/* .visu-console-text pre,
.visu-console-text code,
.visu-console-text p,
.visu-console-text h2,
.visu-console-text h3,
.visu-console-text h4,
.visu-console-text strong,
.visu-console-text span,
.visu-console-text ul,
 .visu-console-text hr, 
.visu-console-text li {
    margin: 0;
    padding: 0;
    font-size: inherit;
    font-weight: inherit;
    color: inherit;
    line-height: inherit;
    background: none;
    border: none;
	height: auto;
	width: auto;
} 
  */
 
 


.visu-visualizer {
  max-width: 1600px;
  margin: 20px auto;
  background: #0f0f0f;
  border-radius: 8px; 
  overflow: hidden;
  display: flex;
  flex-direction: column;
   color: #e0e0e0;
}

.visu-desc ,
.visu-header {
  background: linear-gradient(to right, #1a1a1a, #2d2d2d);
  padding: 16px 20px;
  border-bottom: 1px solid #333;
  display: flex;
  align-items: center;
  gap: 16px;
}

 
.visu-title {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 18px;
  font-weight: 600;
}

.visu-title-icon {
  font-size: 24px;
}

.visu-language-badge {
  background: linear-gradient(135deg, #667eea, #764ba2);
  padding: 4px 12px;
  border-radius: 16px;
  font-size: 12px;
  text-transform: uppercase;
}

.visu-controls {
  background: #1a1a1a;
  padding: 12px 20px;
  border-bottom: 1px solid #333;
}

.visu-controls-row {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.visu-controls-row:last-child {
  margin-bottom: 0;
}

.visu-btn-group {
  display: flex;
  gap: 8px;
}

.visu-btn {
  padding: 10px 16px;
  border-radius: 8px;
  border: 1px solid #444;
  background: linear-gradient(135deg, #2d2d2d, #252525);
  color: white;
  cursor: pointer;
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s;
}

.visu-btn:hover:not(:disabled) {
  background: linear-gradient(135deg, #3d3d3d, #353535);
  transform: translateY(-1px);
}

.visu-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none !important;
}

.visu-btn.visu-primary {
  background: linear-gradient(135deg, #4CAF50, #45a049);
}

.visu-btn.visu-warning {
  background: linear-gradient(135deg, #ff9800, #f57c00);
}

.visu-btn.visu-danger {
  background: linear-gradient(135deg, #f44336, #da190b);
}

.visu-progress-container {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 200px;
}

.visu-progress-bar {
  flex: 1;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  overflow: hidden;
}

.visu-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #667eea, #764ba2);
  width: 0%;
  transition: width 0.3s;
}

.visu-progress-fill.visu-completed {
  background: linear-gradient(90deg, #4CAF50, #45a049);
}

.visu-step-counter {
  color: #888;
  font-family: monospace;
}

.visu-step-counter .visu-current {
  color: #667eea;
  font-weight: 600;
}

.visu-speed-controls,
.visu-mode-selector {
  display: flex;
  align-items: center;
  gap: 8px;
}

.visu-speed-label,
.visu-mode-label-title {
  color: #888;
  font-size: 13px;
}

.visu-speed-btn,
.visu-mode-label {
  padding: 8px 14px;
  border-radius: 6px;
  border: 1px solid #444;
  cursor: pointer;
  font-size: 13px;
  transition: all 0.2s;
  background: transparent;
}

.visu-speed-btn {
  font-size: 18px;
}

.visu-mode-radio {
  display: none;
}

.visu-speed-btn:hover,
.visu-mode-label:hover {
  background: rgba(255, 255, 255, 0.1);
}

.visu-speed-btn.visu-active,
.visu-mode-radio:checked+.visu-mode-label {
  background: #667eea;
  border-color: #667eea;
  color: white;
}

.visu-main {
  display: flex;
 
height: calc(100vh -  100px )
  
}

.visu-history {
  width: 100%; 
  background: #1a1a1a;
  border-right: 1px solid #333;
  /*! overflow-y: auto; */
  flex-shrink: 0;
  position: relative;
  /*! height: 100%; */
}


#visu-history-list{
   overflow-y: auto; 
 
   max-height: 140px;
}

.visu-code-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: #0d0d0d;
  position: relative;
  width: calc(100% - 850px);
}

.visu-right-panel {
   min-width: 370px;  
 max-width: 470px;
  background: #0f0f0f;
  border-left: 1px solid #333;
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.visu-status-bar {
  background: #1a1a1a;
  border-top: 1px solid #333;
  padding: 8px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: #888;
}

.visu-status-message {
  display: flex;
  align-items: center;
  gap: 8px;
}

.visu-status-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #666;
}

.visu-status-indicator.visu-active {
  background: #4CAF50;
  animation: pulseStatus 2s infinite;
}

.visu-status-indicator.visu-paused {
  background: #ff9800;
}

@keyframes pulseStatus {
  50% {
    opacity: 0.5;
  }
}

.visu-history-header {
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid #333;
  font-size: 12px;
  color: #888;
  text-transform: uppercase;
}

.visu-history-item {
  padding: 6px;
  margin: 4px 8px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 8px;
  cursor: pointer;
  border-left: 3px solid transparent;
  transition: all 0.2s;
  display: flex;
  gap: 10px;
  align-items: center;
}

.visu-history-item:hover {
  background: rgba(255, 255, 255, 0.06);
  transform: translateX(4px);
}

.visu-history-item.visu-current {
  background: rgba(76, 175, 80, 0.1);
  border-left-color: #4CAF50;
}

.visu-history-step-number {
  font-size: 11px;
  color: #666;
  /*! margin-bottom: 4px; */
}

.visu-history-step-action {
  font-size: 12px;
  font-weight: 500;
  color: #fff;
} 

.visu-code-container {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  /*! max-height: 300px; */
  /*! flex: 1; */
}

.visu-code-line {
  display: flex;
  min-height: 1.5em;
  line-height: 1.6;
  font-family: 'Consolas', monospace;
  font-size: 14px;
  transition: all 0.3s;
}

.visu-code-line.visu-active {
  background: rgba(76, 175, 80, 0.15);
  box-shadow: inset 3px 0 0 #4CAF50;
}

.visu-line-number {
  width: 50px;
  text-align: right;
  padding-right: 16px;
  color: #666;
  user-select: none;
  cursor: pointer;
  position: relative;
}

.visu-line-number.visu-has-breakpoint::before {
  content: '●';
  position: absolute;
  left: 8px;
  color: #f44336;
}

.visu-line-content {
  flex: 1;
  padding-left: 12px;
  color: #d4d4d4;
  /*! white-space: pre; */
}

.visu-token-keyword {
  color: #569cd6;
  font-weight: 500;
}

.visu-token-string {
  color: #ce9178;
}

.visu-token-number {
  color: #b5cea8;
}

.visu-token-function {
  color: #dcdcaa;
}

.visu-token-variable {
  color: #9cdcfe;
}

.visu-token-comment {
  color: #6a9955;
  font-style: italic;
}

.visu-explanation { background: #1a1a1a; border-top: 1px solid #333; padding: 0;  overflow: hidden; transition: all 0.3s; /*! position: sticky; */bottom: 0;}

.visu-explanation.visu-hidden {
  max-height: 0 !important;
  padding: 0 !important;
  border: 0 !important;
  overflow: hidden !important;
}

.visu-explanation-header {
  padding: 12px 16px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.visu-explanation-title {
  font-size: 13px;
  color: #888;
}

.visu-explanation-content {
  padding: 0 16px 16px;
  color: #ccc;
  font-size: 14px;
  line-height: 1.6;
}

.visu-explanation-content code {
background: #515151;
 
padding: 0 5px;
}


.visu-explanation-action {
  display: inline-block;
  background: linear-gradient(135deg, #667eea, #764ba2);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 8px;
}

.visu-panel-section {
  border-bottom: 1px solid #333;
  padding: 16px;
}

.visu-panel-section:last-child {
  border-bottom: none;
}

.visu-panel-title {
  font-size: 13px;
  color: #888;
  text-transform: uppercase;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.visu-panel-content {
  flex: 1;
  overflow-y: auto;
}

.visu-variable-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid #333;
  /*! border-radius: 8px; */
  padding: 3px 6px;
  margin-bottom: -1px;
  transition: all 0.3s;
}

.visu-variable-item.visu-changed {
  animation: varChange 0.5s;
}

@keyframes varChange {
  50% {
    background: rgba(76, 175, 80, 0.2);
    transform: scale(1.02);
  }
}

.visu-var-header {
  display: inline-flex;
  gap: 8px;
  margin-bottom: 6px;
}

.visu-var-type {
  background: #333;
  color: #888;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 11px;
}

.visu-var-name {
  color: #9cdcfe;
  font-family: monospace;
  font-weight: 500;
}

.visu-var-name:after {
 content:'=';
  padding-left: 5px
}

.visu-var-value {
  color: #ce9178;
  font-family: monospace;
  font-size: 13px;
  padding-left: 5px;
 display: inline-flex
  
 
  
}

 

.visu-array-viz {
  background: #0d0d0d;
  border-radius: 8px;
}

.visu-array-container {
  display: flex;
  gap: 20px;
  align-items: flex-end;
  min-height: 150px;
  padding: 12px;
 
  margin-top: 50px;
}

.visu-array-item {
  min-width: 20px;
  background: linear-gradient(135deg, #2d2d2d, #1d1d1d);
  border: 2px solid #444;
  border-radius: 2px;
  padding: 5px;
  text-align: center;
  transition: all 0.4s;
  position: relative;
}

.visu-array-item.visu-active {
  background: linear-gradient(135deg, #667eea, #5a6fd0);
  border-color: #667eea;
  transform: translateY(-8px);
  box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
}

.visu-array-item.visu-comparing {
  background: linear-gradient(135deg, #ff9800, #e67c00);
  border-color: #ff9800;
  animation: pulseViz 0.6s infinite;
}

.visu-array-item.visu-sorted {
  background: linear-gradient(135deg, #4CAF50, #45a049);
  border-color: #4CAF50;
}

@keyframes pulseViz {
  50% {
    transform: translateY(-4px) scale(1.08);
  }
}

.visu-array-value {
  font-size: 14px;
 
  color: white;
  margin-bottom: 4px;
}

.visu-array-index {
  position: absolute;
  bottom: -20px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 11px;
  color: #666;
}

.visu-array-pointer {
  position: absolute;
  top: -30px;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
}

.visu-pointer-label {
  font-size: 12px;
  color: #667eea;
  font-weight: 600;
  text-transform: lowercase;
}

.visu-array-legend {
  display: flex;
  gap: 16px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid #333;
  font-size: 12px;
}




.visu-legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #888;
}

.visu-legend-color {
  width: 20px;
  height: 12px;
  border-radius: 4px;
}







/* Мини‑легенда и подсказка для массива */
.visu-array-legend-mini {
  margin-top: 15px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  font-size: 10.5px;
  color: #888;
}
.visu-array-legend-mini .visu-legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
}
.visu-array-legend-mini .visu-swatch {
  width: 11px; height: 11px;
  border-radius: 3px;
  border: 1px solid #333;
}
.visu-swatch-active    { background: linear-gradient(135deg, #667eea, #5a6fd0); border-color: #667eea; }
.visu-swatch-comparing { background: linear-gradient(135deg, #ff9800, #e67c00); border-color: #ff9800; }
.visu-swatch-sorted    { background: linear-gradient(135deg, #4CAF50, #45a049); border-color: #4CAF50; }

.visu-array-hint {
  margin-top: 6px;
  padding: 8px;
  background: rgba(102,126,234,.08);
  border-left: 2px solid #667eea;
  border-radius: 6px;
  color: #bbb;
  font-size: 10.5px;
  line-height: 1.45;
}
.visu-array-hint ul { margin: 4px 0 0 14px; padding: 0; }
.visu-array-hint li { margin: 2px 0; }

/* Чтобы несколько указателей (i, j, pivot) над одним столбцом красиво складывались */
.visu-array-pointer {
  display: flex;
  flex-direction: column;
  gap: 2px;
  align-items: center;
}




/* swatch для нейтрального (серого) столбца */
.visu-swatch-neutral {
  background: linear-gradient(135deg, #2d2d2d, #1d1d1d);
  border: 1px solid #444;
  border-radius: 3px;
  width: 11px;
  height: 11px;
}







.visu-console-output {
  background: #0d0d0d;
  border-radius: 8px;
  padding: 12px;
  font-family: monospace;
  font-size: 13px;
}

.visu-console-line {
  display: flex;
  gap: 8px;
  margin: 6px 0;
  align-items: center;
}

.visu-console-text {
  margin: 0;
  padding: 0;
  font-size: inherit;
  font-weight: inherit;
  line-height: inherit;
  background: none;
  border: none;
  color: #0f0;
}

.visu-stack-frame-item:hover {
  transform: translateX(-6px) !important;
  box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6) !important;
}

.visu-quiz-container {
  background: linear-gradient(135deg, #1a1a1a, #2d2d2d);
 
  padding: 0;
 display: none;
  /*! opacity: 0; */
 
}

.visu-quiz-container.visu-active {
display: block 
}

.visu-quiz-card {
 
  margin: 0 auto;
  background: rgba(0, 0, 0, 0.3);
 
  padding: 15px;
 
  min-height: 100%;
} 

.visu-quiz-header {
  text-align: center;
  margin-bottom: 20px;
}

.visu-quiz-icon {
  font-size: 38px;
  margin-bottom: 6px;
}

.visu-quiz-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
}

.visu-quiz-question { 
  font-size: 16px;
  color: #ccc;
  line-height: 1.3;
  background: rgba(102, 126, 234, 0.1);
  padding: 12px;
  border-radius: 12px;
  border-left: 4px solid #667eea;
}

.visu-quiz-options {
  display: grid;
  
  gap: 12px;
  margin: 20px 0;
}

.visu-quiz-option {
  background: linear-gradient(135deg, #2d2d2d, #1d1d1d);
  border: 2px solid #444;
  border-radius: 12px;
  padding: 6px;
  cursor: pointer;
  transition: all 0.3s;
  display: flex;
  gap: 16px;
  align-items: center;
  font-size: 15px;
}

.visu-quiz-option:hover {
  border-color: #667eea;
  transform: translateY(-4px);
}

.visu-quiz-option.visu-selected {
  border-color: #667eea;
  background: rgba(102, 126, 234, 0.2);
}

.visu-quiz-option.visu-correct {
  border-color: #4CAF50;
  background: rgba(76, 175, 80, 0.3);
}

.visu-quiz-option.visu-incorrect {
  border-color: #f44336;
  background: rgba(244, 67, 54, 0.2);
}

.visu-option-letter {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: #444;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  flex-shrink: 0;
}

.visu-quiz-option.visu-selected .visu-option-letter {
  background: #667eea;
}

.visu-quiz-option.visu-correct .visu-option-letter {
  background: #4CAF50;
}

.visu-quiz-option.visu-incorrect .visu-option-letter {
  background: #f44336;
}

.visu-quiz-explanation {
  background: rgba(102, 126, 234, 0.1);
  border: 2px solid #667eea;
  border-radius: 12px;
  padding: 12px;
  margin-bottom: 16px;
  display: none;
  font-size: 14px;
}

.visu-quiz-explanation.visu-visible {
  display: block;
}

.visu-quiz-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-top: 16px;
}

.visu-quiz-btn {
  
  padding: 10px 20px;
  font-size: 14px;
}

.visu-visualizer.visu-quiz-active .visu-btn:not(.visu-quiz-btn),
.visu-visualizer.visu-quiz-active .visu-speed-btn,
.visu-visualizer.visu-quiz-active .visu-mode-label {  /* ✅ Добавили .mode-label */
    opacity: 0.3;
    pointer-events: none;
}

/* Плейсхолдер для пустых секций */
.visu-panel-empty {
  color: #666;
  font-size: 12px;
  padding: 6px 0;
}

/* === RECURSION TREE (mini boxes, readable text) === */
.visu-recursion-tree {
  padding: 10px;
  background: #0d0d0d;
  border-radius: 8px;
  overflow-x: auto;
}
.visu-recursion-tree .visu-tree-title {
font-size: 13px;
  color: #888;
  text-transform: uppercase;
  margin-bottom: 8px;
 
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 6px;
}
.visu-recursion-tree .visu-tree-container {
  display: flex;
  justify-content: center;
}

/* Узлы */
.visu-recursion-tree .visu-tree-node {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 6px;
}

/* Маленькие коробки, но нормальные шрифты */
.visu-recursion-tree .visu-node-content {
  position: relative; z-index: 2;
  background: linear-gradient(135deg, #2d2d2d, #1d1d1d);
  border: 1px solid #333;
  border-radius: 6px;
  padding: 4px 6px;
  min-width: 66px;
  text-align: center;
  transition: transform .15s ease, border-color .15s ease, box-shadow .15s ease;
  white-space: nowrap;
}
.visu-recursion-tree .visu-node-content:hover { transform: scale(1.02); border-color: #667eea; }

.visu-recursion-tree .visu-node-content.visu-pending   { opacity: .65; }
.visu-recursion-tree .visu-node-content.visu-active    { background: linear-gradient(135deg, #ff9800, #e67c00); border-color: #ff9800; box-shadow: 0 3px 10px rgba(255,152,0,.25); }
.visu-recursion-tree .visu-node-content.visu-completed { background: linear-gradient(135deg, #667eea, #5a6fd0); border-color: #667eea; }

/* Подписи читаемые */
.visu-recursion-tree .visu-node-label  { font-size: 12px;  color: #fff; }
.visu-recursion-tree .visu-node-value  { font-size: 11px; color: rgba(255,255,255,.75); margin-top: 2px; }
.visu-recursion-tree .visu-node-result { font-size: 12px; color: #fff; margin-top: 2px; /*! font-weight: 700; */ }

/* Дети и линии (тонкие) */
.visu-recursion-tree .visu-tree-children {
  position: relative;
  display: flex; justify-content: center;
  gap: 12px;
  margin-top: 12px;
  padding-top: 8px;
}
.visu-recursion-tree .visu-tree-children::before {
  content: '';
  position: absolute; top: 0; left: 8px; right: 8px;
  height: 1px; background: #333;
}
.visu-recursion-tree .visu-tree-children::after {
  content: '';
  position: absolute; top: -10px; left: 50%;
  transform: translateX(-50%);
  width: 1px; height: 10px; background: #333;
}
.visu-recursion-tree .visu-tree-children > .visu-tree-node::before {
  content: '';
  position: absolute; top: -10px; left: 50%;
  transform: translateX(-50%);
  width: 1px; height: 10px; background: #333;
}

/* Легенда (мини) */
.visu-recursion-tree .visu-tree-legend {
  margin-top: 8px;
  display: flex; gap: 12px; justify-content: center; flex-wrap: wrap;
  font-size: 10.5px; color: #888;
}
.visu-recursion-tree .visu-legend-item { display: flex; align-items: center; gap: 6px; }
.visu-recursion-tree .visu-swatch { width: 11px; height: 11px; border-radius: 3px; border: 1px solid #333; }
.visu-recursion-tree .visu-swatch.visu-pending   { background: #2d2d2d; opacity: .65; }
.visu-recursion-tree .visu-swatch.visu-active    { background: linear-gradient(135deg, #ff9800, #e67c00); border-color: #ff9800; }
.visu-recursion-tree .visu-swatch.visu-completed { background: linear-gradient(135deg, #667eea, #5a6fd0); border-color: #667eea; }

/* Подсказка */
.visu-recursion-tree .visu-tree-hint {
  margin-top: 6px;
  padding: 8px;
  background: rgba(102,126,234,.08);
  border-left: 2px solid #667eea;
  border-radius: 6px;
  color: #bbb; font-size: 10.5px; line-height: 1.45;
}
.visu-recursion-tree .visu-tree-hint ul { margin: 4px 0 0 14px; padding: 0; }
.visu-recursion-tree .visu-tree-hint li { margin: 2px 0; }

/* Статистика — мини */
.visu-recursion-tree .visu-tree-stats {
  margin-top: 10px; padding-top: 8px; border-top: 1px solid #333;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px;
}
.visu-recursion-tree .visu-tree-stat { text-align: center; }
.visu-recursion-tree .visu-tree-stat-value { font-size: 12px; font-weight: 600; color: #667eea; }
.visu-recursion-tree .visu-tree-stat-label { font-size: 9px; color: #666; text-transform: uppercase; margin-top: 2px; }

@media (max-width: 560px) {
  .visu-recursion-tree .visu-tree-children { gap: 8px; }
  .visu-recursion-tree .visu-node-content { min-width: 60px; padding: 3px 5px; }
}


/* DOM визуализация */
.visu-dom-viz { background: #0d0d0d; border-radius: 8px; padding: 16px; }







@media (max-width: 768px) {
  
  
  
  #visu-history-list {
  overflow-y: auto;
  height: 255px;
}
  
     

.visu-visualizer {
  max-width: 1600px;
  margin: 20px auto;
  background: #0f0f0f;
  border-radius: 8px; 
  overflow: hidden;
  display: flex;
  flex-direction: column;
   color: #e0e0e0;
}

.visu-desc ,
.visu-header {
  background: linear-gradient(to right, #1a1a1a, #2d2d2d);
  padding: 16px 20px;
  border-bottom: 1px solid #333;
  display: flex;
  align-items: center;
  gap: 16px;
}

 
.visu-title {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 18px;
  font-weight: 600;
}

.visu-title-icon {
  font-size: 24px;
}

.visu-language-badge {
  background: linear-gradient(135deg, #667eea, #764ba2);
  padding: 4px 12px;
  border-radius: 16px;
  font-size: 12px;
  text-transform: uppercase;
}

.visu-controls {
  background: #1a1a1a;
  padding: 12px 20px;
  border-bottom: 1px solid #333;
}

.visu-controls-row {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.visu-controls-row:last-child {
  margin-bottom: 0;
}

.visu-btn-group {
  display: flex;
  gap: 8px;
}

.visu-btn {
  padding: 10px 16px;
  border-radius: 8px;
  border: 1px solid #444;
  background: linear-gradient(135deg, #2d2d2d, #252525);
  color: white;
  cursor: pointer;
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s;
}

.visu-btn:hover:not(:disabled) {
  background: linear-gradient(135deg, #3d3d3d, #353535);
  transform: translateY(-1px);
}

.visu-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none !important;
}

.visu-btn.visu-primary {
  background: linear-gradient(135deg, #4CAF50, #45a049);
}

.visu-btn.visu-warning {
  background: linear-gradient(135deg, #ff9800, #f57c00);
}

.visu-btn.visu-danger {
  background: linear-gradient(135deg, #f44336, #da190b);
}

.visu-progress-container {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 200px;
}

.visu-progress-bar {
  flex: 1;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  overflow: hidden;
}

.visu-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #667eea, #764ba2);
  width: 0%;
  transition: width 0.3s;
}

.visu-progress-fill.visu-completed {
  background: linear-gradient(90deg, #4CAF50, #45a049);
}

.visu-step-counter {
  color: #888;
  font-family: monospace;
}

.visu-step-counter .visu-current {
  color: #667eea;
  font-weight: 600;
}

.visu-speed-controls,
.visu-mode-selector {
  display: flex;
  align-items: center;
  gap: 8px;
}

.visu-speed-label,
.visu-mode-label-title {
  color: #888;
  font-size: 13px;
}

.visu-speed-btn,
.visu-mode-label {
  padding: 8px 14px;
  border-radius: 6px;
  border: 1px solid #444;
  cursor: pointer;
  font-size: 13px;
  transition: all 0.2s;
  background: transparent;
}

.visu-speed-btn {
  font-size: 18px;
}

.visu-mode-radio {
  display: none;
}

.visu-speed-btn:hover,
.visu-mode-label:hover {
  background: rgba(255, 255, 255, 0.1);
}

.visu-speed-btn.visu-active,
.visu-mode-radio:checked+.visu-mode-label {
  background: #667eea;
  border-color: #667eea;
  color: white;
}

.visu-main {
  display: flex;
 
height: calc(100vh -  100px )
  
}

.visu-history {
  width: 100%; 
  background: #1a1a1a;
  border-right: 1px solid #333;
  /*! overflow-y: auto; */
  flex-shrink: 0;
  position: relative;
  /*! height: 100%; */
}


#visu-history-list{
   overflow-y: auto; 
 
   max-height: 140px;
}

.visu-code-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: #0d0d0d;
  position: relative;
  width: calc(100% - 850px);
}

.visu-right-panel {
   min-width: 370px;  
 max-width: 470px;
  background: #0f0f0f;
  border-left: 1px solid #333;
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.visu-status-bar {
  background: #1a1a1a;
  border-top: 1px solid #333;
  padding: 8px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: #888;
}

.visu-status-message {
  display: flex;
  align-items: center;
  gap: 8px;
}

.visu-status-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #666;
}

.visu-status-indicator.visu-active {
  background: #4CAF50;
  animation: pulseStatus 2s infinite;
}

.visu-status-indicator.visu-paused {
  background: #ff9800;
}

@keyframes pulseStatus {
  50% {
    opacity: 0.5;
  }
}

.visu-history-header {
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid #333;
  font-size: 12px;
  color: #888;
  text-transform: uppercase;
}

.visu-history-item {
  padding: 6px;
  margin: 4px 8px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 8px;
  cursor: pointer;
  border-left: 3px solid transparent;
  transition: all 0.2s;
  display: flex;
  gap: 10px;
  align-items: center;
}

.visu-history-item:hover {
  background: rgba(255, 255, 255, 0.06);
  transform: translateX(4px);
}

.visu-history-item.visu-current {
  background: rgba(76, 175, 80, 0.1);
  border-left-color: #4CAF50;
}

.visu-history-step-number {
  font-size: 11px;
  color: #666;
  /*! margin-bottom: 4px; */
}

.visu-history-step-action {
  font-size: 13px;
  font-weight: 500;
  color: #fff;
} 

.visu-code-container {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  /*! max-height: 300px; */
  /*! flex: 1; */
}

.visu-code-line {
  display: flex;
  min-height: 1.5em;
  line-height: 1.6;
  font-family: 'Consolas', monospace;
  font-size: 14px;
  transition: all 0.3s;
}

.visu-code-line.visu-active {
  background: rgba(76, 175, 80, 0.15);
  box-shadow: inset 3px 0 0 #4CAF50;
}

.visu-line-number {
  width: 50px;
  text-align: right;
  padding-right: 16px;
  color: #666;
  user-select: none;
  cursor: pointer;
  position: relative;
}

.visu-line-number.visu-has-breakpoint::before {
  content: '●';
  position: absolute;
  left: 8px;
  color: #f44336;
}

.visu-line-content {
  flex: 1;
  padding-left: 12px;
  color: #d4d4d4;
  /*! white-space: pre; */
}

.visu-token-keyword {
  color: #569cd6;
  font-weight: 500;
}

.visu-token-string {
  color: #ce9178;
}

.visu-token-number {
  color: #b5cea8;
}

.visu-token-function {
  color: #dcdcaa;
}

.visu-token-variable {
  color: #9cdcfe;
}

.visu-token-comment {
  color: #6a9955;
  font-style: italic;
}

.visu-explanation { background: #1a1a1a; border-top: 1px solid #333; padding: 0;  overflow: hidden; transition: all 0.3s; /*! position: sticky; */bottom: 0;}

.visu-explanation.visu-hidden {
  max-height: 0 !important;
  padding: 0 !important;
  border: 0 !important;
  overflow: hidden !important;
}

.visu-explanation-header {
  padding: 12px 16px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.visu-explanation-title {
  font-size: 13px;
  color: #888;
}

.visu-explanation-content {
  padding: 0 16px 16px;
  color: #ccc;
  font-size: 14px;
  line-height: 1.6;
}

.visu-explanation-content code {
background: #515151;
 
padding: 0 5px;
}


.visu-explanation-action {
  display: inline-block;
  background: linear-gradient(135deg, #667eea, #764ba2);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 8px;
}

.visu-panel-section {
  border-bottom: 1px solid #333;
  padding: 16px;
}

.visu-panel-section:last-child {
  border-bottom: none;
}

.visu-panel-title {
  font-size: 13px;
  color: #888;
  text-transform: uppercase;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.visu-panel-content {
  flex: 1;
  overflow-y: auto;
}

.visu-variable-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid #333;
  /*! border-radius: 8px; */
  padding: 3px 6px;
  margin-bottom: -1px;
  transition: all 0.3s;
}

.visu-variable-item.visu-changed {
  animation: varChange 0.5s;
}

@keyframes varChange {
  50% {
    background: rgba(76, 175, 80, 0.2);
    transform: scale(1.02);
  }
}

.visu-var-header {
  display: inline-flex;
  gap: 8px;
  margin-bottom: 6px;
}

.visu-var-type {
  background: #333;
  color: #888;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 11px;
}

.visu-var-name {
  color: #9cdcfe;
  font-family: monospace;
  font-weight: 500;
}

.visu-var-name:after {
 content:'=';
  padding-left: 5px
}

.visu-var-value {
  color: #ce9178;
  font-family: monospace;
  font-size: 13px;
  padding-left: 5px;
 display: inline-flex
  
 
  
}

 

.visu-array-viz {
  background: #0d0d0d;
  border-radius: 8px;
}

.visu-array-container {
  display: flex;
  gap: 20px;
  align-items: flex-end;
  min-height: 150px;
  padding: 12px;
 
  margin-top: 50px;
}

.visu-array-item {
  min-width: 20px;
  background: linear-gradient(135deg, #2d2d2d, #1d1d1d);
  border: 2px solid #444;
  border-radius: 2px;
  padding: 5px;
  text-align: center;
  transition: all 0.4s;
  position: relative;
}

.visu-array-item.visu-active {
  background: linear-gradient(135deg, #667eea, #5a6fd0);
  border-color: #667eea;
  transform: translateY(-8px);
  box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
}

.visu-array-item.visu-comparing {
  background: linear-gradient(135deg, #ff9800, #e67c00);
  border-color: #ff9800;
  animation: pulseViz 0.6s infinite;
}

.visu-array-item.visu-sorted {
  background: linear-gradient(135deg, #4CAF50, #45a049);
  border-color: #4CAF50;
}

@keyframes pulseViz {
  50% {
    transform: translateY(-4px) scale(1.08);
  }
}

.visu-array-value {
  font-size: 14px;
 
  color: white;
  margin-bottom: 4px;
}

.visu-array-index {
  position: absolute;
  bottom: -20px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 11px;
  color: #666;
}

.visu-array-pointer {
  position: absolute;
  top: -30px;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
}

.visu-pointer-label {
  font-size: 12px;
  color: #667eea;
  font-weight: 600;
  text-transform: lowercase;
}

.visu-array-legend {
  display: flex;
  gap: 16px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid #333;
  font-size: 12px;
}




.visu-legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #888;
}

.visu-legend-color {
  width: 20px;
  height: 12px;
  border-radius: 4px;
}







/* Мини‑легенда и подсказка для массива */
.visu-array-legend-mini {
  margin-top: 15px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  font-size: 10.5px;
  color: #888;
}
.visu-array-legend-mini .visu-legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
}
.visu-array-legend-mini .visu-swatch {
  width: 11px; height: 11px;
  border-radius: 3px;
  border: 1px solid #333;
}
.visu-swatch-active    { background: linear-gradient(135deg, #667eea, #5a6fd0); border-color: #667eea; }
.visu-swatch-comparing { background: linear-gradient(135deg, #ff9800, #e67c00); border-color: #ff9800; }
.visu-swatch-sorted    { background: linear-gradient(135deg, #4CAF50, #45a049); border-color: #4CAF50; }

.visu-array-hint {
  margin-top: 6px;
  padding: 8px;
  background: rgba(102,126,234,.08);
  border-left: 2px solid #667eea;
  border-radius: 6px;
  color: #bbb;
  font-size: 10.5px;
  line-height: 1.45;
}
.visu-array-hint ul { margin: 4px 0 0 14px; padding: 0; }
.visu-array-hint li { margin: 2px 0; }

/* Чтобы несколько указателей (i, j, pivot) над одним столбцом красиво складывались */
.visu-array-pointer {
  display: flex;
  flex-direction: column;
  gap: 2px;
  align-items: center;
}




/* swatch для нейтрального (серого) столбца */
.visu-swatch-neutral {
  background: linear-gradient(135deg, #2d2d2d, #1d1d1d);
  border: 1px solid #444;
  border-radius: 3px;
  width: 11px;
  height: 11px;
}







.visu-console-output {
  background: #0d0d0d;
  border-radius: 8px;
  padding: 12px;
  font-family: monospace;
  font-size: 13px;
}

.visu-console-line {
  display: flex;
  gap: 8px;
  margin: 6px 0;
}

.visu-console-text {
  color: #0f0;
}

.visu-stack-frame-item:hover {
  transform: translateX(-6px) !important;
  box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6) !important;
}

.visu-quiz-container {
  background: linear-gradient(135deg, #1a1a1a, #2d2d2d);
 
  padding: 0;
 display: none;
  /*! opacity: 0; */
 
}

.visu-quiz-container.visu-active {
display: block 
}

.visu-quiz-card {
 
  margin: 0 auto;
  background: rgba(0, 0, 0, 0.3);
 
  padding: 15px;
 
  min-height: 100%;
} 

.visu-quiz-header {
  text-align: center;
  margin-bottom: 20px;
}

.visu-quiz-icon {
  font-size: 38px;
  margin-bottom: 6px;
}

.visu-quiz-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
}

.visu-quiz-question { 
  font-size: 16px;
  color: #ccc;
  line-height: 1.3;
  background: rgba(102, 126, 234, 0.1);
  padding: 12px;
  border-radius: 12px;
  border-left: 4px solid #667eea;
}

.visu-quiz-options {
  display: grid;
  
  gap: 12px;
  margin: 20px 0;
}

.visu-quiz-option {
  background: linear-gradient(135deg, #2d2d2d, #1d1d1d);
  border: 2px solid #444;
  border-radius: 12px;
  padding: 6px;
  cursor: pointer;
  transition: all 0.3s;
  display: flex;
  gap: 16px;
  align-items: center;
  font-size: 15px;
}

.visu-quiz-option:hover {
  border-color: #667eea;
  transform: translateY(-4px);
}

.visu-quiz-option.visu-selected {
  border-color: #667eea;
  background: rgba(102, 126, 234, 0.2);
}

.visu-quiz-option.visu-correct {
  border-color: #4CAF50;
  background: rgba(76, 175, 80, 0.3);
}

.visu-quiz-option.visu-incorrect {
  border-color: #f44336;
  background: rgba(244, 67, 54, 0.2);
}

.visu-option-letter {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: #444;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  flex-shrink: 0;
}

.visu-quiz-option.visu-selected .visu-option-letter {
  background: #667eea;
}

.visu-quiz-option.visu-correct .visu-option-letter {
  background: #4CAF50;
}

.visu-quiz-option.visu-incorrect .visu-option-letter {
  background: #f44336;
}

.visu-quiz-explanation {
  background: rgba(102, 126, 234, 0.1);
  border: 2px solid #667eea;
  border-radius: 12px;
  padding: 12px;
  margin-bottom: 16px;
  display: none;
  font-size: 14px;
}

.visu-quiz-explanation.visu-visible {
  display: block;
}

.visu-quiz-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-top: 16px;
}

.visu-quiz-btn {
  
  padding: 10px 20px;
  font-size: 14px;
}

.visu-visualizer.visu-quiz-active .visu-btn:not(.visu-quiz-btn),
.visu-visualizer.visu-quiz-active .visu-speed-btn,
.visu-visualizer.visu-quiz-active .visu-mode-label {  /* ✅ Добавили .mode-label */
    opacity: 0.3;
    pointer-events: none;
}

/* Плейсхолдер для пустых секций */
.visu-panel-empty {
  color: #666;
  font-size: 12px;
  padding: 6px 0;
}

/* === RECURSION TREE (mini boxes, readable text) === */
.visu-recursion-tree {
  padding: 10px;
  background: #0d0d0d;
  border-radius: 8px;
  overflow-x: auto;
}
.visu-recursion-tree .visu-tree-title {
font-size: 13px;
  color: #888;
  text-transform: uppercase;
  margin-bottom: 8px;
 
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 6px;
}
.visu-recursion-tree .visu-tree-container {
  display: flex;
  justify-content: center;
}

/* Узлы */
.visu-recursion-tree .visu-tree-node {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 6px;
}

/* Маленькие коробки, но нормальные шрифты */
.visu-recursion-tree .visu-node-content {
  position: relative; z-index: 2;
  background: linear-gradient(135deg, #2d2d2d, #1d1d1d);
  border: 1px solid #333;
  border-radius: 6px;
  padding: 4px 6px;
  min-width: 66px;
  text-align: center;
  transition: transform .15s ease, border-color .15s ease, box-shadow .15s ease;
  white-space: nowrap;
}
.visu-recursion-tree .visu-node-content:hover { transform: scale(1.02); border-color: #667eea; }

.visu-recursion-tree .visu-node-content.visu-pending   { opacity: .65; }
.visu-recursion-tree .visu-node-content.visu-active    { background: linear-gradient(135deg, #ff9800, #e67c00); border-color: #ff9800; box-shadow: 0 3px 10px rgba(255,152,0,.25); }
.visu-recursion-tree .visu-node-content.visu-completed { background: linear-gradient(135deg, #667eea, #5a6fd0); border-color: #667eea; }

/* Подписи читаемые */
.visu-recursion-tree .visu-node-label  { font-size: 12px;  color: #fff; }
.visu-recursion-tree .visu-node-value  { font-size: 11px; color: rgba(255,255,255,.75); margin-top: 2px; }
.visu-recursion-tree .visu-node-result { font-size: 12px; color: #fff; margin-top: 2px; /*! font-weight: 700; */ }

/* Дети и линии (тонкие) */
.visu-recursion-tree .visu-tree-children {
  position: relative;
  display: flex; justify-content: center;
  gap: 12px;
  margin-top: 12px;
  padding-top: 8px;
}
.visu-recursion-tree .visu-tree-children::before {
  content: '';
  position: absolute; top: 0; left: 8px; right: 8px;
  height: 1px; background: #333;
}
.visu-recursion-tree .visu-tree-children::after {
  content: '';
  position: absolute; top: -10px; left: 50%;
  transform: translateX(-50%);
  width: 1px; height: 10px; background: #333;
}
.visu-recursion-tree .visu-tree-children > .visu-tree-node::before {
  content: '';
  position: absolute; top: -10px; left: 50%;
  transform: translateX(-50%);
  width: 1px; height: 10px; background: #333;
}

/* Легенда (мини) */
.visu-recursion-tree .visu-tree-legend {
  margin-top: 8px;
  display: flex; gap: 12px; justify-content: center; flex-wrap: wrap;
  font-size: 10.5px; color: #888;
}
.visu-recursion-tree .visu-legend-item { display: flex; align-items: center; gap: 6px; }
.visu-recursion-tree .visu-swatch { width: 11px; height: 11px; border-radius: 3px; border: 1px solid #333; }
.visu-recursion-tree .visu-swatch.visu-pending   { background: #2d2d2d; opacity: .65; }
.visu-recursion-tree .visu-swatch.visu-active    { background: linear-gradient(135deg, #ff9800, #e67c00); border-color: #ff9800; }
.visu-recursion-tree .visu-swatch.visu-completed { background: linear-gradient(135deg, #667eea, #5a6fd0); border-color: #667eea; }

/* Подсказка */
.visu-recursion-tree .visu-tree-hint {
  margin-top: 6px;
  padding: 8px;
  background: rgba(102,126,234,.08);
  border-left: 2px solid #667eea;
  border-radius: 6px;
  color: #bbb; font-size: 10.5px; line-height: 1.45;
}
.visu-recursion-tree .visu-tree-hint ul { margin: 4px 0 0 14px; padding: 0; }
.visu-recursion-tree .visu-tree-hint li { margin: 2px 0; }

/* Статистика — мини */
.visu-recursion-tree .visu-tree-stats {
  margin-top: 10px; padding-top: 8px; border-top: 1px solid #333;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px;
}
.visu-recursion-tree .visu-tree-stat { text-align: center; }
.visu-recursion-tree .visu-tree-stat-value { font-size: 12px; font-weight: 600; color: #667eea; }
.visu-recursion-tree .visu-tree-stat-label { font-size: 9px; color: #666; text-transform: uppercase; margin-top: 2px; }

@media (max-width: 560px) {
  .visu-recursion-tree .visu-tree-children { gap: 8px; }
  .visu-recursion-tree .visu-node-content { min-width: 60px; padding: 3px 5px; }
}


/* DOM визуализация */
.visu-dom-viz { background: #0d0d0d; border-radius: 8px; padding: 16px; }







@media (max-width: 768px) {
  
  
  
  #visu-history-list {
  overflow-y: auto;
  height: 255px;
}
  
  
  .visu-code-area {
 
  width:  100%  ;
}
  
  
  .visu-main {
    flex-direction: column;
    height: auto;
    max-height: none;
  }

  .visu-history,
  .visu-right-panel {
    width: 100%;
    border: none;
    border-bottom: 1px solid #333;
    max-height: 300px;
    position: relative;
  }

  .visu-controls-row {
    flex-direction: column;
    gap: 12px;
    align-items: stretch;
  }

  .visu-quiz-options {
    grid-template-columns: 1fr;
  }
}

 
  .visu-code-area {
 
  width:  100%  ;
}
  
  
  .visu-main {
    flex-direction: column;
    height: auto;
    max-height: none;
  }

  .visu-history,
  .visu-right-panel {
    width: 100%;
    border: none;
    border-bottom: 1px solid #333;
    max-height: 300px;
    position: relative;
  }

  .visu-controls-row {
    flex-direction: column;
    gap: 12px;
    align-items: stretch;
  }

  .visu-quiz-options {
    grid-template-columns: 1fr;
  }
}