/* makystats docs — collapsible sidebar + Models fold */
:root {
  --bg: #0f1419;
  --surface: #171c26;
  --sidebar-bg: #12161e;
  --text: #e7ecf3;
  --muted: #8b9bb4;
  --accent: #3d9cf0;
  --accent-soft: rgba(61, 156, 240, 0.14);
  --border: #2a3548;
  --code-bg: #0b1017;
  --sidebar-w: 248px;
  --top-h: 52px;
}
* { box-sizing: border-box; }
html, body {
  margin: 0;
  height: 100%;
}
body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 15.5px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.topbar {
  flex-shrink: 0;
  height: var(--top-h);
  width: 100%;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0 1rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  z-index: 30;
}
.menu-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: transparent;
  color: var(--text);
  cursor: pointer;
  flex-shrink: 0;
  padding: 0;
}
.menu-btn:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
}
.menu-btn svg { width: 18px; height: 18px; display: block; }
.topbar .brand {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
  margin-right: 0.25rem;
}
.topbar .brand:hover { color: #fff; text-decoration: none; }
.topbar .ext {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text);
  padding: 0.28rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 6px;
}
.topbar .ext:hover {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
  background: var(--accent-soft);
}
.topbar .lang {
  margin-left: auto;
  font-size: 0.85rem;
  color: var(--muted);
  white-space: nowrap;
}
.topbar .lang a { color: var(--muted); }
.topbar .lang a:hover { color: var(--accent); }

.body-row {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: row;
  overflow: hidden;
  position: relative;
}

.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  height: 100%;
  overflow-y: auto;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border);
  padding: 0.75rem 0.55rem 1.5rem;
  display: flex;
  flex-direction: column;
  transition: width 0.2s ease, margin 0.2s ease, transform 0.2s ease, opacity 0.2s ease;
}
.sidebar a.nav-item {
  display: block;
  padding: 0.42rem 0.75rem;
  border-radius: 8px;
  color: var(--muted);
  font-size: 0.92rem;
  margin: 0.06rem 0.15rem;
  border-left: 3px solid transparent;
}
.sidebar a.nav-item:hover {
  background: rgba(255,255,255,0.04);
  color: var(--text);
  text-decoration: none;
}
.sidebar a.nav-item.active {
  background: var(--accent-soft);
  color: #fff;
  font-weight: 600;
  border-left-color: var(--accent);
}

/* Models group: toggle ALWAYS visible; only items fold */
.nav-group {
  margin: 0.35rem 0 0.45rem;
  flex-shrink: 0;
}
.nav-group-toggle {
  width: calc(100% - 0.3rem);
  margin: 0.06rem 0.15rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.42rem 0.75rem;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--text);
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  font-family: inherit;
}
.nav-group-toggle:hover {
  background: rgba(255,255,255,0.04);
}
.nav-group-toggle .chev {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  opacity: 0.75;
  transition: transform 0.15s ease;
}
/* collapsed: rotate chevron, hide ONLY the items list — never the toggle */
.nav-group.is-collapsed .chev {
  transform: rotate(-90deg);
}
.nav-group.is-collapsed .nav-group-items {
  display: none;
}
.nav-group-items {
  display: block;
  padding: 0.05rem 0 0.2rem 0;
  margin: 0 0.1rem 0 0.35rem;
  border-left: 2px solid var(--border);
}
.nav-group-items a.nav-item {
  font-size: 0.9rem;
  padding: 0.38rem 0.65rem 0.38rem 0.85rem;
  margin: 0.04rem 0.1rem 0.04rem 0;
}

body.nav-collapsed .sidebar {
  width: 0;
  margin: 0;
  padding: 0;
  border-right: none;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
}

.sidebar-backdrop {
  display: none;
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.45);
  z-index: 15;
  border: none;
  cursor: pointer;
  padding: 0;
}

.scroll {
  flex: 1;
  min-width: 0;
  height: 100%;
  overflow-y: auto;
  overflow-x: hidden;
}
.wrap {
  max-width: 860px;
  margin: 0 auto;
  padding: 1.5rem 1.75rem 3rem;
}

.hero { text-align: center; padding: 1.25rem 0 0.5rem; }
.hero img { display: block; margin: 0 auto 1rem; }
.hero h1 { margin: 0.25rem 0; font-size: 2rem; }
.lead { color: var(--muted); max-width: 36rem; margin: 0.75rem auto 1rem; }
.badges { display: flex; flex-wrap: wrap; gap: 0.4rem; justify-content: center; }
.badge {
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.2rem 0.7rem;
  font-size: 0.8rem;
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
  margin: 1rem 0 1.5rem;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem 1.1rem;
}
.card h3 { margin: 0 0 0.4rem; font-size: 1.05rem; }
.card p { margin: 0; color: var(--muted); font-size: 0.92rem; }
h1 { font-size: 1.7rem; margin-top: 0.5rem; }
h2 {
  font-size: 1.2rem;
  margin-top: 1.75rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.35rem;
}
h3 { font-size: 1.05rem; }
pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.9rem 1rem;
  overflow-x: auto;
  font-size: 0.88rem;
  line-height: 1.45;
}
code {
  font-family: ui-monospace, "Cascadia Code", "Source Code Pro", Menlo, monospace;
  font-size: 0.9em;
}
p code, li code, td code {
  background: var(--code-bg);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  border: 1px solid var(--border);
}
table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.75rem 0 1rem;
  font-size: 0.92rem;
}
th, td {
  border: 1px solid var(--border);
  padding: 0.45rem 0.65rem;
  text-align: left;
  vertical-align: top;
}
th { background: var(--surface); }
ul { padding-left: 1.25rem; }
li { margin: 0.3rem 0; }
.muted { color: var(--muted); font-size: 0.9rem; }
.note {
  background: var(--accent-soft);
  border-left: 3px solid var(--accent);
  padding: 0.75rem 1rem;
  border-radius: 0 8px 8px 0;
  margin: 1rem 0;
  font-size: 0.92rem;
}
footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.85rem;
}

@media (max-width: 768px) {
  .sidebar {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    width: min(var(--sidebar-w), 85vw);
    z-index: 20;
    transform: translateX(-105%);
    opacity: 1;
    pointer-events: auto;
    box-shadow: 4px 0 24px rgba(0,0,0,0.35);
  }
  body:not(.nav-collapsed) .sidebar {
    transform: translateX(0);
  }
  body:not(.nav-collapsed) .sidebar-backdrop {
    display: block;
  }
  body.nav-collapsed .sidebar {
    width: min(var(--sidebar-w), 85vw);
    margin: 0;
    padding: 0.75rem 0.55rem 1.5rem;
    border-right: 1px solid var(--border);
    overflow-y: auto;
    opacity: 1;
    pointer-events: auto;
    transform: translateX(-105%);
  }
  .scroll { height: 100%; }
  .hero h1 { font-size: 1.45rem; }
  .wrap { padding: 1.1rem 1rem 2.5rem; }
  .topbar .ext { padding: 0.28rem 0.55rem; }
}