:root{--color-background:#121212;--color-text:#fff}@media (prefers-color-scheme:dark){:root{--color-background:#000;--color-text:#fff}}html,body{background-color:var(--color-background);color:var(--color-text);margin:0;padding:0;font-family:system-ui,sans-serif;font-size:16px}div{text-align:center;margin:20px auto}a{color:#1e90ff;text-decoration:none}p{padding:1rem;font-family:system-ui,sans-serif}