:root{--demo-bg:#0e1117;--demo-surface:#161b22;--demo-ink:#e6edf3;--demo-accent:#4ea1ff;--demo-radius:10px;--demo-gap:16px}.demo-card{background:var(--demo-surface);color:var(--demo-ink);border-radius:var(--demo-radius);padding:var(--demo-gap);margin-bottom:var(--demo-gap)}.demo-card h2{margin:0 0 var(--demo-gap);font-size:1.1rem;font-weight:600}.demo-card a{color:var(--demo-accent);text-decoration:none}.demo-card a:hover{text-decoration:underline}