:root {
  color-scheme: light dark;
  --bg: #f5f5f7;
  --card-bg: #ffffff;
  --text: #1a1a1a;
  --muted: #6b6b6b;
  --accent: #6364ff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14141a;
    --card-bg: #1e1e26;
    --text: #f2f2f2;
    --muted: #a0a0a8;
    --accent: #9c9cff;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  padding: 2rem 1rem;
}

.card {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 2.5rem;
  max-width: 420px;
  width: 100%;
  text-align: center;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
}

h1 {
  margin: 0 0 0.5rem;
  font-size: 1.75rem;
}

.tagline {
  margin: 0 0 1.5rem;
  color: var(--muted);
}

.links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.links a {
  display: block;
  padding: 0.65rem 1rem;
  border-radius: 10px;
  background: var(--bg);
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.links a:hover {
  transform: translateY(-1px);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

footer {
  color: var(--muted);
  font-size: 0.85rem;
}