html {
  line-height: 1; }

body {
  align-items: center;
  background-color: #111;
  display: flex;
  font-family: Helvetica Neue, sans-serif;
  height: 100vh;
  justify-content: center;
  margin: 0;
  padding: 0;
  text-align: center; }

h1 {
  color: #00caff;
  font-weight: 100;
  font-size: 8em;
  margin: 0;
  padding-bottom: 15px; }

button {
  background: #111;
  border: 1px solid #00caff;
  color: #00caff;
  font-size: 2em;
  font-weight: 100;
  margin: 0;
  outline: none;
  padding: 5px 15px;
  transition: background .2s; }
  button:hover, button:active, button:disabled {
    background: #00caff;
    color: #111; }
  button:active {
    outline: 2px solid #00caff; }
  button:focus {
    border: 1px solid #00caff; }

button + button {
  margin-left: 3px; }