:root {
  --brand: #0071e3;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --surface: #f5f5f7;
  --border: #e5e7eb;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  line-height: 1.6;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
}

.site-header nav a {
  margin-left: 18px;
  color: var(--muted);
  text-decoration: none;
}

.site-header nav a:hover { color: var(--brand); }

main {
  max-width: 860px;
  margin: 0 auto;
  padding: 40px 24px 64px;
}

.hero { text-align: center; padding: 48px 0 32px; }
.hero h1 { font-size: 2.2rem; margin: 0 0 12px; }
.lead { font-size: 1.15rem; color: var(--muted); }
.note { color: var(--brand); font-weight: 600; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
}

.card h2 { font-size: 1.05rem; margin: 0 0 8px; }
.card p { margin: 0; color: var(--muted); font-size: 0.95rem; }

.prose h1 { margin-bottom: 4px; }
.prose .updated { color: var(--muted); font-size: 0.9rem; }
.prose h2 { margin-top: 28px; }

.faq .qa { margin-bottom: 20px; }
.qa h3 { font-size: 1rem; margin-bottom: 4px; }
.qa p { margin: 0; color: var(--muted); }

.contact { margin-top: 32px; }

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

.site-footer {
  border-top: 1px solid var(--border);
  padding: 20px 24px;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}
.site-footer a { color: var(--muted); text-decoration: none; }
.site-footer a:hover { color: var(--brand); }