.bts-button{border:none;display:inline-block;padding:0px 0px;vertical-align:top;overflow:hidden;text-decoration:none;color:inherit;background-color:inherit;text-align:center;cursor:pointer;white-space:nowrap}
.bts-button:disabled{cursor:not-allowed;opacity:0.3}

.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip .tooltiptext {
    visibility: hidden;
    width: 200px;
    background-color: #becbd2;
    color: black;
    text-align: left;
    font-size: 11px;
    border-radius: 6px;
    padding: 5px 10px;
    position: absolute;
    z-index: 1;
    bottom: 150%;
    left: 50%;
    margin-left: -10px;
}

.tooltip .tooltiptext::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    margin-left: -5px;
    border-width: 5px;
    border-style: solid;
    border-color: black transparent transparent transparent;
}

.tooltip:hover .tooltiptext {
    visibility: visible;
}

.popup {
    position: relative;
    display: inline-block;
}

.popup .popupmenu {
    visibility: hidden;
    width: 200px;
    background-color: #becbd2;
    color: black;
    text-align: left;
    font-size: 11px;
    border-radius: 6px;
    padding: 5px 10px;
    position: absolute;
    z-index: 1;
    bottom: 150%;
    left: 50%;
    margin-left: -10px;
}

.bts-no-select{     
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;  
}

.iframe-container {
    height: 100%;
    overflow: hidden;
    padding-bottom: 50%;
    position: relative;
}

.iframe-container iframe {
    border: 0;
    height: 100%;
    left: 0;
    position: absolute;
    top: 0;
    width: 100%;
}

.drop_file_zone {
    background-color: #EEE; 
    border: #999 1px dashed;
    width: 150px; 
    height: 150px;
    left: 0px;
    padding: 0px;
    font-size: 14px;
}
.drag_upload_file {
  width:50%;
  margin:0 auto;
}

a:link {
  text-decoration: none;
}

a:visited {
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

a:active {
  text-decoration: underline;
}

/* Small screen */
@media (max-width: 420px) {
    .iframe-container {
        height: 100%;
        <!--padding-bottom: 75%;-->
    }
}