/**
 * GLOBAL FACILITA | SISTEMA GLOBAL DE SKELETON LOADING
 * ==============================================================================
 * Sistema profissional de Skeleton Screens para todo o site e blog.
 * Substitui telas brancas, layout shifts (CLS) e spinners por placeholders
 * animados que reproduzem fielmente a geometria do conteúdo final.
 * Suporte a tema claro e escuro, acessibilidade (prefers-reduced-motion)
 * e animação suave via aceleração de GPU (shimmer gradient).
 * ==============================================================================
 */

/* ------------------------------------------------------------------------------
   1. KEYFRAMES & SHIMMER CORE
   ------------------------------------------------------------------------------ */
@keyframes skeleton-shimmer {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

@keyframes skeleton-pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.55;
  }
}

@keyframes skeleton-fade-in {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Indicador linear discreto de carregamento no topo da viewport */
#global-skeleton-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, #00B5FC, #023D90, #00B5FC);
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.4s ease-in-out infinite;
  z-index: 999999;
  pointer-events: none;
  transition: opacity 0.4s ease, transform 0.4s ease;
}

#global-skeleton-bar.is-hidden {
  opacity: 0;
  transform: translateY(-3px);
  visibility: hidden;
}

/* Shimmer Padrão (Fundo Claro) */
.skeleton-shimmer {
  background: linear-gradient(90deg, #F1F5F9 0%, #E2E8F0 50%, #F1F5F9 100%);
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.6s cubic-bezier(0.4, 0, 0.6, 1) infinite;
  border-radius: 6px;
}

/* Shimmer Dark (Para Seções Escuras, Leitor de Artigo e Modais) */
.skeleton-shimmer-dark {
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.12) 50%, rgba(255, 255, 255, 0.05) 100%);
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.6s cubic-bezier(0.4, 0, 0.6, 1) infinite;
  border-radius: 6px;
}

/* ------------------------------------------------------------------------------
   2. ELEMENTOS PRIMITIVOS DE SKELETON
   ------------------------------------------------------------------------------ */
.skeleton-box {
  display: block;
}

.skeleton-circle {
  border-radius: 50% !important;
}

.skeleton-pill {
  border-radius: 9999px !important;
}

.skeleton-line {
  height: 14px;
  margin-bottom: 8px;
  border-radius: 4px;
}

.skeleton-line:last-child {
  margin-bottom: 0;
}

/* ------------------------------------------------------------------------------
   3. SKELETON DO HEADER GLOBAL (BARRA DE NAVEGAÇÃO)
   ------------------------------------------------------------------------------ */
.site-header-skeleton {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 80px;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
  z-index: 1000;
  display: flex;
  align-items: center;
}

.site-header-skeleton .header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

.skeleton-brand-box {
  width: 150px;
  height: 38px;
  border-radius: 8px;
}

.skeleton-nav-row {
  display: flex;
  align-items: center;
  gap: 28px;
}

@media (max-width: 992px) {
  .skeleton-nav-row {
    display: none;
  }
}

.skeleton-nav-pill {
  height: 18px;
  border-radius: 9999px;
}

.skeleton-cta-box {
  width: 155px;
  height: 42px;
  border-radius: 9999px;
}

@media (max-width: 640px) {
  .skeleton-cta-box {
    width: 40px;
    height: 40px;
    border-radius: 10px;
  }
}

/* ------------------------------------------------------------------------------
   4. SKELETON DO BLOG | ARTIGO EM DESTAQUE (3ª DOBRA)
   ------------------------------------------------------------------------------ */
.blog-featured-skeleton {
  display: grid;
  grid-template-columns: 52% 48%;
  background-color: #FFFFFF;
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 0 12px 32px rgba(7, 18, 40, 0.05);
  border: 1.5px solid #E2E8F0;
  min-height: 380px;
}

@media (max-width: 960px) {
  .blog-featured-skeleton {
    grid-template-columns: 1fr;
  }
}

.blog-featured-skeleton .skeleton-media {
  width: 100%;
  height: 100%;
  min-height: 340px;
  border-radius: 0;
}

.blog-featured-skeleton .skeleton-body {
  padding: 44px 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 16px;
}

@media (max-width: 640px) {
  .blog-featured-skeleton .skeleton-body {
    padding: 28px 20px;
  }
}

/* ------------------------------------------------------------------------------
   5. SKELETON DOS CARDS DE ARTIGOS DO FEED & FOOTER (GRID EM 3 COLUNAS)
   ------------------------------------------------------------------------------ */
.skeleton-article-card {
  background-color: #FFFFFF;
  border: 1px solid #E5E7EB;
  border-radius: 20px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
  min-height: 440px;
}

.skeleton-article-card .skeleton-card-visual {
  height: 240px;
  width: 100%;
  border-radius: 0;
}

.skeleton-article-card .skeleton-card-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  flex: 1;
}

.skeleton-article-card .skeleton-card-cat {
  width: 120px;
  height: 20px;
}

.skeleton-article-card .skeleton-card-title-1 {
  width: 92%;
  height: 22px;
}

.skeleton-article-card .skeleton-card-title-2 {
  width: 65%;
  height: 22px;
}

.skeleton-article-card .skeleton-card-btn {
  width: 110px;
  height: 38px;
  margin-top: auto;
  border-radius: 9999px;
}

/* ------------------------------------------------------------------------------
   6. SKELETON DO LEITOR DE ARTIGO COMPLETO (artigo.html)
   ------------------------------------------------------------------------------ */
.skeleton-article-reader {
  max-width: 860px;
  margin: 0 auto;
  padding: 40px 0 60px;
  animation: skeleton-fade-in 0.3s ease;
}

.skeleton-article-reader .skeleton-reader-breadcrumbs {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
}

.skeleton-article-reader .skeleton-reader-badge {
  width: 140px;
  height: 28px;
  margin-bottom: 20px;
}

.skeleton-article-reader .skeleton-reader-title-1 {
  width: 95%;
  height: 40px;
  margin-bottom: 12px;
}

.skeleton-article-reader .skeleton-reader-title-2 {
  width: 78%;
  height: 40px;
  margin-bottom: 28px;
}

.skeleton-article-reader .skeleton-reader-author-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  border-top: 1px solid #E2E8F0;
  border-bottom: 1px solid #E2E8F0;
  margin-bottom: 36px;
}

.skeleton-article-reader .skeleton-author-meta {
  display: flex;
  align-items: center;
  gap: 14px;
}

.skeleton-article-reader .skeleton-author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
}

.skeleton-article-reader .skeleton-reader-media-banner {
  width: 100%;
  height: 440px;
  border-radius: 20px;
  margin-bottom: 40px;
}

@media (max-width: 768px) {
  .skeleton-article-reader .skeleton-reader-media-banner {
    height: 260px;
  }
}

.skeleton-article-reader .skeleton-reader-lead {
  border-left: 3px solid rgba(0, 181, 252, 0.5);
  padding-left: 20px;
  margin-bottom: 36px;
}

.skeleton-article-reader .skeleton-reader-h2 {
  width: 280px;
  height: 28px;
  margin: 36px 0 16px;
}

.skeleton-article-reader .skeleton-reader-paragraph {
  margin-bottom: 28px;
}

.skeleton-article-reader .skeleton-reader-highlight {
  border-radius: 16px;
  height: 120px;
  margin: 32px 0;
}

/* ------------------------------------------------------------------------------
   7. SKELETON DA PÁGINA DE CATEGORIA (categoria.html)
   ------------------------------------------------------------------------------ */
.skeleton-category-hero {
  padding: 20px 0;
}

.skeleton-category-hero .skeleton-cat-kicker {
  width: 160px;
  height: 18px;
  margin-bottom: 14px;
}

.skeleton-category-hero .skeleton-cat-title {
  width: 360px;
  height: 48px;
  margin-bottom: 16px;
}

@media (max-width: 640px) {
  .skeleton-category-hero .skeleton-cat-title {
    width: 85%;
    height: 36px;
  }
}

.skeleton-category-hero .skeleton-cat-desc {
  width: 80%;
  height: 20px;
}

/* ------------------------------------------------------------------------------
   8. SKELETON DO DROPDOWN DE PRELOAD DE BUSCA EM TEMPO REAL
   ------------------------------------------------------------------------------ */
.skeleton-preload-dropdown {
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.skeleton-preload-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 0;
}

.skeleton-preload-item .skeleton-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  flex-shrink: 0;
}

.skeleton-preload-item .skeleton-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

/* ------------------------------------------------------------------------------
   9. CARREGAMENTO PROGRESSIVO DE IMAGENS EM TODAS AS PÁGINAS
   ------------------------------------------------------------------------------ */
.img-skeleton-holder {
  position: relative;
  overflow: hidden;
  background-color: #F1F5F9;
}

.img-skeleton-holder::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, #F1F5F9 0%, #E2E8F0 50%, #F1F5F9 100%);
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.6s cubic-bezier(0.4, 0, 0.6, 1) infinite;
  z-index: 1;
  pointer-events: none;
  transition: opacity 0.35s ease;
}

.img-skeleton-holder.is-loaded::before {
  opacity: 0;
}

.img-skeleton-holder img {
  opacity: 0;
  transition: opacity 0.35s ease-in-out;
  position: relative;
  z-index: 2;
}

.img-skeleton-holder.is-loaded img,
.img-skeleton-holder img.is-loaded {
  opacity: 1;
}

/* ------------------------------------------------------------------------------
   10. ACESSIBILIDADE | RESPEITO A PREFERS-REDUCED-MOTION
   ------------------------------------------------------------------------------ */
@media (prefers-reduced-motion: reduce) {
  .skeleton-shimmer,
  .skeleton-shimmer-dark,
  #global-skeleton-bar,
  .img-skeleton-holder::before {
    animation: skeleton-pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite !important;
  }
}