/* 
 * Metallura Website - Performance Optimizations
 * Critical CSS optimizations and mobile performance enhancements
 */

/* ============================================
   CRITICAL CSS OPTIMIZATIONS
   ============================================ */

/* Hardware acceleration for improved performance */
.gpu-optimized {
  transform: translateZ(0);
  backface-visibility: hidden;
  perspective: 1000px;
  will-change: transform;
}

/* Optimize heavy animations for better performance */
.bento-card,
.feature-card,
.contact-card,
.hero-cta-btn,
.btn,
.tab-btn {
  will-change: transform, opacity;
}

/* Remove will-change after animations complete */
.animation-complete {
  will-change: auto;
}

/* ============================================
   MOBILE PERFORMANCE OPTIMIZATIONS
   ============================================ */

/* Reduce GPU usage on mobile devices */
@media (max-width: 768px) {
  /* Simplify shadows on mobile */
  .shadow-xl,
  .shadow-2xl {
    box-shadow: var(--shadow-lg);
  }
  
  /* Reduce backdrop blur on mobile for better performance */
  .glass,
  .glass-card {
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
  }
  
  /* Disable complex transforms on mobile */
  .tilt-card:hover {
    transform: none;
  }
  
  .morphing-shape {
    animation: none !important;
  }
  
  /* Optimize bento card animations for mobile */
  .bento-card:hover {
    transform: translateY(-4px) scale(1.01);
  }
  
  /* Reduce parallax effects on mobile */
  .parallax-bg {
    transform: none !important;
  }
  
  /* Simplify magnetic effects */
  .magnetic-hover:hover::before {
    width: 100px;
    height: 100px;
  }
}

/* ============================================
   TOUCH-FRIENDLY OPTIMIZATIONS
   ============================================ */

/* Larger touch targets for mobile */
@media (max-width: 768px) {
  .btn,
  .nav-link,
  .tab-btn,
  .lang-toggle,
  .theme-toggle {
    min-height: 44px;
    min-width: 44px;
    padding: var(--space-3) var(--space-4);
  }
  
  .bento-card,
  .feature-card,
  .contact-card {
    min-height: 60px;
  }
  
  /* Improve tap highlighting */
  .bento-card,
  .feature-card,
  .contact-card,
  .btn,
  .nav-link {
    -webkit-tap-highlight-color: rgba(212, 130, 42, 0.2);
    tap-highlight-color: rgba(212, 130, 42, 0.2);
  }
  
  /* Better scroll performance on mobile */
  .hero-section,
  .contact-form-section,
  .products-bento-section {
    -webkit-overflow-scrolling: touch;
  }
}

/* ============================================
   IMAGE OPTIMIZATION
   ============================================ */

/* Optimize image loading */
img {
  loading: lazy;
  decoding: async;
}

/* Critical images should load immediately */
.hero-video,
.logo-img,
.hero-bg-img {
  loading: eager;
}

/* Image placeholder styles */
.img-placeholder {
  background: linear-gradient(
    90deg,
    var(--gray-200) 25%,
    var(--gray-100) 50%,
    var(--gray-200) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 2s infinite;
}

/* ============================================
   LOADING OPTIMIZATIONS
   ============================================ */

/* Skeleton loading states */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--gray-200) 25%,
    var(--gray-100) 50%,
    var(--gray-200) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 2s infinite;
  border-radius: var(--radius-md);
}

.skeleton-text {
  height: 1em;
  margin-bottom: 0.5em;
}

.skeleton-text:last-child {
  width: 80%;
}

.skeleton-avatar {
  width: 60px;
  height: 60px;
  border-radius: 50%;
}

.skeleton-card {
  height: 200px;
  width: 100%;
}

/* ============================================
   TYPOGRAPHY OPTIMIZATIONS
   ============================================ */

/* Optimize font rendering */
body {
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-kerning: auto;
  font-variant-ligatures: common-ligatures;
}

/* Preload critical fonts */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');
}

/* ============================================
   SCROLL OPTIMIZATIONS
   ============================================ */

/* Smooth scrolling with performance considerations */
html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

/* Optimize scroll performance */
.scroll-container {
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--copper) var(--gray-200);
}

/* Custom scrollbar for webkit browsers */
.scroll-container::-webkit-scrollbar {
  width: 8px;
}

.scroll-container::-webkit-scrollbar-track {
  background: var(--gray-200);
  border-radius: var(--radius-full);
}

.scroll-container::-webkit-scrollbar-thumb {
  background: var(--copper);
  border-radius: var(--radius-full);
}

.scroll-container::-webkit-scrollbar-thumb:hover {
  background: var(--copper-dark);
}

/* ============================================
   ANIMATION PERFORMANCE
   ============================================ */

/* Use transform instead of changing layout properties */
.performance-animation {
  transition: transform 0.3s ease, opacity 0.3s ease;
}

/* Avoid animating expensive properties */
.no-layout-animation {
  transition: transform 0.3s ease, opacity 0.3s ease, filter 0.3s ease;
}

/* Optimize keyframe animations */
@keyframes optimized-fade-in {
  from {
    opacity: 0;
    transform: translateY(20px) translateZ(0);
  }
  to {
    opacity: 1;
    transform: translateY(0) translateZ(0);
  }
}

@keyframes optimized-scale {
  from {
    transform: scale(0.9) translateZ(0);
  }
  to {
    transform: scale(1) translateZ(0);
  }
}

/* ============================================
   MEMORY OPTIMIZATION
   ============================================ */

/* Reduce memory usage for background images */
.bg-optimized {
  background-attachment: scroll; /* Avoid fixed backgrounds on mobile */
}

@media (max-width: 768px) {
  /* Remove complex backgrounds on mobile */
  .hero-section::before,
  .products-bento-section::before,
  .global-network-section::before {
    display: none;
  }
  
  /* Optimize particle systems for mobile */
  .particle-container {
    display: none;
  }
}

/* ============================================
   CRITICAL CSS INLINING
   ============================================ */

/* Above-the-fold critical styles */
.critical-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(15, 20, 25, 0.95);
  backdrop-filter: blur(20px);
}

.critical-hero {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #0f1419 0%, #243142 100%);
}

/* ============================================
   NETWORK OPTIMIZATION
   ============================================ */

/* Optimize for slow networks */
@media (prefers-reduced-data: reduce) {
  /* Disable video backgrounds */
  .hero-video {
    display: none;
  }
  
  /* Use simpler backgrounds */
  .hero-section {
    background: var(--primary-blue);
  }
  
  /* Reduce image quality */
  img {
    image-rendering: optimizeSpeed;
  }
  
  /* Disable complex animations */
  .morphing-shape,
  .particle,
  .parallax-bg {
    animation: none !important;
    transform: none !important;
  }
}

/* ============================================
   PRINT OPTIMIZATIONS
   ============================================ */

@media print {
  /* Hide non-essential elements */
  .hero-video,
  .particle-container,
  .theme-toggle,
  .mobile-menu-toggle,
  .back-to-top {
    display: none !important;
  }
  
  /* Optimize layout for print */
  .container {
    max-width: none;
    margin: 0;
    padding: 0;
  }
  
  /* Use print-friendly colors */
  .hero-section,
  .global-network-section {
    background: white !important;
    color: black !important;
  }
  
  /* Expand collapsed content */
  .tab-panel {
    opacity: 1 !important;
    visibility: visible !important;
    position: relative !important;
  }
}

/* ============================================
   ACCESSIBILITY OPTIMIZATIONS
   ============================================ */

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.5);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
  }
  
  .btn,
  .card,
  .form-input {
    border: 2px solid currentColor;
  }
}

/* Focus indicators for better accessibility */
.focus-visible {
  outline: 3px solid var(--copper);
  outline-offset: 2px;
}

/* Skip links for screen readers - removed */

/* ============================================
   BROWSER-SPECIFIC OPTIMIZATIONS
   ============================================ */

/* Safari-specific optimizations */
@supports (-webkit-appearance: none) {
  .glass,
  .glass-card {
    -webkit-backdrop-filter: blur(20px);
  }
}

/* Firefox-specific optimizations */
@-moz-document url-prefix() {
  .glass,
  .glass-card {
    background: rgba(255, 255, 255, 0.9);
  }
}

/* Edge-specific optimizations */
@supports (-ms-ime-align: auto) {
  .backdrop-blur {
    background: rgba(255, 255, 255, 0.9);
  }
}

/* ============================================
   DARK MODE OPTIMIZATIONS
   ============================================ */

[data-theme="dark"] {
  /* Optimize dark mode performance */
  color-scheme: dark;
}

[data-theme="dark"] .skeleton {
  background: linear-gradient(
    90deg,
    var(--gray-700) 25%,
    var(--gray-600) 50%,
    var(--gray-700) 75%
  );
}

/* ============================================
   FEATURE DETECTION OPTIMIZATIONS
   ============================================ */

/* Grid support fallback */
@supports not (display: grid) {
  .bento-grid {
    display: flex;
    flex-wrap: wrap;
  }
  
  .bento-card {
    flex: 1 1 300px;
    margin: var(--space-3);
  }
}

/* Flexbox gap fallback */
@supports not (gap: 1rem) {
  .flex {
    margin: calc(-1 * var(--space-2));
  }
  
  .flex > * {
    margin: var(--space-2);
  }
}

/* ============================================
   FINAL PERFORMANCE CLEANUP
   ============================================ */

/* Remove unused vendor prefixes */
.no-vendor-prefix {
  appearance: none;
  user-select: none;
  box-sizing: border-box;
}

/* Optimize painting */
.contain-paint {
  contain: paint;
}

.contain-layout {
  contain: layout;
}

.contain-style {
  contain: style;
}

/* Layer promotion for better compositing */
.promote-layer {
  transform: translateZ(0);
  opacity: 0.9999;
}

/* Final performance tweaks */
* {
  box-sizing: border-box;
}

*::before,
*::after {
  box-sizing: inherit;
}