.bd-placeholder-img {
  font-size: 1.125rem;
  text-anchor: middle;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

@media (min-width: 768px) {
  .bd-placeholder-img-lg {
    font-size: 3.5rem;
  }
}

#file_import_drag_area {
  font-size: 3rem;
  font-weight: 600;
  width: 90%;
  height: 15rem;
}

#file_import_drag_area:hover {
  font-size: 3.5rem;
  font-weight: 1000;
}

#file_import_drag_area:hover:before {
  /*font-weight: 1000;
  content: 'Here';*/
}

#file_import_drag_area::before {
  content: attr(data-value);
  
  position: relative;
  top: 0;
  right: 0;
  width: 100%;
  height: 15rem;
  /*border: 1px solid red;*/
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
}

.filename {
  /*
  margin-left: .1rem;
  padding-left: .1rem;
  */
}

.menu_session_code, .detail_session_code {
  margin-left: .1rem;
  padding-left: .1rem;
  font-size: .5em;
}

.session_detail>h2 {
  background-color: #F7F7F7;
  /*border-bottom: solid .1rem black;*/
}

.detail_session_code {
  margin-left: .1rem;
  padding-left: .1rem;
  font-size: .5em;
}