:root {
  color-scheme: light;
  --bg: #f7f8fa;
  --text: #17202a;
  --muted: #5f6b7a;
  --line: #d8dee6;
  --panel: #ffffff;
  --accent: #146c63;
}

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

.page-shell {
  width: min(1040px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 56px;
}

.site-nav {
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}

.site-nav .page-shell {
  padding: 14px 0;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

a {
  color: #2d5f9a;
}

h1,
h2,
h3 {
  line-height: 1.2;
}

table {
  border-collapse: collapse;
  width: 100%;
  background: var(--panel);
}

th,
td {
  border: 1px solid var(--line);
  padding: 8px 10px;
  text-align: left;
}

pre {
  overflow-x: auto;
  padding: 14px;
  border-radius: 8px;
  background: #111827;
  color: #f9fafb;
}

code {
  border-radius: 4px;
}

.mermaid {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
  overflow-x: auto;
}