:root {
  --color-black: #363636;
  --color-white: #fefefe;

  --background-color: var(--color-white);
  --text-color: var(--color-black);
}

@media (prefers-color-scheme: dark) {
  :root {
    --background-color: var(--color-black);
    --text-color: var(--color-white);
  }
}

/* Example usage */
body {
  background-color: var(--background-color);
  color: var(--text-color);
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}

img {
  height: 2em;
}

p {
  font-size: 1em;
  margin-bottom: 20px;
}

a {
  color: var(--text-color);
  text-decoration: none;
  margin-left: 0.2em;
  margin-right: 0.2em;
}

h1 {
  font-size: 3em;
  margin-bottom: 20px;
}

.main {
  height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}