/* =========================================================
   MAGAZINE À FEUILLETER — DESIGN CLAIR
   ========================================================= */

.section--viewer {
  position: relative;
  overflow: hidden;
  background: var(--white);
}

.section--viewer::before {
  content: "";
  position: absolute;
  top: 8rem;
  right: -10rem;
  width: 27rem;
  height: 27rem;
  border: 1px solid rgba(239, 43, 34, 0.15);
  border-radius: 50%;
  box-shadow:
    0 0 0 4rem rgba(239, 43, 34, 0.025),
    0 0 0 9rem rgba(239, 43, 34, 0.018);
}

.section--viewer > * {
  position: relative;
  z-index: 1;
}

.flipbook-shell {
  width: min(100%, var(--max-width));
  margin: 0 auto;
}

.viewer__toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0 1rem;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.viewer__counter {
  margin: 0;
  color: var(--muted);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.viewer__controls {
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

.icon-button {
  width: 3.1rem;
  height: 3.1rem;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-strong);
  color: var(--ink);
  background: var(--white);
  cursor: pointer;
  transition:
    color 160ms ease,
    background-color 160ms ease,
    border-color 160ms ease,
    transform 160ms ease;
}

.icon-button:hover {
  color: var(--white);
  border-color: var(--red);
  background: var(--red);
  transform: translateY(-2px);
}

.icon-button:disabled {
  opacity: 0.34;
  cursor: not-allowed;
  transform: none;
}

.flipbook-open-reader {
  width: auto;
  min-height: 3.1rem;
  padding: 0.75rem 1rem;
}

.flipbook-stage {
  position: relative;
  min-height: 38rem;
  display: grid;
  place-items: center;
  overflow: hidden;
  margin-top: 1.4rem;
  padding: 3.2rem clamp(1rem, 4vw, 4rem) 2.5rem;
  border: 1px solid var(--line);
  background:
    linear-gradient(rgba(23, 23, 19, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(23, 23, 19, 0.03) 1px, transparent 1px),
    #ece7dc;
  background-size: 3rem 3rem;
  isolation: isolate;
}

.flipbook-stage::before {
  content: "";
  position: absolute;
  z-index: -2;
  inset: 12% 10%;
  background: radial-gradient(circle at center, rgba(255, 255, 255, 0.8), transparent 65%);
}

.flipbook-stage::after {
  content: "";
  position: absolute;
  z-index: -1;
  right: 14%;
  bottom: 8%;
  left: 14%;
  height: 13%;
  border-radius: 50%;
  background: rgba(48, 39, 26, 0.23);
  filter: blur(1.8rem);
  transform: perspective(20rem) rotateX(68deg);
  pointer-events: none;
}

.flipbook-stage__label {
  position: absolute;
  top: 1.15rem;
  left: 1.3rem;
  color: var(--muted);
  font-size: 0.56rem;
  letter-spacing: 0.11em;
}

.magazine-book {
  margin: 0 auto;
  opacity: 0;
  filter:
    drop-shadow(0 2rem 2.5rem rgba(39, 34, 25, 0.22))
    drop-shadow(0 0.2rem 0.2rem rgba(39, 34, 25, 0.15));
  transition: opacity 260ms ease;
}

.magazine-book.is-ready {
  opacity: 1;
}

.flip-page {
  overflow: hidden;
  color: var(--ink);
  background: var(--paper);
}

.flip-page::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid rgba(0, 0, 0, 0.1);
  pointer-events: none;
}

.flip-page img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  user-select: none;
  -webkit-user-drag: none;
  pointer-events: none;
}

.flipbook-loading {
  position: absolute;
  z-index: 8;
  margin: 0;
  color: var(--muted);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.flipbook-loading[hidden] {
  display: none;
}

.flipbook-hint {
  margin: 1rem 0 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  color: var(--muted);
  font-size: 0.72rem;
  text-align: center;
}

.flipbook-hint span {
  color: var(--red);
  font-size: 1rem;
}

.stf__parent,
.stf__wrapper,
.stf__block {
  cursor: grab;
}

.stf__parent:active,
.stf__wrapper:active {
  cursor: grabbing;
}

@media (max-width: 900px) {
  .flipbook-stage {
    min-height: 38rem;
  }
}

@media (max-width: 720px) {
  .viewer__toolbar {
    align-items: flex-start;
  }

  .flipbook-controls {
    gap: 0.35rem;
  }

  .flipbook-open-reader {
    padding: 0.7rem 0.8rem;
    font-size: 0.62rem;
  }

  .flipbook-stage {
    min-height: clamp(31rem, 142vw, 48rem);
    padding: 2.6rem 0.3rem 1rem;
  }

  .flipbook-stage__label {
    left: 0.8rem;
  }

  .flipbook-hint {
    justify-content: flex-start;
    text-align: left;
  }
}

@media (max-width: 430px) {
  .viewer__counter {
    max-width: 4.8rem;
    line-height: 1.35;
  }

  .icon-button {
    width: 2.8rem;
    height: 2.8rem;
  }

  .flipbook-open-reader {
    min-height: 2.8rem;
  }
}