/* Core Web Vitals & Performance Optimizations */

/* Critical Rendering Path Optimization */
@media (prefers-reduced-motion: no-preference) {
  * {
    scroll-behavior: smooth;
  }
}

/* Largest Contentful Paint (LCP) Optimization */
.hero-section h1 {
  font-display: swap;
  contain: layout style paint;
}

/* First Input Delay (FID) Optimization */
.btn, button, [role="button"] {
  touch-action: manipulation;
  will-change: transform;
  backface-visibility: hidden;
}

.btn:hover, button:hover, [role="button"]:hover {
  transform: translateZ(0);
}

/* Cumulative Layout Shift (CLS) Prevention */
.name-card {
  min-height: 120px;
  contain: layout;
}

.category-card {
  min-height: 200px;
  contain: layout;
}

.accordion-item {
  contain: layout;
}

/* Image optimization for better CLS */
img {
  height: auto;
  max-width: 100%;
}

/* Prevent layout shifts from font loading */
@font-face {
  font-display: swap;
}

/* Reduce paint complexity */
.search-result-item {
  contain: layout style paint;
}

/* GPU acceleration for smooth animations */
.fade-in {
  transform: translateZ(0);
  will-change: opacity, transform;
}

/* Optimize scrolling performance */
.modal-body {
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

/* Reduce reflow on hover states */
.name-card:hover {
  contain: layout;
}

/* Critical CSS for above-the-fold content */
.hero-section {
  contain: layout style;
}

/* Optimize Bootstrap accordion performance */
.accordion-collapse {
  will-change: height;
}

/* Performance-optimized button states */
.btn-primary {
  transition: background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

/* Optimize dropdown performance */
.dropdown-menu {
  contain: layout style paint;
  will-change: transform, opacity;
}

/* Memory-efficient animations */
.loading-spinner {
  animation: spin 1s linear infinite;
  will-change: transform;
}

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

/* Search input optimization */
#generatorSearch, #categorySearch {
  contain: layout style;
  will-change: auto;
}

/* Reduce paint on scroll */
.navbar {
  contain: layout style paint;
}

/* Footer optimization */
footer {
  contain: layout style paint;
}

/* Mobile performance optimizations */
@media (max-width: 768px) {
  .container {
    contain: layout;
  }
  
  .card {
    contain: layout style;
  }
  
  /* Reduce complexity on mobile */
  .btn:hover {
    transform: none;
  }
}

/* Critical performance styles for Core Web Vitals */
.performance-critical {
  contain: strict;
  content-visibility: auto;
  contain-intrinsic-size: 300px;
}

/* Intersection Observer optimizations */
.lazy-load {
  content-visibility: auto;
  contain-intrinsic-size: 200px;
}

/* Reduce layout thrashing */
.grid-container {
  contain: layout;
}

/* Optimize form performance */
.form-control:focus {
  contain: layout style;
}

/* SEO-friendly loading states */
.skeleton {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: loading 1.5s infinite;
}

@keyframes loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Prevent cumulative layout shift on dynamic content */
.dynamic-content {
  min-height: 100px;
  contain: layout;
}

/* Optimize table performance for large datasets */
.data-table {
  contain: layout style;
  table-layout: fixed;
}

/* Critical path optimization */
.above-fold {
  contain: layout style paint;
}

.below-fold {
  content-visibility: auto;
  contain-intrinsic-size: 500px;
}