body {
  background: #0d1117 url('images/cubes.png');
  /*color: #c9d1d9;*/
}

header {
  background: #161b22;
  color: #58a6ff;
  border-bottom: 2px solid #58a6ff;
  box-shadow: inset -2px -2px #58a6ff, inset 2px 2px #0d1117;
}

nav a {
  color: #58a6ff;
  background-color: #21262d;
}

nav a:hover {
  background-color: #58a6ff;
  color: black;
}

h1, h2, h3 {
  background-color: #58a6ff;
  color: black;
}