:root {
  --bg: #fafaf9;
  --text: #1c1917;
  --muted: #78716c;
  --accent: #4f46e5;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0c0a09;
    --text: #f5f5f4;
    --muted: #a8a29e;
    --accent: #818cf8;
  }
}
* { box-sizing: border-box; margin: 0; }
html, body { height: 100%; }
body {
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}
main {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 2rem 1.5rem;
  max-width: 48rem;
  width: 100%;
  margin: 0 auto;
}
h1 {
  font-size: clamp(2.5rem, 9vw, 5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.05;
}
h1::after {
  content: "";
  display: block;
  width: 3rem;
  height: 4px;
  margin-top: 1.25rem;
  background: var(--accent);
  border-radius: 2px;
}
p {
  margin-top: 1.25rem;
  font-size: clamp(1.1rem, 3.5vw, 1.4rem);
  color: var(--muted);
}
footer {
  padding: 1.5rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--muted);
}