:root {
  --bg: #f4f6f8;
  --surface: #ffffff;
  --ink: #17202a;
  --muted: #5b6b7c;
  --accent: #2f6f8f;
  --line: #e2e8ee;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #11161b;
    --surface: #182027;
    --ink: #e8eef4;
    --muted: #9aacbd;
    --accent: #7fb6d2;
    --line: #27323c;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: var(--bg);
  color: var(--ink);
  font-family: Georgia, "Times New Roman", serif;
  line-height: 1.6;
}

.card {
  width: 100%;
  max-width: 620px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 48px 40px;
  text-align: center;
  box-shadow: 0 10px 40px rgba(23, 32, 42, 0.06);
}

.eyebrow {
  margin: 0 0 12px;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}

h1 {
  margin: 0;
  font-size: clamp(1.6rem, 5vw, 2.25rem);
  font-weight: 400;
  letter-spacing: 0.01em;
}

.subtitle {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 1rem;
}

hr {
  width: 56px;
  margin: 32px auto;
  border: 0;
  border-top: 1px solid var(--line);
}

.notice h2 {
  margin: 0 0 8px;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 1.05rem;
  font-weight: 600;
}

.notice p {
  margin: 0;
  color: var(--muted);
}

.notice.secondary {
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.notice.secondary h2,
.notice.secondary p { opacity: 0.8; }

footer {
  margin-top: 36px;
  color: var(--muted);
}

@media (max-width: 480px) {
  .card { padding: 36px 24px; }
}