:root {
  --bg: #f5f7fb;
  --panel: #ffffff;
  --text: #1f2933;
  --muted: #5d6978;
  --line: #d9dee7;
  --accent: #155e75;
  --accent-strong: #0f3f4f;
  --accent-soft: #e5f3f6;
  --code: #f1f4f8;
  --shadow: 0 16px 36px rgba(31, 41, 51, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px 28px;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
  position: sticky;
  top: 0;
  z-index: 2;
}

.brand {
  color: var(--text);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0;
}

.top-nav {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  font-size: 14px;
}

.page {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  max-width: 1240px;
  margin: 0 auto;
}

.sidebar {
  padding: 28px 18px;
  border-right: 1px solid var(--line);
  min-height: calc(100vh - 56px);
}

.sidebar-title {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
  margin: 0 0 10px;
  text-transform: uppercase;
}

.sidebar a {
  display: block;
  padding: 8px 10px;
  border-radius: 6px;
  color: var(--text);
  font-size: 14px;
}

.sidebar a:hover {
  background: var(--accent-soft);
  text-decoration: none;
}

.content {
  background: var(--panel);
  margin: 28px;
  padding: 40px 48px;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  min-width: 0;
}

h1 {
  margin-top: 0;
  line-height: 1.2;
  font-size: 38px;
}

h2 {
  margin-top: 38px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  line-height: 1.25;
}

h3 {
  margin-top: 26px;
}

p, li {
  color: var(--text);
}

.doc-hero {
  background: linear-gradient(135deg, #eef8fa 0%, #ffffff 62%);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 32px;
  margin: 0 0 28px;
}

.doc-hero h2 {
  border: 0;
  margin: 0;
  padding: 0;
  font-size: 30px;
}

.doc-hero p {
  max-width: 760px;
  margin: 14px 0 0;
  color: var(--muted);
}

.eyebrow {
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  margin: 0 0 10px;
  text-transform: uppercase;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.button {
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--accent-strong);
  display: inline-flex;
  font-weight: 700;
  min-height: 40px;
  padding: 8px 14px;
}

.button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #ffffff;
}

.button:hover {
  text-decoration: none;
  border-color: var(--accent);
}

.status-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 0 0 34px;
}

.status-strip div {
  background: #f8fafc;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px 16px;
}

.status-strip strong,
.status-strip span {
  display: block;
}

.status-strip span {
  color: var(--muted);
  font-size: 14px;
  margin-top: 4px;
}

.link-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 18px 0 30px;
}

.link-grid.compact {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.doc-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  display: block;
  padding: 16px 18px;
  background: #ffffff;
}

.doc-card:hover {
  border-color: var(--accent);
  box-shadow: 0 10px 22px rgba(21, 94, 117, 0.1);
  text-decoration: none;
}

.doc-card span {
  color: var(--accent-strong);
  display: block;
  font-weight: 700;
}

.doc-card small {
  color: var(--muted);
  display: block;
  margin-top: 6px;
}

blockquote {
  border-left: 4px solid var(--accent);
  margin: 18px 0;
  padding: 8px 16px;
  background: var(--accent-soft);
}

code {
  background: var(--code);
  padding: 2px 5px;
  border-radius: 4px;
}

pre {
  background: var(--code);
  padding: 16px;
  border-radius: 6px;
  overflow: auto;
}

pre code {
  padding: 0;
}

table {
  border-collapse: collapse;
  width: 100%;
  margin: 18px 0;
}

th, td {
  border: 1px solid var(--line);
  padding: 9px 11px;
  text-align: left;
  vertical-align: top;
}

th {
  background: #f3f6fa;
}

.site-footer {
  max-width: 1180px;
  margin: 0 auto;
  padding: 18px 28px 36px;
  color: var(--muted);
}

@media (max-width: 820px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .page {
    display: block;
  }

  .sidebar {
    min-height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .content {
    margin: 16px;
    padding: 24px 20px;
  }

  .doc-hero {
    padding: 24px 20px;
  }

  .status-strip,
  .link-grid,
  .link-grid.compact {
    grid-template-columns: 1fr;
  }
}