/* Optional backtest panel; all ordinary pair-query styles remain unchanged. */
.chart-header-right{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.result-action{display:inline-flex;align-items:center;gap:5px;padding:5px 12px;border:3px solid var(--chip);border-radius:999px;background:var(--card);color:var(--text);font:inherit;font-size:12px;font-weight:600;box-shadow:0 1px 4px #0003;cursor:pointer;white-space:nowrap}
.result-action:hover{border-color:var(--border)}
.result-action:focus-visible{outline:2px solid var(--pos);outline-offset:2px}
.result-action:disabled{opacity:.45;cursor:wait}
#btOpen.active{color:var(--pos);border-color:var(--pos)}
.bt-panel{margin-top:16px;scroll-margin-top:18px}
.bt-panel-head{display:flex;align-items:center;justify-content:space-between;padding:16px 0;border-bottom:1px solid var(--border);gap:10px}
.bt-panel-head h2{font-size:16px;margin:0}.bt-context,.bt-sub,.bt-muted{color:var(--muted);font-size:12px}
.bt-close,.bt-link{border:0;background:none;color:var(--pos);cursor:pointer;font:inherit;font-size:12px;padding:5px}
.bt-panel-body{display:block;padding:18px 0 0}
.bt-context-strip{width:100%;background:var(--chip);border-radius:10px;padding:10px 13px;font-size:12px;color:var(--muted);display:flex;gap:16px;flex-wrap:wrap;margin-bottom:17px}
.bt-message,.bt-error{font-size:12px;line-height:1.7;margin:12px 0}
.bt-error{color:var(--err-color);background:var(--err-bg);padding:10px 13px;border-radius:10px}
.bt-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:15px;width:100%}
.bt-rule-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px;width:100%}
.bt-panel label{min-width:0;flex:none;display:flex;flex-direction:column;gap:6px;color:var(--muted);font-size:13px}
.bt-period{grid-template-columns:repeat(2,minmax(0,1fr));max-width:650px;margin-bottom:18px}
.bt-section-title{font-size:13px;font-weight:650;margin:18px 0 11px}
.bt-rule-preview{margin:13px 0;background:var(--band);border-radius:9px;padding:11px 13px;font-size:12px;line-height:1.8;color:var(--muted)}
.bt-fees{margin-top:20px;border-top:1px solid var(--border);padding-top:15px;font-size:13px;color:var(--muted)}
.bt-fees summary{cursor:pointer}.bt-fees .bt-grid{margin-top:14px}.bt-fees p{line-height:1.8}
.bt-form-footer{margin-top:20px;display:flex;justify-content:space-between;align-items:center;gap:15px;flex-wrap:wrap}
.bt-form-footer p{color:var(--muted);font-size:12px;max-width:850px;margin:0}.bt-form-footer button{flex-shrink:0}
.bt-primary{border:0;background:var(--accent);color:var(--accent-fg);border-radius:24px;padding:10px 23px;font:inherit;font-weight:650;cursor:pointer}.bt-primary:disabled{opacity:.5;cursor:wait}
.bt-chart-bar{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;margin-top:12px;font-size:12px;color:var(--muted)}
.bt-chart-controls,.bt-legend{display:flex;gap:15px;align-items:center;flex-wrap:wrap}.bt-chart-controls label{display:flex;flex-direction:row;gap:6px;align-items:center;flex:none;font-size:12px}
.bt-chart-controls input{width:15px;height:15px;padding:0;accent-color:var(--pos)}
.bt-legend span{display:inline-flex;gap:6px;align-items:center}
.bt-triangle{width:0;height:0;border-left:5px solid transparent;border-right:5px solid transparent;border-bottom:9px solid #d77920}
.bt-triangle.bt-blue{border-bottom-color:#166ad9;transform:rotate(180deg)}
.bt-dot{width:9px;height:9px;border-radius:50%;border:2px solid #20866d}
.bt-chart-help{font-size:12px;color:var(--muted);border-top:1px solid var(--border);padding-top:11px;margin:13px 0 0}
.bt-result-head{display:flex;justify-content:space-between;align-items:flex-start;gap:15px;margin:24px 1px 13px;flex-wrap:wrap}
.bt-result-head h2{font-size:17px;margin:0 0 4px}.bt-outline{border:1px solid var(--border);background:var(--card);color:var(--text);border-radius:23px;padding:8px 17px;font:inherit;font-size:13px;cursor:pointer}
.bt-state-note{color:var(--muted);background:var(--chip);padding:10px 13px;border-radius:10px;margin-bottom:14px;font-size:12px;line-height:1.7}
.bt-metrics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:13px;margin-bottom:15px}
.bt-metric{border:1px solid var(--border);border-radius:14px;padding:16px 17px;background:var(--card)}
.bt-name,.bt-explain{font-size:12px;color:var(--muted)}.bt-value{font-size:26px;line-height:1.4;font-weight:650;letter-spacing:-.8px;margin:7px 0;font-variant-numeric:tabular-nums}
.bt-value.bt-positive{color:#20866d}.bt-value.bt-negative{color:#c36c46}.bt-value.bt-shares{font-size:18px;letter-spacing:0;line-height:1.6}
.bt-ledger-head{display:flex;justify-content:space-between;gap:14px;align-items:center;padding:0 0 15px;flex-wrap:wrap}.bt-ledger-head strong{font-size:14px}
.bt-badge{background:var(--chip);border-radius:20px;padding:4px 10px;color:var(--muted);font-size:12px}
.bt-table-wrap{overflow:auto;max-width:100%}.bt-table-wrap table{border-collapse:collapse;width:100%;white-space:nowrap;text-align:left;font-size:12px}
.bt-table-wrap th{font-weight:500;background:var(--chip);color:var(--muted);padding:12px 15px;border-bottom:1px solid var(--border)}
.bt-table-wrap td{padding:12px 15px;border-bottom:1px solid var(--border);font-variant-numeric:tabular-nums}
.bt-table-wrap tbody tr{cursor:pointer}.bt-table-wrap tr:hover,.bt-table-wrap tr.selected{background:var(--band)}
.bt-table-wrap td.positive{color:#20866d;font-weight:600}.bt-table-wrap td.negative{color:#c36c46;font-weight:600}
.bt-table-foot{padding:13px 0 0;display:flex;justify-content:space-between;align-items:center;gap:15px;font-size:12px;color:var(--muted);flex-wrap:wrap}
.bt-method{margin-top:16px;color:var(--muted);font-size:12px}.bt-method summary{cursor:pointer;font-weight:600;font-size:13px}
.bt-method ul{padding-left:19px;line-height:1.9}.bt-method pre{white-space:pre-wrap;word-break:break-word;font:inherit}
.bt-panel [hidden],#btChartBar[hidden],#btResults[hidden],#btMethod[hidden]{display:none!important}
.bt-tip-row{margin-top:7px;padding-top:6px;border-top:1px solid var(--border)}
@media(max-width:900px){.bt-grid,.bt-rule-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.bt-metrics{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:600px){.chart-header-right{width:100%}.bt-rule-grid{grid-template-columns:1fr}.bt-grid,.bt-metrics{gap:12px}.bt-value{font-size:21px}.bt-value.bt-shares{font-size:15px}.bt-metric{padding:13px 12px}.bt-explain{font-size:11px}.bt-context-strip{gap:6px}.bt-form-footer button{width:100%}.bt-period{grid-template-columns:1fr}}

.bt-add-gap{display:flex;flex-direction:column;gap:6px;min-width:0}
.bt-panel .bt-add-custom{flex-direction:row;align-items:center;font-size:12px}.bt-add-custom input{width:14px;height:14px;min-width:14px;margin:0;padding:0;accent-color:var(--pos)}

@media(max-width:640px){#chartCard .chart-header{display:grid;grid-template-columns:minmax(0,1fr) auto;grid-template-areas:"title collect" "action action";gap:12px 8px}.chart-header-left{grid-area:title}.chart-header-right{display:contents}.result-action{grid-area:action;justify-self:start}#starPairBtn{grid-area:collect}}