:root {
  color-scheme: light dark;
  --bg: #f5f5f7;
  --card-bg: #ffffff;
  --text: #1a1a1a;
  --muted: #666;
  --accent: #ee4d2d;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f0f10;
    --card-bg: #1c1c1e;
    --text: #f5f5f5;
    --muted: #a0a0a0;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  padding: 24px;
}

.card {
  width: 100%;
  max-width: 420px;
  background: var(--card-bg);
  border-radius: 20px;
  padding: 40px 28px;
  text-align: center;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
}

h1 {
  margin: 0 0 8px;
  font-size: 2rem;
  letter-spacing: -0.02em;
}

.tagline {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 0.95rem;
}

.desc {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.5;
}

.links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.link-btn {
  display: block;
  padding: 14px 20px;
  border-radius: 12px;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  transition: transform 0.15s ease, opacity 0.15s ease;
}

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

footer {
  margin-top: 32px;
  color: var(--muted);
  font-size: 0.8rem;
}