:root {
  --bg: #0b1020;
  --fg: #e6e8ef;
  --accent: #6ea8fe;
  --muted: #9aa4bf;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
}

main {
  max-width: 42rem;
  padding: 2rem;
  text-align: center;
}

h1 {
  font-size: clamp(2rem, 6vw, 3.5rem);
  margin: 0 0 0.5rem;
  letter-spacing: -0.02em;
}

main.error h1 {
  color: var(--accent);
  font-size: clamp(4rem, 18vw, 9rem);
  margin: 0;
}

p { color: var(--muted); margin: 0.5rem 0; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }