.rnx {
  --rnx-navy: #1d3a63;
  --rnx-ink: #142a47;
  --rnx-cyan: #5fd3e0;
  --rnx-blue: #2f6fb5;
  --rnx-line: #d3e1ef;
  --rnx-soft: #eef5fb;
  --rnx-muted: #51617a;
  --rnx-ok: #1e7a4c;
  --rnx-bad: #b3261e;
  margin: 0 0 36px;
  color: #1f2b3d;
  line-height: 1.55;
  scroll-margin-top: 90px;
}
.rnx *, .rnx *::before, .rnx *::after { box-sizing: border-box; }
.rnx .rnx-lead { margin: 0 0 18px; font-size: 17px; }
.rnx .rnx-note { margin: 12px 0 0; font-size: 14px; color: var(--rnx-muted); }
.rnx .rnx-disclaimer { margin-top: 20px; }

/* --- Вкладки --- */
.rnx .rnx-tabs { display: flex; gap: 6px; margin: 0; padding: 0; border-bottom: 3px solid var(--rnx-navy); }
.rnx .rnx-tab {
  flex: 1 1 0;
  min-height: 48px;
  margin: 0;
  padding: 10px 12px;
  border: 1px solid var(--rnx-line);
  border-bottom: 0;
  border-radius: 0;
  background: var(--rnx-soft);
  color: var(--rnx-navy);
  font: inherit;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.25;
  cursor: pointer;
}
.rnx .rnx-tab[aria-selected="true"] { background: var(--rnx-navy); border-color: var(--rnx-navy); color: #fff; box-shadow: inset 0 4px 0 var(--rnx-cyan); }
.rnx .rnx-tab:hover { border-color: var(--rnx-blue); }

/* Без JS видно всі розділи одразу. */
.rnx:not(.rnx-js) .rnx-tabs { display: none; }
.rnx .rnx-panel { padding: 24px; border: 1px solid var(--rnx-line); border-top: 0; background: #fff; }
.rnx:not(.rnx-js) .rnx-panel { border-top: 1px solid var(--rnx-line); margin-bottom: 16px; }
.rnx .rnx-panel[hidden] { display: none; }

.rnx .rnx-h { margin: 0 0 10px; font-size: 24px; line-height: 1.25; color: var(--rnx-ink); }
.rnx .rnx-h3 { margin: 28px 0 10px; font-size: 19px; line-height: 1.3; color: var(--rnx-ink); }
.rnx .rnx-panel > p { margin: 0 0 16px; }

.rnx .rnx-grid { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: 22px; align-items: start; }
.rnx .rnx-grid-cut { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); align-items: center; }

/* --- Кнопки --- */
.rnx .rnx-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  margin: 0;
  padding: 9px 14px;
  border: 1px solid var(--rnx-line);
  border-radius: 0;
  background: #fff;
  color: var(--rnx-navy);
  font: inherit;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.3;
  text-align: left;
  cursor: pointer;
}
.rnx .rnx-btn:hover { border-color: var(--rnx-blue); }
.rnx .rnx-btn-main { background: var(--rnx-navy); border-color: var(--rnx-navy); color: #fff; font-weight: 700; }
.rnx .rnx-btn-main:hover { background: var(--rnx-blue); border-color: var(--rnx-blue); }
.rnx .rnx-chip[aria-pressed="true"] { background: var(--rnx-navy); border-color: var(--rnx-navy); color: #fff; }

.rnx button:focus-visible,
.rnx a:focus-visible { outline: 3px solid var(--rnx-cyan); outline-offset: 2px; }

/* --- Сегменти --- */
.rnx .rnx-seg-group { margin: 0 0 12px; padding: 10px 12px 12px; border-left: 5px solid var(--g, var(--rnx-blue)); background: var(--gs, var(--rnx-soft)); }
.rnx .rnx-g-c  { --g: #5fd3e0; --gs: #e9f9fb; }
.rnx .rnx-g-th { --g: #2f6fb5; --gs: #ebf2fa; }
.rnx .rnx-g-l  { --g: #1d3a63; --gs: #e8edf4; }
.rnx .rnx-g-s  { --g: #7a5cc4; --gs: #f1edf9; }
.rnx .rnx-g-co { --g: #8a94a6; --gs: #f1f3f6; }
.rnx .rnx-seg-name { margin: 0 0 8px; font-size: 14px; font-weight: 700; color: var(--rnx-ink); }
.rnx .rnx-seg-btns { display: grid; grid-template-columns: repeat(auto-fill, minmax(52px, 1fr)); gap: 6px; }
.rnx .rnx-seg {
  min-height: 44px;
  margin: 0;
  padding: 6px 4px;
  border: 1px solid var(--rnx-line);
  border-radius: 0;
  background: #fff;
  color: var(--rnx-ink);
  font: inherit;
  font-size: 15px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  cursor: pointer;
}
.rnx .rnx-seg:hover { border-color: var(--g, var(--rnx-blue)); }
.rnx .rnx-seg[aria-pressed="true"] { background: var(--rnx-navy); border-color: var(--rnx-navy); color: #fff; box-shadow: inset 0 -4px 0 var(--g, var(--rnx-cyan)); }

/* --- Блок пояснення --- */
.rnx .rnx-out { position: sticky; top: 90px; min-height: 120px; padding: 20px; background: var(--rnx-navy); color: #fff; }
.rnx .rnx-out p, .rnx .rnx-out li { color: #e3ecf7; font-size: 15px; }
.rnx .rnx-out p { margin: 0 0 10px; }
.rnx .rnx-out a { color: var(--rnx-cyan); font-weight: 700; }
.rnx .rnx-out .rnx-out-kicker { margin: 0 0 4px; font-size: 13px; font-weight: 700; letter-spacing: .03em; text-transform: uppercase; color: var(--rnx-cyan); }
.rnx .rnx-out .rnx-out-title { margin: 0 0 12px; font-size: 21px; line-height: 1.25; color: #fff; }
.rnx .rnx-out .rnx-out-title span { font-size: 15px; font-weight: 400; font-style: italic; color: #c2d2e8; }
.rnx .rnx-out-dl { margin: 0 0 12px; padding: 0; }
.rnx .rnx-out-dl div { display: flex; justify-content: space-between; gap: 12px; padding: 8px 0; border-top: 1px solid rgba(255, 255, 255, .2); border-bottom: 1px solid rgba(255, 255, 255, .2); }
.rnx .rnx-out-dl dt { margin: 0; font-size: 14px; font-weight: 400; color: #c2d2e8; }
.rnx .rnx-out-dl dd { margin: 0; font-size: 15px; font-weight: 700; color: #fff; text-align: right; }
.rnx .rnx-out-list { margin: 0; padding: 0 0 0 18px; }
.rnx .rnx-out-list li { margin: 0 0 6px; }
.rnx .rnx-out-list li::marker { color: var(--rnx-cyan); }

/* --- Таблиці --- */
.rnx .rnx-table-wrap { overflow-x: auto; }
.rnx .rnx-table { width: 100%; margin: 0; border-collapse: collapse; font-size: 15px; }
.rnx .rnx-table th, .rnx .rnx-table td { padding: 9px 10px; border: 1px solid var(--rnx-line); text-align: left; vertical-align: top; }
.rnx .rnx-table thead th { background: var(--rnx-soft); color: var(--rnx-ink); font-size: 14px; }
.rnx .rnx-table tbody th { color: var(--rnx-ink); }
.rnx .rnx-cr-num { width: 52px; font-weight: 700; color: var(--rnx-blue); font-variant-numeric: tabular-nums; }
.rnx .rnx-cr-table tr[hidden] { display: none; }
.rnx .rnx-cr-btn {
  display: block;
  width: 100%;
  min-height: 44px;
  margin: -9px -10px;
  padding: 9px 10px;
  width: calc(100% + 20px);
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--rnx-blue);
  font: inherit;
  font-weight: 700;
  text-align: left;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  cursor: pointer;
}
.rnx .rnx-cr-btn[aria-pressed="true"] { background: var(--rnx-navy); color: #fff; text-decoration: none; }
.rnx .rnx-type { display: inline-block; padding: 1px 8px; font-size: 13px; font-weight: 700; white-space: nowrap; }
.rnx .rnx-type-s { background: #e9f9fb; color: #0b5a63; }
.rnx .rnx-type-m { background: #ebf2fa; color: #1d4f8a; }
.rnx .rnx-type-x { background: #f1edf9; color: #553a9e; }
.rnx .rnx-filter { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 14px; }

/* --- Розріз --- */
.rnx .rnx-cut { margin: 0; }
.rnx .rnx-cut svg { display: block; width: 100%; height: auto; max-width: 440px; margin: 0 auto; }
.rnx .rnx-svg-cap { font-size: 12px; fill: var(--rnx-muted); }
.rnx .rnx-svg-part { cursor: pointer; transition: fill .15s, stroke .15s; }
.rnx .rnx-svg-white { fill: #f4f8fc; stroke: #9fb6d1; stroke-width: 2; }
.rnx .rnx-svg-grey path, .rnx .rnx-svg-grey rect { fill: #8a9bb3; stroke: #6c7f99; stroke-width: 1; }
.rnx .rnx-svg-canal { fill: #fff; stroke: #6c7f99; stroke-width: 2; }
.rnx .rnx-svg-root path { fill: none; stroke: #9fb6d1; stroke-width: 7; stroke-linecap: round; }
.rnx .rnx-svg-root ellipse { fill: #c7d6e8; stroke: #9fb6d1; stroke-width: 2; }
.rnx .rnx-svg-nerve path { stroke: #7f99ba; stroke-width: 9; }
.rnx .rnx-svg-line { fill: none; stroke: #9fb6d1; stroke-width: 2; pointer-events: none; }
.rnx .rnx-svg-white:hover { fill: #e5effa; }
.rnx .rnx-svg-grey:hover path, .rnx .rnx-svg-grey:hover rect { fill: #6f86a6; }
.rnx .rnx-svg-white.rnx-on { fill: #d8f4f8; stroke: var(--rnx-cyan); }
.rnx .rnx-svg-grey.rnx-on path, .rnx .rnx-svg-grey.rnx-on rect { fill: var(--rnx-cyan); stroke: #2aa9b8; }
.rnx .rnx-svg-canal.rnx-on { fill: var(--rnx-cyan); }
.rnx .rnx-svg-root.rnx-on path { stroke: var(--rnx-cyan); }
.rnx .rnx-svg-root.rnx-on ellipse { fill: var(--rnx-cyan); stroke: #2aa9b8; }
.rnx .rnx-part-btns { display: flex; flex-wrap: wrap; gap: 6px; margin: 0 0 14px; }
.rnx .rnx-part-btns .rnx-btn { padding: 8px 11px; font-size: 14px; }
.rnx .rnx-part-out { margin: 0; padding: 14px 16px; border-left: 4px solid var(--rnx-cyan); background: var(--rnx-soft); }

/* --- Дерево відділів --- */
.rnx .rnx-tree { display: flex; flex-direction: column; gap: 8px; }
.rnx .rnx-tree-cap { margin: 10px 0 0; font-size: 13px; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; color: var(--rnx-muted); }
.rnx .rnx-tree-row { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 10px; }
.rnx .rnx-tree-col { display: flex; flex-direction: column; gap: 6px; }
.rnx .rnx-node {
  min-height: 44px;
  margin: 0;
  padding: 9px 12px;
  border: 1px solid var(--rnx-blue);
  border-radius: 0;
  background: var(--rnx-soft);
  color: var(--rnx-ink);
  font: inherit;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.3;
  text-align: left;
  cursor: pointer;
}
.rnx .rnx-node-root { background: var(--rnx-blue); color: #fff; text-align: center; }
.rnx .rnx-node-sub { margin-left: 16px; border-color: var(--rnx-line); background: #fff; font-weight: 600; position: relative; }
.rnx .rnx-node-sub::before { content: ""; position: absolute; left: -12px; top: 50%; width: 10px; border-top: 2px solid var(--rnx-line); }
.rnx .rnx-node:hover { border-color: var(--rnx-navy); }
.rnx .rnx-node[aria-pressed="true"] { background: var(--rnx-navy); border-color: var(--rnx-navy); color: #fff; box-shadow: inset 4px 0 0 var(--rnx-cyan); }

/* --- Тести --- */
.rnx .rnx-quiz { margin: 28px 0 0; padding: 20px; border: 2px solid var(--rnx-cyan); background: #f6fcfd; }
.rnx .rnx-quiz .rnx-h3 { margin-top: 0; }
.rnx .rnx-quiz > p { margin: 0 0 14px; }
.rnx .rnx-quiz-count { margin: 0 0 4px; font-size: 13px; font-weight: 700; color: var(--rnx-muted); }
.rnx .rnx-quiz-q { margin: 0 0 12px; font-size: 18px; font-weight: 700; color: var(--rnx-ink); }
.rnx .rnx-quiz-opts { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 8px; }
.rnx .rnx-opt:disabled { cursor: default; opacity: 1; color: var(--rnx-muted); }
.rnx .rnx-opt.rnx-right { background: #e3f4ea; border-color: var(--rnx-ok); color: var(--rnx-ok); }
.rnx .rnx-opt.rnx-wrong { background: #fbe9e7; border-color: var(--rnx-bad); color: var(--rnx-bad); }
.rnx .rnx-quiz-fb { margin: 14px 0 0; }
.rnx .rnx-quiz-fb:empty { display: none; }
.rnx .rnx-quiz-fb .rnx-btn { margin: 10px 0 0; display: flex; }
.rnx .rnx-quiz-score { margin: 0 0 12px; font-size: 18px; font-weight: 700; color: var(--rnx-ink); }

/* --- Мобільна версія --- */
.rnx .rnx-sticky { display: none; }
@media (max-width: 767px) {
  .rnx .rnx-panel { padding: 18px 14px; }
  .rnx .rnx-grid, .rnx .rnx-grid-cut { grid-template-columns: minmax(0, 1fr); gap: 16px; }
  .rnx .rnx-out { position: static; }
  .rnx .rnx-tab { padding: 8px 6px; font-size: 14px; }
  .rnx .rnx-h { font-size: 21px; }
  .rnx .rnx-sticky {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 9990;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 16px calc(12px + env(safe-area-inset-bottom, 0px));
    background: var(--rnx-navy);
    color: #fff;
    font-size: 15px;
    font-weight: 700;
    line-height: 1.3;
    text-decoration: none;
    box-shadow: 0 -2px 12px rgba(0, 0, 0, .3);
  }
  .rnx .rnx-sticky[hidden] { display: none; }
  .rnx .rnx-sticky-more { flex: none; padding: 6px 12px; background: var(--rnx-cyan); color: var(--rnx-ink); font-size: 14px; }
}
@media (max-width: 560px) {
  .rnx .rnx-tree-row { grid-template-columns: minmax(0, 1fr); }
  /* Таблиця черепних нервів — картками */
  .rnx .rnx-cr-table thead { display: none; }
  .rnx .rnx-cr-table, .rnx .rnx-cr-table tbody { display: block; }
  .rnx .rnx-cr-table tr { display: grid; grid-template-columns: 48px minmax(0, 1fr) auto; margin: 0 0 8px; border: 1px solid var(--rnx-line); }
  .rnx .rnx-cr-table tr[hidden] { display: none; }
  .rnx .rnx-cr-table th, .rnx .rnx-cr-table td { border: 0; }
  .rnx .rnx-cr-table td:last-child { grid-column: 1 / -1; padding-top: 0; font-size: 14px; color: var(--rnx-muted); }
  .rnx .rnx-cr-table .rnx-cr-num { padding-top: 13px; }
  .rnx .rnx-cr-table .rnx-cr-btn { margin: -9px 0; width: 100%; padding: 9px 4px; }
}
@media (prefers-reduced-motion: reduce) {
  .rnx .rnx-svg-part { transition: none; }
}

/* Таблиці картками на вузьких екранах */
.rnx [hidden] { display: none !important; }
.rnx .rnx-out-dl div { flex-wrap: wrap; }
.rnx .rnx-out-dl dd { margin-left: auto; }
@media (max-width: 560px) {
  .rnx .rnx-cards thead { display: none; }
  .rnx .rnx-cards, .rnx .rnx-cards tbody, .rnx .rnx-cards tr, .rnx .rnx-cards th, .rnx .rnx-cards td { display: block; width: 100%; }
  .rnx .rnx-cards tr { margin: 0 0 8px; border: 1px solid var(--rnx-line); }
  .rnx .rnx-cards th, .rnx .rnx-cards td { border: 0; }
  .rnx .rnx-cards tbody th { background: var(--rnx-soft); }
  .rnx .rnx-cards td { display: flex; justify-content: space-between; gap: 12px; padding: 6px 10px; border-top: 1px solid var(--rnx-line); }
  .rnx .rnx-cards td::before { content: attr(data-label); flex: 0 0 42%; font-size: 13px; font-weight: 700; color: var(--rnx-muted); }
}

/* --- FAQ під атласом (поза блоком .rnx, тому окремий префікс) --- */
.rnx-faq { margin: 0 0 24px; border-top: 1px solid #d3e1ef; }
.rnx-faq-item { margin: 0; border-bottom: 1px solid #d3e1ef; }
.rnx-faq-item summary {
  position: relative;
  display: block;
  min-height: 44px;
  padding: 14px 44px 14px 0;
  color: #142a47;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.35;
  cursor: pointer;
  list-style: none;
}
.rnx-faq-item summary::-webkit-details-marker { display: none; }
.rnx-faq-item summary::after {
  content: "";
  position: absolute;
  right: 8px;
  top: 50%;
  width: 22px;
  height: 22px;
  margin-top: -11px;
  background:
    linear-gradient(#1d3a63, #1d3a63) center / 12px 2px no-repeat,
    linear-gradient(#1d3a63, #1d3a63) center / 2px 12px no-repeat,
    #e9f9fb;
  border: 1px solid #5fd3e0;
}
.rnx-faq-item[open] summary::after { background: linear-gradient(#fff, #fff) center / 12px 2px no-repeat, #1d3a63; border-color: #1d3a63; }
.rnx-faq-item summary:hover { color: #2f6fb5; }
.rnx-faq-item .rnx-faq-q { margin: 0; padding: 0; font: inherit; color: inherit; line-height: inherit; }
.rnx-faq-item summary:focus-visible { outline: 3px solid #5fd3e0; outline-offset: 2px; }
.rnx-faq-a { padding: 0 0 16px; }
.rnx-faq-a p { margin: 0; }