@layer channels {
    .content-body:has(#backtester) { padding: 0; min-width: 0; container: backtester / inline-size; }
    .backtester { padding: 20px 24px 32px; min-width: 0; color: var(--ink-primary); font: 14px/1.5 var(--font-ui); }
    .backtester [hidden] { display: none !important; }
    .bt-toolbar { display: flex; align-items: end; flex-wrap: wrap; gap: 8px; padding: 8px 0; }
    .backtester label { display: flex; flex-direction: column; gap: 7px; color: var(--ink-secondary); font-size: 12px; min-width: 0; }
    .backtester input, .backtester select, .backtester textarea, .backtester button { color: var(--ink-primary); background: var(--surface-raised); border: 1px solid var(--line); border-radius: var(--radius-control); padding: 9px 11px; font: inherit; letter-spacing: 0; max-width: 100%; box-sizing: border-box; }
    .backtester input, .backtester select { min-height: 38px; min-width: 0; }
    .backtester button { display: inline-flex; align-items: center; justify-content: center; gap: 7px; min-height: 36px; cursor: pointer; text-transform: none; border: 0; background: transparent; color: var(--ink-secondary); transition: transform var(--dur-fast) var(--ease-out), opacity var(--dur-fast) var(--ease-out); }
    .backtester button:active:not(:disabled) { transform: scale(.97); }
    .backtester button.bt-primary { background: var(--accent); color: var(--accent-ink); font-weight: 500; padding-inline: 16px; }
    .backtester button.bt-secondary { background: var(--surface-raised); color: var(--ink-primary); }
    .backtester button:disabled { opacity: .5; cursor: default; }
    .backtester :is(button, input, select, textarea, summary):focus-visible { outline: 2px solid var(--line-focus); outline-offset: 2px; }
    .backtester :is(input, select, textarea) { font-size: 13px; }
    .bt-grow { flex: 1 1 220px; }
    #bt-ticker { width: 90px; font-family: var(--font-data); }
    .bt-muted, .bt-data-status { color: var(--ink-muted); font-size: 12px; }
    .bt-data-status { margin: 4px 0 10px; overflow-wrap: anywhere; }
    .bt-error { color: var(--signal-down); padding: 10px 0; white-space: pre-wrap; overflow-wrap: anywhere; }
    .bt-empty { padding: 28px 0; color: var(--ink-muted); }
    #bt-chart .chart-overlay { height: 480px; max-height: 58dvh; min-height: 350px; }
    #bt-chart .chart-overlay.is-fullscreen { height: 100dvh; max-height: none; }
    #bt-chart [data-indicator="rsi"], #bt-chart #chart-alert-panel, #bt-chart #chart-position-menu { display: none; }
    #bt-chart .chart-tool { border: 0; border-radius: 2px; min-height: 28px; padding: 4px; background: transparent; }
    .bt-tabs { display: flex; gap: 8px; border-bottom: 1px solid var(--line-subtle); padding: 14px 0 12px; margin: 0 0 16px; }
    .bt-tabs [role="tab"] { background: transparent; border: 0; color: var(--ink-muted); white-space: nowrap; padding-inline: 14px; min-height: 38px; }
    .bt-tabs [aria-selected="true"] { color: var(--ink-primary); background: var(--surface-raised); }
    .bt-strategy-grid { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 32px; }
    .bt-code-column { min-width: 0; }
    .bt-run-settings { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; align-content: start; }
    .bt-run-settings > :is(p, h3, div, span, button, details), .bt-run-settings > label:has(select) { grid-column: 1 / -1; }
    .bt-assumptions { font-size: 12px; color: var(--ink-secondary); line-height: 1.6; margin: 0; }
    .bt-code-label { margin-bottom: 6px; }
    .bt-editor { position: relative; height: 380px; margin-bottom: 18px; background: var(--surface-canvas); border-radius: var(--radius-control); overflow: hidden; }
    .bt-editor pre, .bt-editor textarea { position: absolute; inset: 0; width: 100%; height: 100%; margin: 0; padding: 12px; border: 0; box-sizing: border-box; font: 13px/1.6 var(--font-data); white-space: pre; tab-size: 4; overflow: auto; }
    .bt-editor pre { pointer-events: none; background: transparent; }
    .bt-editor pre code { font: inherit; background: transparent; border: 0; padding: 0; border-radius: 0; }
    .bt-editor textarea { background: transparent; resize: none; color: transparent; caret-color: var(--ink-primary); }
    .bt-editor .hljs-keyword, .bt-editor .hljs-built_in { color: var(--ind-secondary); }
    .bt-editor .hljs-string, .bt-editor .hljs-number { color: var(--ind-primary); }
    .bt-editor .hljs-comment { color: var(--ink-muted); }
    #bt-parameters { width: 100%; box-sizing: border-box; font-family: var(--font-data); }
    .bt-item, .bt-job { display: flex; align-items: center; gap: 8px; padding: 10px 0; border-bottom: 1px solid var(--line-subtle); flex-wrap: wrap; }
    .bt-item input[type="text"] { flex: 1 1 140px; }
    .bt-item textarea { flex: 1 1 200px; }
    .bt-drawing-editor { flex-basis: 100%; font-size: 12px; color: var(--ink-secondary); }
    .bt-drawing-editor summary { cursor: pointer; padding: 4px 0; }
    .bt-drawing-editor label { flex: 1 1 190px; }
    .bt-job progress { width: 100px; accent-color: var(--ink-secondary); }
    .bt-job > span:first-child { flex: 1 1 260px; overflow-wrap: anywhere; }
    .bt-jobs { margin-top: 16px; }
    .bt-metrics { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px 24px; margin: 22px 0; padding: 20px 0; border-block: 1px solid var(--line-subtle); }
    .bt-metrics div { min-width: 0; }
    .bt-metrics dt { color: var(--ink-secondary); font-size: 12px; }
    .bt-metrics dd { margin: 6px 0 0; font: 18px var(--font-data); }
    .bt-metrics small { display: block; color: var(--ink-muted); font: 12px var(--font-ui); margin-top: 6px; }
    .bt-result-chart { height: 230px; width: 100%; margin: 8px 0 16px; }
    .bt-report-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
    .bt-table-wrap { overflow: auto; max-height: 420px; }
    .bt-table { width: 100%; border-collapse: collapse; font-size: 12px; white-space: nowrap; }
    .bt-table th { color: var(--ink-secondary); text-align: left; font-weight: 500; position: sticky; top: 0; background: var(--surface-panel); }
    .bt-table :is(th, td) { padding: 8px; border-bottom: 1px solid var(--line-subtle); }
    .bt-table td { font-family: var(--font-data); text-align: right; }
    .bt-table td:first-child { text-align: left; }
    .bt-positive { color: var(--signal-up); }
    .bt-negative { color: var(--signal-down); }
    .bt-context { color: var(--ink-secondary); font-size: 12px; line-height: 1.6; overflow-wrap: anywhere; }
    .bt-result-title { font-size: 15px; font-weight: 500; margin: 18px 0 8px; text-transform: none; letter-spacing: 0; }
    @media (hover: hover) and (pointer: fine) {
        .backtester button:not(:disabled):hover { background: var(--surface-hover); color: var(--ink-primary); }
        .backtester button.bt-primary:not(:disabled):hover { background: var(--accent-hover); color: var(--accent-ink); }
    }
    @container backtester (max-width: 760px) {
        .backtester { padding: 8px; }
        .bt-strategy-grid, .bt-report-grid { grid-template-columns: minmax(0, 1fr); }
        .bt-toolbar label { flex: 1 1 130px; }
        #bt-chart .chart-overlay { height: 420px; min-height: 320px; }
        #bt-chart .chart-toolbar, #bt-chart .chart-status-bar { overflow-x: auto; }
        #bt-chart .chart-toolbar > * { flex-shrink: 0; }
        #bt-chart .chart-pane-legend { max-width: calc(100% - 80px); overflow-x: auto; pointer-events: auto; }
        .bt-metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px 12px; }
    }
}

@layer channels {
    .backtester h2 { font-size: 16px; font-weight: 500; letter-spacing: 0; text-transform: none; margin: 0; }
    .backtester .icon { flex: 0 0 auto; width: 16px; height: 16px; }
    .backtester input::placeholder, .backtester textarea::placeholder { color: var(--ink-muted); opacity: 1; }
    .bt-workspace-bar { display: flex; align-items: end; gap: 8px; padding-bottom: 18px; }
    .bt-workspace-field { flex: 0 1 300px; }
    .bt-actions { display: flex; align-items: center; gap: 2px; }
    .bt-save-state { margin: 0 10px 9px auto; color: var(--ink-muted); font-size: 12px; white-space: nowrap; }
    .bt-data-panel { background: var(--surface-canvas); margin: 0 -24px; padding: 0 24px; }
    .backtester summary { cursor: pointer; list-style: none; }
    .backtester summary::-webkit-details-marker { display: none; }
    .bt-data-panel > summary, .bt-jobs > summary { display: flex; align-items: center; gap: 10px; min-height: 44px; font-size: 13px; color: var(--ink-secondary); }
    .bt-data-panel > summary > .bt-muted { margin-left: auto; text-align: right; }
    .bt-details-caret { color: var(--ink-muted); transition: transform var(--dur-fast) var(--ease-out); }
    details[open] > summary > .bt-details-caret { transform: rotate(180deg); }
    .bt-import-grid { display: grid; grid-template-columns: 90px 1fr 1fr 1fr auto; gap: 12px; align-items: end; padding: 8px 0 16px; }
    .bt-import-grid input { width: 100%; }
    .bt-data-status { padding-bottom: 16px; margin: 6px 0 0; }
    .bt-analysis-bar { display: flex; align-items: end; justify-content: space-between; gap: 24px; padding: 16px 0; }
    .bt-date-range, .bt-view-controls { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
    .bt-date-range { flex: 0 1 360px; }
    .bt-view-controls { flex: 0 1 310px; }
    .bt-section-heading { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; min-height: 42px; margin-bottom: 12px; }
    .bt-count { color: var(--ink-muted); font: 12px var(--font-ui); margin-left: 6px; }
    .bt-pattern-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 32px; }
    .bt-drawing-row { display: grid; grid-template-columns: minmax(90px, 1fr) 108px 36px 36px; gap: 6px; }
    .bt-drawing-editor { grid-column: 1 / -1; }
    .bt-drawing-editor summary::before { content: '+'; margin-right: 8px; }
    .bt-drawing-editor[open] summary::before { content: '-'; }
    .bt-drawing-editor .bt-toolbar { padding-top: 12px; }
    .bt-pattern-item { display: block; }
    .bt-pattern-item > summary { display: flex; align-items: center; gap: 10px; min-height: 36px; color: var(--ink-primary); }
    .bt-pattern-item > summary > span:first-child { flex: 1; overflow-wrap: anywhere; }
    .bt-pattern-fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; padding-top: 14px; }
    .bt-pattern-fields > :is(textarea, .bt-pattern-name, .bt-pattern-links) { grid-column: 1 / -1; }
    .bt-pattern-fields input, .bt-pattern-fields textarea { width: 100%; }
    .bt-pattern-fields .bt-actions { grid-column: 1 / -1; justify-content: flex-end; }
    .bt-run-settings .bt-section-heading { margin-bottom: 0; }
    .bt-run-settings > p { margin: 0; }
    .bt-settings-label { margin: 8px 0 0; font-size: 13px; font-weight: 500; color: var(--ink-secondary); letter-spacing: 0; text-transform: none; }
    .bt-assumptions summary { padding-block: 4px; }
    .bt-assumptions p { margin: 10px 0; }
    .bt-jobs { margin-top: 28px; border-top: 1px solid var(--line-subtle); }
    .bt-jobs > summary > .bt-details-caret { margin-left: auto; }
    .bt-job a { color: var(--ink-primary); padding: 8px 10px; text-underline-offset: 4px; }
    .bt-result-toolbar { padding: 4px 0 20px; }
    .bt-grow { min-width: 0; }
    .bt-control { position: relative; display: inline-flex; min-width: 0; max-width: 100%; }
    .backtester .bt-native-control { position: absolute; width: 1px; height: 1px; min-height: 0; padding: 0; border: 0; opacity: 0; clip-path: inset(50%); pointer-events: none; }
    .backtester .bt-control-trigger { width: 100%; min-height: 38px; padding: 9px 11px; border: 1px solid var(--line); background: var(--surface-raised); color: var(--ink-primary); justify-content: flex-start; font-size: 13px; }
    .bt-control-value { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; text-align: left; }
    .bt-control-trigger > .icon:last-child { width: 12px; height: 12px; margin-left: 8px; color: var(--ink-muted); }
    .backtester .bt-popover { position: fixed; inset: auto; margin: 0; padding: 6px; border: 1px solid var(--line-strong); border-radius: 8px; background: var(--surface-menu); color: var(--ink-primary); overflow: auto; box-sizing: border-box; z-index: var(--z-dropdown); box-shadow: none; opacity: 0; transform: scale(.97); transition: opacity var(--dur-instant) var(--ease-out), transform var(--dur-instant) var(--ease-out), display var(--dur-instant) allow-discrete, overlay var(--dur-instant) allow-discrete; }
    .backtester .bt-popover:popover-open { opacity: 1; transform: scale(1); transition-duration: var(--dur-fast); }
    @starting-style { .backtester .bt-popover:popover-open { opacity: 0; transform: scale(.97); } }
    .backtester .bt-option-list { padding: 0; min-width: 0; border: 0; background: transparent; box-shadow: none; transition: none; transform: none; opacity: 1; }
    .backtester .bt-option { width: 100%; justify-content: space-between; min-height: 38px; font-size: 13px; padding: 9px 10px; border-radius: 4px; color: var(--ink-secondary); text-align: left; }
    .bt-option > span { overflow-wrap: anywhere; }
    .bt-option .icon { opacity: 0; width: 14px; height: 14px; }
    .backtester .bt-option[aria-selected="true"] { color: var(--ink-primary); background: var(--surface-selected); }
    .bt-option[aria-selected="true"] .icon { opacity: 1; }
    .backtester .bt-menu-search { width: 100%; margin: 2px 0 6px; background: var(--surface-canvas); }
    .bt-menu-empty { padding: 12px; color: var(--ink-muted); }
    .bt-calendar-header { display: grid; grid-template-columns: 36px minmax(0, 1fr) 36px; align-items: center; gap: 2px; margin-bottom: 8px; }
    .bt-calendar-header button { padding-inline: 6px; color: var(--ink-primary); font-size: 13px; }
    .bt-calendar-next .icon { rotate: 180deg; }
    .bt-calendar-week { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 2px; }
    .bt-calendar-week > span { font-size: 11px; color: var(--ink-muted); text-align: center; padding: 6px 0; }
    .backtester .bt-calendar-week button { width: 100%; aspect-ratio: 1; min-height: 0; padding: 0; border-radius: 4px; font-size: 13px; color: var(--ink-primary); }
    .backtester .bt-calendar-week .bt-day-outside { color: var(--ink-muted); }
    .backtester .bt-calendar-week [aria-selected="true"] { background: var(--control-selected); }
    .backtester .bt-calendar-week [aria-current="date"] { text-decoration: underline; text-underline-offset: 4px; }
    .bt-calendar-footer { display: flex; align-items: center; padding: 8px 4px 0; margin-top: 6px; border-top: 1px solid var(--line-subtle); gap: 4px; font-size: 12px; }
    .bt-calendar-footer > span { flex: 1; color: var(--ink-muted); }
    .bt-calendar-footer button { font-size: 12px; padding: 4px 8px; }
    .bt-month-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 6px; min-height: 230px; }
    .backtester .bt-popover[data-keyboard="true"] { transition: none; }
    @media (prefers-reduced-motion: reduce) {
        .backtester button, .backtester .bt-popover, .backtester .bt-popover:popover-open, .bt-details-caret { transition: none; }
        .backtester button:active:not(:disabled), .backtester .bt-popover:popover-open { transform: none; }
    }
    @container backtester (max-width: 1080px) {
        .bt-pattern-grid, .bt-strategy-grid { grid-template-columns: minmax(0, 1fr); gap: 24px; }
        .bt-import-grid { grid-template-columns: 90px 1fr 1fr; }
        .bt-save-state { white-space: normal; }
    }
    @container backtester (max-width: 760px) {
        .backtester { padding: 12px 10px 24px; }
        .bt-workspace-bar { flex-wrap: wrap; gap: 4px; padding-bottom: 12px; }
        .bt-workspace-field { flex-basis: 100%; margin-bottom: 4px; }
        .bt-save-state { flex: 1; margin: 0 2px; font-size: 11px; }
        .bt-actions { gap: 0; }
        .backtester .bt-actions button { min-height: 34px; padding: 7px; }
        .bt-data-panel { margin-inline: -10px; padding-inline: 10px; }
        .bt-data-panel > summary { flex-wrap: wrap; gap: 6px; padding-block: 8px; }
        .bt-data-panel > summary > .bt-muted { order: 1; flex-basis: 100%; text-align: left; margin: 0; }
        .bt-data-panel > summary > .bt-details-caret { margin-left: auto; }
        .bt-import-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
        .bt-import-grid > button { grid-column: 1 / -1; }
        .bt-analysis-bar { display: grid; grid-template-columns: minmax(0, 1fr); gap: 10px; }
        .bt-control-trigger > .icon:last-child { margin-left: 0; }
        .backtester .bt-control-trigger { padding: 8px; gap: 5px; font-size: 12px; }
        .bt-tabs { gap: 2px; justify-content: space-between; }
        .bt-tabs [role="tab"] { padding: 8px; font-size: 12px; gap: 5px; }
        .bt-tabs .icon { width: 14px; height: 14px; }
        .bt-drawing-row { grid-template-columns: minmax(70px, 1fr) 80px 28px 28px; gap: 2px; }
        .bt-drawing-row > button { padding: 5px; }
    }
}

@layer channels {
    @container backtester (max-width: 480px) {
        .bt-drawing-row { grid-template-columns: minmax(0, 1fr) 44px 44px; gap: 4px; }
        .bt-drawing-row > input { grid-column: 1 / -1; }
        .bt-run-settings, .bt-pattern-fields { grid-template-columns: minmax(0, 1fr); }
        .bt-code-header { flex-wrap: wrap; }
        .bt-tabs [role="tab"] { flex: 1; min-height: 44px; padding-inline: 6px; }
    }
    @media (pointer: coarse) {
        .backtester :is(input, select, textarea) { font-size: 16px; }
        .backtester .bt-editor :is(textarea, pre) { font-size: 16px; }
        .backtester button, .backtester .bt-actions button { min-height: 44px; }
        .backtester .bt-actions button, .backtester .bt-drawing-row > button { min-width: 44px; }
        .backtester .bt-calendar-week button { min-height: 32px; }
        .backtester .bt-control-trigger { min-height: 44px; font-size: 14px; }
    }
}