/* calcs 
 * glenroy.com/tools/conversions/
 * */
.panel .collapse {
  display: none;
}
.panel .collapse.in {
  display: block;
}
.panel-collapse {padding:1em 0;}
.panel .conversion {display:flex;gap: 1em;  }
.panel .list-unstyled {list-style-type: none;}
.panel .conversion label {font-weight:bold;}

.panel-group .panel-heading a {
  padding: 0 0 0 20px;
 position: relative;
}
.panel-title a::before {
  content: "-";
  position: absolute;
  left: 0;
  top: 0;
  color: orange;
}
.panel-title a.collapsed::before {
  content: "+";
}