:root {
  --darkest: #181818;
  --lightest: #ededed;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--darkest);
  color: var(--lightest);
  text-align: center;
  font-family: sans-serif;
  font-size: 18px;
}

main {
  height: 100vh;
  width: 100vw;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
}

button {
  cursor: pointer;
}

.intro {
  h1 {
    margin-bottom: 100px;
  }

  button {
    font-size: 20px;
    height: 150px;
    width: 150px;
    border-radius: 50%;
  }
}

.hidden {
  display: none;
}