/* Рекурсия изнутри: дерево вызовов, забег, график. */
.rc-part { --plain: #475569; --memo: var(--ok); --hl: #e8ebf0; }

.rc-part { margin-top: 0.4rem; }
.rc-part + .rc-part { margin-top: 2.2rem; padding-top: 0.4rem; border-top: 1px solid var(--line); }
.rc-part h2 { margin-top: 1rem; }
.rc-cap { margin: -0.2rem 0 0.7rem; color: var(--muted); }
.rc-sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* Панель управления: строки встают в одну линию, если хватает ширины */
.rc-ctl { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem 1rem; padding: 0.8rem 1rem; }
.rc-row { display: flex; flex-wrap: wrap; align-items: center; gap: 0.6rem 1.1rem; }
.rc-lbl { font-weight: 600; margin-right: -0.5rem; }
.rc-seg { display: inline-flex; flex-wrap: wrap; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: #fff; }
.rc-seg button { font: inherit; min-height: 44px; padding: 0.35rem 0.75rem; border: 0; border-left: 1px solid var(--line); background: #fff; color: var(--ink); cursor: pointer; white-space: nowrap; }
.rc-seg button:first-child { border-left: 0; }
.rc-seg button:hover { background: var(--panel); }
.rc-seg button[aria-pressed="true"] { background: var(--ink); color: #fff; }
.rc-field { display: flex; align-items: center; gap: 0 0.5rem; min-width: 0; }
.rc-field label { white-space: nowrap; }
.rc-field output { display: inline-block; min-width: 1.3em; font-variant-numeric: tabular-nums; }
#tree-speed-out { min-width: 5.9em; } /* «500 шагов/с»: ползунок не прыгает */
.rc-field input[type="range"] { width: 8rem; min-width: 0; height: 44px; margin: 0; }
.rc-ctl .rc-row { gap: 0.5rem 1rem; }

/* Кнопки, счётчики и строка «что сейчас происходит» — прилипают под шапкой */
.rc-play { position: sticky; top: var(--rc-top, 0px); z-index: 5; display: flex; flex-wrap: wrap; align-items: center; gap: 0.4rem 1rem; margin: 0.5rem 0 0.6rem; padding: 0.4rem 0; background: #fff; border-bottom: 1px solid var(--line); }
.rc-btns { display: flex; gap: 0.5rem; }
.rc-btns .btn { min-width: 5.4rem; }
.rc-counts { display: flex; gap: 1.1rem; }
.rc-count b { display: inline-block; min-width: 2.2em; }
.rc-count { font-size: 1.05rem; white-space: nowrap; }
.rc-count b { font-size: 1.45rem; font-variant-numeric: tabular-nums; }

.rc-status { flex: 1 1 22rem; min-width: 0; min-height: 2.9em; margin: 0; font-weight: 600; padding-left: 0.6rem; border-left: 4px solid var(--line); display: flex; align-items: center; }
.rc-status.idle { font-weight: 400; color: var(--muted); }
.rc-status.w { border-left-color: var(--win); }
.rc-status.l { border-left-color: var(--lose); }
.rc-status.done { border-left-color: var(--ok); }
.rc-status:empty, .rc-status.idle { border-left-color: transparent; padding-left: 0; }
/* «А+» на проекторе: строка всегда под кнопками, во всю ширину */
@media (min-width: 701px) { html.big .rc-status { flex-basis: 100%; } }
/* с 744 px любой текст строки помещается в одну строку; уже — держим место под две */
@media (min-width: 744px) { html.big .rc-status { min-height: 1.5em; } }

/* Дерево и боковая панель */
.rc-stage { --cfs: 0.85rem; display: grid; grid-template-columns: minmax(0, 1fr) calc(var(--cfs) * 27 + 1.6rem); gap: 1rem; align-items: start; }
html.big .rc-stage { --cfs: 0.74rem; }
.rc-treebox { min-width: 0; }
.rc-tools { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0.4rem 1rem; margin-top: 0.4rem; }
.rc-legend { align-items: center; gap: 0.3rem 1rem; }
.rc-legend i.rc-sw-call { background: #fff; border: 2px solid var(--ink); border-radius: 50%; }
.rc-legend .rc-sw-move { margin-right: 0.3em; color: var(--muted); }
.rc-legend i.rc-sw-memo { background: #fff; border: 2px dashed var(--muted); border-radius: 50%; }
.rc-legend i.rc-sw-best { height: 4px; width: 1.4em; border-radius: 2px; background: var(--ok); vertical-align: 0.2em; }
.rc-legend i.rc-sw-plain { background: var(--plain); }
.rc-legend i.rc-sw-memo2 { background: var(--memo); }
.rc-fit[aria-pressed="true"] { background: var(--ink); color: #fff; border-color: var(--ink); }
.rc-wrap { position: relative; overflow-x: auto; overflow-y: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.rc-tree { display: block; }
/* пока скрипт не нарисовал дерево и код — держим их место (дерево n = 6), чтобы страница не прыгала */
.rc-tree:not([height]) { width: 100%; height: 20rem; }
.rc-code:empty { min-height: calc(6 * 1.55em + 0.9rem + 2px); }
.rc-ptable:empty { min-height: 3rem; }
.rc-note { margin: 0.4rem 0 0; font-weight: 600; color: var(--bad); }

.rc-tree .rc-e { stroke: #a3abb8; stroke-width: 1.6; transition: stroke 0.2s; }
.rc-tree .rc-e.on { stroke: var(--ink); stroke-width: 3; }
.rc-tree .rc-e.best { stroke: var(--ok); stroke-width: 4; }
.rc-tree .rc-el { font-size: var(--efs, 15px); font-weight: 700; fill: var(--muted); paint-order: stroke; stroke: #fff; stroke-width: 4px; stroke-linejoin: round; dominant-baseline: central; }
.rc-tree .rc-nd .rc-c { fill: #fff; stroke: var(--ink); stroke-width: 2.5; transition: fill 0.25s, stroke 0.25s; }
.rc-tree .rc-nd .rc-t { font-size: 16px; font-weight: 800; text-anchor: middle; fill: var(--ink); font-variant-numeric: tabular-nums; }
.rc-tree .rc-nd.win .rc-c { fill: var(--win); stroke: var(--win); }
.rc-tree .rc-nd.lose .rc-c { fill: var(--lose); stroke: var(--lose); }
.rc-tree .rc-nd.win .rc-t, .rc-tree .rc-nd.lose .rc-t { fill: #fff; }
.rc-tree .rc-nd.memo .rc-c { stroke-dasharray: 4 3; stroke-width: 2.5; }
.rc-tree .rc-nd.memo.win .rc-c { fill: var(--win-soft); stroke: var(--win); }
.rc-tree .rc-nd.memo.lose .rc-c { fill: var(--lose-soft); stroke: var(--lose); }
.rc-tree .rc-nd.memo .rc-t { font-size: 13px; fill: var(--ink); }
.rc-tree .rc-mt { font-size: var(--mtfs, 12.5px); text-anchor: middle; fill: var(--muted); font-weight: 600; }
.rc-tree.rc-nocap .rc-mt { display: none; }
.rc-tree .rc-ghost .rc-c { fill: #fff; stroke: var(--muted); stroke-dasharray: 5 4; }
.rc-tree .rc-ghost .rc-t { fill: var(--muted); }
.rc-tree .rc-badge circle { fill: #fff; stroke-width: 2; }
.rc-tree .rc-badge text { font-weight: 800; text-anchor: middle; }
.rc-tree .win .rc-badge circle { stroke: var(--win); }
.rc-tree .win .rc-badge text { fill: var(--win); }
.rc-tree .lose .rc-badge circle { stroke: var(--lose); }
.rc-tree .lose .rc-badge text { fill: var(--lose); }
.rc-tree .rc-ring { fill: none; stroke: var(--ink); stroke-width: 2.5; stroke-dasharray: 5 3; }
.rc-tree.rc-tiny text { display: none; }
.rc-tree.rc-tiny .rc-badge { display: none; }
.rc-tree.rc-tiny .rc-e { stroke-width: 1; }
.rc-tree.rc-tiny .rc-e.on { stroke-width: 2; }
.rc-tree.rc-tiny .rc-e.best { stroke-width: 2; }
.rc-tree.rc-nolabels .rc-el { display: none; }

.rc-side { display: grid; gap: 0.8rem; min-width: 0; }
.rc-block { min-width: 0; }
.rc-block h3 { margin: 0 0 0.3rem; font-size: 0.95rem; color: var(--muted); }
.rc-code { margin: 0; padding: 0.45rem 0; font-size: var(--cfs); line-height: 1.55; border: 1px solid var(--line); background: var(--panel); overflow-x: auto; }
.rc-ln { display: block; width: max-content; min-width: 100%; padding: 0 0.5rem; border-left: 4px solid transparent; white-space: pre; }
.rc-ln.on { background: var(--hl); border-left-color: var(--ink); }
.rc-ln.on.w { background: var(--win-soft); border-left-color: var(--win); }
.rc-ln.on.l { background: var(--lose-soft); border-left-color: var(--lose); }
.rc-kw { color: #7c3aed; font-weight: 700; }
.rc-cm { color: #6b7280; font-style: italic; }

.rc-stack { font-family: var(--mono); font-size: 0.8rem; line-height: 2; min-height: 2.2em; }
.rc-fr { display: inline-block; padding: 0 0.35rem; border: 1px solid var(--line); border-radius: 6px; background: #fff; line-height: 1.6; white-space: nowrap; }
.rc-fr.top { border-color: var(--ink); font-weight: 700; }
.rc-fr.memo { border-style: dashed; }
.rc-fr.win { background: var(--win-soft); border-color: var(--win); }
.rc-fr.lose { background: var(--lose-soft); border-color: var(--lose); }
.rc-arrow { color: var(--muted); }

.rc-ptable { display: grid; grid-template-columns: repeat(auto-fill, minmax(2.6rem, 1fr)); gap: 4px; }
.rc-pc { display: flex; flex-direction: column; align-items: center; justify-content: center; height: 3rem; border-radius: 7px; background: var(--panel); border: 2px solid transparent; transition: background-color 0.2s; }
.rc-pc .rc-pn { font-size: 0.85rem; color: var(--muted); line-height: 1.05; }
.rc-pc .rc-pv { font-size: 1.15rem; line-height: 1.15; font-variant-numeric: tabular-nums; }
.rc-pc.win { background: var(--win-soft); }
.rc-pc.win .rc-pv { color: var(--win); }
.rc-pc.lose { background: var(--lose-soft); }
.rc-pc.lose .rc-pv { color: var(--lose); }
.rc-pc.hit { border-color: var(--ink); }

/* Забег */
.rc-start { min-width: 7rem; }
.rc-race { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-top: 1rem; }
.rc-lane { border: 1px solid var(--line); border-radius: var(--radius); padding: 0.8rem 1rem; min-width: 0; }
.rc-lane-h { font-weight: 700; font-size: 1.1rem; }
.rc-plain .rc-lane-h { color: var(--plain); }
.rc-memo .rc-lane-h { color: var(--memo); }
.rc-num { font-size: 3rem; margin: 0.2rem 0 0.4rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.rc-bar { height: 16px; background: var(--panel); border-radius: 8px; overflow: hidden; }
.rc-bar i { display: block; height: 100%; width: 0; border-radius: 8px; }
.rc-plain .rc-bar i { background: var(--plain); }
.rc-plain .rc-bar i.formula { background: repeating-linear-gradient(45deg, var(--plain) 0 8px, #7b8798 8px 16px); }
.rc-memo .rc-bar i { background: var(--memo); }
.rc-sub { margin-top: 0.4rem; color: var(--muted); font-variant-numeric: tabular-nums; min-height: 1.45em; }
.rc-sum { min-height: 1.45em; font-weight: 600; margin: 0.8rem 0 0; }

/* График */
.rc-chart-h { margin-top: 1.8rem; }
.rc-chart { margin-top: 0.5rem; min-height: 4rem; }
.rc-chart-svg { display: block; }
.rc-chart-svg text { font-size: var(--fs, 15px); }
.rc-ch-grid { stroke: var(--line); stroke-width: 1; }
.rc-ch-tick { fill: var(--muted); text-anchor: middle; }
.rc-ch-n { fill: var(--ink); }
.rc-ch-n.cur { font-weight: 800; }
.rc-ch-cur { fill: var(--panel); }
.rc-ch-bar.plain { fill: var(--plain); }
.rc-ch-bar.memo { fill: var(--memo); }
.rc-ch-v { fill: var(--ink); font-variant-numeric: tabular-nums; paint-order: stroke; stroke: #fff; stroke-width: 3px; stroke-linejoin: round; }
.rc-ch-limit { stroke: var(--bad); stroke-width: 1.5; stroke-dasharray: 5 4; }
.rc-ch-limit-t { fill: var(--bad); font-weight: 600; }
.rc-chart-svg.anim .rc-ch-bar { transform-box: fill-box; transform-origin: left center; animation: rc-grow 0.6s ease-out both; }
@keyframes rc-grow { from { transform: scaleX(0); } }

.rc-tablewrap { overflow-x: auto; }
.rc-nums { border-collapse: collapse; min-width: 18rem; }
.rc-nums th, .rc-nums td { padding: 0.3rem 0.8rem; border-bottom: 1px solid var(--line); text-align: right; font-variant-numeric: tabular-nums; }
.rc-nums th { font-size: 0.9rem; color: var(--muted); }

/* Одна колонка: дерево во всю ширину, код и таблицы под ним */
@media (max-width: 1000px) {
  .rc-stage { grid-template-columns: minmax(0, 1fr); --cfs: min(0.85rem, calc((100vw * 0.545 - 3.2rem) / 27)); }
  .rc-side { grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); align-items: start; }
  .rc-side .rc-block:first-child { grid-row: span 2; }
}
/* Крупный шрифт на проекторе 1024: две колонки не помещаются */
@media (max-width: 1100px) {
  html.big .rc-stage { grid-template-columns: minmax(0, 1fr); --cfs: min(0.8rem, calc((100vw * 0.545 - 3.2rem) / 27)); }
  html.big .rc-side { grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); align-items: start; }
  html.big .rc-side .rc-block:first-child { grid-row: span 2; }
}
@media (max-width: 700px) {
  .rc-stage, html.big .rc-stage { --cfs: min(0.85rem, calc((100vw - 3.8rem) / 27)); }
  .rc-side, html.big .rc-side { grid-template-columns: minmax(0, 1fr); }
  .rc-side .rc-block:first-child, html.big .rc-side .rc-block:first-child { grid-row: auto; }
  .rc-race { grid-template-columns: 1fr; gap: 0.6rem; }
  .rc-num { font-size: 2.3rem; }
  .rc-ctl { padding: 0.7rem; }
  /* дерево сразу под кнопками, а память и скорость — под деревом, рядом с кодом */
  .rc-ui { display: flex; flex-direction: column; }
  .rc-ui .rc-ctl, .rc-ui .rc-stage { display: contents; }
  .rc-ui .rc-ctl > .rc-row { padding: 0.7rem; background: var(--panel); border-radius: var(--radius); }
  .rc-ui .rc-opts { order: 1; margin-top: 0.8rem; }
  .rc-ui .rc-side { order: 2; margin-top: 1rem; }
  .rc-field { flex-wrap: wrap; }
  .rc-field input[type="range"] { flex: 1 1 7rem; }
  /* четыре кнопки в один ряд */
  .rc-btns { flex: 1 1 100%; gap: 0.35rem; }
  .rc-btns .btn { flex: 1 1 auto; min-width: 0; padding: 0.5rem 0.3rem; }
  .rc-status { flex-basis: 100%; }
  .rc-count { font-size: 0.95rem; }
  .rc-count b { font-size: 1.25rem; }
}
@media (prefers-reduced-motion: reduce) {
  .rc-chart-svg.anim .rc-ch-bar { animation: none; }
  .rc-tree .rc-nd .rc-c, .rc-tree .rc-e, .rc-pc { transition: none; }
}