/* About Modal Styles */

.about-modal {
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border-primary);
  border-radius: var(--border-radius-lg);
  max-width: 900px;
  width: 95%;
  max-height: 85vh;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  animation: modalSlideIn 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.dark-mode .about-modal {
  background: var(--color-bg-primary-dark);
  border-color: var(--color-border-primary-dark);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.about-modal-content {
  display: flex;
  flex-direction: column;
  height: 100%;
}

/* Header */
.about-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px 16px 24px;
  border-bottom: 1px solid var(--color-border-primary);
  background: linear-gradient(135deg, var(--color-bg-secondary) 0%, var(--color-bg-primary) 100%);
}

.dark-mode .about-modal-header {
  background: linear-gradient(135deg, var(--color-bg-secondary-dark) 0%, var(--color-bg-primary-dark) 100%);
  border-bottom-color: var(--color-border-primary-dark);
}

.about-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-text-primary);
  margin: 0;
  letter-spacing: -0.02em;
  line-height: 1.2;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
    sans-serif;
}

.dark-mode .about-title {
  color: var(--color-text-primary-dark);
}

.about-close-button {
  background: none;
  border: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  padding: 8px;
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-normal);
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-close-button:hover {
  background: var(--color-bg-secondary);
  color: var(--color-text-primary);
}

.dark-mode .about-close-button {
  color: var(--color-text-secondary-dark);
}

.dark-mode .about-close-button:hover {
  background: var(--color-bg-secondary-dark);
  color: var(--color-text-primary-dark);
}

/* Body */
.about-modal-body {
  padding: 20px 24px;
  overflow-y: auto;
  flex: 1;
}

/* Hero Section */
.about-hero {
  margin-bottom: 24px;
  text-align: center;
}

.about-description {
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text-primary);
  margin: 0 0 24px 0;
  text-align: left;
}

.dark-mode .about-description {
  color: var(--color-text-primary-dark);
}

.about-section {
  margin-bottom: 24px;
}

.about-section:last-child {
  margin-bottom: 0;
}

.about-section-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin: 0 0 12px 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
    sans-serif;
}

.dark-mode .about-section-title {
  color: var(--color-text-primary-dark);
}

.about-section-text {
  font-size: 14px;
  line-height: 1.5;
  color: var(--color-text-secondary);
  margin: 0;
}

.dark-mode .about-section-text {
  color: var(--color-text-secondary-dark);
}

/* Content Grid Layout */
.about-content-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
  margin-top: 24px;
}

.about-column {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Pipeline Demo */
.pipeline-demo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin: 16px 0;
  padding: 20px;
  background: var(--color-bg-secondary);
  border-radius: var(--border-radius-md);
  border: 1px solid var(--color-border-primary);
  flex-wrap: wrap;
}

.dark-mode .pipeline-demo {
  background: var(--color-bg-secondary-dark);
  border-color: var(--color-border-primary-dark);
}

/* Pipeline Steps */
.pipeline-steps {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.step-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0;
}

.step-content {
  flex: 1;
}

.step-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
}

.step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  border: 1px solid var(--color-text-secondary);
  border-radius: 50%;
  font-size: 12px;
  font-weight: 700;
}

.dark-mode .step-number {
  background: var(--color-bg-primary-dark);
  color: var(--color-text-primary-dark);
  border-color: var(--color-text-secondary-dark);
}

.step-description {
  font-size: 13px;
  line-height: 1.4;
  color: var(--color-text-secondary);
  margin: 0;
}

.dark-mode .step-description {
  color: var(--color-text-secondary-dark);
}

.step-example {
  flex-shrink: 0;
}

/* Mini Matrix */
.mini-matrix {
  font-family: 'Courier New', monospace;
  font-size: 6px;
  line-height: 1;
  background: white;
  padding: 4px;
  border-radius: 2px;
  border: 1px solid var(--color-border-primary);
}

.dark-mode .mini-matrix {
  background: var(--color-bg-secondary-dark);
  border-color: var(--color-border-primary-dark);
}

.mini-row {
  margin: 0;
  padding: 0;
  line-height: 1.1;
  margin-bottom: 1px;
}

.zero-value {
  opacity: .5;
}

/* Vector Preview */
.vector-preview {
  font-family: 'Courier New', monospace;
  font-size: 8px;
  line-height: 1.2;
  background: var(--color-bg-primary);
  padding: 6px;
  border-radius: 2px;
  border: 1px solid var(--color-border-primary);
  max-width: 120px;
  word-break: break-all;
  color: var(--color-text-primary);
  font-weight: 600;
  letter-spacing: -0.3px;
}

.dark-mode .vector-preview {
  background: var(--color-bg-primary-dark);
  border-color: var(--color-border-primary-dark);
  color: var(--color-text-primary-dark);
}

/* Coordinates */
.coordinates {
  display: flex;
  flex-direction: column;
  gap: 2px;
  font-family: 'Courier New', monospace;
  font-size: 9px;
  background: var(--color-bg-primary);
  padding: 6px;
  border-radius: 2px;
  border: 1px solid var(--color-border-primary);
}

.dark-mode .coordinates {
  background: var(--color-bg-primary-dark);
  border-color: var(--color-border-primary-dark);
}

.coord {
  color: var(--color-accent);
  font-weight: 600;
}

.dark-mode .coord {
  color: var(--color-accent-dark);
}

/* Font Cluster Demo */
.font-cluster-demo {
  display: flex;
  gap: 6px;
  align-items: center;
  padding: 6px;
  background: var(--color-bg-primary);
  border-radius: 2px;
  border: 1px solid var(--color-border-primary);
}

.dark-mode .font-cluster-demo {
  background: var(--color-bg-primary-dark);
  border-color: var(--color-border-primary-dark);
}

.font-sample {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-primary);
  line-height: 1;
}

.dark-mode .font-sample {
  color: var(--color-text-primary-dark);
}

/* Subtitle */
.about-subtitle {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin: 20px 0 8px 0;
}

.dark-mode .about-subtitle {
  color: var(--color-text-primary-dark);
}

/* Code Link */
.code-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-primary);
  text-decoration: underline;
  margin-top: 8px;
  margin-bottom: 24px;
  transition: color var(--transition-normal);
}

.code-link:hover {
  color: var(--color-text-secondary);
}

.dark-mode .code-link {
  color: var(--color-text-primary-dark);
}

.dark-mode .code-link:hover {
  color: var(--color-text-secondary-dark);
}

/* Inline Link */
.inline-link {
  color: var(--color-text-primary);
  text-decoration: underline;
  font-size: 12px;
  font-weight: 500;
  transition: color var(--transition-normal);
}

.inline-link:hover {
  color: var(--color-text-secondary);
}

.dark-mode .inline-link {
  color: var(--color-text-primary-dark);
}

.dark-mode .inline-link:hover {
  color: var(--color-text-secondary-dark);
}


/* Animation */
@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: scale(0.9) translateY(20px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

/* Google Fonts link styling */
.about-modal .google-fonts-link {
  color: var(--color-text-primary);
  text-decoration: underline;
  font-weight: 500;
  transition: color var(--transition-normal);
}

.about-modal .google-fonts-link:hover {
  color: var(--color-text-secondary);
}

.dark-mode .about-modal .google-fonts-link {
  color: var(--color-text-primary-dark);
}

.dark-mode .about-modal .google-fonts-link:hover {
  color: var(--color-text-secondary-dark);
}

/* Tech list styling */
.about-tech-list {
  margin: 12px 0 16px 0;
  padding-left: 0;
  list-style: none;
}

.about-tech-list li {
  font-size: 14px;
  line-height: 1.5;
  color: var(--color-text-secondary);
  margin-bottom: 8px;
  padding-left: 20px;
  position: relative;
}

.about-tech-list li:before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: bold;
}

.about-tech-list li:last-child {
  margin-bottom: 0;
}

.dark-mode .about-tech-list li {
  color: var(--color-text-secondary-dark);
}

.dark-mode .about-tech-list li:before {
  color: var(--color-accent-dark);
}

.about-tech-list strong {
  color: var(--color-text-primary);
  font-weight: 600;
}

.dark-mode .about-tech-list strong {
  color: var(--color-text-primary-dark);
}

/* Legacy pixel matrix demo - now using pipeline-demo */
.pixel-matrix-demo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin: 20px 0;
  padding: 20px;
  background: var(--color-bg-secondary);
  border-radius: var(--border-radius-md);
  border: 1px solid var(--color-border-primary);
  flex-wrap: wrap;
}

.dark-mode .pixel-matrix-demo {
  background: var(--color-bg-secondary-dark);
  border-color: var(--color-border-primary-dark);
}

.demo-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  min-width: 120px;
}

.demo-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.dark-mode .demo-label {
  color: var(--color-accent-dark);
}

.pixel-matrix {
  font-family: 'Courier New', monospace;
  font-size: 8px;
  line-height: 1;
  background: white;
  padding: 4px;
  border-radius: 2px;
  border: 1px solid var(--color-border-primary);
}

.dark-mode .pixel-matrix {
  background: var(--color-bg-secondary-dark);
  border-color: var(--color-border-primary-dark);
}

.pixel-row {
  margin: 0;
  padding: 0;
  line-height: 1.2;
  margin-bottom: 1px;
}

.vector-demo {
  font-family: 'Courier New', monospace;
  font-size: 8px;
  line-height: 1.2;
  background: var(--color-bg-primary);
  padding: 6px;
  border-radius: 2px;
  border: 1px solid var(--color-border-primary);
  max-width: 200px;
  word-break: break-all;
  color: var(--color-text-secondary);
}

.dark-mode .vector-demo {
  background: var(--color-bg-primary-dark);
  border-color: var(--color-border-primary-dark);
  color: var(--color-text-secondary-dark);
}

.umap-demo {
  display: flex;
  flex-direction: column;
  gap: 2px;
  font-family: 'Courier New', monospace;
  font-size: 10px;
  background: var(--color-bg-primary);
  padding: 8px;
  border-radius: 2px;
  border: 1px solid var(--color-border-primary);
}

.dark-mode .umap-demo {
  background: var(--color-bg-primary-dark);
  border-color: var(--color-border-primary-dark);
}

.coordinate {
  color: var(--color-accent);
  font-weight: 600;
}

.dark-mode .coordinate {
  color: var(--color-accent-dark);
}

.demo-caption {
  font-size: 10px;
  color: var(--color-text-secondary);
  text-align: center;
  font-style: italic;
}

.dark-mode .demo-caption {
  color: var(--color-text-secondary-dark);
}

.demo-arrow {
  font-size: 16px;
  color: var(--color-accent);
  font-weight: bold;
}

.dark-mode .demo-arrow {
  color: var(--color-accent-dark);
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .about-modal {
    max-width: 95%;
    width: 95%;
  }
  
  .about-content-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  
  .step-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  
  .step-example {
    align-self: center;
  }
  
  .mini-matrix {
    font-size: 5px;
  }
  
  .vector-preview {
    font-size: 7px;
    max-width: 100px;
  }
  
  .coordinates {
    font-size: 8px;
  }
}

@media (max-width: 480px) {
  .about-modal-header {
    padding: 16px 20px 12px 20px;
  }
  
  .about-modal-body {
    padding: 16px 20px;
  }
  
  .about-title {
    font-size: 20px;
  }
  
  .info-card {
    padding: 12px;
  }
  
  .pipeline-demo {
    padding: 12px;
  }
}