#pdfViewer {
  max-width: 1100px;
  margin: 0 auto;
  border: 1px solid #d0d0d0;
  background: #e5e5e5;
}

/* ===== Toolbar ===== */
.pdf-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;

  padding: 4px 6px;
  background: #f2f2f2;
  border-bottom: 1px solid #c8c8c8;

  position: sticky;
  top: 0;
  z-index: 10;
}

.pdf-toolbar-left,
.pdf-toolbar-center,
.pdf-toolbar-right {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ===== Buttons ===== */
.pdf-btn {
  min-width: 28px;
  height: 28px;
  padding: 0 6px;

  background: #fff;
  border: 1px solid #bfbfbf;
  border-radius: 2px;

  font-size: 14px;
  cursor: pointer;
}

.pdf-btn:hover:not(:disabled) {
  background: #e6e6e6;
}

.pdf-btn:disabled {
  opacity: 0.4;
  cursor: default;
}

/* ===== Page input ===== */
.pdf-page {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 13px;
}

#page_input {
  width: 48px;
  height: 26px;
  text-align: center;
  border: 1px solid #bfbfbf;
  border-radius: 2px;
}

/* ===== Zoom ===== */
.pdf-zoom {
  min-width: 48px;
  text-align: center;
  font-size: 13px;
}

/* ===== Stage ===== */
#stage {
  height: 80vh;
  overflow: auto;
  background: #808080;
}

#pdfCanvas {
  display: block;
  margin: 10px auto;
  background: #fff;
}