div.tabs
{
  display: flex;
  flex-wrap: nowrap;
  position: relative;
  justify-content: flex-start;
  align-items: flex-end;
  width: 100%;
  margin: 0px auto;
  padding-top: 8px;
  background: transparent;
 /* border-bottom: 1px solid gray;*/
}

div.tabs > div
{
  display: flex;
  position: relative;
  justify-content: center;
  align-items: flex-start;
  height: 1.5em;
  margin: 0px 4px 0px 4px;
  padding: 0 12px;
  border-top: 1px solid #555555;
  border-left: 1px solid #555555;
  border-right: 1px solid #555555;
  border-top-left-radius: 6px;
  border-top-right-radius: 6px;
  background: #777777;
  opacity: .7;

  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
}

div.tabs > div:hover
{
  cursor: pointer;
  background:  #a9bdcb;
  opacity: 1;
}

div.tabs > div.selected
{
  color: black;
  opacity: 1;
}

div.tabs div.mask
{
  display: none;
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 2px;
  z-index: 20;
}

div.tabs > div.selected,
div.tabs div.mask,
div.tabs > div.selected:hover
{
  background: #CCCCCC;
}

div.tab_binder
{
  display: flex;
  flex-direction: column;
  width: 100%;
  margin: 0 auto;
}

div.tab_content
{
  width: 100%;
  min-height: 400px;
  margin: 0px auto;
  background: #CCCCCC;
}