:root{
  --Bg: white;
  --Modal: rgba(0,0,0,0.1);
  --Text: black;
}

body {
  background: var(--Bg);
  font-weight: 'bold';
  text-align: center;
}

div {
  background: var(--Modal);
  border-radius: 10px;
  padding: 20px;
  margin: 0 auto;
  max-width: 400px;
}

p {
  color: var(--Text);
  font-family: sans-serif;
  font-weight: 600;
  text-transform: uppercase;
}

@media(prefers-color-scheme: dark) {
  :root{
    --Bg: black;
    --Modal: rgba(255,255,255,0.1);
    --Text: hotpink;
  }
}