:root {
  --bg: #ffffff;
  --fg: #0f172a;
  --muted: #64748b;
  --accent: #2563eb;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0b1120; --fg: #e2e8f0; --muted: #94a3b8; --accent: #60a5fa; }
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}
.wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 16px;
}
.brand { display: flex; align-items: center; gap: 12px; font-weight: 600; font-size: 1.25rem; margin-bottom: 40px; }
h1 { font-size: clamp(2rem, 6vw, 3.25rem); line-height: 1.1; letter-spacing: -0.02em; margin: 0 0 16px; }
.lead { color: var(--muted); font-size: 1.125rem; margin: 0; }
a { color: var(--accent); }
.foot { padding: 24px 16px; text-align: center; color: var(--muted); font-size: 0.875rem; }