:root {
  --bg: #ffffff;
  --bg-soft: #f7f8fa;
  --border: #e4e6eb;
  --text: #111111;
  --text-soft: #555;
  --link: #1f6feb;
  --code-bg: #f4f4f6;
  --accent: #6366f1;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--text); font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Apple SD Gothic Neo', 'Malgun Gothic', sans-serif; line-height: 1.6; }
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }
code { background: var(--code-bg); padding: 0.1em 0.4em; border-radius: 4px; font-size: 0.9em; font-family: 'SF Mono', Consolas, monospace; }
pre code { background: transparent; padding: 0; }
pre { background: var(--code-bg); padding: 16px; border-radius: 8px; overflow-x: auto; line-height: 1.5; }
.topbar { position: sticky; top: 0; background: var(--bg); border-bottom: 1px solid var(--border); z-index: 10; }
.topbar-inner { display: flex; align-items: center; gap: 16px; max-width: 1280px; margin: 0 auto; padding: 14px 24px; }
.brand { font-weight: 700; font-size: 18px; color: var(--text); }
.version-badge { background: var(--bg-soft); border: 1px solid var(--border); border-radius: 999px; padding: 2px 10px; font-size: 12px; color: var(--text-soft); }
.topnav { display: flex; gap: 18px; margin-left: 32px; flex: 1; }
.topnav a { color: var(--text-soft); font-weight: 500; }
.topnav a:hover { color: var(--text); }
.root-link { color: var(--text-soft); font-size: 13px; padding: 4px 10px; border: 1px solid var(--border); border-radius: 6px; }
.layout { display: grid; grid-template-columns: 240px 1fr; max-width: 1280px; margin: 0 auto; min-height: calc(100vh - 110px); }
.sidebar { padding: 24px 16px 24px 24px; border-right: 1px solid var(--border); }
.sidebar-section { margin-bottom: 24px; }
.sidebar-section h4 { font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-soft); margin: 0 0 8px; }
.sidebar-section ul { list-style: none; margin: 0; padding: 0; }
.sidebar-section li { margin: 4px 0; }
.sidebar-section a { color: var(--text); font-size: 14px; display: block; padding: 4px 8px; border-radius: 4px; }
.sidebar-section a:hover { background: var(--bg-soft); text-decoration: none; }
.content { padding: 32px 40px; max-width: 880px; }
.content h1 { font-size: 28px; margin-top: 0; }
.content h2 { margin-top: 32px; padding-bottom: 6px; border-bottom: 1px solid var(--border); font-size: 22px; }
.content h3 { margin-top: 24px; font-size: 17px; }
.content blockquote { border-left: 4px solid var(--accent); margin: 16px 0; padding: 8px 16px; background: var(--bg-soft); color: var(--text-soft); border-radius: 0 6px 6px 0; }
.content table { border-collapse: collapse; margin: 16px 0; }
.content th, .content td { border: 1px solid var(--border); padding: 8px 12px; text-align: left; font-size: 14px; }
.content th { background: var(--bg-soft); }
.footbar { border-top: 1px solid var(--border); padding: 16px 24px; text-align: center; color: var(--text-soft); font-size: 13px; }

/* Root version picker page */
.picker-wrap { max-width: 720px; margin: 80px auto; padding: 0 24px; text-align: center; }
.picker-wrap h1 { font-size: 32px; }
.picker-wrap p { color: var(--text-soft); margin-bottom: 32px; }
.picker-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.picker-list a { display: block; padding: 16px 20px; border: 1px solid var(--border); border-radius: 8px; text-align: left; transition: border-color 0.15s; }
.picker-list a:hover { border-color: var(--accent); text-decoration: none; }
.picker-list .ver { font-weight: 600; font-size: 16px; color: var(--text); }
.picker-list .latest-tag { background: var(--accent); color: white; font-size: 11px; padding: 2px 8px; border-radius: 999px; margin-left: 8px; vertical-align: middle; }