.tablewrap{position:relative}
.tablewrap table th:first-child,
.tablewrap table td:first-child{
  position:sticky;
  left:0;
  z-index:2;
  background:#fff;
  box-shadow:2px 0 5px rgba(15,23,42,.10);
}
.tablewrap table th:first-child{z-index:3}
@media(max-width:800px){
  .tablewrap table th:first-child,
  .tablewrap table td:first-child{min-width:102px}
}