.underline {
  border-bottom: 2px solid currentColor;
  display: inline-block;
  line-height: 0.85;
  text-shadow:
    2px 2px white,
    2px -2px white,
    -2px 2px white,
    -2px -2px white;
}

// ----- Unrelated ----- //

html {
  background: white;
  line-height: 1;
  font-family: 'Source Sans Pro', sans-serif;
  font-size: 48px;
  padding: 0 20px;
}

body {
  align-content: center;
  align-items: center;
  display: flex;
  margin-left: auto;
  margin-right: auto;
  max-width: 600px;
  min-height: 100vh;
}

p {
  margin: 0;
}