:root { color-scheme: light dark; --fondo: #fafafa; --texto: #1a1a1a; --suave: #5f5f5f; }
@media (prefers-color-scheme: dark) { :root { --fondo: #141414; --texto: #f2f2f2; --suave: #a8a8a8; } }
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; display: grid; place-items: center; padding: 16px; background: var(--fondo); color: var(--texto); font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; text-align: center; }
h1 { margin: 0 0 .4em; font-size: clamp(2rem, 7vw, 3.5rem); font-weight: 700; }
p { margin: 0; font-size: 1.125rem; color: var(--suave); }