src/activities/reader/EpubReaderActivity.cpp

@@ -255,8 +255,9 @@ void EpubReaderActivity::jumpToPercent(int percent) {
   // Convert percent into a byte-like absolute position across the spine sizes.
   // Use an overflow-safe computation: (bookSize / 100) * percent + (bookSize % 100) * percent / 100
   size_t targetSize =
-      (bookSize / 100) * static_cast<size_t>(percent) + (bookSize % 100) * static_cast<size_t>(percent) / 100;
-  if (percent >= 100) {
+      (bookSize / 100) * static_cast<size_t>(percent) +
+      (bookSize % 100) * static_cast<size_t>(percent) / 100;
+  if (percent >= 100 && bookSize > 0) {
     // Ensure the final percent lands inside the last spine item.
     targetSize = bookSize - 1;
   }

src/activities/reader/EpubReaderPercentSelectionActivity.cpp

@@ -106,14 +106,14 @@ void EpubReaderPercentSelectionActivity::renderScreen() {
   renderer.drawCenteredText(UI_12_FONT_ID, 15, "Go to Position", true, EpdFontFamily::BOLD);
 
   const std::string percentText = std::to_string(percent) + "%";
-  renderer.drawCenteredText(UI_12_FONT_ID, 90, percentText.c_str(), true, EpdFontFamily::BOLD);
+  renderer.drawCenteredText(UI_12_FONT_ID, 70, percentText.c_str(), true, EpdFontFamily::BOLD);
 
   // Draw slider track.
   const int screenWidth = renderer.getScreenWidth();
   constexpr int barWidth = 360;
   constexpr int barHeight = 16;
   const int barX = (screenWidth - barWidth) / 2;
-  const int barY = 140;
+  const int barY = 120;
 
   renderer.drawRect(barX, barY, barWidth, barHeight);