/* Visual layout fixes */
.btc-main{ display:grid; grid-template-columns:minmax(0,1fr) 420px; gap:24px; align-items:start; }
#btc-tab-ready,#btc-tab-build,.btc-cart{ grid-column:1 !important; }
.btc-summary-panel{ grid-column:2 !important; position:sticky; top:20px; z-index:2; align-self:start; }
@media (max-width:1099.98px){ .btc-main{ grid-template-columns:1fr; } .btc-summary-panel{ grid-column:1 !important; position:static; } }
.btc-card{ position:relative; z-index:1; min-height:420px; }
.btc-card .btc-advanced{ position:absolute; left:0; right:0; top:0; z-index:3; background:#fff; border:1px solid #E5E7EB; border-radius:12px; padding:14px; box-shadow:0 8px 24px rgba(0,0,0,.08); display:none; max-height:80vh; overflow:auto; }
.btc-card .btc-advanced .actions{ display:flex; gap:8px; justify-content:flex-end; margin-top:10px; }