.open-modal-btn {
  background-color: #007bff;
  color: white;
  padding: 15px 25px;
  font-size: 1.2em;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  display: block;
  margin: auto;
  margin-bottom: 20px;
  text-align: center;
}
.open-modal-btn:hover {
  background-color: #0056b3;
}
.modal {
  display: none;
  position: fixed;
  z-index: 1;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgba(0, 0, 0, 0.5);
  padding-top: 60px;
}
.modal .modal-content {
  background-color: white;
  margin: auto;
  padding: 20px;
  border-radius: 10px;
  width: 80%;
  max-width: 800px;
  max-height: 80vh;
  overflow: auto;
}
.modal .modal-content .close-btn {
  color: #aaa;
  float: right;
  font-size: 28px;
  font-weight: bold;
  cursor: pointer;
}
.modal .modal-content .close-btn:hover,
.modal .modal-content .close-btn:focus {
  color: black;
  text-decoration: none;
  cursor: pointer;
}
.modal .modal-content h1 {
  color: #333;
}
.modal .modal-content .question-list {
  list-style-type: none;
  padding: 0;
}
.modal .modal-content .question-list li {
  background: #e9ecef;
  margin: 15px 0;
  border-radius: 5px;
  overflow: hidden;
  transition: background 0.3s;
  padding: 0;
}
.modal .modal-content .question-list li .question {
  cursor: pointer;
  padding: 20px;
  color: #007bff;
  font-size: 1em;
  margin: 0;
}
.modal .modal-content .question-list li .question:hover {
  background: #d3d3d3;
}
.modal .modal-content .question-list li .answer {
  display: none;
  padding: 20px;
  background: #f9f9f9;
  border-top: 1px solid #ccc;
  color: #000;
}
.modal .modal-content .image-wrapper {
  display: flex;
  justify-content: center;
  margin: 10px 0;
}
.modal .modal-content .image-wrapper img {
  max-width: 100%;
  height: auto;
  margin: 0 10px;
  overflow: hidden;
}
.modal .modal-content .content {
  font-size: 1.2em;
  color: #555;
}
.modal .modal-content .download-link {
  color: deepskyblue;
  text-decoration: underline;
}
.modal .modal-content .download-link:hover {
  text-decoration: none;
}