/* ===== LAZY LOADING STYLES ===== */

/* Estados de carga de imagen */
img[data-lazy] {
  opacity: 0;
  transition: opacity 0.3s ease;
}

img.loading {
  opacity: 0.5;
}

img.loaded {
  opacity: 1;
}

img.error {
  opacity: 0.7;
  filter: grayscale(100%);
}

/* ===== SKELETON LOADING STYLES ===== */

.skeleton {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 2s infinite;
  border-radius: 8px;
}

.skeleton-image {
  width: 100%;
  height: 200px; /* Altura por defecto, ajustar según necesidad */
  margin-bottom: 1rem;
}

.skeleton-text {
  width: 100%;
}

.skeleton-line {
  height: 1rem;
  margin-bottom: 0.5rem;
  background: inherit;
  border-radius: 4px;
}

.skeleton-line.short {
  width: 60%;
}

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

/* ===== SCROLL ANIMATIONS ===== */

/* Elementos animados - estado inicial */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-in {
  opacity: 0;
  transition: opacity 0.6s ease;
}

.slide-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.slide-right {
  opacity: 0;
  transform: translateX(30px);
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Elementos animados - estado final */
.fade-up.animate-in {
  opacity: 1;
  transform: translateY(0);
}

.fade-in.animate-in {
  opacity: 1;
}

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

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

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

/* Reducir motion para usuarios que lo prefieren */
@media (prefers-reduced-motion: reduce) {
  .fade-up,
  .fade-in,
  .slide-left,
  .slide-right {
    transition: none;
  }
  
  .skeleton {
    animation: none;
    background: #f0f0f0;
  }
}

/* Mejoras de performance para móviles */
@media (max-width: 768px) {
  .fade-up,
  .slide-left,
  .slide-right {
    transform: none; /* Reducir transforms en móvil */
  }
  
  .fade-up.animate-in,
  .slide-left.animate-in,
  .slide-right.animate-in {
    transform: none;
  }
}

/* ===== LOADING STATES ESPECÍFICOS ===== */

/* Skeleton para project cards */
.project-card.loading .project-card__cover {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 2s infinite;
  min-height: 200px;
}

.project-card.loading .project-card__title,
.project-card.loading .project-card__description {
  background: #f0f0f0;
  color: transparent;
  border-radius: 4px;
}

/* Skeleton para hero image */
.hero__photo.loading {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 2s infinite;
}

/* ===== SMOOTH SCROLL ===== */

html {
  scroll-behavior: smooth;
}

/* Para navegadores que no soportan scroll-behavior */
@supports not (scroll-behavior: smooth) {
  html {
    scroll-behavior: auto;
  }
}

/* ===== INTERSECTION OBSERVER FALLBACKS ===== */

/* Para navegadores sin soporte */
.no-intersection-observer img[data-lazy] {
  opacity: 1;
}

.no-intersection-observer .fade-up,
.no-intersection-observer .fade-in,
.no-intersection-observer .slide-left,
.no-intersection-observer .slide-right {
  opacity: 1;
  transform: none;
}

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

/* Respetar preferencias de animación */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus visible para lazy images */
img[data-lazy]:focus-visible {
  outline: 2px solid var(--color-accent, #007acc);
  outline-offset: 2px;
}