/* Default = light. data-theme="dark" forces dark. No data-theme = follow OS. */
:root {
  --bg: #ffffff;
  --bg-subtle: #f6f8fa;
  --fg: #1f2328;
  --fg-muted: #656d76;
  --border: #d0d7de;
  --border-subtle: #eaeef2;
  --accent: #0969da;
  --accent-subtle: #ddf4ff;
  --sidebar-bg: #f6f8fa;
  --code-bg: #f6f8fa;
  --blockquote-bg: #f6f8fa;
  --blockquote-border: #d0d7de;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --bg-subtle: #161b22;
    --fg: #e6edf3;
    --fg-muted: #8d96a0;
    --border: #30363d;
    --border-subtle: #21262d;
    --accent: #2f81f7;
    --accent-subtle: #1f2a42;
    --sidebar-bg: #0d1117;
    --code-bg: #161b22;
    --blockquote-bg: #161b22;
    --blockquote-border: #30363d;
  }
}

html[data-theme="dark"] {
  --bg: #0d1117;
  --bg-subtle: #161b22;
  --fg: #e6edf3;
  --fg-muted: #8d96a0;
  --border: #30363d;
  --border-subtle: #21262d;
  --accent: #2f81f7;
  --accent-subtle: #1f2a42;
  --sidebar-bg: #0d1117;
  --code-bg: #161b22;
  --blockquote-bg: #161b22;
  --blockquote-border: #30363d;
}

html[data-theme="light"] {
  --bg: #ffffff;
  --bg-subtle: #f6f8fa;
  --fg: #1f2328;
  --fg-muted: #656d76;
  --border: #d0d7de;
  --border-subtle: #eaeef2;
  --accent: #0969da;
  --accent-subtle: #ddf4ff;
  --sidebar-bg: #f6f8fa;
  --code-bg: #f6f8fa;
  --blockquote-bg: #f6f8fa;
  --blockquote-border: #d0d7de;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

/* Sidebar */
#sidebar {
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border);
  padding: 24px 20px 40px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  font-size: 14px;
}

.sidebar-header {
  padding-bottom: 16px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--border-subtle);
}

.agent-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}

.agent-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--fg);
}

.site-label {
  font-size: 12px;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 2px;
}

#theme-toggle {
  background: transparent;
  color: var(--fg-muted);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  width: 32px;
  height: 32px;
  cursor: pointer;
  font-size: 14px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.1s, color 0.1s, border-color 0.1s;
}

#theme-toggle:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-subtle);
}

/* Show sun in dark mode (to switch TO light); show moon in light mode (to switch TO dark) */
.theme-icon-light { display: none; }
.theme-icon-dark { display: inline; }
html[data-theme="dark"] .theme-icon-light { display: inline; }
html[data-theme="dark"] .theme-icon-dark { display: none; }
@media (prefers-color-scheme: dark) {
  html:not([data-theme]) .theme-icon-light { display: inline; }
  html:not([data-theme]) .theme-icon-dark { display: none; }
}

.toc-title {
  font-size: 11px !important;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--fg-muted) !important;
  margin: 0 0 8px 0 !important;
  border: none !important;
  padding: 0 !important;
  font-weight: 600;
}

.toc ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.toc a {
  display: block;
  padding: 4px 8px;
  color: var(--fg);
  text-decoration: none;
  border-radius: 4px;
  border-left: 2px solid transparent;
  margin-left: -2px;
  transition: background 0.08s, color 0.08s;
}

.toc a:hover {
  background: var(--accent-subtle);
  color: var(--accent);
}

.toc a.active {
  background: var(--accent-subtle);
  color: var(--accent);
  border-left-color: var(--accent);
  font-weight: 600;
}

.toc-row {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-top: 6px;
}

.toc-expand {
  background: transparent;
  border: none;
  color: var(--fg-muted);
  cursor: pointer;
  padding: 2px 4px;
  font-size: 11px;
  line-height: 1;
  flex-shrink: 0;
  width: 20px;
  text-align: center;
  border-radius: 3px;
  transition: background 0.08s, color 0.08s;
}

.toc-expand:hover {
  background: var(--accent-subtle);
  color: var(--accent);
}

.toc-row > a {
  flex: 1;
  margin-left: 0;
}

.toc-l2 > .toc-row > a { font-weight: 600; }

.toc-sublist {
  margin: 2px 0 6px 20px !important;
  padding-left: 0 !important;
}

.toc-subsublist {
  margin: 2px 0 2px 16px !important;
  padding-left: 0 !important;
}

.toc-l3 > a { font-weight: 400; color: var(--fg-muted); padding-left: 8px; }
.toc-l3 > a:hover, .toc-l3 > a.active { color: var(--accent); }
.toc-l4 > a { padding-left: 20px; font-size: 13px; color: var(--fg-muted); }

/* Main content */
#content {
  padding: 48px 72px 96px;
  max-width: 860px;
  margin: 0;
  overflow-wrap: break-word;
}

#content h1 {
  font-size: 32px;
  margin-top: 0;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
  font-weight: 700;
}

#content h2 {
  font-size: 24px;
  margin-top: 48px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border-subtle);
  font-weight: 700;
}

#content h3 {
  font-size: 19px;
  margin-top: 36px;
  font-weight: 600;
}

#content h4 {
  font-size: 16px;
  margin-top: 28px;
  font-weight: 600;
  color: var(--fg-muted);
}

#content p { margin: 0.8em 0; }

#content a { color: var(--accent); text-decoration: none; }
#content a:hover { text-decoration: underline; }

#content ul, #content ol { padding-left: 28px; margin: 0.6em 0; }
#content li { margin: 0.35em 0; }

#content blockquote {
  margin: 1em 0;
  padding: 10px 18px;
  background: var(--blockquote-bg);
  border-left: 3px solid var(--blockquote-border);
  color: var(--fg-muted);
  border-radius: 0 4px 4px 0;
}

#content code {
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.92em;
  font-family: "SF Mono", Menlo, Monaco, monospace;
}

#content pre {
  background: var(--code-bg);
  padding: 14px;
  border-radius: 6px;
  overflow-x: auto;
  border: 1px solid var(--border-subtle);
}

#content table {
  border-collapse: collapse;
  width: 100%;
  margin: 1em 0;
  font-size: 14px;
}

#content th, #content td {
  border: 1px solid var(--border-subtle);
  padding: 8px 12px;
  text-align: left;
  vertical-align: top;
}

#content th {
  background: var(--bg-subtle);
  font-weight: 600;
}

#content hr {
  border: none;
  border-top: 1px solid var(--border-subtle);
  margin: 2.5em 0;
}

/* Mobile toggle button */
#toc-toggle {
  display: none;
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 10;
  background: var(--bg);
  color: var(--fg);
  border: 1px solid var(--border);
  padding: 8px 14px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

@media (max-width: 1023px) {
  body { grid-template-columns: 1fr; }
  #sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 300px;
    max-width: 85vw;
    height: 100vh;
    transform: translateX(-100%);
    transition: transform 0.2s;
    z-index: 20;
    box-shadow: 2px 0 12px rgba(0,0,0,0.15);
  }
  #sidebar.open { transform: translateX(0); }
  #toc-toggle { display: block; }
  #content { padding: 24px 20px 64px; }
  #content h1 { font-size: 26px; }
  #content h2 { font-size: 20px; margin-top: 32px; }
}