/**
 * VEC News — Animations CSS
 *
 * Camadas:
 *   1. Scroll Reveal  (vecn-reveal-pending / vecn-revealed)
 *   2. Skeleton Loading (vecn-skeleton-*)
 *   3. Page Transition  (#vecn-page-transition)
 *   4. Hero Entrance    (vecn-hero-entrance-*)
 *
 * Usa prefers-reduced-motion para acessibilidade — usuários com
 * sensibilidade a movimento recebem transições mínimas de opacidade.
 *
 * @package VecNews
 */

/* =============================================================================
   1. SCROLL REVEAL
   ============================================================================= */

.vecn-reveal-pending {
  opacity: 0;
  transform: translateY(24px);
  /* will-change: transform, opacity — só ativo durante a animação */
}

.vecn-revealed {
  opacity: 1;
  transform: translateY(0);
  transition:
    opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1) var(--reveal-delay, 0ms),
    transform 0.5s cubic-bezier(0.16, 1, 0.3, 1) var(--reveal-delay, 0ms);
}

/* Itens da lista "Mais Lidos" têm delay escalonado natural */
.vecn-most-read-item.vecn-reveal-pending {
  transform: translateX(-16px);
}

/* =============================================================================
   2. SKELETON LOADING
   ============================================================================= */

@keyframes vecn-shimmer {
  0%   { background-position: -800px 0; }
  100% { background-position: 800px 0; }
}

.vecn-skeleton-card {
  background: var(--vecn-surface-card, #fff);
  border-radius: var(--vecn-radius, 8px);
  overflow: hidden;
  box-shadow: var(--vecn-shadow-sm, 0 1px 3px rgba(0,0,0,.06));
  animation: vecn-skeleton-appear 0.3s ease both;
}

@keyframes vecn-skeleton-appear {
  from { opacity: 0; transform: scale(0.97); }
  to   { opacity: 1; transform: scale(1); }
}

.vecn-skeleton-thumb {
  height: 180px;
  width: 100%;
  background: linear-gradient(
    90deg,
    #f0f0f0 25%,
    #e8e8e8 37%,
    #f0f0f0 63%
  );
  background-size: 800px 100%;
  animation: vecn-shimmer 1.6s infinite linear;
}

.vecn-skeleton-body {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.vecn-skeleton-badge,
.vecn-skeleton-title,
.vecn-skeleton-meta {
  border-radius: 4px;
  background: linear-gradient(
    90deg,
    #f0f0f0 25%,
    #e8e8e8 37%,
    #f0f0f0 63%
  );
  background-size: 800px 100%;
  animation: vecn-shimmer 1.6s infinite linear;
}

.vecn-skeleton-badge  { height: 14px; width: 60px; }
.vecn-skeleton-title  { height: 18px; width: 100%; }
.vecn-skeleton-title--short { width: 72%; }
.vecn-skeleton-meta   { height: 12px; width: 45%; margin-top: 0.25rem; }

/* Fade-out ao remover skeleton */
.vecn-skeleton-fade-out {
  opacity: 0;
  transform: scale(0.96);
  transition: opacity 0.25s ease, transform 0.25s ease;
}

/* =============================================================================
   3. PAGE TRANSITION
   ============================================================================= */

#vecn-page-transition {
  position: fixed;
  inset: 0;
  z-index: 99999;
  background: var(--vecn-primary, #0a0f1e);
  pointer-events: none;

  /* Estado inicial: opaco (cobre a página ao navegar para cá) */
  opacity: 1;
  transition: none;
}

/* Entrada: a página atual faz fade-in */
#vecn-page-transition.vecn-transition-enter {
  transition: opacity 0.25s ease;
}

/* Visível e transitioning: torna transparente */
#vecn-page-transition.vecn-transition-done {
  opacity: 0;
}

/* Saída: volta a ficar opaco ao sair da página */
#vecn-page-transition.vecn-transition-exit {
  opacity: 1;
  transition: opacity 0.22s ease;
  pointer-events: all; /* bloqueia cliques durante a transição */
}

/* =============================================================================
   4. HERO ENTRANCE — Cascata de entrada no carregamento
   ============================================================================= */

.vecn-hero-entrance {
  opacity: 0;
}

.vecn-hero-entrance--lead {
  transform: scale(0.97) translateY(12px);
  transition:
    opacity 0.55s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.55s cubic-bezier(0.16, 1, 0.3, 1);
}

.vecn-hero-entrance--mini {
  transform: translateX(16px);
  transition:
    opacity 0.4s cubic-bezier(0.16, 1, 0.3, 1) var(--entrance-delay, 0ms),
    transform 0.4s cubic-bezier(0.16, 1, 0.3, 1) var(--entrance-delay, 0ms);
}

.vecn-hero-entrance--dual {
  transform: translateY(20px);
  transition:
    opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1) var(--entrance-delay, 0ms),
    transform 0.5s cubic-bezier(0.16, 1, 0.3, 1) var(--entrance-delay, 0ms);
}

.vecn-hero-entrance--visible {
  opacity: 1;
  transform: none;
}

/* =============================================================================
   5. HOVER LIFT — Elevação suave em cards interativos
   ============================================================================= */

.vecn-card {
  transition:
    box-shadow 0.2s cubic-bezier(0.4, 0, 0.2, 1),
    transform  0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.vecn-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 24px -4px rgba(0, 0, 0, 0.12), 0 4px 8px -2px rgba(0, 0, 0, 0.06);
}

/* Cards da lista Mini não levantam (são estreitos demais) */
.vecn-card-mini:hover {
  transform: none;
  box-shadow: var(--vecn-shadow-hover, 0 4px 12px rgba(0,0,0,.1));
}

/* =============================================================================
   6. LINK UNDERLINE ANIMADO — Sublinhado que aparece da esquerda
   ============================================================================= */

.vecn-nav-bar a,
.vecn-footer-nav a {
  position: relative;
  text-decoration: none;
}

.vecn-nav-bar a::after,
.vecn-footer-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--vecn-accent, #E63946);
  transition: width 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.vecn-nav-bar a:hover::after,
.vecn-footer-nav a:hover::after {
  width: 100%;
}

/* =============================================================================
   7. BADGE PULSE — Pulso sutil no badge de categoria do hero principal
   ============================================================================= */

.vecn-card-lead .vecn-badge-category,
.vecn-card-single-hero .vecn-badge-category {
  animation: vecn-badge-pulse 3s ease-in-out infinite;
}

@keyframes vecn-badge-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(230, 57, 70, 0.4); }
  50%       { box-shadow: 0 0 0 6px rgba(230, 57, 70, 0); }
}

/* =============================================================================
   8. BARRA DE PROGRESSO DE LEITURA — Animação da barra
   ============================================================================= */

#vecn-reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--vecn-accent, #E63946), var(--vecn-accent-2, #F4A261));
  z-index: 9999;
  transition: width 0.1s linear;
  border-radius: 0 2px 2px 0;
}

/* =============================================================================
   9. ACESSIBILIDADE — prefers-reduced-motion
   ============================================================================= */

@media (prefers-reduced-motion: reduce) {
  .vecn-reveal-pending,
  .vecn-revealed,
  .vecn-hero-entrance,
  .vecn-hero-entrance--lead,
  .vecn-hero-entrance--mini,
  .vecn-hero-entrance--dual,
  .vecn-card,
  .vecn-card:hover {
    transform: none !important;
    transition: opacity 0.2s ease !important;
    animation: none !important;
  }

  .vecn-reveal-pending { opacity: 0; }
  .vecn-revealed { opacity: 1; }
  .vecn-hero-entrance { opacity: 0; }
  .vecn-hero-entrance--visible { opacity: 1; }

  #vecn-page-transition {
    display: none !important;
  }

  .vecn-skeleton-thumb,
  .vecn-skeleton-badge,
  .vecn-skeleton-title,
  .vecn-skeleton-meta {
    animation: none;
    background: #f0f0f0;
  }

  @keyframes vecn-badge-pulse {
    0%, 100% { box-shadow: none; }
  }
}