/* ============================================================
   유지보수 가이드 페이지 — 사이드바 + README 렌더 뷰어
   ============================================================ */

:root {
  --bg: #ffffff;
  --bg-soft: #f6f7f9;
  --bg-sidebar: #fafbfc;
  --text: #1f2328;
  --text-muted: #57606a;
  --border: #d0d7de;
  --border-soft: #eaeef2;
  --accent: #0969da;
  --accent-soft: #dbeafe;
  --code-bg: #f3f4f6;
  --quote-bg: #f6f8fa;
  --table-stripe: #f9fafb;
  --shadow: 0 1px 3px rgba(0,0,0,.06);

  --font-sans: 'Pretendard', -apple-system, 'Segoe UI', 'Apple SD Gothic Neo', 'Malgun Gothic', sans-serif;
  --font-mono: ui-monospace, 'SF Mono', Consolas, monospace;

  --sidebar-w: 280px;
  --content-max: 860px;
}

[data-theme="dark"] {
  --bg: #0d1117;
  --bg-soft: #161b22;
  --bg-sidebar: #010409;
  --text: #e6edf3;
  --text-muted: #8d96a0;
  --border: #30363d;
  --border-soft: #21262d;
  --accent: #58a6ff;
  --accent-soft: #1f3a5f;
  --code-bg: #161b22;
  --quote-bg: #161b22;
  --table-stripe: #161b22;
  --shadow: 0 1px 3px rgba(0,0,0,.4);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  word-break: keep-all;
  overflow-wrap: anywhere;
}

#home-link {
  position: fixed;
  top: 12px;
  right: 16px;
  z-index: 60;
  padding: 7px 12px;
  background: var(--bg);
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 12.5px;
  font-weight: 600;
  text-decoration: none;
  box-shadow: var(--shadow);
}
#home-link:hover {
  background: var(--bg-soft);
  color: var(--accent);
}

#sidebar {
  position: fixed;
  top: 0; left: 0;
  width: var(--sidebar-w);
  height: 100vh;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  z-index: 50;
}
.sidebar-header {
  padding: 16px;
  border-bottom: 1px solid var(--border-soft);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.hb-brand {
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .5px;
  color: var(--text-muted);
  text-transform: uppercase;
}
.sidebar-header h2 {
  margin: 0;
  font-size: 16px;
  font-weight: 800;
}
#toc-search {
  margin-top: 4px;
  width: 100%;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text);
  font-size: 13px;
  font-family: inherit;
}
#toc-search:focus {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
}
#toc {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 8px 0;
}
#toc ul { list-style: none; margin: 0; padding: 0; }
#toc li a {
  display: block;
  padding: 5px 16px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 13px;
  border-left: 2px solid transparent;
  transition: background .12s, color .12s, border-color .12s;
}
#toc li a:hover {
  background: var(--bg-soft);
  color: var(--text);
}
#toc li a.active {
  color: var(--accent);
  border-left-color: var(--accent);
  background: var(--accent-soft);
  font-weight: 600;
}
#toc li.toc-h1 > a { font-weight: 700; color: var(--text); padding-top: 10px; }
#toc li.toc-h2 > a { font-weight: 600; }
#toc li.toc-h3 > a { padding-left: 30px; font-size: 12.5px; }

.sidebar-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--border-soft);
}
.sidebar-footer a {
  font-size: 12px;
  color: var(--accent);
  text-decoration: none;
}

#toc-toggle {
  display: none;
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 60;
  padding: 8px 14px;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
  box-shadow: var(--shadow);
}

#content-wrapper {
  margin-left: var(--sidebar-w);
  padding: 48px 56px 80px;
  min-height: 100vh;
}
#content {
  max-width: var(--content-max);
  margin: 0 auto;
}

.loading, .error {
  padding: 24px;
  background: var(--bg-soft);
  border-radius: 8px;
  color: var(--text-muted);
}
.error {
  color: #b91c1c;
  background: #fef2f2;
  border: 1px solid #fecaca;
}

#content h1 {
  font-size: 30px;
  font-weight: 800;
  margin: 0 0 24px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--border);
  line-height: 1.3;
  scroll-margin-top: 24px;
}
#content h2 {
  font-size: 22px;
  font-weight: 700;
  margin: 48px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-soft);
  scroll-margin-top: 24px;
}
#content h3 {
  font-size: 18px;
  font-weight: 700;
  margin: 32px 0 12px;
  scroll-margin-top: 24px;
}
#content h4 {
  font-size: 16px;
  font-weight: 700;
  margin: 24px 0 8px;
}
#content p { margin: 0 0 14px; }
#content a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
#content a:hover { border-bottom-color: var(--accent); }
#content strong { font-weight: 700; color: var(--text); }
#content ul, #content ol { margin: 0 0 14px; padding-left: 24px; }
#content li { margin: 4px 0; }
#content blockquote {
  margin: 16px 0;
  padding: 12px 16px;
  background: var(--quote-bg);
  border-left: 4px solid var(--border);
  border-radius: 0 6px 6px 0;
}
#content code {
  padding: 2px 6px;
  background: var(--code-bg);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.88em;
}
#content pre {
  margin: 16px 0;
  padding: 14px 18px;
  background: var(--code-bg);
  border: 1px solid var(--border-soft);
  border-radius: 8px;
  overflow-x: auto;
  font-size: 13px;
}
#content pre code { padding: 0; background: transparent; }
#content table {
  width: 100%;
  margin: 16px 0;
  border-collapse: collapse;
  font-size: 14.5px;
}
#content th, #content td {
  padding: 8px 12px;
  border: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}
#content th { background: var(--bg-soft); font-weight: 700; }
#content tr:nth-child(even) td { background: var(--table-stripe); }
#content hr { margin: 32px 0; border: 0; border-top: 1px solid var(--border-soft); }

footer {
  position: fixed;
  bottom: 16px;
  right: 16px;
  display: flex;
  gap: 6px;
  z-index: 40;
}
footer button {
  padding: 8px 12px;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
  font-family: inherit;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow);
}
footer button:hover { background: var(--bg-soft); }
[data-theme="dark"] #theme-toggle { background: var(--bg-soft); border-color: var(--accent); }

@media (max-width: 900px) {
  #toc-toggle { display: block; }
  #sidebar {
    transform: translateX(-100%);
    transition: transform .25s;
    width: 85%;
    max-width: 320px;
  }
  body.sidebar-open #sidebar {
    transform: translateX(0);
    box-shadow: 4px 0 20px rgba(0,0,0,.2);
  }
  #content-wrapper { margin-left: 0; padding: 64px 20px 80px; }
}

@media print {
  #sidebar, #toc-toggle, footer, #home-link { display: none; }
  #content-wrapper { margin: 0; padding: 0; }
}