:root {
  --bg: #f7f7f5;
  --text: #1c1c1a;
  --muted: #5c5c57;
  --link: #1d4ed8;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161615;
    --text: #ededea;
    --muted: #a3a39d;
    --link: #93b4ff;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px 16px;
  background: var(--bg);
  color: var(--text);
  font: 400 1.0625rem/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

main { max-width: 36rem; }

h1 {
  margin: 0 0 8px;
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  font-weight: 600;
  letter-spacing: -0.01em;
}

p { margin: 0; color: var(--muted); }

a { color: var(--link); }
a:focus-visible { outline: 2px solid var(--link); outline-offset: 2px; }