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

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.5rem;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--fg);
}

.card {
  width: min(560px, 100%);
  background: var(--card);
  border: 1px solid #334155;
  border-radius: 14px;
  padding: 2rem;
  box-shadow: 0 20px 40px rgb(0 0 0 / 0.35);
}

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

.subtitle {
  margin: 0.25rem 0 1.5rem;
  color: var(--muted);
}

button {
  border: 0;
  border-radius: 9px;
  padding: 0.65rem 1.1rem;
  font: inherit;
  font-weight: 600;
  color: #04263a;
  background: var(--accent);
  cursor: pointer;
}

button:hover {
  filter: brightness(1.08);
}

pre {
  margin: 1rem 0 0;
  padding: 1rem;
  min-height: 4.5rem;
  border-radius: 9px;
  background: #0b1220;
  border: 1px solid #334155;
  overflow-x: auto;
  font-size: 0.85rem;
}

code {
  color: var(--accent);
}

.links {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  margin: 1.5rem 0 0;
  padding: 0;
  font-size: 0.9rem;
}

.links a {
  color: var(--accent);
  text-decoration: none;
}

.links a:hover {
  text-decoration: underline;
}