:root {
  --bg: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --line: #e5e7eb;
  --accent: #047857;
  --accent-soft: #ecfdf5;
  --code-bg: #0f172a;
  --code-text: #e2e8f0;
  --radius: 12px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: #f9fafb;
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.7;
  font-size: 17px;
}

main {
  max-width: 780px;
  margin: 0 auto;
  padding: 32px 20px 64px;
}

article {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 36px 32px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.breadcrumb {
  font-size: 14px;
  margin-bottom: 20px;
}

.breadcrumb a { color: var(--accent); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }

h1 {
  font-size: 30px;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin: 0 0 12px;
}

.meta {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 28px;
}

h2 {
  font-size: 20px;
  margin: 36px 0 12px;
  letter-spacing: -0.01em;
}

h3 { font-size: 17px; margin: 24px 0 8px; }

p { margin: 0 0 16px; }

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

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88em;
  background: #f3f4f6;
  padding: 2px 6px;
  border-radius: 4px;
}

pre {
  background: var(--code-bg);
  color: var(--code-text);
  padding: 16px 18px;
  border-radius: var(--radius);
  overflow-x: auto;
  font-size: 14px;
  line-height: 1.6;
  margin: 0 0 20px;
}

pre code {
  background: none;
  padding: 0;
  font-size: inherit;
  color: inherit;
}

.callout {
  border-left: 3px solid #f59e0b;
  background: #fffbeb;
  padding: 12px 16px;
  border-radius: 0 8px 8px 0;
  margin: 0 0 20px;
  font-size: 15px;
}

.lead {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: #f0fdf4;
  border: 1px dashed #6ee7b7;
  border-radius: var(--radius);
  padding: 14px 18px;
  margin: 32px 0 0;
  font-size: 15px;
}

.lead p { margin: 0; }

.lead a { font-weight: 600; white-space: nowrap; }

.cta {
  background: var(--accent-soft);
  border: 1px solid #a7f3d0;
  border-radius: var(--radius);
  padding: 24px;
  margin: 40px 0 0;
}

.cta h3 { margin: 0 0 8px; font-size: 18px; }
.cta p { margin: 0 0 16px; font-size: 15px; color: #065f46; }

.cta a.button {
  display: inline-block;
  background: var(--accent);
  color: #ffffff;
  text-decoration: none;
  padding: 10px 18px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 15px;
}

.cta a.button:hover { background: #065f46; }

.cta .secondary {
  margin-left: 12px;
  font-size: 14px;
  color: var(--accent);
}

.related {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.related h2 { margin-top: 0; font-size: 16px; color: var(--muted); }

.related ul { margin: 0; padding-left: 20px; font-size: 15px; }
.related li { margin-bottom: 6px; }

table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 20px;
  font-size: 15px;
}

th, td {
  border: 1px solid var(--line);
  padding: 8px 12px;
  text-align: left;
  vertical-align: top;
}

th { background: #f9fafb; font-weight: 600; }

footer {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 20px 48px;
  color: var(--muted);
  font-size: 13px;
}

footer a { color: var(--muted); }

@media (max-width: 640px) {
  article { padding: 24px 18px; }
  h1 { font-size: 24px; }
  body { font-size: 16px; }
}