ugly html button that leads nowhere

I'm trying to add a button to my html text editor on a category page in Lightspeed Retail. I can make the code work in js fiddle just fine, but when I put the code into the text editor, it doesn't work. When I save it, it ereases everything and gives me a html button that leads nowhere. I'm incredibly new to trying to figure this stuff out, so it's a bit daunting.

I tried to create a seperate css to reference, but it is above my understanding. I am trying to stick with inline since it seems to work in jsfiddle. If I must do external style sheet I may require some extra guidance.

(I had to erase from the code to get it to appear properly on here)

  .button {
    display: inline-block;
    border-radius: 4px;
    background-color: #c7057d;
    border: none;
    color: #FFFFFF;
    text-align: center;
    font-size: 28px;
    padding: 20px;
    width: 200px;
    transition: all 0.5s;
    cursor: pointer;
    margin: 5px;
  }

  .button span {
    cursor: pointer;
    display: inline-block;
    position: relative;
    transition: 0.5s;
  }

  .button span:after {
    content: '\00bb';
    position: absolute;
    opacity: 0;
    top: 0;
    right: -20px;
    transition: 0.5s;
  }

  .button:hover span {
    padding-right: 25px;
  }

  .button:hover span:after {
    opacity: 1;
    right: 0;
  }

</style>

Pink button that when moused over has a sliding effect, that leads to booking page for company.

Solution

You can create separate css file as follows;

      .button {
        display: inline-block;
        border-radius: 4px;
        background-color: #c7057d;
        border: none;
        color: #FFFFFF;
        text-align: center;
        font-size: 28px;
        padding: 20px;
        width: 200px;
        transition: all 0.5s;
        cursor: pointer;
        margin: 5px;
      }

      .button span {
        cursor: pointer;
        display: inline-block;
        position: relative;
        transition: 0.5s;
      }

      .button span:after {
        content: '\00bb';
        position: absolute;
        opacity: 0;
        top: 0;
        right: -20px;
        transition: 0.5s;
      }

      .button:hover span {
        padding-right: 25px;
      }

      .button:hover span:after {
        opacity: 1;
        right: 0;
      }

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <link rel="stylesheet" href="fittingbutton.css">
</head>
<body>
    <a href="https://allegrodanceboutique.simplybook.me/v2/"><button class="button" style="vertical-align:middle"><span>Book Now </span></button></a>
</body>
</html>

Note: you should past the css code in fittingbutton.css file and paste the html code in the separate .html file.

Update: In case the <span> is being erased, you can use <div> instead as follows;

      .button {
        display: inline-block;
        border-radius: 4px;
        background-color: #c7057d;
        border: none;
        color: #FFFFFF;
        text-align: center;
        font-size: 28px;
        padding: 20px;
        width: 200px;
        transition: all 0.5s;
        cursor: pointer;
        margin: 5px;
      }

      .button div {
        cursor: pointer;
        display: inline-block;
        position: relative;
        transition: 0.5s;
      }

      .button div:after {
        content: '\00bb';
        position: absolute;
        opacity: 0;
        top: 0;
        right: -20px;
        transition: 0.5s;
      }

      .button:hover div {
        padding-right: 25px;
      }

      .button:hover div:after {
        opacity: 1;
        right: 0;
      }

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <link rel="stylesheet" href="fittingbutton.css">
</head>
<body>
    <a href="https://allegrodanceboutique.simplybook.me/v2/"><button class="button" style="vertical-align:middle"><div>Book Now </div></button></a>
</body>
</html>