System theme aware

System theme aware: a CSS card. Copy the rules, or the prompt that rebuilds it.

dark-modethemetokensmedia-queryadaptive

Adaptive

Follows the system theme

Same markup, swapped custom properties under prefers-color-scheme: dark.

CSS

.card-048 {
  --bg: #fff;
  --fg: #111827;
  --muted: #6b7280;
  --line: #e5e7eb;
  --accent: #2563eb;
  width: 290px;
  padding: 22px;
  background: var(--bg);
  color: var(--fg);
  border: 1px solid var(--line);
  border-radius: 14px;
  font-family: system-ui,sans-serif;
  transition: background .3s,color .3s,border-color .3s
}
@media (prefers-color-scheme:dark) {
  .card-048 {
    --bg: #111827;
    --fg: #f9fafb;
    --muted: #9ca3af;
    --line: #374151;
    --accent: #60a5fa
  }
}
.card-048__label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--accent)
}
.card-048 h3 {
  margin: 6px 0;
  font-size: 18px
}
.card-048 p {
  margin: 0;
  font-size: 14px;
  line-height: 1.5;
  color: var(--muted)
}
.card-048:hover {
  border-color: var(--accent)
}

HTML

<article class="card-048">
  <span class="card-048__label">Adaptive</span>
  <h3>Follows the system theme</h3>
  <p>Same markup, swapped custom properties under prefers-color-scheme: dark.</p>
</article>

Prompt

Build a 290px card driven entirely by custom properties: --bg #fff, --fg #111827, --muted #6b7280, --line #e5e7eb, --accent #2563eb in light mode, and under @media (prefers-color-scheme: dark) swap them to #111827, #f9fafb, #9ca3af, #374151, #60a5fa. Card has 22px padding, 14px radius, 1px border in --line that becomes --accent on hover, an uppercase 11px label in --accent, 18px title, 14px --muted text, and 300ms transitions on color changes.

System theme aware

Follows the system theme

Same shelf

light-dark() in one line

Sized by the parent