/**
 * Optimization und Animation-Klassen
 * Enthält Stile für Lazy-Loading, Animationen und Performance-Optimierungen
 */

/* Barrierefreiheit - Skip-Link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--primary-dark);
  color: var(--white);
  padding: 8px;
  z-index: 1000;
  transition: top 0.3s;
}

.skip-link:focus {
  top: 0;
  outline: 2px solid var(--accent-color);
}

/* Für Screenreader, versteckt visuell */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Lazy Loading Stile */
.lazy-image {
  opacity: 0;
  transition: opacity 0.3s ease-in-out;
}

.loaded {
  opacity: 1;
}

/* Standardmäßige Animation für Bild-Placeholder */
.image-placeholder {
  background: linear-gradient(110deg, #ececec 30%, #f5f5f5 50%, #ececec 70%);
  background-size: 200% 100%;
  animation: placeholderShimmer 1.5s infinite;
}

@keyframes placeholderShimmer {
  0% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0 50%;
  }
}

/* Animations-Klassen für Scroll-Effekte */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in {
  opacity: 1;
  transform: translateY(0);
}

.slide-left {
  transform: translateX(-50px);
}

.slide-right {
  transform: translateX(50px);
}

.zoom-in {
  transform: scale(0.9);
}

.slide-in-left {
  opacity: 1;
  transform: translateX(0);
}

.slide-in-right {
  opacity: 1;
  transform: translateX(0);
}

.zoom-in-animation {
  opacity: 1;
  transform: scale(1);
}

/* Button Ripple-Effekt */
.btn {
  position: relative;
  overflow: hidden;
}

.ripple {
  position: absolute;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.4);
  transform: scale(0);
  animation: ripple 0.6s linear;
  pointer-events: none;
}

@keyframes ripple {
  100% {
    transform: scale(4);
    opacity: 0;
  }
}

/* Hover-Effekte für Karten */
.hover-effect {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

/* Mobile Navigation Animationen */
.nav-menu {
  transition: right 0.3s ease;
}

.slide-in {
  animation: slideIn 0.3s forwards;
}

.slide-out {
  animation: slideOut 0.3s forwards;
}

@keyframes slideIn {
  from {
    right: -100%;
  }
  to {
    right: 0;
  }
}

@keyframes slideOut {
  from {
    right: 0;
  }
  to {
    right: -100%;
  }
}

/* Performance-Optimierungen */

/* Höhere Spezifität für wichtige Selektoren vermeiden */
img, svg, video {
  height: auto;
  max-width: 100%;
}

/* Hardware-Beschleunigung für Animationen verwenden */
.animated, .btn:hover, .feature-card:hover, .hero-overlay {
  will-change: transform, opacity;
  backface-visibility: hidden;
  transform: translateZ(0);
}

/* CSS-Variablen cachen für besser Rendering-Performance */
:root {
  --transition-fast: 0.2s ease;
  --transition-medium: 0.3s ease;
  --transition-slow: 0.5s ease;
  --box-shadow-small: 0 2px 5px rgba(0, 0, 0, 0.1);
  --box-shadow-medium: 0 5px 15px rgba(0, 0, 0, 0.1);
  --box-shadow-large: 0 8px 30px rgba(0, 0, 0, 0.15);
}

/* Responsive Bildunterstützung und Retina-Optimierung */
.responsive-image {
  width: 100%;
  height: auto;
}

/* Optimierte Schriftart-Rendering für bessere Lesbarkeit */
body {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* Verbesserte Barrierefreiheit - Hervorhebung von Fokus-Elementen */
*:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* Verbesserte Kontrastverhältnisse für Textlesbarkeit */
.feature-card h3, .stats-number, .testimonial-content p {
  color: var(--text-dark);
}

.testimonial-info p, .stats-label {
  color: var(--text-light);
}

/* Performance-optimierte Hover-Effekte */
@media (hover: hover) {
  .feature-card:hover,
  .team-card:hover,
  .animal-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--box-shadow-large);
    transition: transform var(--transition-medium), box-shadow var(--transition-medium);
  }
}

/* Deaktiviere aufwändige Animationen auf Geräten mit reduzierter Bewegung */
@media (prefers-reduced-motion: reduce) {
  *, 
  *::before,
  *::after {
    animation-duration: 0.001s !important;
    transition-duration: 0.001s !important;
  }
  
  .animate-on-scroll {
    opacity: 1;
    transform: none;
  }
  
  .parallax {
    background-attachment: scroll !important;
  }
}

/* Print-Optimierungen */
@media print {
  .no-print {
    display: none !important;
  }
  
  body {
    font-size: 12pt;
    color: #000;
    background-color: #fff;
  }
  
  a[href]::after {
    content: " (" attr(href) ")";
    font-size: 90%;
    color: #333;
  }
  
  img {
    max-width: 100% !important;
    page-break-inside: avoid;
  }
  
  .container {
    max-width: 100%;
    width: 100%;
  }
}