/* PDF Flipbook Lightbox */

/* ---------- miniatura no conteúdo ---------- */
.pfb-embed {
  --pfb-w: 260px;
  --pfb-accent: #e8542f;
  display: block;
  width: 100%;
  margin: 1.5em 0;
  text-align: center;
}
.pfb-embed.pfb-align-left { text-align: left; }
.pfb-embed.pfb-align-right { text-align: right; }

.pfb-embed .pfb-card {
  all: unset;
  box-sizing: border-box;
  display: inline-block;
  position: relative;
  width: var(--pfb-w);
  max-width: 100%;
  cursor: pointer;
  text-align: left;
  border-radius: 6px;
  transition: transform .25s ease;
}
.pfb-embed .pfb-card:hover { transform: translateY(-4px); }
.pfb-embed .pfb-card:focus-visible { outline: 3px solid var(--pfb-accent); outline-offset: 4px; }

.pfb-embed .pfb-book3d {
  display: block;
  position: relative;
  perspective: 1100px;
}
.pfb-embed .pfb-inner { /* página interna, revelada quando a capa abre */
  position: absolute;
  inset: 0;
  z-index: 0;
  background: linear-gradient(90deg, rgba(0,0,0,.16) 0, rgba(0,0,0,.04) 7%, transparent 14%), #fff;
  border-radius: 0 5px 5px 0;
  box-shadow: 2px 0 0 #f3f3f3, 4px 0 0 #e1e1e1, 0 14px 28px -10px rgba(0,0,0,.4);
}
.pfb-embed .pfb-cover {
  display: block;
  position: relative;
  z-index: 1;
  aspect-ratio: 3 / 4;
  background: #f1f1f1;
  border-radius: 3px 7px 7px 3px;
  overflow: hidden;
  transform-origin: left center;
  box-shadow: 0 1px 2px rgba(0,0,0,.22), 0 14px 28px -10px rgba(0,0,0,.4);
  transition: transform .5s cubic-bezier(.2,.7,.2,1), box-shadow .5s ease;
}
@media (hover: hover) {
  .pfb-embed .pfb-card:hover .pfb-cover,
  .pfb-embed .pfb-card:focus-visible .pfb-cover {
    transform: rotateY(-28deg);
    box-shadow: 8px 6px 18px -6px rgba(0,0,0,.45);
  }
}
.pfb-embed .pfb-cover::after { /* lombada */
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(0,0,0,.22) 0, rgba(255,255,255,.28) 2.5%, rgba(0,0,0,.06) 4%, transparent 9%);
  pointer-events: none;
}
.pfb-embed .pfb-cover-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.pfb-embed .pfb-cover.is-loading {
  background: linear-gradient(100deg, #ececec 30%, #f8f8f8 50%, #ececec 70%) 0 0 / 200% 100%;
  animation: pfb-shimmer 1.4s linear infinite;
}
.pfb-embed .pfb-cover.is-error::before {
  content: "PDF";
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  font: 700 28px/1 system-ui, sans-serif;
  color: #999;
}

.pfb-embed .pfb-cta {
  position: absolute;
  left: 50%; bottom: 14px;
  z-index: 3;
  transform: translate(-50%, 8px);
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 16px;
  border-radius: 999px;
  background: var(--pfb-accent);
  color: #fff;
  font: 600 14px/1 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  white-space: nowrap;
  box-shadow: 0 6px 16px rgba(0,0,0,.3);
  opacity: 0;
  transition: opacity .2s ease, transform .2s ease;
}
.pfb-embed .pfb-card:hover .pfb-cta,
.pfb-embed .pfb-card:focus-visible .pfb-cta { opacity: 1; transform: translate(-50%, 0); }
@media (hover: none) {
  .pfb-embed .pfb-cta { opacity: 1; transform: translate(-50%, 0); }
}

.pfb-embed .pfb-caption {
  display: block;
  max-width: var(--pfb-w);
  margin: .7em auto 0;
  color: var(--pfb-caption-color, inherit);
  font-weight: var(--pfb-caption-weight, 600);
  font-size: var(--pfb-caption-size, .95em);
  line-height: 1.35;
}
.pfb-embed.pfb-align-left .pfb-caption { margin-left: 0; }
.pfb-embed.pfb-align-right .pfb-caption { margin-right: 0; }

@keyframes pfb-shimmer { to { background-position: -200% 0; } }
@keyframes pfb-spin { to { transform: rotate(360deg); } }

/* ---------- lightbox ---------- */
html.pfb-lock,
html.pfb-lock body { overflow: hidden !important; }

.pfb-lightbox {
  --pfb-accent: #e8542f;
  position: fixed;
  inset: 0;
  z-index: 2147483000;
  display: flex;
  flex-direction: column;
  background: radial-gradient(ellipse at 50% 40%, #2a2e37 0, #15171c 70%);
  color: #fff;
  font: 14px/1.4 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-tap-highlight-color: transparent;
}
.pfb-lightbox[hidden] { display: none; }
.pfb-lightbox *, .pfb-lightbox *::before, .pfb-lightbox *::after { box-sizing: border-box; }

.pfb-lightbox .pfb-bar {
  flex: none;
  display: flex;
  align-items: center;
  gap: 4px;
  min-height: 52px;
  padding: 6px 10px;
  background: rgba(8, 9, 12, .55);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.pfb-lightbox .pfb-top { padding-top: max(6px, env(safe-area-inset-top)); }
.pfb-lightbox .pfb-bottom {
  justify-content: center;
  gap: 6px;
  padding-bottom: max(6px, env(safe-area-inset-bottom));
}
.pfb-lightbox .pfb-title {
  flex: 1;
  min-width: 0;
  padding: 0 8px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.pfb-lightbox .pfb-btn {
  all: unset;
  box-sizing: border-box;
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  color: #fff;
  cursor: pointer;
  transition: background .15s ease;
}
.pfb-lightbox .pfb-btn[hidden] { display: none; }
.pfb-lightbox .pfb-btn:hover { background: rgba(255,255,255,.14); }
.pfb-lightbox .pfb-btn:focus-visible { outline: 2px solid var(--pfb-accent); outline-offset: 1px; }
.pfb-lightbox .pfb-btn[disabled] { opacity: .3; cursor: default; background: none; }

.pfb-lightbox .pfb-pager { display: inline-flex; align-items: center; gap: 8px; margin: 0 6px; color: rgba(255,255,255,.75); }
.pfb-lightbox input.pfb-page-input {
  width: 84px;
  height: 36px;
  margin: 0;
  padding: 0 8px;
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 8px;
  background: rgba(255,255,255,.1);
  color: #fff;
  font: inherit;
  font-weight: 600;
  text-align: center;
  box-shadow: none;
}
.pfb-lightbox input.pfb-page-input:focus { outline: 2px solid var(--pfb-accent); outline-offset: 1px; background: rgba(255,255,255,.16); }

/* palco */
.pfb-lightbox .pfb-stage { position: relative; flex: 1; min-height: 0; overflow: hidden; }
.pfb-lightbox .pfb-book {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
}
.pfb-lightbox .pfb-pages { flex: none; position: relative; }

.pfb-lightbox .pfb-status {
  position: absolute; left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  display: none;
  padding: 12px 18px;
  border-radius: 10px;
  background: rgba(0,0,0,.6);
  text-align: center;
  white-space: pre-wrap;
  max-width: 90%;
  pointer-events: none;
}
.pfb-lightbox .pfb-status.is-on { display: block; }
.pfb-lightbox .pfb-status.is-error { background: #7a1f12; }

/* páginas */
.pfb-lightbox .pfb-page { background: #fff; overflow: hidden; }
.pfb-lightbox .pfb-content { position: relative; width: 100%; height: 100%; background: #fff; }
.pfb-lightbox .pfb-content canvas { display: block; width: 100%; height: 100%; }
.pfb-lightbox .pfb-content.is-loading::before {
  content: "";
  position: absolute; left: 50%; top: 50%;
  width: 30px; height: 30px; margin: -15px 0 0 -15px;
  border: 3px solid rgba(0,0,0,.12);
  border-top-color: var(--pfb-accent);
  border-radius: 50%;
  animation: pfb-spin .8s linear infinite;
}
.pfb-lightbox .pfb-content::after { /* dobra central: só a página direita recebe o degradê */
  content: "";
  position: absolute; top: 0; bottom: 0; left: 0;
  width: 7%;
  pointer-events: none;
  display: none;
}
.pfb-lightbox .pfb-content[data-side="right"]::after {
  display: block;
  background: linear-gradient(90deg, rgba(0,0,0,.13), rgba(0,0,0,.04) 45%, transparent);
}

/* links do PDF original */
.pfb-lightbox .pfb-links { position: absolute; inset: 0; z-index: 1; }
.pfb-lightbox .pfb-link {
  position: absolute;
  display: block;
  cursor: pointer;
  border-radius: 2px;
  transition: background .12s ease;
}
.pfb-lightbox .pfb-link:hover { background: rgba(255, 196, 0, .2); }
.pfb-lightbox .pfb-link:focus-visible { outline: 2px solid var(--pfb-accent); }

/* índice */
.pfb-lightbox .pfb-scrim {
  position: absolute; inset: 0; z-index: 4;
  background: rgba(0,0,0,.5);
  opacity: 0; pointer-events: none;
  transition: opacity .25s ease;
}
.pfb-lightbox .pfb-toc {
  position: absolute; z-index: 5;
  top: 0; bottom: 0; left: 0;
  width: min(400px, 100%);
  display: flex; flex-direction: column;
  background: #1c1f26;
  box-shadow: 6px 0 30px rgba(0,0,0,.45);
  transform: translateX(-104%);
  visibility: hidden;
  transition: transform .28s ease, visibility 0s linear .28s;
}
.pfb-lightbox.pfb-toc-open .pfb-scrim { opacity: 1; pointer-events: auto; }
.pfb-lightbox.pfb-toc-open .pfb-toc { transform: none; visibility: visible; transition: transform .28s ease; }

.pfb-lightbox .pfb-toc-head {
  flex: none;
  display: flex; align-items: center; justify-content: space-between;
  padding: max(8px, env(safe-area-inset-top)) 8px 8px 18px;
  border-bottom: 1px solid rgba(255,255,255,.1);
  font-size: 16px;
}
.pfb-lightbox .pfb-toc-body { flex: 1; overflow: auto; padding: 8px 8px max(16px, env(safe-area-inset-bottom)); -webkit-overflow-scrolling: touch; }
.pfb-lightbox .pfb-toc-empty { padding: 12px 10px; color: rgba(255,255,255,.65); }
.pfb-lightbox .pfb-toc ul { list-style: none; margin: 0; padding: 0; }
.pfb-lightbox .pfb-toc li > ul { display: none; padding-left: 18px; }
.pfb-lightbox .pfb-toc li.is-open > ul { display: block; }
.pfb-lightbox .pfb-toc li { margin: 0; padding: 0; }
.pfb-lightbox .pfb-toc-row { display: flex; align-items: stretch; }

.pfb-lightbox .pfb-toc-toggle {
  all: unset;
  box-sizing: border-box;
  flex: none;
  width: 28px;
  display: inline-flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,.7);
  cursor: pointer;
  border-radius: 6px;
}
.pfb-lightbox .pfb-toc-toggle.is-empty { cursor: default; }
.pfb-lightbox .pfb-toc-toggle svg { transition: transform .15s ease; }
.pfb-lightbox .pfb-toc li.is-open > .pfb-toc-row > .pfb-toc-toggle svg { transform: rotate(90deg); }
.pfb-lightbox .pfb-toc-toggle:not(.is-empty):hover { background: rgba(255,255,255,.1); }
.pfb-lightbox .pfb-toc-toggle:focus-visible,
.pfb-lightbox .pfb-toc-link:focus-visible { outline: 2px solid var(--pfb-accent); outline-offset: -2px; }

.pfb-lightbox .pfb-toc-link {
  all: unset;
  box-sizing: border-box;
  flex: 1;
  min-width: 0;
  display: flex; align-items: baseline; justify-content: space-between; gap: 12px;
  padding: 10px 10px;
  border-radius: 8px;
  color: #fff;
  cursor: pointer;
  line-height: 1.35;
}
.pfb-lightbox .pfb-toc-link:hover { background: rgba(255,255,255,.1); }
.pfb-lightbox .pfb-toc-text { flex: 1; min-width: 0; overflow-wrap: anywhere; }
.pfb-lightbox .pfb-toc-num { flex: none; color: rgba(255,255,255,.55); font-variant-numeric: tabular-nums; }

/* celular */
@media (max-width: 820px) {
  .pfb-lightbox .pfb-btn { width: 44px; height: 44px; }
}

@media (prefers-reduced-motion: reduce) {
  .pfb-embed *, .pfb-lightbox * { transition: none !important; animation: none !important; }
}

/* modo depuração (?pfbdebug=1) */
.pfb-debug {
  position: fixed; left: 0; right: 0; bottom: 0;
  z-index: 2147483647;
  max-height: 45vh; overflow: auto;
  margin: 0; padding: 8px 10px;
  background: rgba(0,0,0,.88);
  color: #9fef9f;
  font: 11px/1.35 ui-monospace, Menlo, Consolas, monospace;
  white-space: pre-wrap; word-break: break-all;
}