:root {
  --bg: #0b0d0f;
  --panel: #111417;
  --line: #2b3035;
  --text: #e8ecef;
  --muted: #9aa3aa;
  --card: #15191d;
  --accent: #7ec8c4;
  --accent-dim: #3d6f6c;
  --nav: 280px;
  --toc: 220px;
  --danger: #c97b7b;
}

* { box-sizing: border-box }
html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  min-height: 100%;
}
body { display: flex; min-height: 100vh }

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

.nav {
  width: var(--nav);
  flex: 0 0 var(--nav);
  background: var(--panel);
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: hidden;
}
.brand {
  padding: 18px 16px 12px;
  border-bottom: 1px solid var(--line);
}
.brand h1 {
  margin: 0;
  font-size: 16px;
  letter-spacing: 0.4px;
}
.brand p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 12px;
}
#packWrap {
  margin-top: 12px;
}
.pack-label {
  display: block;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  margin-bottom: 4px;
}
#packSelect {
  width: 100%;
  background: #1a1f23;
  border: 1px solid var(--line);
  color: var(--text);
  padding: 8px 10px;
  border-radius: 5px;
  font: inherit;
  font-size: 13px;
}
#packSelect:hover, #packSelect:focus,
#langSelect:hover, #langSelect:focus {
  outline: 1px solid var(--accent-dim);
  border-color: var(--accent-dim);
}
#langWrap {
  margin-top: 10px;
}
#langSelect {
  width: 100%;
  background: #1a1f23;
  border: 1px solid var(--line);
  color: var(--text);
  padding: 8px 10px;
  border-radius: 5px;
  font: inherit;
  font-size: 13px;
}
.search {
  padding: 12px 12px 8px;
}
.search input {
  width: 100%;
  background: #1a1f23;
  border: 1px solid var(--line);
  color: var(--text);
  padding: 8px 10px;
  border-radius: 5px;
  font: inherit;
  font-size: 13px;
}
.search input:focus {
  outline: 1px solid var(--accent-dim);
  border-color: var(--accent-dim);
}
.pages {
  overflow: auto;
  padding: 6px 8px 24px;
  flex: 1;
}
.group {
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  padding: 14px 8px 6px;
}
.pages a.page {
  display: block;
  color: var(--text);
  padding: 7px 10px;
  border-radius: 5px;
  font-size: 13px;
  line-height: 1.3;
}
.pages a.page:hover {
  background: #1a1f23;
  text-decoration: none;
}
.pages a.page.active {
  background: #1a1f23;
  color: var(--accent);
  box-shadow: inset 2px 0 0 var(--accent);
}
.pages a.page.hidden { display: none }

.shell {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}
.top {
  display: none;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
  align-items: center;
  gap: 10px;
}
.top button {
  background: #1a1f23;
  border: 1px solid var(--line);
  color: var(--text);
  padding: 8px 12px;
  border-radius: 5px;
  cursor: pointer;
  font: inherit;
}
.layout {
  flex: 1;
  display: flex;
  min-height: 0;
}
.article-wrap {
  flex: 1;
  min-width: 0;
  overflow: auto;
}
article {
  max-width: 860px;
  padding: 28px 36px 80px;
}
.toc {
  width: var(--toc);
  flex: 0 0 var(--toc);
  border-left: 1px solid var(--line);
  padding: 28px 16px 40px 0;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: auto;
}
.toc h2 {
  margin: 0 0 10px 16px;
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.6px;
  text-transform: uppercase;
  font-weight: normal;
}
.toc a {
  display: block;
  color: var(--muted);
  font-size: 12px;
  padding: 4px 16px;
  line-height: 1.35;
}
.toc a:hover { color: var(--text); text-decoration: none }
.toc a.h3 { padding-left: 28px; font-size: 11px }
.toc a.active { color: var(--accent) }

.status {
  color: var(--muted);
  padding: 40px 8px;
  text-align: center;
}
.status.error { color: var(--danger) }
.hint {
  font-size: 13px;
  color: var(--muted);
  margin-top: 12px;
}
.hint code {
  background: #1a1f23;
  padding: 1px 6px;
  border-radius: 3px;
}

.md h1 {
  margin: 0 0 12px;
  font-size: 28px;
  letter-spacing: 0.3px;
}
.md h2 {
  margin: 32px 0 12px;
  padding-top: 8px;
  font-size: 18px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 8px;
}
.md h3 {
  margin: 24px 0 10px;
  font-size: 15px;
}
.md p, .md li {
  line-height: 1.55;
  font-size: 14px;
}
.md p { margin: 0 0 12px }
.md ul, .md ol { padding-left: 22px; margin: 0 0 14px }
.md li { margin: 0 0 6px }
.md hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 24px 0;
}
.md code {
  font-family: Consolas, "Courier New", monospace;
  font-size: 0.92em;
  background: #1a1f23;
  border: 1px solid var(--line);
  padding: 1px 5px;
  border-radius: 3px;
}
.md pre {
  background: #1a1f23;
  border: 1px solid var(--line);
  padding: 12px 14px;
  overflow: auto;
  border-radius: 5px;
  margin: 0 0 16px;
}
.md pre code {
  background: none;
  border: 0;
  padding: 0;
  font-size: 13px;
}
.md table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 18px;
  font-size: 13px;
  display: block;
  overflow-x: auto;
}
.md th, .md td {
  border: 1px solid var(--line);
  padding: 7px 10px;
  text-align: left;
  vertical-align: top;
}
.md th {
  background: #1a1f23;
  font-weight: bold;
  white-space: nowrap;
}
.md tr:nth-child(even) td { background: #12171b }
.md strong { color: #fff }

.menu-open .nav { display: flex }

@media (max-width: 1100px) {
  .toc { display: none }
}
@media (max-width: 820px) {
  body { display: block }
  .nav {
    display: none;
    position: fixed;
    z-index: 20;
    width: min(var(--nav), 86vw);
  }
  .menu-open .nav { display: flex }
  .top { display: flex }
  article { padding: 20px 18px 60px }
}