.volantino-page {
  min-height: 100vh;
  background:
    radial-gradient(circle at 12% 8%, rgba(216, 177, 107, 0.2), transparent 26%),
    radial-gradient(circle at 88% 12%, rgba(190, 24, 50, 0.13), transparent 30%),
    linear-gradient(180deg, #f8f4ee 0%, #efe8dd 100%);
}

.volantino-header,
.volantino-main {
  width: min(calc(100% - 24px), var(--container));
  margin-inline: auto;
}

.volantino-header {
  position: sticky;
  top: 12px;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-top: 12px;
  padding: 14px 18px;
  border: 1px solid rgba(255, 255, 255, 0.55);
  border-radius: 26px;
  background: rgba(255, 255, 255, 0.76);
  box-shadow: 0 18px 50px rgba(15, 18, 23, 0.08);
  backdrop-filter: blur(18px);
}

.volantino-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.volantino-nav a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 14px;
  border-radius: 999px;
  color: var(--text-soft);
  font-weight: 800;
  text-decoration: none;
}

.volantino-nav a:hover,
.volantino-nav a:focus-visible,
.volantino-nav .is-primary {
  background: #fff;
  color: var(--accent);
}

.volantino-main {
  padding: 28px 0 42px;
}

.volantino-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: end;
  padding: 34px;
  border: 1px solid rgba(255, 255, 255, 0.64);
  border-radius: 34px;
  background:
    radial-gradient(circle at top right, rgba(190, 24, 50, 0.1), transparent 28%),
    rgba(255, 255, 255, 0.68);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(18px);
}

.volantino-hero h1 {
  max-width: 18ch;
  margin: 18px 0 0;
  font-family: "Sora", sans-serif;
  font-size: clamp(2.5rem, 5vw, 5.3rem);
  line-height: 0.98;
  letter-spacing: -0.055em;
}

.volantino-hero .eyebrow {
  border-color: rgba(190, 24, 50, 0.14);
  background: rgba(190, 24, 50, 0.08);
  color: var(--accent);
}

.volantino-hero p {
  max-width: 68ch;
  margin: 20px 0 0;
  color: var(--text-soft);
  font-size: 1.05rem;
  line-height: 1.7;
}

.volantino-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 12px;
}

.cta-outline-dark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 54px;
  padding: 0 22px;
  border: 1px solid rgba(21, 25, 34, 0.12);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.6);
  color: var(--text);
  font-weight: 800;
  text-decoration: none;
  transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
}

.cta-outline-dark:hover,
.cta-outline-dark:focus-visible {
  transform: translateY(-3px);
  background: #fff;
  box-shadow: 0 20px 45px rgba(15, 18, 23, 0.1);
}

.viewer-shell {
  margin-top: 24px;
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.68);
  border-radius: 34px;
  background:
    radial-gradient(circle at 20% 0%, rgba(216, 177, 107, 0.12), transparent 26%),
    linear-gradient(140deg, rgba(15, 18, 23, 0.98), rgba(42, 25, 30, 0.96));
  box-shadow: 0 34px 100px rgba(15, 18, 23, 0.2);
}

.viewer-shell:fullscreen {
  overflow: auto;
  padding: 18px;
  background: linear-gradient(140deg, rgba(15, 18, 23, 0.99), rgba(42, 25, 30, 0.98));
}

.viewer-shell.is-pdf-mode {
  max-width: 1040px;
  margin-inline: auto;
}

.viewer-shell.is-pdf-mode .viewer-toolbar,
.viewer-shell.is-pdf-mode .flipbook-stage,
.viewer-shell.is-pdf-mode .page-range-wrap,
.viewer-shell.is-pdf-mode .viewer-hints {
  display: none;
}

.viewer-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.toolbar-group {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
}

.toolbar-group strong {
  min-width: 120px;
  text-align: center;
  font-family: "Sora", sans-serif;
}

.tool-button {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 15px;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.25s ease, background 0.25s ease, border-color 0.25s ease;
}

.tool-button:hover,
.tool-button:focus-visible {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.24);
  background: rgba(255, 255, 255, 0.14);
}

.tool-button:disabled {
  cursor: not-allowed;
  opacity: 0.36;
  transform: none;
}

.flipbook-stage {
  position: relative;
  display: grid;
  place-items: center;
  min-height: clamp(680px, 88vh, 1120px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 28px;
  background:
    radial-gradient(circle at center, rgba(255, 255, 255, 0.08), transparent 45%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
  overflow: hidden;
  perspective: 1600px;
  touch-action: pan-y;
}

.flipbook-stage.is-zoomed {
  cursor: grab;
  touch-action: none;
}

.flipbook-stage.is-zoomed:active {
  cursor: grabbing;
}

.book {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  width: min(100%, var(--book-fit-width, 1320px));
  max-height: none;
  padding: 22px;
  --viewer-zoom: 1;
  --pan-x: 0px;
  --pan-y: 0px;
  transform: translate3d(var(--pan-x), var(--pan-y), 0) scale(var(--viewer-zoom));
  transform-origin: center center;
  transform-style: preserve-3d;
  transition: transform 0.2s ease;
  will-change: transform;
}

.book.is-interacting {
  transition: none;
}

.book::before {
  content: "";
  position: absolute;
  top: 38px;
  bottom: 38px;
  left: 50%;
  width: 1px;
  background: linear-gradient(180deg, transparent, rgba(0, 0, 0, 0.24), transparent);
  transform: translateX(-50%);
  z-index: 3;
}

.book.is-single {
  grid-template-columns: minmax(0, 1fr);
  width: min(100%, var(--book-fit-width, 760px));
}

.book.is-single::before {
  display: none;
}

.page-card {
  position: relative;
  display: grid;
  place-items: center;
  aspect-ratio: 210 / 297;
  min-height: 0;
  padding: 0;
  border-radius: 0;
  background:
    linear-gradient(90deg, rgba(15, 18, 23, 0.05), transparent 16%),
    #fff;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.24);
  overflow: hidden;
  backface-visibility: hidden;
  transform-style: preserve-3d;
  cursor: zoom-in;
}

.page-card::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(0, 0, 0, 0.2), transparent 22%, transparent 78%, rgba(0, 0, 0, 0.12)),
    radial-gradient(circle at 50% 50%, transparent 54%, rgba(0, 0, 0, 0.12));
  opacity: 0;
  transition: opacity 0.2s ease;
}

.page-card img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 0;
  user-select: none;
  -webkit-user-drag: none;
}

.book.is-zoomed .page-card {
  cursor: grab;
}

.book.is-zoomed .page-card img {
  pointer-events: none;
}

.page-card.is-empty {
  opacity: 0.55;
}

.page-card.is-empty::after {
  content: "Fine volantino";
  color: var(--text-soft);
  font-family: "Sora", sans-serif;
  font-weight: 800;
}

.page-card.is-empty img {
  display: none;
}

.page-label {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 4;
  padding: 7px 10px;
  border-radius: 999px;
  background: rgba(15, 18, 23, 0.78);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.book.turn-next .page-right,
.book.turn-next.is-single .page-left {
  transform-origin: left center;
  z-index: 12;
  animation: flipNext 0.72s cubic-bezier(0.18, 0.78, 0.2, 1);
}

.book.turn-next.is-single .page-left {
  transform-origin: right center;
}

.book.turn-prev .page-left {
  transform-origin: right center;
  z-index: 12;
  animation: flipPrev 0.72s cubic-bezier(0.18, 0.78, 0.2, 1);
}

.book.turn-next .page-right::before,
.book.turn-next.is-single .page-left::before,
.book.turn-prev .page-left::before {
  animation: pageShade 0.72s ease both;
}

.stage-arrow {
  position: absolute;
  top: 50%;
  z-index: 5;
  display: grid;
  place-items: center;
  width: 54px;
  height: 72px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  cursor: pointer;
  transform: translateY(-50%);
  backdrop-filter: blur(12px);
  transition: transform 0.25s ease, background 0.25s ease, opacity 0.25s ease;
}

.stage-arrow:hover,
.stage-arrow:focus-visible {
  background: rgba(255, 255, 255, 0.18);
  transform: translateY(-50%) scale(1.03);
}

.stage-arrow:disabled {
  opacity: 0.28;
  cursor: not-allowed;
}

.stage-arrow-left {
  left: 16px;
}

.stage-arrow-right {
  right: 16px;
}

.viewer-loader {
  position: absolute;
  inset: 0;
  z-index: 8;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 16px;
  background: rgba(15, 18, 23, 0.74);
  color: #fff;
  text-align: center;
}

.viewer-loader.is-hidden {
  display: none;
}

.viewer-loader span {
  width: 46px;
  height: 46px;
  border: 4px solid rgba(255, 255, 255, 0.18);
  border-top-color: var(--gold);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}

.page-range-wrap {
  padding: 18px 4px 8px;
}

.page-range-wrap input {
  width: 100%;
  accent-color: var(--accent);
}

.viewer-hints {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 8px 4px 2px;
  color: rgba(255, 255, 255, 0.68);
  font-size: 0.9rem;
}

.viewer-hints span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
}

.fallback-panel {
  margin-top: 18px;
  padding: 24px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.95);
}

.viewer-shell.is-pdf-mode .fallback-panel {
  margin-top: 0;
}

.fallback-panel h2 {
  margin: 0;
  font-family: "Sora", sans-serif;
}

.fallback-panel p {
  color: var(--text-soft);
  line-height: 1.65;
}

.fallback-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 16px 0;
}

.pdf-fallback {
  width: 100%;
  height: min(88vh, 1120px);
  min-height: 720px;
  border: 0;
  border-radius: 18px;
  background: #fff;
}

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

@keyframes flipNext {
  0% {
    transform: rotateY(0deg) translateX(0) scale(1);
    filter: brightness(1);
  }
  48% {
    transform: rotateY(-82deg) translateX(-18px) scale(0.985);
    filter: brightness(0.78);
  }
  100% {
    transform: rotateY(0deg) translateX(0) scale(1);
    filter: brightness(1);
  }
}

@keyframes flipPrev {
  0% {
    transform: rotateY(0deg) translateX(0) scale(1);
    filter: brightness(1);
  }
  48% {
    transform: rotateY(82deg) translateX(18px) scale(0.985);
    filter: brightness(0.78);
  }
  100% {
    transform: rotateY(0deg) translateX(0) scale(1);
    filter: brightness(1);
  }
}

@keyframes pageShade {
  0%, 100% {
    opacity: 0;
  }
  45%, 58% {
    opacity: 0.72;
  }
}

@media (max-width: 900px) {
  .volantino-header {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 22px;
  }

  .volantino-nav {
    position: absolute;
    top: calc(100% + 8px);
    left: 8px;
    right: 8px;
    display: grid;
    gap: 8px;
    width: auto;
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 20px 50px rgba(15, 18, 23, 0.12);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity 0.22s ease, visibility 0.22s ease, transform 0.22s ease;
  }

  .volantino-header.secondary-menu-open .volantino-nav {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
  }

  .volantino-header .brand-logo-shell {
    width: 34px;
    height: 34px;
  }

  .volantino-header .brand-copy strong {
    max-width: 34vw;
    overflow: hidden;
    font-size: 0.84rem;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .volantino-header .brand-copy small {
    display: none;
  }

  .volantino-header .mobile-home-link {
    display: inline-flex;
  }

  .volantino-header .secondary-menu-toggle {
    display: inline-flex;
  }

  .volantino-hero {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .volantino-actions {
    justify-content: flex-start;
  }

  .viewer-toolbar {
    align-items: stretch;
    flex-direction: column;
  }

  .toolbar-actions {
    justify-content: space-between;
  }
}

@media (max-width: 760px) {
  .volantino-header,
  .volantino-main {
    width: min(calc(100% - 16px), var(--container));
  }

  .volantino-main {
    padding-top: 16px;
  }

  .volantino-hero {
    padding: 26px 18px;
    border-radius: 28px;
  }

  .volantino-hero h1 {
    max-width: none;
    font-size: clamp(2.35rem, 11vw, 3.5rem);
  }

  .volantino-actions,
  .volantino-actions .cta,
  .volantino-actions .cta-outline-dark {
    width: 100%;
  }

  .viewer-shell {
    padding: 12px;
    border-radius: 26px;
  }

  .flipbook-stage {
    min-height: min(82vh, 820px);
    border-radius: 22px;
    touch-action: pan-y;
  }

  .book {
    grid-template-columns: 1fr;
    width: min(100%, var(--book-fit-width, 620px));
    max-height: none;
    padding: 14px;
  }

  .book::before,
  .page-right {
    display: none;
  }

  .page-card {
    min-height: 0;
    padding: 0;
    border-radius: 0;
    cursor: default;
  }

  .stage-arrow {
    width: 44px;
    height: 58px;
    border-radius: 16px;
  }

  .stage-arrow-left {
    left: 8px;
  }

  .stage-arrow-right {
    right: 8px;
  }

  .viewer-hints {
    font-size: 0.82rem;
  }

  .viewer-hints span:nth-child(4) {
    display: none;
  }

  .pdf-fallback {
    height: 78vh;
    min-height: 560px;
  }
}

@media (max-width: 430px) {
  .volantino-header {
    top: 8px;
    padding: 10px;
  }

  .volantino-nav a {
    min-height: 40px;
    padding: 0 14px;
    font-size: 0.9rem;
  }

  .toolbar-group {
    justify-content: space-between;
  }

  .toolbar-group strong {
    min-width: auto;
    font-size: 0.9rem;
  }

  .tool-button {
    width: 41px;
    height: 41px;
  }

  .flipbook-stage {
    min-height: 560px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .book.turn-next .page-right,
  .book.turn-next.is-single .page-left,
  .book.turn-prev .page-left,
  .viewer-loader span {
    animation: none !important;
  }
}