.reader-page {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.reader-body {
  min-height: 0;
}

.reader-toolbar {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
}

.page-indicator {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.page-input {
  width: 50px;
  padding: 4px 6px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  color: var(--text-primary);
  text-align: center;
}

.toolbar-divider {
  width: 1px;
  height: 24px;
  background: var(--border-color);
  margin: 0 var(--space-xs);
}

#zoom-level {
  font-size: 0.85rem;
  color: var(--text-secondary);
  min-width: 42px;
  text-align: center;
}

.btn-secondary-sm {
  background: var(--bg-secondary);
  color: var(--text-primary);
  padding: 6px 12px;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
}

.btn-secondary-sm:hover {
  background: var(--border-color);
}

.reader-canvas-container {
  flex: 1;
  overflow-x: auto;
  overflow-y: visible;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  display: flex;
  justify-content: center;
  align-items: flex-start;
  min-width: 0;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior-x: contain;
  touch-action: pan-y;
}

@media (max-width: 700px) {
  .reader-toolbar,
  .annotation-toolbar {
    padding: 8px;
    gap: 6px;
    margin-bottom: 10px;
  }
  .toolbar-divider {
    display: none;
  }
  .reader-toolbar .btn-secondary-sm {
    flex: 1 1 auto;
  }
  .reader-canvas-container {
    padding: 12px;
  }
  .reader-body {
    flex-direction: column;
    overflow: visible;
  }
  .annotations-panel {
    width: 100%;
    max-height: 220px;
  }
  .annotation-toolbar {
    overflow-x: auto;
    flex-wrap: nowrap;
    scrollbar-width: thin;
  }
  .annotation-toolbar .toolbar-divider {
    display: block;
    flex: 0 0 1px;
  }
  .ann-tool-btn,
  .annotation-toolbar .color-swatches {
    flex: 0 0 auto;
  }
}

@media (max-width: 480px) {
  .reader-toolbar {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .reader-toolbar .page-indicator {
    justify-content: center;
  }
  .reader-toolbar #fit-width-btn,
  .reader-toolbar #bookmark-page-btn {
    grid-column: span 2;
  }
  .reader-toolbar #zoom-level {
    min-width: 0;
  }
  .reader-canvas-container {
    padding: 8px;
    border-radius: var(--radius-sm);
  }
  .pdf-page-wrapper {
    touch-action: pan-y;
  }
}

#pdf-canvas {
  box-shadow: var(--shadow);
  background: white;
}

body.reader-fullscreen {
  overflow: hidden;
}

body.reader-fullscreen .sidebar,
body.reader-fullscreen .topbar {
  display: none;
}

body.reader-fullscreen .main-column,
body.reader-fullscreen .page-content {
  min-height: 100dvh;
  height: 100dvh;
}

body.reader-fullscreen .page-content {
  max-width: none;
  padding: max(8px, env(safe-area-inset-top))
    max(8px, env(safe-area-inset-right)) max(8px, env(safe-area-inset-bottom))
    max(8px, env(safe-area-inset-left));
  overflow: hidden;
}

body.reader-fullscreen .reader-page {
  height: 100%;
}

body.reader-fullscreen .reader-toolbar,
body.reader-fullscreen .annotation-toolbar {
  flex-shrink: 0;
}

body.reader-fullscreen .reader-body {
  flex: 1;
  overflow: hidden;
  min-height: 0;
}

body.reader-fullscreen .reader-canvas-container {
  overflow: auto;
  min-height: 0;
}

body.reader-fullscreen .annotations-panel {
  display: none;
}

.reader-page:fullscreen {
  width: 100vw;
  height: 100dvh;
  padding: max(8px, env(safe-area-inset-top))
    max(8px, env(safe-area-inset-right)) max(8px, env(safe-area-inset-bottom))
    max(8px, env(safe-area-inset-left));
  overflow: hidden;
  background: var(--bg-secondary);
}

.reader-page:fullscreen .reader-body {
  flex: 1;
  overflow: hidden;
  min-height: 0;
}

.reader-page:fullscreen .reader-canvas-container {
  min-height: 0;
  overflow: auto;
}

.reader-page:fullscreen .annotations-panel {
  display: none;
}

@media (max-width: 700px) {
  body.reader-fullscreen .reader-body {
    overflow: hidden;
  }

  body.reader-fullscreen .annotations-panel {
    flex-shrink: 0;
  }

  body.reader-fullscreen .reader-toolbar,
  .reader-page:fullscreen .reader-toolbar {
    flex-wrap: nowrap;
    overflow-x: auto;
    scrollbar-width: thin;
    -webkit-overflow-scrolling: touch;
  }

  body.reader-fullscreen .reader-toolbar > *,
  .reader-page:fullscreen .reader-toolbar > * {
    flex: 0 0 auto;
  }

  body.reader-fullscreen .annotation-toolbar,
  .reader-page:fullscreen .annotation-toolbar {
    max-height: 52px;
    margin-bottom: 8px;
  }

  body.reader-fullscreen .reader-body,
  .reader-page:fullscreen .reader-body {
    min-height: 0;
    overflow: hidden;
  }

  body.reader-fullscreen .reader-canvas-container,
  .reader-page:fullscreen .reader-canvas-container {
    min-height: 0;
  }
}