/* =====================================================================
   Efeitos — ebooks em 3D, revelação ao rolar e microinterações.
   Carregado depois de styles.css/theme.css. Respeita prefers-reduced-motion.
   ===================================================================== */

/* ---- Ebook em 3D (catálogo e destaques) ---- */
.ebook-card > a { display: block; perspective: 1500px; }

.ebook-card > a .cover {
  position: relative;
  border-radius: 3px 9px 9px 3px;
  box-shadow:
    11px 16px 30px -14px rgba(31, 51, 41, .55),
    3px 4px 10px -5px rgba(31, 51, 41, .35);
  transition: transform .55s cubic-bezier(.2, .7, .2, 1),
              box-shadow .55s cubic-bezier(.2, .7, .2, 1);
}

/* camadas: imagem no fundo, lombada/páginas no meio, texto na frente */
.ebook-card > a .cover img { z-index: 1; }
.ebook-card > a .cover::before,
.ebook-card > a .cover::after { z-index: 2; pointer-events: none; }
.ebook-card > a .cover__frame,
.ebook-card > a .cover__leaf,
.ebook-card > a .cover__title,
.ebook-card > a .cover__author { position: relative; z-index: 3; }

/* lombada: sombra do vinco à esquerda */
.ebook-card > a .cover::before {
  content: ""; position: absolute; inset: 0 auto 0 0; width: 11%;
  background: linear-gradient(90deg, rgba(0,0,0,.34), rgba(0,0,0,.12) 55%, rgba(0,0,0,0));
  border-radius: 3px 0 0 3px;
}
/* corte das páginas à direita */
.ebook-card > a .cover::after {
  content: ""; position: absolute; top: 3%; bottom: 3%; right: 0; width: 6px;
  background: repeating-linear-gradient(90deg, #fbf9f3 0 1px, #cfc9ba 1px 2.5px);
}

@media (prefers-reduced-motion: no-preference) {
  .ebook-card > a .cover { transform: rotateY(-21deg); }
  .ebook-card > a:hover .cover,
  .ebook-card > a:focus-visible .cover {
    transform: rotateY(-7deg) translateY(-8px);
    box-shadow:
      20px 26px 46px -16px rgba(31, 51, 41, .60),
      4px 6px 14px -6px rgba(31, 51, 41, .42);
  }
}

/* ---- Card: leve elevação ---- */
.ebook-card { transition: box-shadow .25s ease, transform .3s cubic-bezier(.2, .7, .2, 1); }
.ebook-card:hover { transform: translateY(-4px); }

/* ---- Botão comprar/obter: brilho sutil ao passar o mouse ---- */
.btn--cart { position: relative; overflow: hidden; }
.btn--cart::after {
  content: ""; position: absolute; top: 0; left: -60%; width: 40%; height: 100%;
  background: linear-gradient(100deg, transparent, rgba(255,255,255,.28), transparent);
  transform: skewX(-18deg); transition: left .6s ease;
}
.btn--cart:hover::after { left: 130%; }

/* ---- Revelação ao rolar ---- */
@media (prefers-reduced-motion: no-preference) {
  .reveal { opacity: 0; transform: translateY(20px);
    transition: opacity .6s ease, transform .6s cubic-bezier(.2, .7, .2, 1); }
  .reveal.is-in { opacity: 1; transform: none; }
}