/* Revista online — flipbook (maior) */
.flip-page {
  min-height: 100vh;
}

.flip-main {
  padding-bottom: 2rem;
}

.flip-intro {
  padding: 1.1rem 0 0.25rem;
  text-align: center;
}

.flip-intro h1 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  line-height: 1.1;
}

.flip-intro p {
  margin: 0 auto;
  max-width: 34rem;
  color: var(--muted);
  line-height: 1.45;
  font-size: 0.95rem;
}

.flip-stage {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.5rem var(--gutter) 0.25rem;
  max-width: 1680px;
  margin: 0 auto;
  width: 100%;
}

.flip-book-wrap {
  position: relative;
  flex: 1;
  min-width: 0;
  display: flex;
  justify-content: center;
  align-items: stretch;
  min-height: min(78vh, 820px);
  padding: 0.25rem 0 0.75rem;
}

.flip-zoom-scroll {
  width: 100%;
  height: 100%;
  min-height: inherit;
  overflow: auto;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  -webkit-overflow-scrolling: touch;
}

.flip-zoom-scroll.is-zoomed {
  align-items: flex-start;
  cursor: grab;
}

.flip-zoom-inner {
  --flip-zoom: 1;
  transform: scale(var(--flip-zoom));
  transform-origin: top center;
  transition: transform 0.2s var(--ease, ease);
  width: 100%;
  display: flex;
  justify-content: center;
  padding-bottom: calc((var(--flip-zoom) - 1) * 40%);
}

.flip-book {
  margin: 0 auto;
  width: 100%;
  max-width: 1500px;
  box-shadow:
    0 22px 60px rgba(0, 0, 0, 0.55),
    0 0 0 1px rgba(255, 255, 255, 0.06);
}

.flip-loading {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  z-index: 2;
  pointer-events: none;
  transition: opacity 0.3s;
}

.flip-loading.is-done {
  opacity: 0;
  visibility: hidden;
}

.flip-nav {
  flex: 0 0 auto;
  width: 52px;
  height: 52px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font-size: 1.85rem;
  line-height: 1;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
  z-index: 5;
}

.flip-nav:hover:not(:disabled) {
  border-color: var(--brand);
  color: var(--brand);
  background: var(--brand-soft);
}

.flip-nav:disabled {
  opacity: 0.35;
  cursor: default;
}

.flip-toolbar {
  display: grid;
  gap: 0.85rem;
  padding: 0.35rem 0 1.25rem;
  text-align: center;
}

.flip-toolbar__pages {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.45rem;
}

.flip-toolbar__pages span {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--brand);
}

.flip-toolbar__pages input[type="range"] {
  width: min(100%, 420px);
  accent-color: var(--brand);
}

.flip-toolbar__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.65rem;
}

.flip-hint {
  margin: 0;
  font-size: 0.85rem;
  color: var(--muted);
}

.flip-view-controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.45rem;
}

.flip-ctrl {
  min-width: 44px;
  min-height: 44px;
  padding: 0 0.85rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1.05rem;
  font-weight: 700;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
}

.flip-ctrl:hover:not(:disabled) {
  border-color: var(--brand);
  color: var(--brand);
}

.flip-ctrl:disabled {
  opacity: 0.35;
  cursor: default;
}

.flip-ctrl--label {
  min-width: 4.5rem;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
}

.flip-ctrl--wide {
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding-inline: 1rem;
}

.flip-ctrl--accent {
  background: var(--brand);
  border-color: var(--brand);
  color: #111;
}

.flip-ctrl--accent:hover:not(:disabled) {
  filter: brightness(1.05);
  color: #111;
  border-color: var(--brand);
}

/* Fullscreen / immersive */
.flip-stage:fullscreen,
.flip-stage:-webkit-full-screen {
  background: #0c0e10;
  max-width: none;
  width: 100%;
  height: 100%;
  padding: 1rem;
  box-sizing: border-box;
}

.flip-stage:fullscreen .flip-book-wrap,
.flip-stage:-webkit-full-screen .flip-book-wrap {
  min-height: calc(100vh - 2rem);
}

body.is-flip-fs .site-header,
body.is-flip-fs .flip-intro,
body.is-flip-fs .site-footer,
body.is-flip-fs .flip-toolbar__actions {
  display: none;
}

body.is-flip-fs .flip-stage {
  max-width: none;
  min-height: calc(100vh - 5rem);
  padding-top: 0.5rem;
}

body.is-flip-fs .flip-book-wrap {
  min-height: calc(100vh - 8rem);
}

body.is-flip-fs .flip-toolbar {
  position: sticky;
  bottom: 0;
  z-index: 20;
  padding: 0.75rem var(--gutter) 1rem;
  background: rgba(12, 14, 16, 0.94);
  border-top: 1px solid var(--border);
}

/* Página ampliada para leitura */
.flip-reader {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  flex-direction: column;
  background: rgba(8, 10, 12, 0.97);
}

.flip-reader[hidden] {
  display: none !important;
}

.flip-reader__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg-elevated);
}

.flip-reader__bar span {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--brand);
}

.flip-reader__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.flip-reader__viewport {
  flex: 1;
  overflow: auto;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 1rem;
  -webkit-overflow-scrolling: touch;
}

.flip-reader__viewport img {
  width: auto;
  max-width: none;
  height: auto;
  min-width: min(100%, 1489px);
  width: min(100%, 1489px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
}

@media (min-width: 1100px) {
  .flip-reader__viewport img {
    width: min(96vw, 1600px);
  }
}

.flip-book .stf__parent,
.flip-book .stf__wrapper {
  margin: 0 auto;
}

.flip-book canvas {
  max-width: 100%;
}

@media (max-width: 900px) {
  .flip-book-wrap {
    min-height: min(70vh, 640px);
  }
}

@media (max-width: 720px) {
  .flip-intro {
    padding-top: 0.85rem;
  }

  .flip-stage {
    gap: 0.2rem;
    padding-inline: 0.25rem;
    max-width: none;
  }

  .flip-nav {
    width: 44px;
    height: 44px;
    font-size: 1.5rem;
  }

  .flip-book-wrap {
    min-height: min(68vh, 520px);
  }

  .flip-book {
    max-width: none;
  }

  .flip-toolbar__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .flip-toolbar__actions .btn {
    width: 100%;
  }

  .flip-view-controls {
    gap: 0.35rem;
  }

  .flip-ctrl--wide {
    flex: 1 1 calc(50% - 0.35rem);
  }

  .flip-hint {
    font-size: 0.8rem;
  }

  .flip-reader__viewport img {
    min-width: 100%;
    width: 140%;
    max-width: none;
  }
}

@media (max-width: 480px) {
  .flip-stage {
    flex-wrap: wrap;
  }

  .flip-book-wrap {
    order: 0;
    width: 100%;
    min-height: min(58vh, 420px);
  }

  .flip-nav--prev {
    order: 1;
  }

  .flip-nav--next {
    order: 2;
  }
}