html {
  background: #111;
}

body {
  margin: 0;
  color: #ddd;
  background: #111;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

main {
  width: min(620px, calc(100% - 40px));
  margin: 70px auto;
}

h1 {
  margin: 0;
  font-size: 28px;
  font-weight: normal;
  letter-spacing: 1px;
}

h2 {
  margin-top: 0;
  font-size: 22px;
  font-weight: normal;
}

p {
  margin: 16px 0;
}

a {
  color: #9cbcff;
}

a:visited {
  color: #c5a3e8;
}

a:hover {
  color: white;
}

hr {
  border: 0;
  border-top: 1px solid #444;
  margin: 26px 0;
}

.small {
  color: #888;
  margin-top: 4px;
  font-size: 14px;
}

.tiny {
  color: #666;
  font-size: 12px;
}

.links {
  line-height: 1.8;
}

.box {
  border: 1px solid #555;
  padding: 14px 16px;
  margin: 22px 0;
}

input,
button {
  font: inherit;
}

input[type="text"] {
  width: 170px;
  padding: 5px 7px;
  color: #ddd;
  background: #181818;
  border: 1px solid #555;
}

button {
  padding: 5px 9px;
  color: #ddd;
  background: #222;
  border: 1px solid #666;
  cursor: pointer;
}

button:hover {
  background: #333;
}

button:disabled {
  color: #666;
  cursor: default;
  background: #171717;
  border-color: #333;
}

.back {
  margin-top: 34px;
  font-size: 14px;
}

.note {
  color: #999;
  font-size: 14px;
}

@media (max-width: 600px) {
  main {
    margin-top: 36px;
  }
}