html, body {
  position: relative;
  width: 100%;
  min-height: 100vh;
}

body {
  background-color: #333;
  background-image: url(/galaxy.jpg);
  background-attachment: fixed;
  background-size: cover;
  background-position: center center;
  color: #fff;
  margin: 0;
  padding: 1rem;
  font-size: 16px;
  line-height: 1.67;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
}

pre, code {
  font-family: 'Operator Mono', 'JetBrains Mono', 'Fira Code', 'SFMono-Regular', Menlo, Consolas, monospace;
}

a {
  color: rgb(0,100,200);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

a:visited {
  color: rgb(0,80,160);
}

label {
  display: block;
}

input, button, select, textarea {
  font-family: inherit;
  font-size: inherit;
  padding: 0.4em;
  margin: 0 0 0.5em 0;
  box-sizing: border-box;
  border: 1px solid #ccc;
  border-radius: 2px;
}

input:disabled {
  color: #ccc;
}

input[type="range"] {
  height: 0;
}

button {
  color: #333;
  background-color: #f4f4f4;
  outline: none;
}

button:disabled {
  color: #999;
}

button:not(:disabled):active {
  background-color: #ddd;
}

button:focus {
  border-color: #666;
}

blockquote {
  background-color: hsl(15, 100%, 50%, 0.1);
  color: #fff;
  margin: 0 -1rem;
  padding: 1px 1rem;
  box-sizing: border-box;
}

@media (min-width: 640px) {
  blockquote {
    margin: 0 -3rem;
    padding: 1px 3rem;
  }
}