/* ========================================
   Feedforward Neural Network / MLP Styles
   ======================================== */

/* CSS Variables */
.mlp-container {
  --mlp-primary: #6366f1;
  --mlp-secondary: #4f46e5;
  --mlp-accent: #8b5cf6;
  --mlp-success: #10b981;
  --mlp-warning: #f59e0b;
  --mlp-danger: #ef4444;
  --mlp-info: #06b6d4;
  --mlp-light: #f8fafc;
  --mlp-dark: #1e293b;
  --mlp-text: #334155;
  --mlp-text-light: #64748b;
  --mlp-bg: #ffffff;
  --mlp-border: #e2e8f0;
  --mlp-shadow: rgba(0, 0, 0, 0.1);
  --mlp-radius: 12px;
  --mlp-radius-sm: 8px;
  --mlp-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Base Container */
.mlp-container {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  line-height: 1.6;
  color: var(--mlp-text);
  max-width: 1400px;
  margin: 0 auto;
  padding: 20px;
  background: var(--mlp-bg);
  border-radius: var(--mlp-radius);
  box-shadow: 0 4px 6px var(--mlp-shadow);
}

/* Header */
.mlp-container header {
  text-align: center;
  margin-bottom: 30px;
  padding: 40px 20px;
  background: linear-gradient(135deg, var(--mlp-primary) 0%, var(--mlp-accent) 50%, #a855f7 100%);
  color: white;
  border-radius: var(--mlp-radius);
  position: relative;
  overflow: hidden;
}

.mlp-container header::before {
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 50%;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 200 100'%3E%3Ccircle cx='30' cy='50' r='10' fill='rgba(255,255,255,0.1)'/%3E%3Ccircle cx='70' cy='30' r='8' fill='rgba(255,255,255,0.1)'/%3E%3Ccircle cx='70' cy='70' r='8' fill='rgba(255,255,255,0.1)'/%3E%3Ccircle cx='110' cy='50' r='8' fill='rgba(255,255,255,0.1)'/%3E%3Ccircle cx='150' cy='35' r='8' fill='rgba(255,255,255,0.1)'/%3E%3Ccircle cx='150' cy='65' r='8' fill='rgba(255,255,255,0.1)'/%3E%3Ccircle cx='180' cy='50' r='12' fill='rgba(255,255,255,0.15)'/%3E%3Cline x1='40' y1='50' x2='62' y2='35' stroke='rgba(255,255,255,0.1)' stroke-width='2'/%3E%3Cline x1='40' y1='50' x2='62' y2='65' stroke='rgba(255,255,255,0.1)' stroke-width='2'/%3E%3Cline x1='78' y1='35' x2='102' y2='50' stroke='rgba(255,255,255,0.1)' stroke-width='2'/%3E%3Cline x1='78' y1='70' x2='102' y2='50' stroke='rgba(255,255,255,0.1)' stroke-width='2'/%3E%3Cline x1='118' y1='50' x2='142' y2='35' stroke='rgba(255,255,255,0.1)' stroke-width='2'/%3E%3Cline x1='118' y1='50' x2='142' y2='65' stroke='rgba(255,255,255,0.1)' stroke-width='2'/%3E%3Cline x1='158' y1='35' x2='168' y2='50' stroke='rgba(255,255,255,0.1)' stroke-width='2'/%3E%3Cline x1='158' y1='65' x2='168' y2='50' stroke='rgba(255,255,255,0.1)' stroke-width='2'/%3E%3C/svg%3E") no-repeat center;
  opacity: 0.6;
}

.mlp-container header h1 {
  margin: 0 0 10px 0;
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  position: relative;
  z-index: 1;
}

.mlp-container header .subtitle {
  margin: 5px 0;
  font-size: 1.2rem;
  opacity: 0.95;
  font-weight: 300;
  position: relative;
  z-index: 1;
}

.mlp-container header .author {
  font-size: 0.9rem;
  opacity: 0.8;
  margin-top: 10px;
  position: relative;
  z-index: 1;
}

/* Navigation Tabs */
.mlp-container .viz-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 30px;
  flex-wrap: wrap;
  justify-content: center;
}

.mlp-container .tab-btn {
  padding: 12px 18px;
  border: 2px solid var(--mlp-border);
  background: var(--mlp-bg);
  color: var(--mlp-text);
  border-radius: var(--mlp-radius-sm);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--mlp-transition);
  flex: 1;
  min-width: 90px;
  max-width: 140px;
}

.mlp-container .tab-btn:hover {
  background: var(--mlp-light);
  border-color: var(--mlp-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px var(--mlp-shadow);
}

.mlp-container .tab-btn.active {
  background: var(--mlp-primary);
  color: white;
  border-color: var(--mlp-primary);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

/* Tab Content */
.mlp-container .tab-content {
  min-height: 500px;
  display: none;
  animation: mlpFadeIn 0.3s ease-in-out;
}

.mlp-container .tab-content.active {
  display: block;
}

@keyframes mlpFadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Content Layout */
.mlp-container .viz-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
  margin-bottom: 30px;
}

.mlp-container .viz-layout-full {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 30px;
  margin-bottom: 30px;
}

@media (max-width: 1024px) {
  .mlp-container .viz-layout,
  .mlp-container .viz-layout-full {
    grid-template-columns: 1fr;
  }
}

/* Canvas Wrapper */
.mlp-container .canvas-wrapper {
  background: var(--mlp-light);
  border-radius: var(--mlp-radius);
  padding: 20px;
  position: relative;
  min-height: 400px;
}

.mlp-container .canvas-wrapper.large {
  min-height: 500px;
}

.mlp-container .canvas-wrapper canvas {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--mlp-radius-sm);
  background: white;
}

/* Controls Panel */
.mlp-container .controls-panel {
  background: var(--mlp-light);
  padding: 25px;
  border-radius: var(--mlp-radius);
  border-left: 4px solid var(--mlp-primary);
}

.mlp-container .controls-panel h3 {
  margin: 0 0 15px 0;
  color: var(--mlp-dark);
  font-size: 1.4rem;
  font-weight: 600;
}

.mlp-container .controls-panel h4 {
  margin: 20px 0 10px 0;
  color: var(--mlp-secondary);
  font-size: 1.1rem;
  font-weight: 600;
}

.mlp-container .controls-panel p {
  margin-bottom: 15px;
  line-height: 1.7;
  color: var(--mlp-text);
}

.mlp-container .panel-desc {
  margin-bottom: 20px;
  line-height: 1.7;
  color: var(--mlp-text-light);
  font-style: italic;
}

/* Formula Display */
.mlp-container .formula-display {
  background: white;
  padding: 15px 20px;
  border-radius: var(--mlp-radius-sm);
  margin: 15px 0;
  border: 1px solid var(--mlp-border);
}

.mlp-container .formula-row {
  display: flex;
  align-items: center;
  gap: 15px;
  margin: 10px 0;
}

.mlp-container .formula-label {
  color: var(--mlp-text-light);
  font-size: 0.9rem;
  min-width: 100px;
}

.mlp-container .formula-text {
  font-family: 'Courier New', monospace;
  font-size: 1.1rem;
  color: var(--mlp-primary);
  font-weight: 600;
}

/* Slider Controls */
.mlp-container .slider-group {
  margin: 12px 0;
}

.mlp-container .slider-group label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 5px;
  font-size: 0.9rem;
  color: var(--mlp-text);
}

.mlp-container .slider-group label span {
  font-weight: 600;
  color: var(--mlp-primary);
  min-width: 50px;
  text-align: right;
}

.mlp-container .slider-group input[type="range"] {
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--mlp-border);
  outline: none;
  -webkit-appearance: none;
}

.mlp-container .slider-group input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--mlp-primary);
  cursor: pointer;
  transition: var(--mlp-transition);
}

.mlp-container .slider-group input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 0 10px rgba(99, 102, 241, 0.5);
}

/* Select Control */
.mlp-container select {
  width: 100%;
  padding: 10px 15px;
  border: 2px solid var(--mlp-border);
  border-radius: var(--mlp-radius-sm);
  background: white;
  font-size: 1rem;
  color: var(--mlp-text);
  cursor: pointer;
  transition: var(--mlp-transition);
}

.mlp-container select:hover {
  border-color: var(--mlp-primary);
}

.mlp-container select:focus {
  outline: none;
  border-color: var(--mlp-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

/* Action Buttons */
.mlp-container .action-btn {
  padding: 10px 20px;
  border: none;
  border-radius: var(--mlp-radius-sm);
  background: var(--mlp-primary);
  color: white;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--mlp-transition);
  margin-right: 10px;
  margin-bottom: 10px;
}

.mlp-container .action-btn:hover {
  background: var(--mlp-secondary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.mlp-container .action-btn.secondary {
  background: var(--mlp-text-light);
}

.mlp-container .action-btn.secondary:hover {
  background: var(--mlp-text);
}

/* Animation Control */
.mlp-container .animation-control {
  margin: 15px 0;
}

/* Info Box */
.mlp-container .info-box {
  background: linear-gradient(135deg, var(--mlp-info) 0%, #0891b2 100%);
  color: white;
  padding: 15px 20px;
  border-radius: var(--mlp-radius-sm);
  margin: 15px 0;
}

.mlp-container .info-box h4 {
  color: white;
  margin-top: 0;
}

.mlp-container .info-box p {
  color: white;
  margin: 0;
}

/* Insight Box */
.mlp-container .insight-box {
  background: white;
  padding: 15px 20px;
  border-radius: var(--mlp-radius-sm);
  margin: 15px 0;
  border: 2px solid var(--mlp-primary);
}

.mlp-container .insight-box.warning {
  border-color: var(--mlp-warning);
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.1) 0%, rgba(245, 158, 11, 0.05) 100%);
}

.mlp-container .insight-box h4 {
  margin-top: 0;
  color: var(--mlp-dark);
}

.mlp-container .insight-box p {
  margin: 8px 0;
  color: var(--mlp-text);
}

/* Function Selector */
.mlp-container .function-selector {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 15px 0;
}

.mlp-container .func-btn {
  padding: 8px 14px;
  border: 2px solid var(--mlp-border);
  background: white;
  color: var(--mlp-text);
  border-radius: var(--mlp-radius-sm);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
  transition: var(--mlp-transition);
}

.mlp-container .func-btn:hover {
  border-color: var(--mlp-accent);
  background: var(--mlp-light);
}

.mlp-container .func-btn.active {
  background: var(--mlp-accent);
  color: white;
  border-color: var(--mlp-accent);
}

/* Function Info */
.mlp-container .function-info {
  background: white;
  padding: 20px;
  border-radius: var(--mlp-radius-sm);
  margin: 15px 0;
  border: 1px solid var(--mlp-border);
}

.mlp-container .info-section {
  display: flex;
  gap: 10px;
  padding: 8px 0;
  border-bottom: 1px solid var(--mlp-border);
}

.mlp-container .info-section:last-child {
  border-bottom: none;
}

.mlp-container .info-label {
  color: var(--mlp-text-light);
  min-width: 80px;
  flex-shrink: 0;
}

.mlp-container .info-value {
  color: var(--mlp-text);
  font-family: 'Courier New', monospace;
}

/* Comparison Table */
.mlp-container .comparison-table {
  margin: 15px 0;
}

.mlp-container .comparison-table table {
  width: 100%;
  border-collapse: collapse;
  background: white;
  border-radius: var(--mlp-radius-sm);
  overflow: hidden;
  font-size: 0.9rem;
}

.mlp-container .comparison-table th,
.mlp-container .comparison-table td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--mlp-border);
}

.mlp-container .comparison-table th {
  background: var(--mlp-dark);
  color: white;
  font-weight: 600;
}

.mlp-container .comparison-table td.good {
  color: var(--mlp-success);
  font-weight: 500;
}

.mlp-container .comparison-table td.bad {
  color: var(--mlp-danger);
  font-weight: 500;
}

.mlp-container .comparison-table td.warn {
  color: var(--mlp-warning);
  font-weight: 500;
}

/* Theorem Box */
.mlp-container .theorem-box {
  background: linear-gradient(135deg, var(--mlp-success) 0%, #059669 100%);
  color: white;
  padding: 20px;
  border-radius: var(--mlp-radius-sm);
  margin: 15px 0;
}

.mlp-container .theorem-box h4 {
  color: white;
  margin-top: 0;
}

.mlp-container .theorem-box p {
  color: white;
  margin: 10px 0 0 0;
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Geometric Insight */
.mlp-container .geometric-insight {
  background: white;
  padding: 15px 20px;
  border-radius: var(--mlp-radius-sm);
  margin: 15px 0;
  border: 2px solid var(--mlp-accent);
}

.mlp-container .geometric-insight h4 {
  margin-top: 0;
  color: var(--mlp-accent);
}

/* Gradient Info */
.mlp-container .gradient-info {
  background: white;
  padding: 15px 20px;
  border-radius: var(--mlp-radius-sm);
  margin: 15px 0;
}

.mlp-container .gradient-info h4 {
  margin-top: 0;
}

.mlp-container .status-display {
  padding: 15px;
  background: var(--mlp-light);
  border-radius: var(--mlp-radius-sm);
  text-align: center;
  font-weight: 500;
  color: var(--mlp-text-light);
}

.mlp-container .status-display.active {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
  color: var(--mlp-primary);
}

/* Toggle Buttons */
.mlp-container .toggle-buttons {
  display: flex;
  gap: 10px;
  margin-top: 10px;
}

.mlp-container .toggle-btn {
  flex: 1;
  padding: 10px 15px;
  border: 2px solid var(--mlp-border);
  background: white;
  color: var(--mlp-text);
  border-radius: var(--mlp-radius-sm);
  cursor: pointer;
  font-size: 0.9rem;
  transition: var(--mlp-transition);
}

.mlp-container .toggle-btn:hover {
  border-color: var(--mlp-primary);
}

.mlp-container .toggle-btn.active {
  background: var(--mlp-primary);
  color: white;
  border-color: var(--mlp-primary);
}

/* Reason Box */
.mlp-container .reason-box {
  background: white;
  padding: 15px 20px;
  border-radius: var(--mlp-radius-sm);
  margin: 15px 0;
  border-left: 4px solid var(--mlp-accent);
}

.mlp-container .reason-box h4 {
  margin-top: 0;
  color: var(--mlp-dark);
}

.mlp-container .reason-item {
  display: flex;
  align-items: center;
  gap: 15px;
  padding: 10px 0;
  border-bottom: 1px solid var(--mlp-border);
}

.mlp-container .reason-item:last-child {
  border-bottom: none;
}

.mlp-container .reason-num {
  width: 28px;
  height: 28px;
  background: var(--mlp-accent);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 0.9rem;
  flex-shrink: 0;
}

/* Evidence Box */
.mlp-container .evidence-box {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(16, 185, 129, 0.05) 100%);
  padding: 15px 20px;
  border-radius: var(--mlp-radius-sm);
  margin: 15px 0;
  border: 1px solid var(--mlp-success);
}

.mlp-container .evidence-box h4 {
  margin-top: 0;
  color: var(--mlp-success);
}

.mlp-container .evidence-box ul {
  margin: 0;
  padding-left: 20px;
}

.mlp-container .evidence-box li {
  padding: 5px 0;
  color: var(--mlp-text);
}

/* Guide Layout */
.mlp-container .guide-layout {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 30px;
}

.mlp-container .guide-section {
  background: var(--mlp-light);
  padding: 20px;
  border-radius: var(--mlp-radius);
  border-left: 4px solid var(--mlp-primary);
}

.mlp-container .guide-section.full-width {
  grid-column: 1 / -1;
}

.mlp-container .guide-section h3 {
  margin: 0 0 15px 0;
  color: var(--mlp-dark);
  font-size: 1.2rem;
}

@media (max-width: 768px) {
  .mlp-container .guide-layout {
    grid-template-columns: 1fr;
  }
}

/* Guide Card */
.mlp-container .guide-card {
  background: white;
  padding: 15px;
  border-radius: var(--mlp-radius-sm);
}

.mlp-container .recommendation {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--mlp-border);
}

.mlp-container .recommendation:last-child {
  border-bottom: none;
}

.mlp-container .rec-label {
  color: var(--mlp-text-light);
}

.mlp-container .rec-value {
  font-weight: 600;
  color: var(--mlp-primary);
}

/* Init Pairs */
.mlp-container .init-pairs {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.mlp-container .init-pair {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 15px;
  background: white;
  border-radius: var(--mlp-radius-sm);
}

.mlp-container .init-act {
  font-weight: 600;
  color: var(--mlp-accent);
  min-width: 100px;
}

.mlp-container .arrow {
  color: var(--mlp-text-light);
}

.mlp-container .init-method {
  color: var(--mlp-text);
}

/* Technique List */
.mlp-container .technique-list {
  margin: 0;
  padding-left: 20px;
}

.mlp-container .technique-list li {
  padding: 8px 0;
  color: var(--mlp-text);
}

.mlp-container .technique-list.warning li {
  color: var(--mlp-danger);
}

/* Case List */
.mlp-container .case-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.mlp-container .case-item {
  display: flex;
  align-items: center;
  gap: 15px;
  padding: 12px 15px;
  background: white;
  border-radius: var(--mlp-radius-sm);
}

.mlp-container .case-icon {
  width: 32px;
  height: 32px;
  background: var(--mlp-primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  flex-shrink: 0;
}

.mlp-container .case-info {
  display: flex;
  flex-direction: column;
}

.mlp-container .case-info strong {
  color: var(--mlp-dark);
}

.mlp-container .case-info span {
  color: var(--mlp-text-light);
  font-size: 0.85rem;
}

/* Timeline */
.mlp-container .timeline {
  margin: 15px 0;
}

.mlp-container .timeline-item {
  display: flex;
  gap: 15px;
  padding: 10px 0;
  border-left: 3px solid var(--mlp-border);
  padding-left: 15px;
  margin-left: 10px;
  position: relative;
}

.mlp-container .timeline-item::before {
  content: "";
  position: absolute;
  left: -8px;
  top: 50%;
  transform: translateY(-50%);
  width: 12px;
  height: 12px;
  background: var(--mlp-primary);
  border-radius: 50%;
}

.mlp-container .timeline-item .year {
  font-weight: 600;
  color: var(--mlp-primary);
  min-width: 50px;
}

.mlp-container .timeline-item .event {
  color: var(--mlp-text);
}

/* Summary */
.mlp-container .summary {
  background: linear-gradient(135deg, var(--mlp-dark) 0%, var(--mlp-secondary) 100%);
  color: white;
}

.mlp-container .summary h3 {
  color: white;
}

.mlp-container .summary-box {
  background: rgba(255, 255, 255, 0.1);
  padding: 20px;
  border-radius: var(--mlp-radius-sm);
  text-align: center;
}

.mlp-container .summary-box p {
  color: white;
  margin: 0;
  font-size: 1.1rem;
  font-weight: 500;
  line-height: 1.6;
}

/* Footer */
.mlp-container .quote-section {
  text-align: center;
  padding: 30px 20px;
  margin-top: 40px;
  border-top: 2px solid var(--mlp-border);
  color: var(--mlp-text-light);
}

.mlp-container .quote-section blockquote {
  font-size: 1.3rem;
  font-style: italic;
  margin: 0 0 10px 0;
  color: var(--mlp-primary);
  line-height: 1.8;
}

.mlp-container .quote-section cite {
  font-style: normal;
  color: var(--mlp-text-light);
}

/* Responsive Design */
@media (max-width: 768px) {
  .mlp-container {
    padding: 15px;
  }

  .mlp-container header h1 {
    font-size: 1.8rem;
  }

  .mlp-container header .subtitle {
    font-size: 1rem;
  }

  .mlp-container .viz-tabs {
    flex-direction: column;
  }

  .mlp-container .tab-btn {
    max-width: none;
    min-width: auto;
  }

  .mlp-container .controls-panel {
    padding: 15px;
  }

  .mlp-container .controls-panel h3 {
    font-size: 1.2rem;
  }

  .mlp-container header::before {
    display: none;
  }
}

/* Print Styles */
@media print {
  .mlp-container .viz-tabs {
    display: none;
  }

  .mlp-container {
    box-shadow: none;
    border: 1px solid #ddd;
  }
}

/* Accessibility */
.mlp-container .tab-btn:focus,
.mlp-container .func-btn:focus,
.mlp-container .toggle-btn:focus,
.mlp-container .action-btn:focus {
  outline: 2px solid var(--mlp-info);
  outline-offset: 2px;
}

/* Animations */
@keyframes mlpPulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
}

@keyframes mlpFlow {
  0% {
    transform: translateX(-10px);
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    transform: translateX(10px);
    opacity: 0;
  }
}

.mlp-container .mlp-pulse {
  animation: mlpPulse 2s ease-in-out infinite;
}

/* Utility Classes */
.mlp-container .text-center {
  text-align: center;
}

.mlp-container .mt-2 {
  margin-top: 20px;
}

.mlp-container .mb-2 {
  margin-bottom: 20px;
}