:root {
  color-scheme: dark;

  --background: #0b0d10;
  --surface: #12151a;
  --border: #282d35;
  --text: #f4f5f7;
  --muted: #a0a7b2;
  --accent: #ffffff;
  --accent-text: #101216;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

.page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 2rem;
}

.notice {
  width: min(100%, 620px);
  padding: 3.5rem;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--surface);
  text-align: center;
}

.status {
  display: inline-block;
  margin: 0 0 1.5rem;
  padding: 0.45rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(2.8rem, 10vw, 5rem);
  line-height: 1;
  letter-spacing: -0.055em;
}

.message {
  max-width: 480px;
  margin: 2rem auto 0;
  color: var(--text);
  font-size: 1.15rem;
  line-height: 1.7;
}

.secondary {
  max-width: 450px;
  margin: 0.75rem auto 0;
  color: var(--muted);
  line-height: 1.7;
}

.github-link {
  display: inline-block;
  margin-top: 2rem;
  padding: 0.85rem 1.25rem;
  border-radius: 9px;
  background: var(--accent);
  color: var(--accent-text);
  font-weight: 700;
  text-decoration: none;
  transition:
    transform 150ms ease,
    opacity 150ms ease;
}

.github-link:hover {
  transform: translateY(-2px);
  opacity: 0.9;
}

.github-link:focus-visible {
  outline: 3px solid var(--text);
  outline-offset: 4px;
}

@media (max-width: 600px) {
  .page {
    padding: 1rem;
  }

  .notice {
    padding: 2.5rem 1.5rem;
  }
}