html {
  --bg: white;
  --text-color: #222;
  --nav-bg: #f5f6f7;
  --nav-border-color: #dbddec;
  --link-color: #0066cc;
  --link-color-visited: #5a2ca0;
}

body {
  font-family: Verdana, Geneva, Tahoma, sans-serif;
  line-height: 1.6;
  max-width: 65ch;
  margin: 0 auto;
  color: var(--text-color);
  background: var(--bg);
}

nav,
main {
  padding-left: 1em;
  padding-right: 1em;
}

nav {
  display: block;
  background: var(--nav-bg);
  border-bottom: 0.1em solid var(--nav-border-color);
  margin-bottom: 1em;
  margin-top: 0;
  padding-top: 0.4em;
  padding-bottom: 0.4em;
}

nav ul {
  display: flex;
  justify-content: space-between;
  list-style-type: none;
  padding: 0;
}

img {
  display: block;
  margin: 3rem auto;
  background: white;
  width: 75%;
  object-fit: contain;
  border-radius: 8px; /* optional: makes it look neat */
}

img.full-width {
  width: 100%;
}

a {
  color: var(--link-color);
}

a:visited {
  color: var(--link-color-visited);
}

@media (prefers-color-scheme: dark) {
  html {
    --bg: #181a1b;
    --text-color: #e4e4e4;
    --nav-bg: #202224;
    --nav-border-color: #2c2f31;
    --link-color: #4da6ff;
    --link-color-visited: #b085f5;
  }

  .dark-emoji {
    background: white;
  }
}