:root {
  color-scheme: light dark;
  --bg: #0f172a;
  --card: #1e293b;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #38bdf8;
}

* {
  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, Helvetica, Arial, sans-serif;
}

main {
  background: var(--card);
  padding: 2.5rem 3rem;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  text-align: center;
  max-width: 420px;
  width: 90%;
}

h1 {
  margin: 0 0 1.5rem;
  font-size: 1.75rem;
  letter-spacing: -0.02em;
}

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

li a {
  display: block;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  background: rgba(148, 163, 184, 0.08);
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
  transition: background 0.15s ease, color 0.15s ease;
}

li a:hover,
li a:focus-visible {
  background: var(--accent);
  color: var(--bg);
}