/* ============================================================================
   NLarchive Body Component - Professional, Modern, Educational
   ============================================================================ */

/* CSS Custom Properties (Variables) */
:root {
  /* Primary Color Palette */
  --nl-primary: #0066cc;
  --nl-secondary: #00bfae;
  --nl-accent: #ff6b9d;
  
  /* Neutral Colors */
  --nl-dark: #1a1d23;
  --nl-light: #f8fafc;
  --nl-text: #2d3748;
  --nl-text-muted: #6b7280;
  --nl-border: #e2e8f0;
  
  /* Typography */
  --nl-font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  --nl-font-size-base: 16px;
  --nl-line-height-base: 1.6;
  
  /* Spacing */
  --nl-spacing-xs: 0.5rem;
  --nl-spacing-sm: 1rem;
  --nl-spacing-md: 1.5rem;
  --nl-spacing-lg: 2rem;
  --nl-spacing-xl: 3rem;
  
  /* Effects */
  --nl-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --nl-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --nl-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --nl-border-radius: 0.5rem;
  --nl-border-radius-lg: 1rem;
}

/* Base Body Styles */
.nl-body {
  /* Layout */
  min-height: 100vh;
  margin: 0;
  padding: 0;
  overflow-x: hidden;
  
  /* Typography */
  font-family: var(--nl-font-family);
  font-size: var(--nl-font-size-base);
  line-height: var(--nl-line-height-base);
  color: var(--nl-text);
  
  /* Background */
  background: linear-gradient(135deg, var(--nl-light) 0%, #ffffff 100%);
  
  /* Behavior */
  scroll-behavior: smooth;
  
  /* Transitions */
  transition: var(--nl-transition);
}

/* Background Pattern Layer */
.nl-body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 20% 80%, rgba(0, 191, 174, 0.03) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(0, 102, 204, 0.03) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
}

/* Global Element Transitions */
.nl-body * {
  transition: var(--nl-transition);
}

/* Selection Styling */
.nl-body ::selection {
  background: var(--nl-secondary);
  color: white;
}

/* Focus Outline for Accessibility */
.nl-body *:focus {
  outline: 2px solid var(--nl-primary);
  outline-offset: 2px;
}

/* ============================================================================
   Demo-Specific Styles
   ============================================================================ */

/* Main Content Container */
.nl-body__container {
  width: 100%;
  min-height: 100vh;
}

.demo-content {
  max-width: 1000px;
  margin: 0 auto;
  padding: var(--nl-spacing-xl) var(--nl-spacing-lg);
}

/* Demo Navigation */
.demo-nav {
  text-align: center;
  margin-bottom: var(--nl-spacing-lg);
}

.demo-nav__link {
  color: var(--nl-primary);
  text-decoration: none;
  font-weight: 600;
  padding: var(--nl-spacing-sm) var(--nl-spacing-md);
  border-radius: var(--nl-border-radius);
  transition: var(--nl-transition);
}

.demo-nav__link:hover {
  background: var(--nl-light);
  transform: translateX(-4px);
}

/* Demo Header */
.demo-header {
  text-align: center;
  margin-bottom: var(--nl-spacing-xl);
}

.demo-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  color: var(--nl-dark);
  margin: 0;
  background: linear-gradient(135deg, var(--nl-primary), var(--nl-secondary));
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Demo Sections */
.demo-section {
  margin-bottom: var(--nl-spacing-xl);
  padding: var(--nl-spacing-lg);
  border-radius: var(--nl-border-radius-lg);
  border-left: 4px solid;
}

.demo-section--primary {
  background: #eef2ff;
  border-left-color: var(--nl-primary);
}

.demo-section--secondary {
  background: #f0f9ff;
  border-left-color: var(--nl-secondary);
}

.demo-section--accent {
  background: #fff7ed;
  border-left-color: var(--nl-accent);
}

.demo-section__title {
  font-size: 2rem;
  font-weight: 600;
  color: var(--nl-dark);
  margin: 0 0 var(--nl-spacing-md) 0;
}

.demo-section__text {
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--nl-text);
  margin: 0;
}

/* Demo Features List */
.demo-features {
  list-style: none;
  padding: 0;
  margin: var(--nl-spacing-md) 0 0 0;
}

.demo-features__item {
  margin-bottom: var(--nl-spacing-md);
  padding-left: var(--nl-spacing-md);
  position: relative;
  color: var(--nl-text);
  line-height: 1.7;
}

.demo-features__item::before {
  content: '✓';
  position: absolute;
  left: 0;
  top: 0;
  color: var(--nl-secondary);
  font-weight: bold;
  font-size: 1.1rem;
}

.demo-features__item:last-child {
  margin-bottom: 0;
}

/* ============================================================================
   Demo Showcase Components
   ============================================================================ */

/* Demo Showcase Container */
.demo-showcase {
  background: white;
  padding: var(--nl-spacing-lg);
  border-radius: var(--nl-border-radius-lg);
  margin: var(--nl-spacing-lg) 0;
  box-shadow: var(--nl-shadow);
  border: 1px solid var(--nl-border);
}

.demo-showcase__title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--nl-primary);
  margin: 0 0 var(--nl-spacing-sm) 0;
}

.demo-showcase__text {
  color: var(--nl-text);
  margin: 0 0 var(--nl-spacing-md) 0;
}

/* Color Grid Demo */
.demo-color-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--nl-spacing-md);
  margin-top: var(--nl-spacing-md);
}

.demo-color-item {
  padding: var(--nl-spacing-md);
  color: white;
  border-radius: var(--nl-border-radius);
  text-align: center;
  font-weight: 600;
}

.demo-color-item--primary {
  background: var(--nl-primary);
}

.demo-color-item--secondary {
  background: var(--nl-secondary);
}

.demo-color-item--accent {
  background: var(--nl-accent);
}

/* Typography Demo */
.demo-typography {
  margin-top: var(--nl-spacing-md);
}

.demo-typography__heading {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--nl-dark);
  margin: var(--nl-spacing-sm) 0;
}

.demo-typography__subheading {
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--nl-primary);
  margin: var(--nl-spacing-sm) 0;
}

.demo-typography__body {
  font-size: 1.1rem;
  line-height: 1.6;
  color: var(--nl-text);
  margin: var(--nl-spacing-sm) 0;
}

/* Accessibility Demo */
.demo-accessibility {
  display: flex;
  gap: var(--nl-spacing-md);
  flex-wrap: wrap;
  margin: var(--nl-spacing-md) 0;
}

.demo-btn {
  background: var(--nl-primary);
  color: white;
  border: none;
  padding: var(--nl-spacing-sm) var(--nl-spacing-md);
  border-radius: var(--nl-border-radius);
  cursor: pointer;
  font-weight: 600;
  transition: var(--nl-transition);
}

.demo-btn--primary {
  background: var(--nl-primary);
}

.demo-btn--secondary {
  background: var(--nl-secondary);
}

.demo-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--nl-shadow);
}

.demo-link {
  color: var(--nl-primary);
  text-decoration: underline;
  padding: var(--nl-spacing-sm);
  border-radius: var(--nl-border-radius);
  transition: var(--nl-transition);
}

.demo-link:hover {
  background: var(--nl-light);
}

.demo-tip {
  margin-top: var(--nl-spacing-md);
  font-size: 0.9rem;
  color: var(--nl-text-muted);
  font-style: italic;
}

/* Facts List */
.demo-facts {
  list-style: none;
  padding: 0;
  margin: 0;
}

.demo-facts__item {
  margin-bottom: var(--nl-spacing-md);
  padding-left: var(--nl-spacing-md);
  position: relative;
  color: var(--nl-text);
  line-height: 1.7;
}

.demo-facts__item::before {
  content: '✓';
  position: absolute;
  left: 0;
  top: 0;
  color: var(--nl-secondary);
  font-weight: bold;
  font-size: 1.1rem;
}

.demo-facts__item:last-child {
  margin-bottom: 0;
}

/* Best Practices Grid */
.demo-practices {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--nl-spacing-md);
  margin-top: var(--nl-spacing-md);
}

.demo-practice {
  background: rgba(255, 255, 255, 0.7);
  padding: var(--nl-spacing-md);
  border-radius: var(--nl-border-radius);
  backdrop-filter: blur(10px);
}

.demo-practice__title {
  color: var(--nl-dark);
  margin: 0 0 var(--nl-spacing-xs) 0;
  font-size: 1.1rem;
  font-weight: 600;
}

.demo-practice__text {
  margin: 0;
  font-size: 0.9rem;
  color: var(--nl-text);
  line-height: 1.6;
}

/* ============================================================================
   Interactive Demo Controls Styling
   ============================================================================ */

.control-description {
  margin: var(--nl-spacing-xs) 0 0 0;
  font-size: 0.9rem;
  color: var(--nl-text-muted);
  line-height: 1.4;
}

/* Range input styling */
.control-group input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  background: var(--nl-border);
  border-radius: 3px;
  padding: 0;
  margin: var(--nl-spacing-xs) 0;
}

.control-group input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  background: var(--nl-primary);
  border-radius: 50%;
  cursor: pointer;
  border: 2px solid white;
  box-shadow: var(--nl-shadow);
}

.control-group input[type="range"]::-moz-range-thumb {
  width: 20px;
  height: 20px;
  background: var(--nl-primary);
  border-radius: 50%;
  cursor: pointer;
  border: 2px solid white;
  box-shadow: var(--nl-shadow);
}

/* Color input styling */
.control-group input[type="color"] {
  height: 50px;
  border: none;
  border-radius: var(--nl-border-radius);
  cursor: pointer;
  box-shadow: var(--nl-shadow);
}

/* Button hover states */
#reset-body-changes:hover {
  background: #4b5563 !important;
  transform: translateY(-2px);
}

/* ============================================================================
   Responsive Design
   ============================================================================ */

@media (max-width: 768px) {
  .demo-content {
    padding: var(--nl-spacing-lg) var(--nl-spacing-md);
  }
  
  .demo-section {
    padding: var(--nl-spacing-md);
  }
  
  .demo-section__title {
    font-size: 1.5rem;
  }
  
  .demo-section__text {
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  .demo-content {
    padding: var(--nl-spacing-md) var(--nl-spacing-sm);
  }
  
  .demo-section {
    padding: var(--nl-spacing-sm);
    border-left-width: 3px;
  }
  
  .demo-section__title {
    font-size: 1.3rem;
  }
}