app.scss

html, body {
  font-family: Arial, sans-serif;
}

header nav a,
.admin > a[data-target="close"] {
  color: black;
  text-decoration: none;
  cursor: pointer;
  &:active,
  &:visited {
    color: black;
    text-decoration: none;
  }
  &:hover {
    color: blue;
  }
  &:focus {
    color: green;
  }
}

header {
  nav {
    display: flex;
    justify-content: flex-end;
  }
}

button {
  cursor: pointer;
}

p {
  &.correct,
  &.wrong {
    color: white;
  }
  &.correct {
    background-color: green;
  }
  &.wrong {
    background-color: red;
  }
}

.admin {
  border: 1px solid black;
  background-color: white;
  display: none;
  padding: 5px;
  &.open {
    display: inline-block;
    position: fixed;
    right: 0;
    top: 0;
  }
}