body {
  background-color: #31c17f;
}

header {
  background-color: #49e19cc0;
}

h1::after {
  background-color: #841cde;
  box-shadow: 0 1px 0 #6519a7;
  text-shadow: 0 -1px 0 #6519a7;
}

section.instructions,
a.clicky + p {
  color: #296644;
}

input[type='checkbox']:checked {
  background-color: #6519a7;
}