.accordion {
    background-color: #eee;
    color: #444;
    cursor: pointer;
    padding: 18px;
    width: 100%;
    border: none;
    text-align: left;
    outline: none;
    font-size: 15px;
    transition: 0.4s;
    font-size: 30px;
  }
  
  .active, .accordion:hover {
    /*background-color: #ccc;  */
  }


.panel_custom {

    padding: 0 18px;
    background-color: white;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.2s ease-out;
}
.panel {
  padding: 0 18px;
  background-color: white;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.2s ease-out;
}


  .block_research {

    /*display: inline;*/
    
    margin-bottom: 50px;
  }

  .block_research_1 {

    width:20%;
  }

  .form-control_bis {
    /*display: block; */
    width: 70%;
    height: calc(1.5em + .75rem + 2px);
    padding: .375rem .75rem;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: #495057;
    background-color: #fff;
    background-clip: padding-box;
    border: 1px solid #ced4da;
    border-radius: .25rem;
    transition: border-color .15s ease-in-out,box-shadow .15s ease-in-out;
}

.input-group-text_bis {
    /*
    display: -ms-flexbox;
     
    display: flex;
   */
    -ms-flex-align: center;
    align-items: center;
    
    padding: .375rem .75rem;
    margin: 0;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: #495057;
    text-align: center;
    white-space: nowrap;
    background-color: #e9ecef;
    border: 1px solid #ced4da;
    border-radius: .25rem;
}

.block_info_client 
{
    width:100%;
    align-items: center;
    align-content: center;
    text-align: center;
    margin-bottom: 70px;
}

.block_info_client select
{
    width:50%;
}