/* Performance-focused CSS utilities */

.fonts-loaded {
  font-display: swap;
}

.measured {
  contain: layout;
}

.critical-section {
  contain: layout style;
  will-change: auto;
}

.optimized-animation {
  will-change: transform;
  transform: translateZ(0);
}

.optimized-animation.complete {
  will-change: auto;
}

.image-loading {
  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;
  }
}

.simple-shadow {
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.complex-shadow {
  box-shadow:
    0 1px 3px rgba(0, 0, 0, 0.12),
    0 1px 2px rgba(0, 0, 0, 0.24);
}

.smooth-scroll {
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
}

.dynamic-content {
  contain: layout style;
}

.optimized-text {
  text-rendering: optimizeSpeed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.no-select {
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

.gpu-accelerated {
  transform: translateZ(0);
  backface-visibility: hidden;
  perspective: 1000px;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

.layout-stable {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.content-area {
  flex: 1;
  contain: layout;
}

.cls-prevention {
  aspect-ratio: attr(width) / attr(height);
  width: 100%;
  height: auto;
}

.lazy-load {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 0.3s ease,
    transform 0.3s ease;
}

.lazy-load.loaded {
  opacity: 1;
  transform: translateY(0);
}

.preload-hint::before {
  content: "";
  display: none;
  background-image: var(--preload-image);
}