:root {
  --bg: #f8fafc;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --brand: #4f46e5;
  --brand-dark: #312e81;
  --border: #e2e8f0;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
}

.topbar {
  background: linear-gradient(135deg, #6366f1, #4f46e5);
  color: #fff;
  padding: 1rem 1.25rem;
  box-shadow: 0 2px 8px rgba(79, 70, 229, 0.25);
}

.topbar a {
  color: #fff;
  text-decoration: none;
  font-weight: 600;
}

.topbar nav {
  margin-top: 0.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  font-size: 0.9rem;
}

.topbar nav a {
  opacity: 0.95;
  font-weight: 500;
}

.wrap {
  max-width: 820px;
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.25rem 1.5rem;
  margin: 1rem 0;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.06);
}

h1 {
  color: var(--brand-dark);
  font-size: 1.85rem;
  margin: 0 0 0.5rem;
}

h2 {
  color: var(--brand-dark);
  font-size: 1.15rem;
  margin: 1.5rem 0 0.5rem;
}

.meta { color: var(--muted); font-size: 0.95rem; }

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

ul, ol { padding-left: 1.25rem; }

.steps {
  background: #f1f5f9;
  border-radius: 12px;
  padding: 1rem 1.25rem;
}

.footer {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 600px) {
  h1 { font-size: 1.5rem; }
  .wrap { padding: 1rem 0.75rem 2rem; }
}