/* Alteração exclusiva solicitada: o botão Fechar permanece fixo e sempre visível;
   após 2 s, somente o bloco/título do cabeçalho é ocultado. */
#eduqueStableEbookReader .eduque-reader-close,
#eduqueStableEbookReader.chrome-hidden .eduque-reader-close,
#eduqueStableEbookReader.mode-pdf .eduque-reader-close,
#eduqueStableEbookReader.mode-pdf.chrome-hidden .eduque-reader-close{
  position:fixed!important;
  top:calc(18px + env(safe-area-inset-top))!important;
  right:18px!important;
  z-index:920120!important;
  width:38px!important;
  height:38px!important;
  opacity:1!important;
  visibility:visible!important;
  transform:none!important;
  pointer-events:auto!important;
  display:grid!important;
}

/* Quando o timer de 2 s oculta os controles, o cabeçalho perde apenas seu bloco visual. */
#eduqueStableEbookReader.chrome-hidden .eduque-reader-head,
#eduqueStableEbookReader.mode-pdf.chrome-hidden .eduque-reader-head{
  opacity:1!important;
  visibility:visible!important;
  transform:none!important;
  pointer-events:none!important;
  background:transparent!important;
  border-color:transparent!important;
  box-shadow:none!important;
  backdrop-filter:none!important;
  -webkit-backdrop-filter:none!important;
}
#eduqueStableEbookReader.chrome-hidden .eduque-reader-head-copy,
#eduqueStableEbookReader.mode-pdf.chrome-hidden .eduque-reader-head-copy,
#eduqueStableEbookReader.chrome-hidden .eduque-reader-page-count,
#eduqueStableEbookReader.mode-pdf.chrome-hidden .eduque-reader-page-count{
  opacity:0!important;
  visibility:hidden!important;
  pointer-events:none!important;
}

@media(max-width:600px){
  #eduqueStableEbookReader .eduque-reader-close,
  #eduqueStableEbookReader.chrome-hidden .eduque-reader-close,
  #eduqueStableEbookReader.mode-pdf .eduque-reader-close,
  #eduqueStableEbookReader.mode-pdf.chrome-hidden .eduque-reader-close{
    top:calc(12px + env(safe-area-inset-top))!important;
    right:12px!important;
    width:36px!important;
    height:36px!important;
    font-size:26px!important;
  }
}