:root {
  color-scheme: light;
  --bg: #f6f8fb;
  --panel: #ffffff;
  --ink: #18202a;
  --muted: #5b6b7d;
  --line: #dde4ee;
  --brand: #0f5bd8;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
}

.layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  min-height: 100vh;
}

.sidebar {
  border-right: 1px solid var(--line);
  background: var(--panel);
  padding: 20px 16px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: auto;
}

.sidebar h1 {
  margin: 0;
  font-size: 20px;
}

.subtitle {
  margin: 8px 0 18px;
  color: var(--muted);
  font-size: 13px;
}

#doc-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.doc-link {
  display: block;
  text-decoration: none;
  color: var(--ink);
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 9px 10px;
  font-size: 14px;
}

.doc-link:hover {
  background: #f1f5fb;
  border-color: var(--line);
}

.doc-link.active {
  background: #eaf2ff;
  border-color: #cfe0ff;
  color: var(--brand);
  font-weight: 600;
}

.content {
  padding: 0;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 2;
  border-bottom: 1px solid var(--line);
  background: rgba(246, 248, 251, 0.96);
  backdrop-filter: blur(6px);
  padding: 14px 24px;
}

#doc-title {
  font-size: 15px;
  font-weight: 600;
}

#doc-body {
  max-width: 980px;
  margin: 0 auto;
  padding: 26px 24px 60px;
  line-height: 1.56;
}

#doc-body h1,
#doc-body h2,
#doc-body h3 {
  line-height: 1.25;
}

#doc-body table {
  border-collapse: collapse;
  width: 100%;
  margin: 16px 0;
  background: #fff;
  table-layout: fixed;
}

#doc-body table th,
#doc-body table td {
  border: 1px solid var(--line);
  padding: 8px 10px;
  text-align: left;
  vertical-align: top;
  font-size: 14px;
  word-break: break-word;
}

#doc-body code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: #eef3fb;
  padding: 1px 5px;
  border-radius: 5px;
}

#doc-body pre {
  background: #f4f7fc;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  overflow-x: auto;
}

#doc-body pre code {
  background: transparent;
  padding: 0;
}

#doc-body .mermaid {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
  overflow-x: auto;
}

#doc-body .mermaid-wrap {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  margin: 14px 0;
}

#doc-body .mermaid-controls {
  display: flex;
  gap: 6px;
  align-items: center;
  border-bottom: 1px solid var(--line);
  padding: 8px;
  background: #f7faff;
}

#doc-body .mermaid-btn {
  border: 1px solid #c8d7f0;
  background: #fff;
  border-radius: 6px;
  min-width: 34px;
  height: 28px;
  cursor: pointer;
  font-weight: 600;
}

#doc-body .mermaid-btn:hover {
  background: #eef4ff;
}

#doc-body .mermaid-viewport {
  position: relative;
  overflow: hidden;
  width: 100%;
  min-height: 260px;
  max-height: 70vh;
}

#doc-body .mermaid-viewport .mermaid {
  border: 0;
  margin: 0;
  padding: 10px;
  width: max-content;
  min-width: 100%;
}

#doc-body ul,
#doc-body ol {
  padding-left: 22px;
}

#doc-body blockquote {
  margin: 12px 0;
  padding: 10px 12px;
  border-left: 3px solid #cfe0ff;
  background: #f7faff;
}

#doc-body .mermaid-failed {
  border-color: #e59a9a;
  background: #fff5f5;
}

@media (max-width: 980px) {
  .layout {
    grid-template-columns: 1fr;
  }
  .sidebar {
    position: relative;
    height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
}