h1 {
  line-height: 1;
}

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

// ----- Unrelated ----- //
    
html {
  $square-color: #eee;
  $square-size: 8px;
  line-height: 1;
  background-image:
    linear-gradient(45deg, $square-color 25%, transparent 25%, transparent 75%, $square-color 75%, $square-color), 
    linear-gradient(45deg, $square-color 25%, transparent 25%, transparent 75%, $square-color 75%, $square-color);
  background-position: 0 0, $square-size $square-size;
  background-size: ($square-size * 2) ($square-size * 2);
  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;
}