/* ═══ TOGGLE LINE ═══ */
.tb-line {
  width:2px; background:var(--border); flex-shrink:0; cursor:pointer;
  position:relative; transition:background 0.15s;
}
.tb-line:hover { background:var(--accent); }
.tb-btn {
  position:absolute; left:50%; top:50%;
  transform:translate(-50%,-50%);
  width:22px; height:22px; border-radius:6px;
  background:var(--card); border:1px solid var(--border);
  display:flex; align-items:center; justify-content:center;
  font-size:9px; color:var(--dim); cursor:pointer;
  transition:all 0.15s; z-index:10; user-select:none;
}
.tb-line:hover .tb-btn { border-color:var(--accent); color:var(--accent); background:var(--input); }
.table-wrap.collapsed { width:0 !important; min-width:0 !important; overflow:hidden; border-left:none; flex:0 !important; }