.livros-multimidia-container {
  font-family: Arial, sans-serif;
  background-color: #00244D;
  color: white;
  padding: 20px;
  border-radius: 10px;
}
.livros-multimidia-container .folder {
  margin-bottom: 30px;
}
.livros-multimidia-container .folder h2 {
  color: white;
}
.livros-multimidia-container .livros, 
.livros-multimidia-container .videos {
  margin-left: 20px;
}
.container-livros, .container-videos {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
}
.livro, .video {
  max-width: 450px;
  margin-bottom: 10px;
}
.livro img {
  width: 160px;
  height: auto;
  display: block;
  margin-right: 10px;
  border: 7px solid #00244D;
}
.livro img:hover {
  border-color: #009df8;
}
.video a {
  display: block;
  padding: 7px;
  background-color: #ffc900;
  border-radius: 5px;
  text-align: center;
  margin-top: 15px;
  margin-left: 15px;
  color: #000;
  text-decoration: none;
}
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgba(0, 0, 0, 0.8);
}
.modal-content {
  position: relative;
  margin: 10% auto;
  padding: 20px;
  width: 80%;
  max-width: 800px;
  background-color: #fff;
  color: #000;
  border-radius: 10px;
}
.modal-content iframe {
  width: 100%;
  height: 400px;
}
.close {
  position: absolute;
  top: 0px;
  right: 5px;
  color: #000;
  font-size: 24px;
  font-weight: bold;
  cursor: pointer;
}

#categoriaDropdown {
  margin-bottom: 20px;
  padding: 10px;
  font-size: 16px;
  color: #fff;
  background-color: #00244D;
  border: 1px solid #fff;
  border-radius: 5px;
  font-family: Quicksand, Arial, sans-serif;
}

#categoriaDropdown:focus {
  outline: none;
}