css3/menu-fill-hover.html

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <title>Menu Fill Hover</title>
  <style>
    @import url("https://fonts.googleapis.com/css?family=Raleway:400,400i,700");

    body {
      display: -webkit-box;
      display: flex;
      height: 100vh;
      -webkit-box-pack: center;
      justify-content: center;
      -webkit-box-align: center;
      align-items: center;
      text-align: center;
      background: #1A1E23;
    }
    ul {
      display: -webkit-box;
      display: flex;
      -webkit-box-orient: vertical;
      -webkit-box-direction: normal;
      flex-direction: column;
      -webkit-box-align: start;
      align-items: start;
      list-style-type: none;
    }
    ul li {
      padding: 6px 0;
    }
    ul li a {
      --fill-color: #198CE6;
      position: relative;
      display: block;
      padding: 4px 0;
      font: 700 3rem Raleway, sans-serif;
      text-decoration: none;
      text-transform: uppercase;
      -webkit-text-stroke: 2px var(--fill-color);
      background: -webkit-gradient(linear, left top, left bottom, color-stop(0, var(--fill-color))) left/0 no-repeat;
      background: linear-gradient(var(--fill-color) 0 100%) left/0 no-repeat;
      color: transparent;
      -webkit-background-clip: text;
      background-clip: text;
      -webkit-transition: 0.5s linear;
      transition: 0.5s linear;
    }

    ul li a:hover {
      background-size: 100%;
    }
  </style>
</head>

<body>
  <ul>
    <li><a href="#">home</a></li>
    <li><a href="#">archives</a></li>
    <li><a href="#">tags</a></li>
    <li><a href="#">categories</a></li>
    <li><a href="#">about</a></li>
  </ul>
</body>


</html>