:root {
  color-scheme: light dark;
  --fg: #1c1c1c;
  --bg: #fafafa;
  --muted: #555;
  --accent: #2563eb;
  --accent-fg: #fff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --fg: #e8e8e8;
    --bg: #16181c;
    --muted: #9aa0a6;
    --accent: #3b82f6;
  }
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: system-ui, -apple-system, "Hiragino Sans", "Noto Sans JP", sans-serif;
  color: var(--fg);
  background: var(--bg);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}
main {
  max-width: 34rem;
  text-align: center;
}
h1 {
  font-size: 2.5rem;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}
p {
  color: var(--muted);
  line-height: 1.9;
  margin-bottom: 0.75rem;
}
.status {
  display: inline-block;
  margin-top: 1.5rem;
  padding: 0.75rem 2.5rem;
  border-radius: 0.5rem;
  border: 1px solid var(--muted);
  font-weight: 600;
}