/*
 * Stili isolati del visualizzatore.
 * Tutte le regole sono limitate a .flipbook-app, così non modificano il tema
 * del sito che ospita la brochure.
 */

body.flipbook-standalone {
  min-width: 320px;
  margin: 0;
  background: #fff;
}

.brochure-viewer-section {
  width: 100%;
  padding: 0;
  background: #fff;
}

.flipbook-app {
  --flipbook-background: #fff;
  --flipbook-surface: #fff;
  --flipbook-surface-light: #f3f4f6;
  --flipbook-border: #e5e7eb;
  --flipbook-text: #111827;
  --flipbook-muted: #667085;
  --flipbook-accent: #2563eb;
  --flipbook-danger: #e11d48;
  --flipbook-toolbar-height: 64px;
  --flipbook-footer-height: 36px;

  position: relative;
  isolation: isolate;
  display: grid;
  grid-template-rows: var(--flipbook-toolbar-height) minmax(0, 1fr) var(--flipbook-footer-height);
  width: 100%;
  min-width: 0;
  min-height: 640px;
  height: clamp(640px, 100dvh, 1100px);
  overflow: hidden;
  background: var(--flipbook-background);
  color: var(--flipbook-text);
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.flipbook-app,
.flipbook-app *,
.flipbook-app *::before,
.flipbook-app *::after {
  box-sizing: border-box;
}

.flipbook-app:focus-visible {
  outline: 3px solid rgba(96, 165, 250, 0.75);
  outline-offset: -3px;
}

.flipbook-app:fullscreen {
  width: 100vw;
  max-width: none;
  height: 100dvh;
  min-height: 0;
  max-height: none;
  border-radius: 0;
}

.flipbook-app::backdrop {
  background: var(--flipbook-background);
}

.flipbook-app button,
.flipbook-app a {
  -webkit-tap-highlight-color: transparent;
}

.flipbook-app button:focus-visible,
.flipbook-app a:focus-visible {
  outline: 3px solid rgba(96, 165, 250, 0.75);
  outline-offset: 2px;
}

.flipbook-app .toolbar {
  position: relative;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: var(--flipbook-toolbar-height);
  padding: 0 max(14px, env(safe-area-inset-right)) 0 max(14px, env(safe-area-inset-left));
  border-bottom: 1px solid var(--flipbook-border);
  background: var(--flipbook-surface);
  box-shadow: 0 5px 18px rgba(15, 23, 42, 0.06);
}

.flipbook-app .toolbar__brand {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 10px;
  color: var(--flipbook-text);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.flipbook-app .toolbar__brand > span:last-child {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.flipbook-app .toolbar__mark {
  display: grid;
  flex: 0 0 34px;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 10px;
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  box-shadow: 0 8px 18px rgba(37, 99, 235, 0.32);
  color: #fff;
  font-size: 15px;
}

.flipbook-app .toolbar__controls {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 6px;
}

.flipbook-app .toolbar__separator {
  width: 1px;
  height: 24px;
  margin: 0 4px;
  background: var(--flipbook-border);
}

.flipbook-app .icon-button {
  display: inline-grid;
  width: 40px;
  height: 40px;
  padding: 0;
  place-items: center;
  border: 1px solid transparent;
  border-radius: 11px;
  background: transparent;
  color: var(--flipbook-text);
  cursor: pointer;
  text-decoration: none;
  transition: background-color 160ms ease, border-color 160ms ease, opacity 160ms ease;
}

.flipbook-app .icon-button:hover:not(:disabled) {
  border-color: var(--flipbook-border);
  background: var(--flipbook-surface-light);
}

.flipbook-app .icon-button:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.flipbook-app .icon-button svg {
  width: 21px;
  height: 21px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.flipbook-app .page-counter {
  min-width: 112px;
  padding: 0 8px;
  color: var(--flipbook-muted);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  text-align: center;
  white-space: nowrap;
}

.flipbook-app .stage {
  position: relative;
  isolation: isolate;
  display: grid;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  place-items: center;
  padding: 8px;
  background: var(--flipbook-background);
}

.flipbook-app .stage::before {
  display: none;
  content: "";
}

.flipbook-app .book {
  margin: auto;
}

.flipbook-app[data-fit-mode="width"] .stage {
  overflow-x: hidden;
  overflow-y: auto;
  place-items: start center;
  scrollbar-gutter: stable both-edges;
}

.flipbook-app[data-fit-mode="width"] .book {
  margin: 0 auto;
}

.flipbook-app .pdf-page {
  position: relative;
  overflow: hidden;
  background: #fff;
  color: #111827;
  box-shadow: inset 0 0 0 1px rgba(15, 23, 42, 0.08);
}

.flipbook-app .pdf-page canvas {
  display: block;
  width: 100%;
  height: 100%;
  background: #fff;
}

.flipbook-app .page-loader {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: linear-gradient(110deg, #f3f4f6 25%, #fff 45%, #f3f4f6 65%);
  background-size: 250% 100%;
  color: #64748b;
  font-size: 13px;
  animation: flipbook-shimmer 1.5s linear infinite;
}

.flipbook-app .pdf-page.is-rendered .page-loader {
  display: none;
}

.flipbook-app .state-panel {
  position: absolute;
  z-index: 30;
  inset: 0;
  display: flex;
  width: min(90%, 430px);
  margin: auto;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 13px;
  color: var(--flipbook-muted);
  text-align: center;
}

.flipbook-app .state-panel strong {
  color: var(--flipbook-text);
  font-size: 16px;
}

.flipbook-app .state-panel p {
  margin: 0;
  color: var(--flipbook-muted);
  font-size: 14px;
  line-height: 1.55;
}

.flipbook-app .spinner {
  width: 40px;
  height: 40px;
  border: 3px solid rgba(15, 23, 42, 0.12);
  border-top-color: var(--flipbook-accent);
  border-radius: 50%;
  animation: flipbook-spin 750ms linear infinite;
}

.flipbook-app .progress {
  width: min(280px, 72%);
  height: 5px;
  overflow: hidden;
  border-radius: 999px;
  background: #e5e7eb;
}

.flipbook-app .progress span {
  display: block;
  width: 8%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #2563eb, #8b5cf6);
  transition: width 180ms ease;
}

.flipbook-app .state-panel--error code {
  display: block;
  max-width: 100%;
  overflow-wrap: anywhere;
  color: #be123c;
  font-size: 12px;
  line-height: 1.45;
}

.flipbook-app .error-icon {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border: 2px solid rgba(251, 113, 133, 0.65);
  border-radius: 50%;
  color: var(--flipbook-danger);
  font-size: 24px;
  font-weight: 800;
}

.flipbook-app .retry-button {
  min-height: 42px;
  padding: 0 20px;
  border: 1px solid rgba(96, 165, 250, 0.5);
  border-radius: 12px;
  background: #eff6ff;
  color: var(--flipbook-text);
  cursor: pointer;
  font: inherit;
  font-weight: 700;
}

.flipbook-app .viewer-hint {
  display: grid;
  height: var(--flipbook-footer-height);
  place-items: center;
  padding: 0 12px calc(env(safe-area-inset-bottom) / 2);
  background: var(--flipbook-background);
  color: var(--flipbook-muted);
  font-size: 12px;
  text-align: center;
}

.flipbook-app [hidden] {
  display: none !important;
}

@keyframes flipbook-spin {
  to { transform: rotate(360deg); }
}

@keyframes flipbook-shimmer {
  to { background-position: -250% 0; }
}

@media (max-width: 680px) {
  .flipbook-app {
    --flipbook-toolbar-height: 58px;
    --flipbook-footer-height: 32px;
    min-height: 560px;
    height: max(560px, 100dvh);
  }

  .flipbook-app .toolbar {
    gap: 8px;
    padding-right: 8px;
    padding-left: 10px;
  }

  .flipbook-app .toolbar__mark,
  .flipbook-app .toolbar__separator,
  .flipbook-app #open-pdf {
    display: none;
  }

  .flipbook-app .toolbar__brand {
    max-width: 32vw;
    font-size: 13px;
  }

  .flipbook-app .toolbar__controls {
    gap: 2px;
  }

  .flipbook-app .icon-button {
    width: 36px;
    height: 36px;
  }

  .flipbook-app .page-counter {
    min-width: 88px;
    padding: 0 3px;
    font-size: 12px;
  }

  .flipbook-app .stage {
    padding: 10px 6px;
  }

  .flipbook-app .viewer-hint {
    font-size: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .flipbook-app,
  .flipbook-app *,
  .flipbook-app *::before,
  .flipbook-app *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}