#pdf-viewer {
  text-align: center;
  /* max-width: 1200px; */
  margin: 0 auto;
  /* padding: 20px; */
  width: 100%;
  max-width: 100vw;
  overflow: auto;
}

#pdf-canvas {
  display: block;
  margin: 0 auto;
  max-width: 100%;
  height: auto;
  box-shadow: 0 0 10px rgba(0,0,0,0.2);
}

#pdf-controls {
  text-align: center;
  padding: 10px;
  background: #f5f5f5;
  border-bottom: 1px solid #ddd;
}

#pdf-controls div {
  display: inline-flex;
  cursor: pointer;
  padding: 8px 16px;
  margin: 0 5px;
  font-size: 16px;
}

@media (max-width: 480px) {
  #pdf-controls {
    flex-direction: row; 
    gap: 10px;
  }
}