/* ============================================
   KKV Library - PDF Reader Styles (Light Theme)
   ============================================ */

.reader-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: #e8e8e8;
  z-index: 9999;
  display: flex;
  flex-direction: column;
}

.reader-toolbar {
  background: #ffffff;
  border-bottom: 1px solid #dddddd;
  padding: 10px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 15px;
  flex-shrink: 0;
  z-index: 10;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
}

.reader-toolbar-left,
.reader-toolbar-center,
.reader-toolbar-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.reader-book-title {
  font-family: "Inter", sans-serif;
  font-size: 0.95rem;
  color: #111111;
  max-width: 400px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-weight: 600;
}

.reader-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 14px;
  background: #f9f9f9;
  border: 1px solid #dddddd;
  border-radius: 4px;
  color: #111111;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: "Inter", sans-serif;
  font-size: 0.85rem;
  gap: 6px;
  white-space: nowrap;
}

.reader-btn:hover {
  background: #e8e8e8;
  border-color: #A4A4A4;
}

.reader-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.reader-btn-icon {
  font-size: 1rem;
}

.reader-page-info {
  color: #636363;
  font-family: "Inter", sans-serif;
  font-size: 0.85rem;
  padding: 0 10px;
}

.reader-zoom-controls {
  display: flex;
  align-items: center;
  gap: 5px;
}

.reader-zoom-controls input[type="range"] {
  width: 100px;
  accent-color: #111111;
}

.reader-body {
  flex: 1;
  overflow: auto;
  position: relative;
  background: #e8e8e8;
}

.reader-body.zoomed {
  overflow: auto;
}

/* ========== FLIPBOOK ========== */
.flipbook-viewport {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 400px;
}

.flipbook-scale {
  position: relative;
  transform-origin: center center;
  transition: transform 0.25s ease;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.25);
  border-radius: 2px;
}

.reader-body.zoomed .flipbook-viewport {
  align-items: flex-start;
}
.reader-body.zoomed .flipbook-scale {
  transform-origin: top center;
  margin: 0 auto;
}

#flipbook {
  width: 100%;
  height: 100%;
}

/* A single flipbook page */
.flip-page {
  background: #ffffff;
  overflow: hidden;
  position: relative;
}

.flip-page-inner {
  width: 100%;
  height: 100%;
  position: relative;
  background: #ffffff;
}

.flip-page-inner img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  background: #ffffff;
}

.flip-page-loading {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: #A4A4A4;
  font-size: 1.4rem;
}

.flip-page-num {
  position: absolute;
  bottom: 6px;
  left: 50%;
  transform: translateX(-50%);
  font-family: "Inter", sans-serif;
  font-size: 0.65rem;
  color: #A4A4A4;
  pointer-events: none;
}

/* Page inner shadow near the spine (applied by PageFlip via its own styles) */
.stf__parent {
  margin: 0 auto;
}
.stf__block {
  background: #ffffff;
}

/* Edge click zones */
.flip-edge {
  position: absolute;
  top: 15%;
  height: 70%;
  width: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #636363;
  font-size: 1.4rem;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.2s ease, background 0.2s ease;
  z-index: 5;
  border-radius: 4px;
}

.reader-body:hover .flip-edge {
  opacity: 0.55;
}

.flip-edge:hover {
  opacity: 1 !important;
  background: rgba(255, 255, 255, 0.75);
  color: #111111;
}

.flip-edge-left {
  left: 8px;
}

.flip-edge-right {
  right: 8px;
}

/* Legacy canvas viewer (unused, kept for reference) */
.reader-body canvas {
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
  max-width: 100%;
  height: auto;
}

.reader-loading {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  color: #636363;
}

.reader-loading .loading-spinner {
  width: 50px;
  height: 50px;
  border: 3px solid #dddddd;
  border-top-color: #111111;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 15px;
}

.reader-error {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  color: #636363;
  max-width: 400px;
}

.reader-error .error-icon {
  font-size: 3rem;
  margin-bottom: 15px;
  display: block;
}

/* Fullscreen mode */
.reader-container.fullscreen {
  position: fixed;
}

.reader-container.fullscreen .reader-toolbar {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 10;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.reader-container.fullscreen:hover .reader-toolbar,
.reader-container.fullscreen .reader-toolbar:focus-within {
  opacity: 1;
}

/* Responsive */
@media (max-width: 768px) {
  .reader-toolbar {
    padding: 8px 10px;
    flex-wrap: wrap;
    gap: 8px;
  }

  .reader-book-title {
    max-width: 200px;
    font-size: 0.85rem;
  }

  .reader-btn {
    padding: 6px 10px;
    font-size: 0.8rem;
  }

  .reader-body {
    padding: 10px;
  }

  .hide-mobile {
    display: none !important;
  }
}