:root {
  --primary: #1a4d5c;
  --primary-light: #2c6a7d;
  --accent: #f97316;
  --accent-soft: #fff4e6;
  --bg: #ffffff;
  --bg-soft: #f8f9fa;
  --text: #1a1a1a;
  --text-muted: #5c6470;
  --border: #e1e4e8;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 760px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

header.site-header {
  border-bottom: 1px solid var(--border);
  padding: 1.25rem 0;
  background: var(--bg);
}

header.site-header .container {
  padding-top: 0;
  padding-bottom: 0;
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--primary);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.logo span {
  color: var(--accent);
}

nav.breadcrumb {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

nav.breadcrumb a {
  color: var(--text-muted);
  text-decoration: none;
}

nav.breadcrumb a:hover {
  color: var(--primary);
  text-decoration: underline;
}

h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
  color: var(--primary);
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.subtitle {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 2.5rem;
}

h2 {
  font-size: 1.35rem;
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
  color: var(--primary);
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.05rem;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
  color: var(--text);
  font-weight: 600;
}

p, ul, ol {
  margin-bottom: 1rem;
}

ul, ol {
  padding-left: 1.5rem;
}

li {
  margin-bottom: 0.4rem;
}

a {
  color: var(--primary-light);
}

a:hover {
  color: var(--primary);
}

.toc {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 2.5rem;
}

.toc h2 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 0 0 0.75rem 0;
  color: var(--text-muted);
}

.toc ol {
  margin: 0;
  padding-left: 1.25rem;
  font-size: 0.95rem;
}

.toc li {
  margin-bottom: 0.25rem;
}

.toc a {
  text-decoration: none;
}

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

.callout {
  background: var(--accent-soft);
  border-left: 4px solid var(--accent);
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  border-radius: 4px;
}

.callout p {
  margin-bottom: 0.5rem;
}

.callout p:last-child {
  margin-bottom: 0;
}

.docs-list {
  display: grid;
  gap: 1rem;
  margin-top: 2rem;
}

.doc-card {
  display: block;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s, transform 0.15s, box-shadow 0.15s;
}

.doc-card:hover {
  border-color: var(--primary-light);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(26, 77, 92, 0.08);
}

.doc-card h3 {
  margin: 0 0 0.25rem 0;
  color: var(--primary);
}

.doc-card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

footer {
  border-top: 1px solid var(--border);
  margin-top: 4rem;
  padding-top: 1.5rem;
  padding-bottom: 1.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  text-align: center;
}

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

footer .container {
  padding-top: 0;
  padding-bottom: 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.95rem;
}

table th,
table td {
  text-align: left;
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--border);
  vertical-align: top;
}

table th {
  background: var(--bg-soft);
  font-weight: 600;
  color: var(--primary);
}

strong {
  color: var(--text);
}

@media (max-width: 600px) {
  body { font-size: 15px; }
  h1 { font-size: 1.6rem; }
  h2 { font-size: 1.2rem; }
  .container { padding: 1.5rem 1.25rem 3rem; }
}