/* RTD-inspired styling — self-contained, no build step */

:root {
  --rtd-bg: #fcfcfc;
  --rtd-fg: #404040;
  --rtd-muted: #6c6c6c;
  --rtd-sidebar-bg: #343131;
  --rtd-sidebar-fg: #d9d9d9;
  --rtd-sidebar-hl: #2980b9;
  --rtd-sidebar-active: #1f6391;
  --rtd-link: #2980b9;
  --rtd-link-hover: #1f6391;
  --rtd-border: #e1e4e5;
  --rtd-code-bg: #f8f8f8;
  --rtd-code-border: #e1e4e5;
  --rtd-callout-note: #e7f2fa;
  --rtd-callout-note-border: #6ab0de;
  --rtd-callout-warn: #ffedcc;
  --rtd-callout-warn-border: #f0b37e;
  --rtd-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --rtd-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--rtd-bg);
  color: var(--rtd-fg);
  font-family: var(--rtd-sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--rtd-link); text-decoration: none; }
a:hover { color: var(--rtd-link-hover); text-decoration: underline; }

.layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  background: var(--rtd-sidebar-bg);
  color: var(--rtd-sidebar-fg);
  padding: 0;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.sidebar-header {
  background: #2980b9;
  padding: 1rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.sidebar-header h1 {
  font-size: 1.05rem;
  margin: 0;
  color: #fff;
  font-weight: 600;
  letter-spacing: 0.01em;
}
.sidebar-header p {
  margin: 0;
  font-size: 0.78rem;
  color: rgba(255,255,255,0.8);
}

.sidebar-search {
  padding: 0.75rem 1rem;
  background: #2472a4;
}
.sidebar-search input {
  width: 100%;
  padding: 0.4rem 0.6rem;
  border: 0;
  border-radius: 3px;
  font-family: var(--rtd-sans);
  font-size: 0.85rem;
  background: #fff;
  color: #333;
}

.sidebar-nav { padding: 0.75rem 0; }
.sidebar-nav > .section {
  padding: 0.4rem 1.25rem 0.2rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.55);
  font-weight: 700;
}
.sidebar-nav ul {
  list-style: none;
  margin: 0 0 0.75rem;
  padding: 0;
}
.sidebar-nav ul ul { margin-left: 0.5rem; }
.sidebar-nav a {
  display: block;
  padding: 0.35rem 1.25rem;
  color: var(--rtd-sidebar-fg);
  font-size: 0.9rem;
  border-left: 3px solid transparent;
}
.sidebar-nav a:hover {
  background: rgba(255,255,255,0.04);
  color: #fff;
  text-decoration: none;
}
.sidebar-nav a.active {
  background: var(--rtd-sidebar-active);
  color: #fff;
  border-left-color: #6ab0de;
}
.sidebar-nav ul ul a {
  padding-left: 2.25rem;
  font-size: 0.85rem;
  color: rgba(217,217,217,0.85);
}

/* Content */
main {
  padding: 0;
  min-width: 0;
}
.content {
  max-width: 900px;
  padding: 2rem 3rem 4rem;
}

.breadcrumb {
  font-size: 0.85rem;
  color: var(--rtd-muted);
  padding: 0.5rem 0 1.25rem;
  border-bottom: 1px solid var(--rtd-border);
  margin-bottom: 1.75rem;
}
.breadcrumb a { color: var(--rtd-muted); }

h1, h2, h3, h4 { color: #2c3e50; font-weight: 600; line-height: 1.3; }
h1 { font-size: 2.1rem; margin: 0 0 0.5rem; }
h2 { font-size: 1.55rem; margin: 2.2rem 0 0.75rem; padding-bottom: 0.4rem; border-bottom: 1px solid var(--rtd-border); }
h3 { font-size: 1.2rem; margin: 1.75rem 0 0.5rem; }
h4 { font-size: 1.05rem; margin: 1.4rem 0 0.4rem; }

p, ul, ol { margin: 0 0 1rem; }
li { margin-bottom: 0.25rem; }

code {
  font-family: var(--rtd-mono);
  background: var(--rtd-code-bg);
  border: 1px solid var(--rtd-code-border);
  border-radius: 3px;
  padding: 0.05em 0.4em;
  font-size: 0.85em;
  color: #c7254e;
  word-break: break-word;
}
pre {
  background: var(--rtd-code-bg);
  border: 1px solid var(--rtd-code-border);
  border-radius: 4px;
  padding: 0.9rem 1rem;
  overflow-x: auto;
  font-size: 0.85em;
  line-height: 1.5;
  margin: 0 0 1rem;
}
pre code {
  background: transparent;
  border: 0;
  padding: 0;
  color: #2c3e50;
  font-size: 1em;
}

table {
  border-collapse: collapse;
  width: 100%;
  margin: 0 0 1rem;
  font-size: 0.92rem;
}
th, td {
  text-align: left;
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--rtd-border);
  vertical-align: top;
}
th { background: #f3f6f6; font-weight: 600; }
tr:nth-child(even) td { background: #fbfbfb; }

blockquote {
  margin: 1rem 0;
  padding: 0.05rem 1rem;
  border-left: 4px solid var(--rtd-border);
  color: var(--rtd-muted);
  background: #fafafa;
}

.admonition {
  border-radius: 4px;
  padding: 0.6rem 1rem 0.8rem;
  margin: 1.25rem 0;
  border-left: 4px solid;
}
.admonition .title {
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.03em;
  margin-bottom: 0.25rem;
}
.admonition.note {
  background: var(--rtd-callout-note);
  border-color: var(--rtd-callout-note-border);
}
.admonition.warning {
  background: var(--rtd-callout-warn);
  border-color: var(--rtd-callout-warn-border);
}

figure { margin: 1.5rem 0; text-align: center; }
figure img, figure object, figure svg, figure embed {
  max-width: 100%;
  height: auto;
  border: 1px solid var(--rtd-border);
  border-radius: 4px;
  background: #fff;
}
figcaption { font-size: 0.85rem; color: var(--rtd-muted); margin-top: 0.4rem; }

.footer {
  margin-top: 3rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--rtd-border);
  font-size: 0.85rem;
  color: var(--rtd-muted);
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.pager {
  display: flex;
  justify-content: space-between;
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--rtd-border);
}
.pager a {
  display: inline-block;
  padding: 0.5rem 1rem;
  border: 1px solid var(--rtd-border);
  border-radius: 4px;
  background: #fff;
}
.pager a:hover { background: #f3f6f6; text-decoration: none; }

.kv {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 0.3rem 1rem;
  font-size: 0.92rem;
  margin: 1rem 0;
}
.kv .k { color: var(--rtd-muted); font-family: var(--rtd-mono); font-size: 0.85rem; }
.kv .v { color: var(--rtd-fg); }

.badges { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-bottom: 1.25rem; }
.badges img { height: 20px; }

.menu-toggle {
  display: none;
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 30;
  background: #2980b9;
  color: #fff;
  border: 0;
  border-radius: 4px;
  padding: 0.45rem 0.75rem;
  font-size: 0.9rem;
  cursor: pointer;
}

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed;
    top: 0; left: 0;
    width: 280px;
    transform: translateX(-100%);
    transition: transform 0.2s;
    z-index: 20;
  }
  .sidebar.open { transform: translateX(0); }
  .menu-toggle { display: block; }
  .content { padding: 3.5rem 1.25rem 2.5rem; }
}