/**
 * Режим ?var=logic / calc на /ege-19-21/.
 * Переключатель — собственные классы (без header__calc-pill / task9-solve-mode).
 */

/* Заголовок «Задание 19» + переключатель в одной строке */
.task19-related-statement__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 0.75rem;
  margin: 0 0 0.65rem;
  flex-wrap: wrap;
}

.task19-related-statement__head .task19-related-statement__title {
  margin: 0;
  text-align: left;
  flex: 0 1 auto;
}

.task19-related-statement__head .task19-solve-mode {
  margin: 0 0 0 0;
  margin-left: auto;
  flex: 0 0 auto;
}

/* --- Контрастный переключатель (непрозрачный) --- */
body.neuroege-python-task19-page .task19-solve-mode--compact .task19-solve-mode__toggle {
  display: inline-grid;
  grid-template-columns: auto auto auto;
  gap: 3px;
  padding: 3px;
  border-radius: 999px;
  border: 1px solid #34d399;
  background: #0b1220;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.45);
}

body.neuroege-python-task19-page .task19-solve-mode--compact .task19-solve-mode__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.28rem;
  min-height: 1.55rem;
  margin: 0;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  border: 1px solid #475569;
  background: #1e293b;
  color: #f8fafc;
  font-family: var(--font-body, "DM Sans", system-ui, sans-serif);
  font-size: 0.625rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  line-height: 1.1;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  opacity: 1;
  filter: none;
  text-shadow: none;
  box-shadow: none;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

body.neuroege-python-task19-page .task19-solve-mode--compact .task19-solve-mode__btn:hover {
  background: #334155;
  border-color: #94a3b8;
  color: #fff;
}

body.neuroege-python-task19-page .task19-solve-mode--compact .task19-solve-mode__btn:focus-visible {
  outline: 2px solid #6ee7b7;
  outline-offset: 2px;
}

body.neuroege-python-task19-page .task19-solve-mode--compact .task19-solve-mode__btn--active.task19-solve-mode__btn--python {
  background: #2563eb;
  border-color: #93c5fd;
  color: #fff;
}

body.neuroege-python-task19-page .task19-solve-mode--compact .task19-solve-mode__btn--active.task19-solve-mode__btn--calc {
  background: #059669;
  border-color: #6ee7b7;
  color: #fff;
}

body.neuroege-python-task19-page .task19-solve-mode--compact .task19-solve-mode__btn--active.task19-solve-mode__btn--logic {
  background: #f59e0b;
  border-color: #fde68a;
  color: #1c1917;
}

body.neuroege-python-task19-page .task19-solve-mode--compact .task19-solve-mode__label {
  white-space: nowrap;
}

body.neuroege-python-task19-page .task19-solve-mode--compact .task19-solve-mode__icon--python {
  width: 12px;
  height: 12px;
  display: block;
  filter: brightness(1.4) contrast(1.15);
}

body.neuroege-python-task19-page .task19-solve-mode--compact .task19-solve-mode__icon--calc {
  width: 0.65rem;
  height: 0.65rem;
  border-radius: 0.12rem;
  background: currentColor;
}

body.neuroege-python-task19-page .task19-solve-mode--compact .task19-solve-mode__icon--logic {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 0.7rem;
  height: 0.7rem;
  font-size: 0.65rem;
  line-height: 1;
  color: inherit;
}

[data-theme="light"] body.neuroege-python-task19-page .task19-solve-mode--compact .task19-solve-mode__toggle {
  border-color: #059669;
  background: #ffffff;
  box-shadow: 0 2px 10px rgba(15, 23, 42, 0.12);
}

[data-theme="light"] body.neuroege-python-task19-page .task19-solve-mode--compact .task19-solve-mode__btn {
  background: #f1f5f9;
  border-color: #94a3b8;
  color: #0f172a;
}

[data-theme="light"] body.neuroege-python-task19-page .task19-solve-mode--compact .task19-solve-mode__btn:hover {
  background: #e2e8f0;
  border-color: #64748b;
  color: #020617;
}

[data-theme="light"] body.neuroege-python-task19-page .task19-solve-mode--compact .task19-solve-mode__btn--active.task19-solve-mode__btn--python {
  background: #2563eb;
  border-color: #1d4ed8;
  color: #fff;
}

[data-theme="light"] body.neuroege-python-task19-page .task19-solve-mode--compact .task19-solve-mode__btn--active.task19-solve-mode__btn--calc {
  background: #059669;
  border-color: #047857;
  color: #fff;
}

[data-theme="light"] body.neuroege-python-task19-page .task19-solve-mode--compact .task19-solve-mode__btn--active.task19-solve-mode__btn--logic {
  background: #f59e0b;
  border-color: #d97706;
  color: #1c1917;
}

.task-view--logic,
.task-view--calc {
  flex: 1 1 auto;
  min-height: 0;
  height: 100%;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

body.neuroege-task19-logic-mode .task-solve__left,
body.neuroege-task19-logic-mode .task-solve__left > .task-view--logic {
  min-height: 0;
  height: 100%;
}

/* display:flex выше перебивает UA [hidden]{display:none} */
.task-view--logic[hidden],
.task-view--calc[hidden],
.task-view--sandbox[hidden],
[data-task19-engine-panel][hidden] {
  display: none !important;
}

.task19-logic-panel {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  flex: 1 1 auto;
  min-height: 0;
  height: 100%;
  padding: 0.85rem 1rem 1.1rem;
  box-sizing: border-box;
  background:
    radial-gradient(ellipse at 20% 0%, rgba(245, 158, 11, 0.12), transparent 45%),
    linear-gradient(165deg, rgba(15, 23, 42, 0.72), rgba(2, 6, 23, 0.55));
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 0.75rem;
}

.task19-logic-panel__header {
  flex: 0 0 auto;
}

.task19-logic-panel__title,
.task19-calc-panel__title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
  color: #f8fafc;
}

.task19-logic-panel__summary,
.task19-calc-panel__body {
  margin: 0.35rem 0 0;
  color: rgba(226, 232, 240, 0.88);
  font-size: 0.875rem;
  line-height: 1.45;
}

.task19-logic-panel__canvas {
  flex: 1 1 auto;
  min-height: 0;
  height: 100%;
  border-radius: 0.6rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.03), transparent),
    rgba(2, 6, 23, 0.45);
  overflow: auto;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  overscroll-behavior: contain;
}

.task19-logic-graph-host {
  flex: 0 0 auto;
  width: 100%;
  min-width: 100%;
  min-height: 0;
  padding: 0.35rem 0.25rem;
  box-sizing: border-box;
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.task19-logic-graph-svg {
  display: block;
  max-width: none;
  color: rgba(148, 163, 184, 0.9);
  cursor: zoom-in;
}

.task19-logic-edge line {
  stroke: #94a3b8;
  stroke-width: 2.5;
}

.task19-logic-arrow-head {
  fill: #94a3b8;
  stroke: none;
}

.task19-logic-edge__label {
  fill: rgba(226, 232, 240, 0.92);
  font-weight: 700;
  text-anchor: middle;
  pointer-events: none;
}

.task19-logic-level-label {
  fill: #fde68a;
  font-weight: 800;
  letter-spacing: 0.02em;
  text-anchor: start;
  dominant-baseline: middle;
  pointer-events: none;
}

.task19-logic-node__dot {
  fill: #1e293b;
  stroke: rgba(148, 163, 184, 0.75);
  stroke-width: 2.5;
  transition: fill 0.2s ease, stroke 0.2s ease, filter 0.2s ease;
}

.task19-logic-node__label {
  fill: #f8fafc;
  font-weight: 800;
  text-anchor: middle;
  dominant-baseline: middle;
  pointer-events: none;
}

.task19-logic-node--ghost {
  opacity: 0.28;
  transition: opacity 0.35s ease;
}

.task19-logic-node--revealed {
  opacity: 1;
  transition: opacity 0.35s ease;
}

.task19-logic-edge--ghost {
  opacity: 0.2;
  transition: opacity 0.35s ease;
}

.task19-logic-node__label--pop {
  animation: task19-logic-label-pop 0.55s ease-out;
}

@keyframes task19-logic-label-pop {
  0% {
    opacity: 0.2;
    transform: scale(0.7);
  }
  55% {
    opacity: 1;
    transform: scale(1.18);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

.task19-logic-node--start .task19-logic-node__dot {
  fill: #1d4ed8;
  stroke: #93c5fd;
}

.task19-logic-node--play .task19-logic-node__dot {
  fill: #334155;
  stroke: #94a3b8;
}

.task19-logic-node--win .task19-logic-node__dot {
  fill: #047857;
  stroke: #6ee7b7;
}

/* Две кучи: левый и правый круги разными оттенками */
.task19-logic-node--pair.task19-logic-node--play .task19-logic-node__dot--heap-a {
  fill: #1e3a5f;
  stroke: #7dd3fc;
}

.task19-logic-node--pair.task19-logic-node--play .task19-logic-node__dot--heap-b {
  fill: #44403c;
  stroke: #fcd34d;
}

.task19-logic-node--pair.task19-logic-node--start .task19-logic-node__dot--heap-a {
  fill: #1d4ed8;
  stroke: #93c5fd;
}

.task19-logic-node--pair.task19-logic-node--start .task19-logic-node__dot--heap-b {
  fill: #b45309;
  stroke: #fbbf24;
}

.task19-logic-node--pair.task19-logic-node--win .task19-logic-node__dot--heap-a {
  fill: #047857;
  stroke: #6ee7b7;
}

.task19-logic-node--pair.task19-logic-node--win .task19-logic-node__dot--heap-b {
  fill: #0f766e;
  stroke: #5eead4;
}

.task19-logic-node--active .task19-logic-node__dot {
  filter: drop-shadow(0 0 10px rgba(251, 191, 36, 0.85));
  stroke: #fbbf24;
  stroke-width: 3;
  animation: task19-logic-pulse 1.1s ease-in-out infinite alternate;
}

.task19-logic-node--active {
  animation: task19-logic-node-enter 0.35s ease-out;
}

@keyframes task19-logic-node-enter {
  from {
    opacity: 0.4;
  }
  to {
    opacity: 1;
  }
}

@keyframes task19-logic-pulse {
  from {
    transform: scale(1);
  }
  to {
    transform: scale(1.06);
  }
}

.task19-logic-panel__legend {
  flex: 0 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.task19-logic-panel__steps {
  flex: 0 1 auto;
  max-height: 18vh;
  overflow: auto;
  margin: 0;
  padding: 0;
  list-style: none;
  display: none;
  flex-direction: column;
  gap: 0.45rem;
}

.task19-logic-panel__steps--explain {
  display: flex;
}

.task19-logic-legend__item {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.75rem;
  color: rgba(226, 232, 240, 0.8);
}

.task19-logic-legend__item::before {
  content: "";
  width: 0.65rem;
  height: 0.65rem;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.35);
}

.task19-logic-legend__item--start::before {
  background: #1d4ed8;
}

.task19-logic-legend__item--play::before {
  background: #334155;
}

.task19-logic-legend__item--win::before {
  background: #047857;
}

.task19-logic-step {
  padding: 0.55rem 0.7rem;
  border-radius: 0.5rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(15, 23, 42, 0.45);
  cursor: pointer;
  opacity: 0.72;
  transition: border-color 0.2s ease, background 0.2s ease, opacity 0.25s ease,
    transform 0.25s ease;
}

.task19-logic-step:hover,
.task19-logic-step--active {
  opacity: 1;
  border-color: rgba(251, 191, 36, 0.45);
  background: rgba(245, 158, 11, 0.12);
  transform: translateX(2px);
}

.task19-logic-step--played {
  opacity: 0.55;
}

.task19-logic-step__title {
  display: block;
  color: #fde68a;
  font-size: 0.8125rem;
  margin-bottom: 0.2rem;
}

.task19-logic-step__voice {
  display: block;
  color: rgba(226, 232, 240, 0.88);
  font-size: 0.8125rem;
  line-height: 1.4;
}

.task19-logic-graph-empty {
  margin: 2rem 1rem;
  text-align: center;
  color: rgba(226, 232, 240, 0.7);
}

[data-theme="light"] .task19-logic-panel {
  background:
    radial-gradient(ellipse at 20% 0%, rgba(245, 158, 11, 0.1), transparent 45%),
    linear-gradient(165deg, #fff7ed, #f8fafc);
  border-color: rgba(15, 23, 42, 0.1);
}

[data-theme="light"] .task19-logic-panel__title,
[data-theme="light"] .task19-calc-panel__title {
  color: #0f172a;
}

[data-theme="light"] .task19-logic-panel__summary,
[data-theme="light"] .task19-calc-panel__body,
[data-theme="light"] .task19-logic-step__voice,
[data-theme="light"] .task19-logic-legend__item {
  color: #334155;
}

[data-theme="light"] .task19-logic-panel__canvas {
  background: #fff;
  border-color: rgba(15, 23, 42, 0.08);
}

[data-theme="light"] .task19-logic-node__label {
  fill: #0f172a;
}

.task19-logic-node--start .task19-logic-node__label,
.task19-logic-node--win .task19-logic-node__label {
  fill: #fff;
}

[data-theme="light"] .task19-logic-node--play .task19-logic-node__label {
  fill: #f8fafc;
}

[data-theme="light"] .task19-logic-edge__label {
  fill: #475569;
}

[data-theme="light"] .task19-logic-edge line {
  stroke: #64748b;
}

[data-theme="light"] .task19-logic-arrow-head {
  fill: #64748b;
}

[data-theme="light"] .task19-logic-level-label {
  fill: #b45309;
}

@media (max-width: 768px) {
  .task19-related-statement__head {
    flex-wrap: nowrap;
    gap: 0.35rem;
  }

  body.neuroege-python-task19-page .task19-solve-mode--compact .task19-solve-mode__btn {
    padding: 0.18rem 0.4rem;
    min-height: 1.4rem;
  }
}

/* --- Панель «Покажи как» (логика) — как ege-4 --- */
#task19-logic-explain-panel.task19-logic-explain-panel {
  margin: 0 0 0.45rem;
  padding: 0.55rem 0.75rem 0.65rem;
  border-radius: 12px;
  border: 1px solid color-mix(in srgb, #14b8a6 42%, transparent);
  background: linear-gradient(
    180deg,
    color-mix(in srgb, #134e4a 55%, #0f172a 45%) 0%,
    color-mix(in srgb, #0f172a 80%, #115e59 20%) 100%
  );
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06) inset;
  box-sizing: border-box;
}

#task19-logic-explain-panel #task19-logic-title {
  margin: 0 0 0.35rem;
}

#task19-logic-explain-panel .task19-logic-panel__summary {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.4;
  color: rgba(226, 232, 240, 0.78);
}

[data-theme="light"] #task19-logic-explain-panel.task19-logic-explain-panel {
  background: linear-gradient(
    180deg,
    color-mix(in srgb, #ecfdf5 70%, #ffffff 30%) 0%,
    color-mix(in srgb, #f8fafc 85%, #ccfbf1 15%) 100%
  );
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.65) inset;
}

[data-theme="light"] #task19-logic-explain-panel .task19-logic-panel__summary {
  color: #475569;
}

.task19-logic-explain-panel__body[hidden],
.task19-logic-explain-panel__chrome-wrap[hidden] {
  display: none !important;
}

#ege-task19-logic-explain-chrome {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 0.55rem;
  width: 100%;
  margin: 0 0 0.35rem;
  padding: 0.1rem 0;
  box-sizing: border-box;
}

#ege-task19-logic-explain-chrome .ege-task18-explain-chrome__group--tools {
  margin-left: auto;
}

.task19-logic-explain-panel__body {
  --task19-logic-narration-h: 3.25rem;
  min-height: var(--task19-logic-narration-h);
  margin-top: 0.2rem;
}

.task19-logic-step-narration {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  margin: 0;
  padding: 0.3rem 0.7rem;
  min-height: var(--task19-logic-narration-h);
  border-radius: 8px;
  font-size: 0.98rem;
  font-weight: 650;
  line-height: 1.3;
  color: #ecfdf5;
  background: color-mix(in srgb, #0f766e 28%, transparent);
  border: 1px solid color-mix(in srgb, #2dd4bf 35%, transparent);
  box-sizing: border-box;
}

.task19-logic-step-narration--anim {
  animation: task19-logic-narration-in 0.35s ease-out;
}

@keyframes task19-logic-narration-in {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

[data-theme="light"] .task19-logic-step-narration {
  color: #115e59;
  background: color-mix(in srgb, #ccfbf1 55%, #ffffff 45%);
  border-color: color-mix(in srgb, #14b8a6 30%, transparent);
}