.exchange{
    background-color: #ebebeb;
    border: 0;
    padding: 0;
    margin: 0;
}

span{
    font-size: 14px;
}

.checked{
    background-color: #000;
    color: #fff;
}

.knok-control{
    border: 2px solid #000;
  }

  label{
      font-weight: bold;
      color: #000;
  }

  .fa-info-circle { 
    position: relative; 
    top: -0.5em; 
    font-size: 80%; 
    color: gray;
    margin-left: 5px;
}

button{
    width: 150px;
    //height: 30px;
    font-size: 13px;
}