index.css

* {
  margin: 0;
  padding: 0;
}

*:focus {
  outline: 3px ridge var(--primary-fade);
}

::selection {
  color: #000;
  background: #fff;
}

a {
  color: #ffffff;
}

a:hover {
}

html {
  height: 100%;
}

body {
  font-family: 'Work Sans';
  font-weight: 300;
  color: #ffffff;
  background-color: #000;
  padding: 100px 10vw 50px;
}

a {
  text-decoration: none;
  background-image: linear-gradient(#fff, #fff);
  background-size: 100% 2px;
  background-repeat: no-repeat;
  background-position: 0 100%;
  transition: color 0.2s, background-size 0.2s;
}

a:hover {
  background-size: 100% 100%;
  color: #000000;
}

h1 {
  font-weight: 200;
  font-size: 30px;

  text-transform: uppercase;
  letter-spacing: 2px;
  line-height: 1.18;
  margin-bottom: 80px;
}

h1 a {
  background-size: 100% 3px;
}

ul {
  font-size: 20px;
  line-height: 1.3;
  list-style: none;
}

ul li {
  padding: 10px 0;
}

.github-icon {
  width: 20px;
  height: 20px;
}

ul .github-link {
  display: none;
}

ul li:hover .github-link {
  display: inline;
}

.github-link {
  background-image: none;
}

.github-link:hover {
  color: #ffffff;
}

@media screen and (min-width: 700px) {
  h1 {
    font-size: 70px;
  }
  h1 a {
    background-size: 100% 10px;
  }
}