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

html * {
  position: relative;
  box-sizing: border-box;
}

body {
  --border-radius: 5px;
  --do-something: #7fdbff;
  --do-something-lighter: rgb(166, 230, 255);

  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
    Oxygen-Sans, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;
  background: #222;
  color: #eee;
  margin: 0;
  font-size: 14px;
}

p {
  line-height: 1.5;
}

a {
  color: var(--do-something);
  text-decoration: none;
}

button {
  font-family: inherit;
  font-size: inherit;
  background: var(--do-something);
  color: #222;
  border: none;
  border-radius: var(--border-radius);
  margin: 0 0 0.5em 0;
  padding: 0.5em 1em;
  line-height: 1;
}

button:not(:disabled):hover {
  background-color: var(--do-something-lighter);
}

@media (min-width: 480px) {
  body {
    font-size: 16px;
  }
}