input, textarea, select{width: auto;min-height:auto;}
#header {
  /*background: #e6e6e6;
  border-bottom: 1px solid #ccc;
  box-shadow: inset 0 -1px 0 #ccc;*/
}
#site-title {margin: 0;padding: 12px 16px 6px;font-size: 22px;}
#site-title span {text-decoration: none;color: #000;}
#main-menu {padding-left: 16px;}
#main-menu ul {list-style: none;margin: 0;padding: 0;display: flex;}
#main-menu li {margin-right: 6px;cursor:pointer}
#main-menu span {
  display: block;padding: 6px 12px;font-size: 15px;
  text-decoration: none;color: #333;
  background: #dcdcdc;border-radius: 3px 3px 0 0;
  border: 1px solid #ccc;border-bottom: none;
}
#main-menu span:hover {background: #eee;}
#main-menu li.selected span {
  background: #fff;color: #000;
  position: relative;top: 3px;z-index: 2;
}
#content {
  padding: 16px;background: #fff;padding:2em 0;
  border: 3px solid #ccc;box-shadow: inset 0 -1px 0 #ccc;
}
.tab-content {display: none;}
.tab-content.selected {display: block;}