:root { --accent: #2b6cb0; --bg: #f7fafc; --ink: #1a202c; }

* { box-sizing: border-box; }

body {
  font-family: system-ui, -apple-system, sans-serif;
  max-width: 720px;
  margin: 2rem auto;
  padding: 0 1rem;
  color: var(--ink);
  line-height: 1.5;
}

header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  border-bottom: 2px solid var(--accent);
  padding-bottom: 0.75rem;
}

h1 { font-size: 1.3rem; margin: 0; }

.badge {
  display: inline-block;
  background: var(--accent);
  color: white;
  font-weight: 600;
  letter-spacing: 0.05em;
  padding: 0.3rem 0.7rem;
  border-radius: 4px;
}

main { background: var(--bg); padding: 1rem 1.25rem; border-radius: 8px; margin-top: 1rem; }

code { background: #edf2f7; padding: 0.1rem 0.35rem; border-radius: 3px; font-size: 0.9em; }

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

.hint { font-size: 0.9rem; color: #4a5568; }

footer { margin-top: 1.5rem; font-size: 0.85rem; color: #718096; }