/* ==================== SCOPED TO ANIMATION CONTAINER ONLY ==================== */
/* All styles are scoped to #knnAnimationContainer to avoid affecting experiment steps */

#knnAnimationContainer * {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

#knnAnimationContainer {
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  width: 100vw !important;
  height: 100vh !important;
  font-family: 'Consolas', 'Monaco', 'SF Mono', monospace;
  background: #1a1d21;
  background: radial-gradient(circle at center, #1e2520, #1a1d21);
  color: #e0e0e0;
  line-height: 1.6;
  z-index: 10000 !important;
  display: none; /* Hidden by default */
  flex-direction: column;
  overflow-x: hidden;
  overflow-y: auto;
}

#knnAnimationContainer.active {
  display: flex;
}

/* ==================== LOADING SCREEN ==================== */
#knnAnimationContainer .loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: radial-gradient(circle at center, #1e2520, #1a1d21);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
}

#knnAnimationContainer .loading-screen.hidden {
  display: none;
}

#knnAnimationContainer .loading-content {
  text-align: center;
}

#knnAnimationContainer .progress-bar-container {
  width: 300px;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  margin: 20px auto 10px;
  overflow: hidden;
}

#knnAnimationContainer .progress-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #4CAF50, #81C784);
  transition: width 0.3s ease;
}

#knnAnimationContainer .loading-content h2 {
  font-size: 1.5em;
  margin-bottom: 10px;
  background: linear-gradient(90deg, #4CAF50, #81C784);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

#knnAnimationContainer .loading-content p {
  color: #9e9e9e;
  font-size: 0.9em;
}

#knnAnimationContainer .loading-percent {
  margin-top: 5px;
  font-size: 0.8em;
  color: #666;
}

/* ==================== BACK BUTTON ==================== */
#knnAnimationContainer .back-btn {
  position: absolute;
  left: 20px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(76, 175, 80, 0.1);
  border: 1px solid rgba(76, 175, 80, 0.3);
  border-radius: 8px;
  color: #81C784;
  font-size: 0.85em;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
}

#knnAnimationContainer .back-btn:hover {
  background: rgba(76, 175, 80, 0.2);
  border-color: rgba(76, 175, 80, 0.5);
  transform: translateY(-50%) translateX(-2px);
}

#knnAnimationContainer .back-btn svg {
  width: 16px;
  height: 16px;
}

/* ==================== CHOICE SCREEN ==================== */
#knnAnimationContainer .choice-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(26, 29, 33, 0.95);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  backdrop-filter: blur(10px);
}

#knnAnimationContainer .choice-content {
  text-align: center;
  max-width: 600px;
  padding: 40px;
  background: rgba(30, 37, 32, 0.9);
  border-radius: 20px;
  border: 1px solid rgba(18, 63, 19, 0.3);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}

#knnAnimationContainer .choice-content h1 {
  font-size: 2em;
  margin-bottom: 5px;
  background: linear-gradient(135deg, #4d6639, #81C784);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

#knnAnimationContainer .choice-content .subtitle {
  color: #999;
  margin-bottom: 30px;
}

#knnAnimationContainer .choice-buttons {
  display: flex;
  gap: 20px;
  justify-content: center;
  margin-bottom: 30px;
}

#knnAnimationContainer .choice-btn {
  background: rgba(76, 175, 80, 0.1);
  border: 1px solid rgba(76, 175, 80, 0.3);
  border-radius: 12px;
  padding: 15px 25px;
  cursor: pointer;
  transition: all 0.3s ease;
  text-align: left;
  min-width: 200px;
}

#knnAnimationContainer .choice-btn:hover {
  background: rgba(76, 175, 80, 0.2);
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(76, 175, 80, 0.3);
}

#knnAnimationContainer .choice-btn .btn-title {
  display: block;
  font-size: 1.1em;
  font-weight: 600;
  color: #fff;
  margin-bottom: 5px;
}

#knnAnimationContainer .choice-btn .btn-desc {
  display: block;
  font-size: 0.8em;
  color: #aaa;
}

#knnAnimationContainer .choice-btn.warning .btn-desc {
  color: #ffcc80;
}

#knnAnimationContainer .demo-gif-container {
  margin-top: 20px;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid rgba(76, 175, 80, 0.2);
}

#knnAnimationContainer .demo-canvas {
  width: 100%;
  max-width: 500px;
  border-radius: 8px;
  background: #0d0d0d;
}

/* ==================== LOADING SCREEN ==================== */
#knnAnimationContainer .loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: radial-gradient(circle at center, #1e2520, #1a1d21);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
}

#knnAnimationContainer .loading-content {
  text-align: center;
}

#knnAnimationContainer .progress-bar-container {
  width: 300px;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  margin: 20px auto 10px;
  overflow: hidden;
}

#knnAnimationContainer .progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, #4CAF50, #81C784);
  transition: width 0.3s ease;
}

#knnAnimationContainer .loading-content h2 {
  font-size: 1.5em;
  margin-bottom: 10px;
  background: linear-gradient(90deg, #4CAF50, #81C784);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

#knnAnimationContainer .loading-content p {
  color: #9e9e9e;
  font-size: 0.9em;
}

/* ==================== CONTAINER ==================== */
#knnAnimationContainer .container {
  width: 100vw;
  height: 100vh;
  display: flex;
  flex-direction: column;
  background: radial-gradient(circle at center, #1e2823, #1a1d21);
}

/* ==================== HEADER ==================== */
#knnAnimationContainer header {
  background: linear-gradient(135deg, #1f2823, #242830);
  color: #ffffff;
  padding: 15px 20px;
  flex-shrink: 0;
  border-bottom: 1px solid rgba(76, 175, 80, 0.2);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
  z-index: 20;
  display: flex;
  flex-direction: column; /* Stack to center vertically */
  align-items: center;
  justify-content: center;
  position: relative;
}

#knnAnimationContainer header h1 {
  font-size: 1.5em;
  margin: 0;
  font-weight: 700;
  background: linear-gradient(135deg, #4CAF50, #81C784);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ==================== CONTENT LAYOUT ==================== */
#knnAnimationContainer .content {
  display: flex !important;
  flex: 1 !important;
  overflow-x: hidden !important;
  overflow-y: auto !important;
  position: relative !important;
  width: 100% !important;
  min-width: 0 !important;
  min-height: 0 !important;
}

/* ==================== SIDEBAR ==================== */
#knnAnimationContainer .sidebar {
  width: 380px !important;
  flex-shrink: 0 !important;  /* Prevent sidebar from shrinking */
  background: #111 !important;
  border-right: 1px solid #333 !important;
  padding: 20px !important;
  overflow-y: auto !important;
  display: flex !important;
  flex-direction: column !important;
  gap: 15px !important;
  z-index: 20 !important;
}

#knnAnimationContainer .sidebar-section {
  margin-bottom: 5px;
}

#knnAnimationContainer .control-group {
  margin-bottom: 20px;
}

#knnAnimationContainer .control-group:last-child {
  margin-bottom: 0;
}

#knnAnimationContainer .sidebar h3 {
  color: #81C784;
  font-size: 0.85em;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 15px;
  border-bottom: 1px solid rgba(76, 175, 80, 0.3);
  /* Separation line */
  padding-bottom: 5px;
  padding-left: 0;
}

#knnAnimationContainer .section-subtitle {
  color: #9e9e9e;
  font-size: 0.8em;
  margin-top: -10px;
  margin-bottom: 15px;
  font-family: monospace;
}

#knnAnimationContainer .sidebar-divider {
  border: 0;
  display: block;
  width: 100%;
}

#knnAnimationContainer .sidebar-divider.thick {
  height: 4px !important;
  background: #2e7d32;
  /* Fallback */
  background: linear-gradient(90deg, rgba(76, 175, 80, 0.2), rgba(76, 175, 80, 0.9), rgba(76, 175, 80, 0.2)) !important;
  margin: 25px 0 !important;
  border-radius: 2px;
  box-shadow: 0 0 10px rgba(76, 175, 80, 0.5);
  opacity: 1 !important;
}

#knnAnimationContainer .thick-separator {
  height: 4px;
  background: linear-gradient(90deg, rgba(76, 175, 80, 0.2), rgba(76, 175, 80, 0.9), rgba(76, 175, 80, 0.2));
  margin: 25px 0;
  border-radius: 2px;
  box-shadow: 0 0 10px rgba(76, 175, 80, 0.5);
}

#knnAnimationContainer .auto-pilot-section {
  border: 1px solid rgba(129, 199, 132, 0.3);
  border-radius: 8px;
  padding: 15px;
  background: rgba(129, 199, 132, 0.05);
}

/* ==================== K VALUE BUTTONS ==================== */
#knnAnimationContainer .k-buttons {
  display: flex;
  gap: 10px;
  justify-content: space-between;
}

#knnAnimationContainer .k-btn {
  flex: 1;
  padding: 10px;
  background: linear-gradient(135deg, rgba(76, 175, 80, 0.2), rgba(76, 175, 80, 0.1));
  border: 1px solid rgba(76, 175, 80, 0.3);
  border-radius: 6px;
  color: #3bbfa0;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
  font-size: 0.9em;
}

#knnAnimationContainer .k-btn:hover {
  background: linear-gradient(135deg, rgba(76, 175, 80, 0.3), rgba(76, 175, 80, 0.15));
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(76, 175, 80, 0.3);
}

#knnAnimationContainer .k-btn.active {
  background: linear-gradient(135deg, rgba(76, 175, 80, 0.35), rgba(76, 175, 80, 0.2));
  border-color: #4CAF50;
  color: #4CAF50;
  box-shadow: 0 0 15px rgba(76, 175, 80, 0.4);
}

/* ==================== FEATURE BUTTON ==================== */
/* ==================== FEATURE BUTTON ==================== */
#knnAnimationContainer .feature-btn {
  width: 100%;
  padding: 12px;
  background: rgba(30, 60, 40, 0.6);
  border: 1px solid #4CAF50;
  color: #4CAF50;
  font-weight: 700;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: 0.85em;
  margin-bottom: 5px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
  text-shadow: 0 0 10px rgba(76, 175, 80, 0.4);
}

#knnAnimationContainer .feature-btn:hover {
  background: rgba(76, 175, 80, 0.2);
  box-shadow: 0 0 15px rgba(76, 175, 80, 0.3);
  transform: translateY(-1px);
}

/* ==================== SPEED CONTROL ==================== */
#knnAnimationContainer .speed-control {
  margin-top: 15px;
  padding-top: 15px;
  border-top: 1px solid rgba(76, 175, 80, 0.15);
}

#knnAnimationContainer .run-btn {
  width: 100%;
  padding: 12px;
  background: #388e3c;
  /* Darker green */
  color: white;
  border: none;
  border-radius: 6px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.3s ease;
  font-family: inherit;
  font-size: 0.95em;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

#knnAnimationContainer .run-btn:hover {
  background: #43a047;
  /* Slightly lighter on hover */
  transform: translateY(-1px);
  box-shadow: 0 6px 10px rgba(0, 0, 0, 0.4);
}

#knnAnimationContainer .run-btn.active {
  background: linear-gradient(135deg, #2e7d32, #1b5e20);
  border: 1px solid #81C784;
}

/* ==================== SLIDERS ==================== */
#knnAnimationContainer .slider-container {
  margin-bottom: 15px;
  position: relative;
}

#knnAnimationContainer .slider-label {
  display: flex;
  justify-content: space-between;
  margin-bottom: 5px;
  font-weight: 500;
  color: #bdbdbd;
  font-size: 0.85em;
}

#knnAnimationContainer .slider-value {
  color: #4CAF50;
  font-weight: 700;
  font-family: 'Consolas', 'Monaco', monospace;
}

#knnAnimationContainer .slider-with-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

#knnAnimationContainer .slider-control-btn {
  background: rgba(76, 175, 80, 0.15);
  border: 1px solid rgba(76, 175, 80, 0.3);
  border-radius: 4px;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: #d4d45a;
  font-size: 0.7em;
  transition: all 0.2s ease;
  flex-shrink: 0;
}

#knnAnimationContainer .slider-control-btn:hover {
  background: rgba(76, 175, 80, 0.25);
  border-color: rgba(76, 175, 80, 0.5);
  transform: scale(1.05);
}

#knnAnimationContainer input[type="range"] {
  flex: 1;
  height: 5px;
  border-radius: 3px;
  background: #424242;
  outline: none;
  appearance: none;
  -webkit-appearance: none;
}

#knnAnimationContainer input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #4CAF50;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

#knnAnimationContainer input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 0 12px rgba(76, 175, 80, 0.6);
}

/* ==================== METRICS PANEL ==================== */
#knnAnimationContainer .metrics-panel {
  background: rgba(76, 175, 80, 0.05);
  padding: 10px;
  border-radius: 6px;
  border: 1px solid rgba(76, 175, 80, 0.2);
}

#knnAnimationContainer .metric-item {
  display: flex;
  justify-content: space-between;
  padding: 8px 10px;
  align-items: center;
}

#knnAnimationContainer .metric-divider {
  border: 0;
  height: 1px;
  background: rgba(76, 175, 80, 0.1);
  margin: 0;
  width: 100%;
}

#knnAnimationContainer .metric-item:last-child {
  border-bottom: none;
}

#knnAnimationContainer .metric-name {
  color: #b0bec5;
  font-size: 0.85em;
}

#knnAnimationContainer .metric-value {
  font-weight: 700;
  color: #a2cf6e;
  /* Duller, softer green */
  font-family: 'Consolas', monospace;
}

/* ==================== DATASET INFO ==================== */
#knnAnimationContainer .dataset-info {
  font-size: 0.82em;
  color: #9e9e9e;
  line-height: 1.6;
}

#knnAnimationContainer .dataset-info p {
  margin-bottom: 6px;
}

#knnAnimationContainer .dataset-info strong {
  color: #538856;
}

/* ==================== MAIN CONTENT ==================== */
#knnAnimationContainer .main-content {
  flex: 1 !important;
  min-width: 0 !important;
  width: 100% !important;
  position: relative !important;
  background: radial-gradient(circle at center, #1a1f1d, #15171a) !important;
  overflow-x: hidden !important;
  overflow-y: auto !important;
  padding: 20px !important;
  min-height: 0 !important;
}

#knnAnimationContainer .visualization-grid {
  display: grid !important;
  grid-template-columns: 1.5fr 1fr !important;
  grid-template-rows: 1fr 1fr !important;
  gap: 20px !important;
  width: 100% !important;
  height: auto !important;
  min-height: 100% !important;
}

#knnAnimationContainer .viz-panel {
  background: rgba(30, 35, 33, 0.6);
  border: 1px solid rgba(76, 175, 80, 0.2);
  border-radius: 12px;
  padding: 15px;
  display: flex;
  flex-direction: column;
  overflow: visible;
  backdrop-filter: blur(8px);
}

#knnAnimationContainer .viz-panel.large {
  grid-row: span 2;
}

#knnAnimationContainer .panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(76, 175, 80, 0.15);
  position: relative;
  z-index: 100;
}

#knnAnimationContainer .panel-header span {
  color: #81C784;
  font-size: 0.9em;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
}

#knnAnimationContainer .panel-controls {
  display: flex;
  align-items: center;
  gap: 10px;
}

#knnAnimationContainer .zoom-btn {
  background: rgba(76, 175, 80, 0.15);
  border: 1px solid rgba(76, 175, 80, 0.3);
  border-radius: 4px;
  padding: 4px 8px;
  cursor: pointer;
  color: #81C784;
  font-size: 1em;
  transition: all 0.2s ease;
}

#knnAnimationContainer .zoom-btn:hover {
  background: rgba(76, 175, 80, 0.25);
  transform: scale(1.1);
}

#knnAnimationContainer .canvas-wrapper {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.2);
  cursor: zoom-in;
  position: relative;
  z-index: 1;
}

#knnAnimationContainer .viz-canvas {
  max-width: 100%;
  max-height: 100%;
  border-radius: 4px;
}

/* ==================== BLUR TOGGLES ==================== */
#knnAnimationContainer .blur-toggles {
  display: flex;
  gap: 6px;
}

#knnAnimationContainer .toggle-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 4px 8px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 4px;
  color: #888;
  font-size: 0.75em;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
}

#knnAnimationContainer .toggle-btn:hover {
  background: rgba(255, 255, 255, 0.1);
}

#knnAnimationContainer .toggle-btn.active {
  background: rgba(76, 175, 80, 0.15);
  border-color: rgba(76, 175, 80, 0.4);
  color: #e0e0e0;
}

#knnAnimationContainer .toggle-btn.small {
  padding: 3px 6px;
  font-size: 0.7em;
}

#knnAnimationContainer .toggle-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

#knnAnimationContainer .toggle-dot.train {
  background: transparent;
  /* Removed blue fill */
  border: 2px solid #888;
  /* Gray border for visibility */
}

#knnAnimationContainer .toggle-dot.test {
  background: transparent;
  /* Removed blue fill */
  border: 2px solid #fff;
  /* White border */
}

/* ==================== FEATURE PAIRS WINDOW ==================== */
#knnAnimationContainer .feature-window {
  position: fixed;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 80vw;
  max-width: 1400px;
  height: 90vh;
  min-width: 700px;
  min-height: 500px;
  background: radial-gradient(circle at center, #1e2823, #1a1d21);
  /* Matched to main screen */
  border: 1px solid rgba(76, 175, 80, 0.3);
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.7);
  z-index: 1000;
  display: flex;
  flex-direction: column;
}

#knnAnimationContainer .feature-window.minimized {
  height: 42px !important;
}

#knnAnimationContainer .feature-window-header {
  background: linear-gradient(135deg, rgba(76, 175, 80, 0.15), rgba(76, 175, 80, 0.05));
  padding: 12px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(76, 175, 80, 0.2);
  cursor: move;
  user-select: none;
  flex-shrink: 0;
}

#knnAnimationContainer .window-title {
  color: #7fd9d6;
  font-weight: 600;
  font-size: 0.95em;
  text-transform: uppercase;
  letter-spacing: 1px;
}

#knnAnimationContainer .window-controls {
  display: flex;
  gap: 8px;
  align-items: center;
}

#knnAnimationContainer .header-toggles {
  margin-right: 15px;
}

#knnAnimationContainer .window-btn {
  width: 24px;
  height: 24px;
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.05);
  color: #e0e0e0;
  font-size: 1.2em;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

#knnAnimationContainer .window-btn:hover {
  background: rgba(255, 255, 255, 0.1);
}

#knnAnimationContainer .window-btn.minimize:hover {
  background: rgba(255, 193, 7, 0.2);
  border-color: rgba(255, 193, 7, 0.5);
}

#knnAnimationContainer .window-btn.close:hover {
  background: rgba(239, 83, 80, 0.2);
  border-color: rgba(239, 83, 80, 0.5);
}

#knnAnimationContainer .feature-window-content {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
}

#knnAnimationContainer .feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

#knnAnimationContainer .feature-card {
  background: rgba(30, 35, 33, 0.6);
  border: 1px solid rgba(43, 185, 207, 0.2);
  border-radius: 10px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  cursor: zoom-in;
  transition: all 0.2s ease;
}

#knnAnimationContainer .feature-card:hover {
  border-color: rgba(76, 175, 80, 0.4);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(76, 175, 80, 0.2);
}

#knnAnimationContainer .feature-card h4 {
  color: #b0bec5;
  font-size: 0.85em;
  margin-bottom: 8px;
  text-align: center;
}

#knnAnimationContainer .feature-canvas {
  width: 100%;
  height: auto;
  border-radius: 6px;
}

#knnAnimationContainer .feature-canvas.clickable {
  cursor: crosshair;
}

/* ==================== SCROLLBAR ==================== */
#knnAnimationContainer ::-webkit-scrollbar {
  width: 8px;
}

#knnAnimationContainer ::-webkit-scrollbar-track {
  background: #1a1d21;
}

#knnAnimationContainer ::-webkit-scrollbar-thumb {
  background: rgba(76, 175, 80, 0.3);
  border-radius: 4px;
}

#knnAnimationContainer ::-webkit-scrollbar-thumb:hover {
  background: rgba(76, 175, 80, 0.5);
}

/* ==================== ZOOM MODAL ==================== */
#knnAnimationContainer .zoom-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.01);
  /* More transparent as requested */
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  cursor: zoom-out;
  backdrop-filter: blur(5px);
  /* Adding blur for nicer effect */
}

#knnAnimationContainer .zoom-content {
  position: relative;
  max-width: 95vw;
  max-height: 95vh;
  cursor: default;
}

#knnAnimationContainer .zoom-close {
  position: absolute;
  top: -40px;
  right: 0;
  background: rgba(239, 83, 80, 0.8);
  border: none;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  font-size: 1.5em;
  color: white;
  cursor: pointer;
  transition: all 0.2s ease;
}

#knnAnimationContainer .zoom-close:hover {
  background: #ef5350;
  transform: rotate(90deg);
}

#knnAnimationContainer .zoom-canvas {
  max-width: 90vw;
  max-height: 85vh;
  border-radius: 8px;
}

#knnAnimationContainer .zoom-canvas.clickable {
  cursor: crosshair;
}

#knnAnimationContainer .zoom-hint {
  position: absolute;
  bottom: -35px;
  left: 50%;
  transform: translateX(-50%);
  color: #888;
  font-size: 0.85em;
  white-space: nowrap;
  font-style: italic;
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 1400px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 900px) {
  .feature-grid {
    grid-template-columns: 1fr;
  }

  .visualization-grid {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
  }

  .viz-panel.large {
    grid-row: span 1;
  }
}

/* ==================== FEATURE CARD HEADER ==================== */
#knnAnimationContainer .feature-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

#knnAnimationContainer .feature-card h4 {
  margin-bottom: 0;
  text-align: left;
}

#knnAnimationContainer .card-zoom-btn {
  background: rgba(76, 175, 80, 0.15);
  border: 1px solid rgba(76, 175, 80, 0.3);
  border-radius: 4px;
  padding: 2px 6px;
  cursor: pointer;
  color: #81C784;
  font-size: 0.9em;
  transition: all 0.2s ease;
}

#knnAnimationContainer .card-zoom-btn:hover {
  background: rgba(76, 175, 80, 0.25);
  transform: scale(1.1);
}

#knnAnimationContainer .feature-card {
  cursor: default;
  /* No longer triggers zoom on body click */
}

/* ==================== LEGEND PANEL ==================== */
#knnAnimationContainer .legend-panel {
  background: rgba(13, 13, 13, 0.9);
  border: 1px solid rgba(76, 175, 80, 0.2);
  border-radius: 8px;
  padding: 10px 12px;
  margin-top: 10px;
  flex-shrink: 0;
}

#knnAnimationContainer .legend-title {
  color: #81C784;
  font-size: 0.75em;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
}

#knnAnimationContainer .legend-items {
  display: flex;
  gap: 15px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

#knnAnimationContainer .legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

#knnAnimationContainer .legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

#knnAnimationContainer .legend-dot.train {
  border: 2px solid #000;
}

#knnAnimationContainer .legend-dot.test {
  border: 2px solid #fff;
}

#knnAnimationContainer .legend-dot.marker-train {
  background-color: transparent;
  border: 2px solid #888;
}

#knnAnimationContainer .legend-dot.marker-test-correct {
  background-color: transparent;
  border: 2.5px solid #fff;
}

#knnAnimationContainer .legend-dot.marker-test-wrong {
  background-color: transparent;
  border: 1.5px solid #ff6b6b;
}

#knnAnimationContainer .legend-name {
  color: #e0e0e0;
  font-size: 0.8em;
}

#knnAnimationContainer .legend-marker-types {
  display: flex;
  gap: 15px;
  padding-top: 6px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

#knnAnimationContainer .marker-type {
  display: flex;
  align-items: center;
  gap: 5px;
}

#knnAnimationContainer .marker-label {
  color: #888;
  font-size: 0.7em;
}

#knnAnimationContainer .legend-hint {
  margin-top: 8px;
  padding-top: 6px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: #666;
  font-size: 0.7em;
  font-style: italic;
}

/* ==================== CANVAS WITH LEGEND ==================== */
#knnAnimationContainer .canvas-with-legend {
  display: flex;
  flex-direction: column;
  width: 100%;
  height: 100%;
}

#knnAnimationContainer .canvas-with-legend .viz-canvas {
  flex: 1;
  min-height: 0;
}

#knnAnimationContainer .viz-canvas.clickable {
  cursor: crosshair;
}

#knnAnimationContainer .canvas-wrapper {
  cursor: default;
  /* No longer zoom cursor by default */
}

/* ==================== FEATURE LEGEND ==================== */
#knnAnimationContainer .feature-legend {
  background: rgba(13, 13, 13, 0.8);
  border: 1px solid rgba(76, 175, 80, 0.2);
  border-radius: 8px;
  padding: 12px 15px;
  margin-bottom: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 15px;
}

#knnAnimationContainer .feature-legend-classes {
  display: flex;
  gap: 20px;
}

#knnAnimationContainer .feature-legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  color: #e0e0e0;
  font-size: 0.85em;
}

#knnAnimationContainer .feature-legend-markers {
  display: flex;
  gap: 15px;
}

#knnAnimationContainer .marker-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

#knnAnimationContainer .marker-info {
  color: #888;
  font-size: 0.75em;
}

/* ==================== INFO BUTTONS & POPUPS ==================== */
#knnAnimationContainer .header-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  position: relative;
  text-align: center;
  flex: 1;
  width: 100%;
}

#knnAnimationContainer .header-center p {
  text-align: center;
  margin: 0 auto;
  max-width: 900px;
}

#knnAnimationContainer .info-btn {
  background: none;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  color: #4fc3f7;
  width: 20px;
  height: 20px;
  min-width: 20px;
  font-size: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: monospace;
  font-weight: bold;
  transition: all 0.2s ease;
  padding: 0;
}

#knnAnimationContainer .info-btn:hover {
  background: rgba(79, 195, 247, 0.2);
  border-color: #4fc3f7;
}

#knnAnimationContainer .panel-info-btn {
  font-size: 0.75em;
  width: 18px;
  height: 18px;
  min-width: 18px;
  border: 1px solid rgba(129, 199, 132, 0.5);
  color: #81C784;
}

#knnAnimationContainer .info-popup {
  display: none;
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  margin-top: 10px;
  background: rgba(15, 18, 20, 0.98);
  border: 1px solid rgba(76, 175, 80, 0.4);
  border-radius: 8px;
  padding: 12px;
  width: 300px;
  max-width: calc(100vw - 40px);
  max-height: 300px;
  overflow-y: auto;
  z-index: 99999;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
  text-align: left;
  backdrop-filter: blur(12px);
  color: #e0e0e0;
  font-size: 0.85em;
  line-height: 1.5;
}

#knnAnimationContainer .info-popup.active {
  display: block;
}

#knnAnimationContainer .info-popup-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

#knnAnimationContainer .info-popup-header strong {
  color: #4fc3f7;
}

#knnAnimationContainer .info-popup-close {
  background: none;
  border: none;
  color: #888;
  cursor: pointer;
  font-size: 16px;
  padding: 0;
  line-height: 1;
}

#knnAnimationContainer .info-popup-close:hover {
  color: #fff;
}

#knnAnimationContainer .panel-info-popup {
  width: 280px;
  max-height: 300px;
  overflow-y: auto;
  z-index: 100000;
}

#knnAnimationContainer .header-title-group {
  display: flex;
  align-items: center;
  gap: 8px;
  position: relative;
}

/* ==================== MODE SELECTION / CHOICE LOADING Z-INDEX ==================== */
/* These overlays must be above knnLoadingScreen (z-index: 9999) */

#modeSelectionLoading {
  z-index: 10002 !important;
}

#choiceLoadingScreen {
  z-index: 10002 !important;
}

/* ==================== MODE SELECTION SCREEN ==================== */

#knnAnimationContainer .mode-selection-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: radial-gradient(circle at center, #1e2520, #1a1d21);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  z-index: 10001;
  overflow-y: auto;
  padding: 24px 0;
}

#knnAnimationContainer .mode-selection-wrapper {
  text-align: center;
  max-width: 900px;
  width: 90%;
  position: relative;
  margin: auto 0;
}

#knnAnimationContainer .mode-selection-header h1 {
  font-size: 2.2em;
  font-weight: 700;
  background: linear-gradient(135deg, #4CAF50, #81C784);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 8px;
}

#knnAnimationContainer .mode-selection-subtitle {
  color: #888;
  font-size: 1em;
  margin-bottom: 40px;
}

#knnAnimationContainer .mode-cards-container {
  display: flex;
  gap: 30px;
  justify-content: center;
  margin-bottom: 40px;
}

#knnAnimationContainer .mode-card {
  background: rgba(30, 37, 32, 0.9);
  border: 1px solid rgba(76, 175, 80, 0.25);
  border-radius: 16px;
  padding: 35px 30px;
  cursor: pointer;
  transition: all 0.3s ease;
  text-align: left;
  width: 380px;
  position: relative;
  overflow: hidden;
}

#knnAnimationContainer .mode-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #4CAF50, #81C784);
  opacity: 0;
  transition: opacity 0.3s ease;
}

#knnAnimationContainer .mode-card:hover {
  background: rgba(40, 55, 42, 0.95);
  border-color: rgba(76, 175, 80, 0.5);
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(76, 175, 80, 0.15);
}

#knnAnimationContainer .mode-card:hover::before {
  opacity: 1;
}

#knnAnimationContainer .mode-card-icon {
  color: #81C784;
  margin-bottom: 18px;
}

#knnAnimationContainer .mode-card-title {
  font-size: 1.2em;
  font-weight: 700;
  color: #e0e0e0;
  margin-bottom: 10px;
}

#knnAnimationContainer .mode-card-desc {
  font-size: 0.85em;
  color: #999;
  line-height: 1.6;
  margin-bottom: 16px;
}

#knnAnimationContainer .mode-card-tags {
  display: flex;
  gap: 8px;
}

#knnAnimationContainer .mode-tag {
  font-size: 0.72em;
  padding: 4px 10px;
  border-radius: 20px;
  background: rgba(76, 175, 80, 0.12);
  color: #81C784;
  border: 1px solid rgba(76, 175, 80, 0.2);
}

#knnAnimationContainer .mode-back-btn {
  position: static;
  transform: none;
  margin-top: 20px;
}

#knnAnimationContainer .mode-back-btn:hover {
  transform: translateX(-2px);
}

/* ==================== PARAMETRIC ANALYSIS SCREEN ==================== */

#knnAnimationContainer .parametric-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: radial-gradient(circle at center, #1e2520, #1a1d21);
  display: flex;
  flex-direction: column;
  z-index: 10001;
  overflow-x: hidden;
  overflow-y: auto;
}

#knnAnimationContainer .parametric-header {
  background: linear-gradient(135deg, #1f2823, #242830);
  color: #ffffff;
  padding: 15px 20px;
  flex-shrink: 0;
  border-bottom: 1px solid rgba(76, 175, 80, 0.2);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
  z-index: 20;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
}

#knnAnimationContainer .parametric-header h1 {
  font-size: 1.4em;
  margin: 0;
  font-weight: 700;
  background: linear-gradient(135deg, #4CAF50, #81C784);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

#knnAnimationContainer .parametric-content {
  display: flex;
  flex: 1;
  overflow: hidden;
  min-height: 0;
}

/* Parametric Controls (Left Panel) */
#knnAnimationContainer .parametric-controls {
  width: 300px;
  flex-shrink: 0;
  background: #111;
  border-right: 1px solid #333;
  padding: 20px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

#knnAnimationContainer .parametric-control-group h3 {
  color: #81C784;
  font-size: 0.8em;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 12px;
  padding-bottom: 5px;
  border-bottom: 1px solid rgba(76, 175, 80, 0.3);
}

/* Sample Buttons */
#knnAnimationContainer .param-sample-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

#knnAnimationContainer .param-sample-btn {
  padding: 10px;
  background: rgba(76, 175, 80, 0.1);
  border: 1px solid rgba(76, 175, 80, 0.25);
  border-radius: 6px;
  color: #b0bec5;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
  font-size: 0.9em;
  text-align: center;
}

#knnAnimationContainer .param-sample-btn:hover {
  background: rgba(76, 175, 80, 0.2);
  transform: translateY(-1px);
}

#knnAnimationContainer .param-sample-btn.active {
  background: rgba(76, 175, 80, 0.25);
  border-color: #4CAF50;
  color: #4CAF50;
  box-shadow: 0 0 10px rgba(76, 175, 80, 0.3);
}

/* Radio Buttons */
#knnAnimationContainer .param-radio-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

#knnAnimationContainer .param-radio {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  padding: 8px 12px;
  border-radius: 6px;
  transition: background 0.2s;
}

#knnAnimationContainer .param-radio:hover {
  background: rgba(76, 175, 80, 0.08);
}

#knnAnimationContainer .param-radio input[type="radio"] {
  display: none;
}

#knnAnimationContainer .param-radio-custom {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid rgba(76, 175, 80, 0.4);
  position: relative;
  flex-shrink: 0;
  transition: all 0.2s;
}

#knnAnimationContainer .param-radio input[type="radio"]:checked + .param-radio-custom {
  border-color: #4CAF50;
}

#knnAnimationContainer .param-radio input[type="radio"]:checked + .param-radio-custom::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #4CAF50;
}

#knnAnimationContainer .param-radio-label {
  color: #b0bec5;
  font-size: 0.85em;
}

/* Train Button */
#knnAnimationContainer .param-train-btn {
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, #2e7d32, #388e3c);
  border: none;
  border-radius: 8px;
  color: white;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.3s ease;
  font-family: inherit;
  font-size: 1em;
  text-transform: uppercase;
  letter-spacing: 1px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  box-shadow: 0 4px 12px rgba(76, 175, 80, 0.3);
}

#knnAnimationContainer .param-train-btn:hover {
  background: linear-gradient(135deg, #388e3c, #43a047);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(76, 175, 80, 0.4);
}

#knnAnimationContainer .param-train-btn.training {
  background: #555;
  cursor: wait;
}

@keyframes paramSpinner {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

#knnAnimationContainer .train-spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: white;
  border-radius: 50%;
  display: inline-block;
  animation: paramSpinner 0.6s linear infinite;
}

/* Config Summary */
#knnAnimationContainer .param-config-summary {
  margin-top: auto;
  padding-top: 15px;
  border-top: 1px solid rgba(76, 175, 80, 0.15);
}

#knnAnimationContainer .param-config-summary h3 {
  color: #81C784;
  font-size: 0.75em;
  font-weight: 700;
  letter-spacing: 1.5px;
  margin-bottom: 10px;
}

#knnAnimationContainer .config-items {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

#knnAnimationContainer .config-item {
  display: flex;
  justify-content: space-between;
  font-size: 0.82em;
  color: #999;
}

#knnAnimationContainer .config-item span:last-child {
  color: #a2cf6e;
  font-weight: 600;
  font-family: 'Consolas', monospace;
}

/* Parametric Viz Area (Center) */
#knnAnimationContainer .parametric-viz-area {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 20px;
  overflow: hidden;
}

#knnAnimationContainer .parametric-viz-panel {
  flex: 1;
  background: rgba(30, 35, 33, 0.6);
  border: 1px solid rgba(76, 175, 80, 0.2);
  border-radius: 12px;
  padding: 15px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  backdrop-filter: blur(8px);
  min-height: 0;
}

#knnAnimationContainer .parametric-canvas-wrapper {
  flex: 1;
  min-height: 0;
}

/* Parametric Metrics Panel */
#knnAnimationContainer .parametric-metrics-panel {
  flex-shrink: 0;
  background: rgba(30, 35, 33, 0.6);
  border: 1px solid rgba(76, 175, 80, 0.2);
  border-radius: 12px;
  padding: 15px;
  backdrop-filter: blur(8px);
}

#knnAnimationContainer .param-metrics-chart {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 10px 0;
}

#knnAnimationContainer .param-metric-bar-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

#knnAnimationContainer .param-metric-label {
  width: 80px;
  font-size: 0.82em;
  color: #b0bec5;
  flex-shrink: 0;
  text-align: right;
}

#knnAnimationContainer .param-bar-track {
  flex: 1;
  height: 22px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 4px;
  overflow: hidden;
}

#knnAnimationContainer .param-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #4CAF50, #81C784);
  border-radius: 4px;
  transition: width 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

#knnAnimationContainer .param-metric-val {
  width: 60px;
  font-size: 0.82em;
  color: #a2cf6e;
  font-weight: 700;
  font-family: 'Consolas', monospace;
  flex-shrink: 0;
}

#knnAnimationContainer .param-no-data-msg {
  text-align: center;
  color: #666;
  font-size: 0.9em;
  padding: 20px;
  font-style: italic;
}

/* Parametric Guide (Right Panel) */
#knnAnimationContainer .parametric-guide {
  width: 360px;
  flex-shrink: 0;
  background: #111;
  border-left: 1px solid #333;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-height: 0;
}

#knnAnimationContainer .guide-title {
  color: #81C784;
  font-size: 0.9em;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  padding: 20px 20px 15px;
  border-bottom: 1px solid rgba(76, 175, 80, 0.2);
  flex-shrink: 0;
}

#knnAnimationContainer .guide-scroll-area {
  flex: 1;
  overflow-y: auto;
  padding: 15px;
  display: flex;
  flex-direction: column;
  gap: 15px;
}

#knnAnimationContainer .guide-scroll-area::-webkit-scrollbar {
  width: 5px;
}

#knnAnimationContainer .guide-scroll-area::-webkit-scrollbar-track {
  background: transparent;
}

#knnAnimationContainer .guide-scroll-area::-webkit-scrollbar-thumb {
  background: rgba(76, 175, 80, 0.3);
  border-radius: 3px;
}

/* Scenario Cards */
#knnAnimationContainer .scenario-card {
  background: rgba(30, 37, 32, 0.7);
  border: 1px solid rgba(76, 175, 80, 0.15);
  border-radius: 10px;
  overflow: hidden;
  transition: border-color 0.2s;
  flex-shrink: 0;
}

#knnAnimationContainer .scenario-card:hover {
  border-color: rgba(76, 175, 80, 0.35);
}

#knnAnimationContainer .scenario-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: rgba(76, 175, 80, 0.06);
  border-bottom: 1px solid rgba(76, 175, 80, 0.1);
}

#knnAnimationContainer .scenario-number {
  font-size: 1.4em;
  font-weight: 800;
  color: rgba(76, 175, 80, 0.3);
  font-family: 'Consolas', monospace;
  line-height: 1;
}

#knnAnimationContainer .scenario-header h4 {
  font-size: 0.85em;
  font-weight: 600;
  color: #e0e0e0;
  margin: 0;
}

#knnAnimationContainer .scenario-body {
  padding: 14px 16px;
}

#knnAnimationContainer .scenario-procedure,
#knnAnimationContainer .scenario-observations {
  margin-bottom: 10px;
}

#knnAnimationContainer .scenario-procedure:last-child,
#knnAnimationContainer .scenario-observations:last-child {
  margin-bottom: 0;
}

#knnAnimationContainer .scenario-body strong {
  font-size: 0.78em;
  color: #81C784;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

#knnAnimationContainer .scenario-body ol,
#knnAnimationContainer .scenario-body ul {
  margin: 8px 0 0 0;
  padding-left: 20px;
}

#knnAnimationContainer .scenario-body li {
  font-size: 0.78em;
  color: #b0bec5;
  line-height: 1.6;
  margin-bottom: 4px;
}

/* ==================== FEATURE AXIS SELECTORS ==================== */

#knnAnimationContainer .feature-axis-selectors {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: auto;
}

#knnAnimationContainer .axis-selector-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

#knnAnimationContainer .axis-selector-group label {
  font-size: 0.75em;
  color: #888;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

#knnAnimationContainer .feature-select {
  padding: 4px 8px;
  background: rgba(30, 37, 32, 0.9);
  border: 1px solid rgba(76, 175, 80, 0.3);
  border-radius: 4px;
  color: #b0bec5;
  font-family: 'Consolas', monospace;
  font-size: 0.75em;
  cursor: pointer;
  outline: none;
  transition: border-color 0.2s;
}

#knnAnimationContainer .feature-select:hover {
  border-color: rgba(76, 175, 80, 0.6);
}

#knnAnimationContainer .feature-select:focus {
  border-color: #4CAF50;
}

#knnAnimationContainer .feature-select option {
  background: #1a1d21;
  color: #b0bec5;
}

/* ==================== PARAMETRIC INFO BUTTONS ==================== */

#knnAnimationContainer .param-info-btn {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 1px solid rgba(76, 175, 80, 0.4);
  background: rgba(76, 175, 80, 0.1);
  color: #81C784;
  font-size: 0.65em;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: 'Georgia', serif;
  font-style: italic;
  flex-shrink: 0;
  position: relative;
}

#knnAnimationContainer .param-info-btn:hover {
  background: rgba(76, 175, 80, 0.25);
  border-color: #4CAF50;
}

#knnAnimationContainer .param-info-popup {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: rgba(15, 15, 20, 0.95);
  border: 1px solid rgba(76, 175, 80, 0.3);
  border-radius: 8px;
  padding: 12px 14px;
  width: 260px;
  z-index: 10010;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
  display: none;
  font-style: normal;
}

#knnAnimationContainer .param-info-popup.visible {
  display: block;
}

#knnAnimationContainer .param-info-popup p {
  font-size: 0.78em;
  color: #b0bec5;
  line-height: 1.5;
  margin: 0;
}

#knnAnimationContainer .param-info-popup .popup-title {
  font-size: 0.8em;
  font-weight: 700;
  color: #81C784;
  margin-bottom: 6px;
}

/* ==================== PARAMETRIC CLICK HINT ==================== */

#knnAnimationContainer .param-click-hint {
  text-align: center;
  color: #ffff00;
  font-size: 0.8em;
  padding: 6px 0 0;
  font-weight: bold;
}

/* ==================== CONTROL DESCRIPTIONS ==================== */
#knnAnimationContainer .control-description {
  font-size: 0.85em;
  color: #ffffff;
  font-weight: bold;
  padding-top: 10px;
  margin-top: 6px;
  margin-bottom: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  line-height: 1.5;
  letter-spacing: 0.2px;
}

#knnAnimationContainer .panel-description {
  font-size: 0.85em;
  color: #ffffff;
  font-weight: bold;
  padding: 10px 15px;
  margin-bottom: 5px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  line-height: 1.5;
  background: rgba(255, 255, 255, 0.03);
}

#knnAnimationContainer .control-header h3 {
  margin-bottom: 0;
}

#knnAnimationContainer .panel-header {
  border-bottom: none; /* We use panel-description border instead */
}