:root {
  color-scheme: light dark;
  --tinta: #1d252b;
  --fundo: #ffffff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --tinta: #e6ebee;
    --fundo: #151b20;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: var(--fundo);
  color: var(--tinta);
  font: 400 16px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif;
}

main { padding: 24px; text-align: center; }
h1 { font-size: clamp(28px, 6vw, 44px); margin: 0 0 8px; }
p { margin: 0; opacity: 0.7; }
a { color: inherit; }