/* Оформление копии вики SmartSoft.
   Палитра взята из предметной области: справочник/документация, спокойные
   холодные тона, один акцент для навигации и ссылок. */

:root {
  --ink: #16202b;
  --ink-soft: #5a6b7d;
  --ink-faint: #8b99a8;
  --paper: #ffffff;
  --paper-dim: #f6f8fa;
  --line: #e2e8ee;
  --line-strong: #cbd6e0;
  --accent: #1f6feb;
  --accent-deep: #14508c;
  --accent-wash: #eef4fe;
  --radius: 6px;
  --sidebar-w: 288px;
  --content-w: 760px;
  --font-body: "Segoe UI", "Inter", system-ui, -apple-system, sans-serif;
  --font-display: "Georgia", "Times New Roman", serif;
  --font-mono: "Cascadia Code", "Consolas", monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-deep); text-decoration: underline; }
a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 3px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: #fff;
  padding: 8px 14px;
  z-index: 100;
}
.skip-link:focus { left: 8px; top: 8px; }

/* ---------- Верхняя панель ---------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 16px;
  height: 56px;
  padding: 0 20px;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 600;
  letter-spacing: -0.01em;
}
.brand:hover { text-decoration: none; color: var(--ink); }

.brand-mark {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 4px;
  background: var(--ink);
  color: #fff;
  font-family: var(--font-display);
  font-size: 17px;
  line-height: 1;
}

.brand-text { font-size: 15px; }

.search-open {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  min-width: 230px;
  padding: 7px 10px;
  background: var(--paper-dim);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink-faint);
  font: inherit;
  font-size: 13.5px;
  cursor: pointer;
  text-align: left;
}
.search-open:hover { border-color: var(--line-strong); color: var(--ink-soft); }

.search-icon {
  width: 13px;
  height: 13px;
  border: 1.8px solid currentColor;
  border-radius: 50%;
  position: relative;
  flex: none;
}
.search-icon::after {
  content: "";
  position: absolute;
  width: 6px;
  height: 1.8px;
  background: currentColor;
  transform: rotate(45deg);
  right: -4px;
  bottom: -2px;
}

.search-open kbd {
  margin-left: auto;
  padding: 1px 5px;
  border: 1px solid var(--line-strong);
  border-radius: 3px;
  background: #fff;
  font-family: var(--font-mono);
  font-size: 11px;
}

.menu-toggle {
  display: none;
  width: 34px;
  height: 34px;
  padding: 7px;
  background: none;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
}
.menu-toggle span {
  display: block;
  height: 1.6px;
  margin: 4px 0;
  background: var(--ink-soft);
}

/* ---------- Каркас ---------- */

.layout {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
  align-items: start;
}

.sidebar {
  position: sticky;
  top: 56px;
  height: calc(100vh - 56px);
  overflow-y: auto;
  padding: 22px 14px 40px 20px;
  border-right: 1px solid var(--line);
  background: var(--paper-dim);
}

.content {
  max-width: calc(var(--content-w) + 80px);
  padding: 28px 40px 96px;
}

/* ---------- Навигация ---------- */

.nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-list .nav-list { margin-left: 2px; }

.nav-item { margin: 0; }

.nav-link,
.nav-group {
  display: block;
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 13.5px;
  line-height: 1.45;
  color: var(--ink-soft);
}

.nav-link:hover { background: #e9eef4; color: var(--ink); text-decoration: none; }

.nav-link.is-active {
  background: var(--accent-wash);
  color: var(--accent-deep);
  font-weight: 600;
}

.nav-group {
  margin-top: 12px;
  padding-left: 8px;
  color: var(--ink-faint);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-children { margin-left: 9px; padding-left: 7px; border-left: 1px solid var(--line); }
.nav-children:empty { display: none; }

/* ---------- Статья ---------- */

.breadcrumbs {
  margin-bottom: 14px;
  color: var(--ink-faint);
  font-size: 12.5px;
}
.breadcrumbs a { color: var(--ink-soft); }
.breadcrumbs .sep { margin: 0 6px; color: var(--line-strong); }
.breadcrumbs .current { color: var(--ink-soft); }

.article-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 34px;
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 26px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
  color: var(--ink-faint);
  font-size: 12.5px;
}

.meta-tags { display: inline-flex; gap: 6px; }
.tag {
  padding: 1px 7px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--ink-soft);
  font-size: 11.5px;
}

/* ---------- Оглавление ---------- */

.toc {
  float: right;
  width: 210px;
  margin: 0 0 20px 26px;
  padding: 12px 14px;
  background: var(--paper-dim);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 13px;
}
.toc-title {
  margin: 0 0 8px;
  color: var(--ink-faint);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}
.toc ul { list-style: none; margin: 0; padding: 0; }
.toc li { margin: 3px 0; line-height: 1.4; }
.toc-h3 { padding-left: 11px; }
.toc a { color: var(--ink-soft); }
.toc a:hover { color: var(--accent); text-decoration: none; }

/* ---------- Тело статьи ---------- */

.article-body { max-width: var(--content-w); }

.article-body h1,
.article-body h2,
.article-body h3,
.article-body h4 {
  font-family: var(--font-body);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.01em;
  scroll-margin-top: 72px;
}
.article-body h1 { font-size: 27px; margin: 34px 0 12px; }
.article-body h2 {
  margin: 36px 0 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--line);
  font-size: 22px;
}
.article-body h3 { margin: 26px 0 10px; font-size: 17.5px; }
.article-body h4 { margin: 20px 0 8px; font-size: 15.5px; color: var(--ink-soft); }

.article-body p { margin: 0 0 14px; }
.article-body ul,
.article-body ol { margin: 0 0 16px; padding-left: 24px; }
.article-body li { margin: 5px 0; }
.article-body li > ul,
.article-body li > ol { margin: 5px 0; }

.article-body img {
  max-width: 100%;
  height: auto;
  margin: 8px 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.article-body a[href^="http"]::after {
  content: "\2197";
  margin-left: 2px;
  font-size: 0.78em;
  color: var(--ink-faint);
}

.article-body blockquote {
  margin: 16px 0;
  padding: 10px 16px;
  border-left: 3px solid var(--accent);
  background: var(--accent-wash);
  color: var(--ink-soft);
}

.article-body code {
  padding: 1px 5px;
  background: var(--paper-dim);
  border: 1px solid var(--line);
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 0.88em;
}
.article-body pre {
  overflow-x: auto;
  padding: 14px 16px;
  background: #f4f6f8;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.article-body pre code { padding: 0; background: none; border: none; }

.article-body table {
  width: 100%;
  margin: 16px 0;
  border-collapse: collapse;
  font-size: 14px;
}
.article-body th,
.article-body td {
  padding: 8px 12px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}
.article-body th { background: var(--paper-dim); font-weight: 600; }

.article-body hr {
  margin: 28px 0;
  border: none;
  border-top: 1px solid var(--line);
}

/* ---------- Поиск ---------- */

.search-overlay {
  position: fixed;
  inset: 0;
  z-index: 90;
  display: flex;
  justify-content: center;
  padding-top: 12vh;
  background: rgba(22, 32, 43, 0.42);
}
.search-overlay[hidden] { display: none; }

.search-panel {
  width: min(640px, calc(100vw - 32px));
  max-height: 70vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--paper);
  border-radius: 8px;
  box-shadow: 0 18px 48px rgba(22, 32, 43, 0.28);
}

#search-input {
  padding: 16px 18px;
  border: none;
  border-bottom: 1px solid var(--line);
  font: inherit;
  font-size: 16px;
  color: var(--ink);
}
#search-input:focus { outline: none; }

.search-results { overflow-y: auto; padding: 6px; }

.search-result {
  display: block;
  padding: 9px 12px;
  border-radius: var(--radius);
  color: var(--ink);
}
.search-result:hover,
.search-result.is-selected {
  background: var(--accent-wash);
  text-decoration: none;
}
.search-result-title { font-size: 14px; font-weight: 600; }
.search-result-section { color: var(--ink-faint); font-size: 11.5px; letter-spacing: 0.05em; text-transform: uppercase; }
.search-result-excerpt {
  margin-top: 2px;
  color: var(--ink-soft);
  font-size: 12.5px;
  line-height: 1.45;
}
.search-result-excerpt mark {
  background: #fff3bf;
  color: inherit;
  padding: 0 1px;
}

.search-empty {
  padding: 18px 14px 22px;
  color: var(--ink-faint);
  font-size: 13.5px;
  text-align: center;
}

.search-hint {
  margin: 0;
  padding: 8px 16px;
  border-top: 1px solid var(--line);
  color: var(--ink-faint);
  font-size: 11.5px;
}

/* ---------- Адаптивность ---------- */

@media (max-width: 980px) {
  .layout { grid-template-columns: 1fr; }

  .menu-toggle { display: block; }

  .sidebar {
    position: fixed;
    top: 56px;
    left: 0;
    z-index: 50;
    width: 300px;
    height: calc(100vh - 56px);
    transform: translateX(-100%);
    transition: transform 0.18s ease;
    box-shadow: 0 10px 30px rgba(22, 32, 43, 0.14);
  }
  .sidebar.is-open { transform: translateX(0); }

  .content { padding: 22px 20px 80px; }
  .article-title { font-size: 28px; }
  .toc { float: none; width: auto; margin: 0 0 22px; }

  .search-open { min-width: 0; }
  .search-open span:not(.search-icon) { display: none; }
  .search-open kbd { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .sidebar { transition: none; }
}