* { box-sizing: border-box; margin: 0; } :root { font-family: -apple-system, BlinkMacSystemFont, Segoe UI, Helvetica, Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji; font-size: 1rem; --user-font-scale: 1rem - 16px; font-size: clamp(0.875rem, 0.4626rem + 1.0309vw + var(--user-font-scale), 1.125rem); } body { padding: 4rem 2rem; width: 100vw; min-height: 100vh; display: grid; justify-content: center; background: #f9fafb; color: #111827; } @media (prefers-color-scheme: dark) { body { background: #111827; color: #fff; } }