/* База знаний ReconDoc — брендбук v2.
   Токены продублированы литералами: тащить frontend/src/styles.css в отдельный
   статический сайт неправильно, а расхождение держит сам брендбук. */

:root {
  --primary: #1b45c4;
  --primary-hover: #153596;
  --primary-tint: #e6ebfa;
  --primary-edge: #c8d3f4;
  --ochre: #b45309;
  --ochre-tint: #fbe8cf;
  --ok: #15803d;
  --ok-tint: #dcfce7;

  --bg: #ffffff;
  --bg-soft: #f7f8fa;
  --bg-sunk: #f0f2f6;
  --border: #e3e6ec;
  --border-soft: #eef0f4;
  --ink: #14181f;
  --text: #333a46;
  --text-2: #5c6675;
  --muted: #838d9c;

  --font: 'Golos Text', system-ui, -apple-system, sans-serif;
  --radius: 12px;
  --topbar-h: 60px;
  --sidebar-w: 276px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --primary: #7d93e4;
    --primary-hover: #9aabec;
    --primary-tint: #1c2440;
    --primary-edge: #2c3861;
    --ochre: #e0a45c;
    --bg: #0f1319;
    --bg-soft: #151a22;
    --bg-sunk: #1a2029;
    --border: #262d38;
    --border-soft: #1f252e;
    --ink: #eef1f6;
    --text: #ccd3dd;
    --text-2: #98a2b1;
    --muted: #6f7988;
    --ochre-tint: #33240f;
    --ok-tint: #10281a;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--topbar-h) + 16px); }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  font-variant-numeric: tabular-nums;
}

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

:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  border-radius: 4px;
}

.skip {
  position: absolute;
  left: -9999px;
}
.skip:focus {
  left: 12px;
  top: 12px;
  z-index: 100;
  background: var(--primary);
  color: #fff;
  padding: 10px 16px;
  border-radius: 8px;
}

/* ---------- шапка ---------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 20px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.brand:hover { text-decoration: none; }

.brand__mark {
  width: 27px;
  height: 27px;
  border-radius: 7px;
  background: var(--primary);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: none;
}

.brand__sub {
  font-weight: 500;
  font-size: 14px;
  color: var(--muted);
  padding-left: 10px;
  border-left: 1px solid var(--border);
}

.burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 36px;
  height: 36px;
  padding: 0 8px;
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
}
.burger span {
  display: block;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
}

.topbar__search {
  display: none;
  margin-left: auto;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-2);
  cursor: pointer;
}

/* ---------- раскладка ---------- */

.layout {
  display: flex;
  align-items: flex-start;
  gap: 40px;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 20px;
}

.sidebar {
  position: sticky;
  top: var(--topbar-h);
  flex: none;
  width: var(--sidebar-w);
  max-height: calc(100vh - var(--topbar-h));
  overflow-y: auto;
  padding: 24px 0 40px;
}

.main {
  flex: 1;
  min-width: 0;
  max-width: 800px;
  padding: 30px 0 90px;
}

/* ---------- поиск в сайдбаре ---------- */

.search-trigger {
  display: flex;
  align-items: center;
  gap: 9px;
  width: 100%;
  padding: 9px 12px;
  margin-bottom: 22px;
  font: inherit;
  font-size: 14.5px;
  color: var(--muted);
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 9px;
  cursor: pointer;
  text-align: left;
}
.search-trigger:hover { border-color: var(--primary-edge); color: var(--text-2); }
.search-trigger span { flex: 1; }

.search-trigger__kbd {
  font: inherit;
  font-size: 12px;
  padding: 1px 7px;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: var(--bg);
  color: var(--muted);
}

/* ---------- навигация ---------- */

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

.nav__top {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 8px 12px;
  border-radius: 9px;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--text);
  line-height: 1.35;
}
.nav__top:hover { background: var(--bg-soft); text-decoration: none; }

.nav__item.is-open > .nav__top {
  background: var(--primary-tint);
  color: var(--primary);
  font-weight: 600;
}

.nav__emoji { font-size: 15px; flex: none; }

.nav__sub {
  list-style: none;
  margin: 3px 0 10px;
  padding: 0 0 0 20px;
  border-left: 1px solid var(--border);
  margin-left: 21px;
}
.nav__sub a {
  display: block;
  padding: 6px 10px;
  font-size: 14px;
  color: var(--text-2);
  border-radius: 7px;
  line-height: 1.4;
}
.nav__sub a:hover { background: var(--bg-soft); color: var(--text); text-decoration: none; }
.nav__sub a.is-current {
  color: var(--primary);
  font-weight: 600;
  background: var(--primary-tint);
}

.sidebar__foot {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 26px;
  padding: 18px 12px 0;
  border-top: 1px solid var(--border);
  font-size: 14px;
}
.sidebar__foot a { color: var(--text-2); }
.sidebar__foot a:hover { color: var(--primary); }

/* ---------- главная ---------- */

.hero { padding: 26px 0 34px; border-bottom: 1px solid var(--border-soft); }
.hero h1 {
  margin: 0 0 10px;
  font-size: 34px;
  line-height: 1.15;
  letter-spacing: -0.025em;
  color: var(--ink);
}
.hero__lead {
  margin: 0 0 22px;
  font-size: 17px;
  color: var(--text-2);
  max-width: 60ch;
}

.hero__search {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  max-width: 460px;
  padding: 13px 16px;
  font: inherit;
  font-size: 15.5px;
  color: var(--muted);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 11px;
  cursor: pointer;
  text-align: left;
}
.hero__search:hover { border-color: var(--primary-edge); }

.hero__quick { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  font: inherit;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 9px;
  cursor: pointer;
}
.btn:hover { border-color: var(--primary-edge); text-decoration: none; }

.btn--primary {
  color: #fff;
  background: var(--primary);
  border-color: var(--primary);
}
.btn--primary:hover { background: var(--primary-hover); border-color: var(--primary-hover); color: #fff; }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
  padding: 30px 0;
}

.card {
  display: block;
  padding: 20px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
}
.card:hover {
  border-color: var(--primary-edge);
  background: var(--bg-soft);
  text-decoration: none;
}
.card__emoji { font-size: 22px; display: block; margin-bottom: 10px; }
.card__title { margin: 0 0 6px; font-size: 17px; color: var(--ink); letter-spacing: -0.01em; }
.card__desc { margin: 0 0 14px; font-size: 14.5px; color: var(--text-2); line-height: 1.5; }
.card__count { font-size: 13px; color: var(--muted); font-weight: 500; }

/* ---------- крошки и шапка коллекции ---------- */

.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: var(--muted);
  margin-bottom: 18px;
}
.crumbs a { color: var(--text-2); }
.crumbs > * + *::before { content: "/"; margin-right: 8px; color: var(--border); }

.chead { padding-bottom: 22px; border-bottom: 1px solid var(--border-soft); }
.chead__emoji { font-size: 28px; display: block; margin-bottom: 10px; }
.chead h1 { margin: 0 0 8px; font-size: 29px; letter-spacing: -0.022em; color: var(--ink); }
.chead__desc { margin: 0 0 10px; font-size: 16.5px; color: var(--text-2); max-width: 62ch; }
.chead__count { font-size: 13.5px; color: var(--muted); font-weight: 500; }

.rows { display: flex; flex-direction: column; padding-top: 6px; }

.row {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 16px 14px;
  margin: 0 -14px;
  border-radius: 10px;
  border-bottom: 1px solid var(--border-soft);
  color: var(--text);
}
.row:hover { background: var(--bg-soft); text-decoration: none; }
.row__body { flex: 1; min-width: 0; }
.row__title { display: block; font-size: 16px; font-weight: 600; color: var(--ink); margin-bottom: 3px; }
.row__desc { display: block; font-size: 14.5px; color: var(--text-2); line-height: 1.5; }
.row__min { flex: none; font-size: 13px; color: var(--muted); }

/* ---------- статья ---------- */

.doc h1 {
  margin: 0 0 12px;
  font-size: 31px;
  line-height: 1.2;
  letter-spacing: -0.024em;
  color: var(--ink);
}

.lead {
  margin: 0 0 10px;
  font-size: 17.5px;
  line-height: 1.55;
  color: var(--text-2);
  max-width: 64ch;
}

.amet {
  margin: 0 0 26px;
  font-size: 13.5px;
  color: var(--muted);
}

.doc__body { max-width: 68ch; }

.doc__body h2 {
  margin: 38px 0 12px;
  font-size: 21px;
  letter-spacing: -0.016em;
  color: var(--ink);
  scroll-margin-top: calc(var(--topbar-h) + 16px);
}
.doc__body h3 {
  margin: 28px 0 10px;
  font-size: 17.5px;
  letter-spacing: -0.01em;
  color: var(--ink);
  scroll-margin-top: calc(var(--topbar-h) + 16px);
}

.anchor {
  margin-left: 8px;
  color: var(--border);
  font-weight: 400;
  opacity: 0;
  transition: opacity .12s;
}
h2:hover .anchor, h3:hover .anchor, .anchor:focus { opacity: 1; text-decoration: none; }

.doc__body p { margin: 0 0 14px; }
.doc__body ul, .doc__body ol { margin: 0 0 16px; padding-left: 22px; }
.doc__body li { margin-bottom: 7px; }
.doc__body li > ul, .doc__body li > ol { margin: 7px 0 0; }
.doc__body strong { color: var(--ink); font-weight: 600; }

.doc__body code {
  font-family: ui-monospace, 'SF Mono', Menlo, monospace;
  font-size: 0.88em;
  padding: 2px 6px;
  background: var(--bg-sunk);
  border-radius: 5px;
  color: var(--ink);
}

.doc__body hr {
  margin: 30px 0;
  border: none;
  border-top: 1px solid var(--border-soft);
}

/* ---------- врезки ---------- */

.callout {
  position: relative;
  margin: 18px 0;
  padding: 13px 16px 13px 18px;
  background: var(--bg-soft);
  border-radius: 10px;
  font-size: 15px;
}
.callout::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  bottom: 10px;
  width: 3px;
  border-radius: 3px;
  background: var(--muted);
}
.callout p { margin: 0; }

.callout--tip::before { background: var(--primary); }
.callout--tip { background: var(--primary-tint); }
.callout--info::before { background: var(--muted); }
.callout--warn::before { background: var(--ochre); }
.callout--warn { background: var(--ochre-tint); }

/* ---------- две колонки ---------- */

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  margin: 20px 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.split__col { padding: 16px 18px; }
.split__col + .split__col {
  border-left: 1px solid var(--border);
  background: var(--bg-soft);
}
.split__col h4 {
  margin: 0 0 10px;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
}
.split__col + .split__col h4 { color: var(--text-2); }
.split__col ul { margin: 0; padding-left: 18px; }
.split__col li { font-size: 14.5px; margin-bottom: 6px; }
.split__col p { font-size: 14.5px; margin: 0 0 8px; }

/* ---------- таблицы ---------- */

.table-wrap { overflow-x: auto; margin: 20px 0; }

.doc__body table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
}
.doc__body th {
  text-align: left;
  padding: 9px 12px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.doc__body td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border-soft);
  vertical-align: top;
}
.doc__body tr:last-child td { border-bottom: none; }

/* ---------- содержание ---------- */

.toc {
  margin: 0 0 28px;
  padding: 14px 18px;
  background: var(--bg-soft);
  border-radius: 10px;
  max-width: 68ch;
}
.toc p {
  margin: 0 0 8px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted);
}
.toc ul { list-style: none; margin: 0; padding: 0; }
.toc li { margin-bottom: 5px; }
.toc a { font-size: 14.5px; color: var(--text-2); }
.toc a:hover { color: var(--primary); }

/* ---------- куда дальше и обратная связь ---------- */

.next {
  margin: 40px 0 0;
  padding: 20px 22px;
  background: var(--bg-soft);
  border-radius: var(--radius);
  max-width: 68ch;
}
.next h2 { margin: 0 0 12px; font-size: 16px; color: var(--ink); }
.next ul { list-style: none; margin: 0; padding: 0; }
.next li { margin-bottom: 8px; }
.next li::before { content: "→"; color: var(--muted); margin-right: 9px; }
.next a { font-size: 15px; font-weight: 500; }

.fb {
  margin: 26px 0 0;
  padding-top: 22px;
  border-top: 1px solid var(--border-soft);
  max-width: 68ch;
}
.fb p { margin: 0 0 12px; font-size: 15px; color: var(--text-2); }

/* ---------- модалка поиска ---------- */

.search-modal {
  position: fixed;
  inset: 0;
  z-index: 90;
  background: rgba(15, 19, 25, .45);
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 12vh 20px 20px;
}
.search-modal[hidden] { display: none; }

.search-modal__box {
  width: 100%;
  max-width: 600px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 20px 60px rgba(15, 19, 25, .25);
  overflow: hidden;
}

.search-modal__input {
  width: 100%;
  padding: 17px 20px;
  font: inherit;
  font-size: 16.5px;
  color: var(--ink);
  background: none;
  border: none;
  border-bottom: 1px solid var(--border);
  outline: none;
}
.search-modal__input::placeholder { color: var(--muted); }

.search-modal__results { max-height: 56vh; overflow-y: auto; }

.sres {
  display: block;
  padding: 12px 20px;
  border-bottom: 1px solid var(--border-soft);
  color: var(--text);
}
.sres:hover, .sres.is-active { background: var(--bg-soft); text-decoration: none; }
.sres__top { display: flex; align-items: baseline; gap: 10px; }
.sres__title { font-size: 15px; font-weight: 600; color: var(--ink); flex: 1; min-width: 0; }
/* Подпись коллекции не переносится и не сжимается: перенос на вторую строку
   ломал ритм списка сильнее, чем обрезанный заголовок. */
.sres__coll {
  flex: none;
  font-size: 12.5px;
  color: var(--muted);
  white-space: nowrap;
}
.sres__desc {
  display: block;
  font-size: 13.5px;
  color: var(--text-2);
  margin-top: 2px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.sres mark { background: var(--primary-tint); color: var(--primary); border-radius: 3px; padding: 0 2px; }

.sempty { padding: 22px 20px; font-size: 14.5px; color: var(--text-2); }
.sempty a { font-weight: 500; }

/* ---------- мобильная раскладка ---------- */

.nav-overlay {
  position: fixed;
  inset: var(--topbar-h) 0 0;
  z-index: 30;
  background: rgba(15, 19, 25, .4);
}

@media (max-width: 900px) {
  .burger { display: flex; }
  .topbar__search { display: flex; }
  .brand__sub { display: none; }

  .layout { padding: 0 18px; gap: 0; }

  .sidebar {
    position: fixed;
    top: var(--topbar-h);
    left: 0;
    bottom: 0;
    z-index: 35;
    width: 290px;
    max-height: none;
    padding: 20px 16px 40px;
    background: var(--bg);
    border-right: 1px solid var(--border);
    transform: translateX(-100%);
    transition: transform .18s ease;
  }
  .sidebar.is-open { transform: none; }
  .search-trigger { display: none; }

  .main { max-width: none; padding: 22px 0 70px; }
  .hero h1 { font-size: 27px; }
  .hero__lead { font-size: 16px; }
  .doc h1 { font-size: 25px; }
  .lead { font-size: 16.5px; }
  .cards { grid-template-columns: 1fr; }
  .split { grid-template-columns: 1fr; }
  .split__col + .split__col { border-left: none; border-top: 1px solid var(--border); }
  .search-modal { padding: 0; }
  .search-modal__box { max-width: none; height: 100%; border-radius: 0; border: none; }
  .search-modal__results { max-height: calc(100% - 60px); }
}

@media (min-width: 901px) {
  .nav-overlay { display: none; }
}

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