/* Sessions tab (Screen C): seeded simulation controls, results, replay strip
   and the what-if comparison. Site Modernist tokens: ink rules, red accent,
   square corners, tabular figures. Every coloured mark also has a label. */

.lab-sess { container-type: inline-size; display: grid; grid-template-columns: minmax(0, 1fr); gap: 16px; min-width: 0; }
.lab-sess > *, .lab-sess .lab-card + .lab-card { margin: 0; }
.lab-sess-results { display: grid; grid-template-columns: minmax(0, 1fr); gap: 16px; }
.lab-sess-results:empty, .lab-sess-notice:empty { display: none; }
.lab-sess code, .lab-sess-seedval { font: 600 0.92em/1 ui-monospace, Consolas, monospace; background: color-mix(in srgb, var(--color-text) 7%, transparent); padding: 2px 5px; word-break: break-all; }

/* — head — */
.lab-sess-head { border-bottom: 2px solid var(--color-text); padding: 2px 0 14px; }
.lab-sess-head .lab-section-title { font-size: clamp(22px, 2.6vw, 28px); letter-spacing: -0.015em; }
.lab-sess-lede { font-size: 14.5px; line-height: 22px; margin: 6px 0 0; max-width: 72ch; color: color-mix(in srgb, var(--color-text) 82%, transparent); }

/* — setup: controls + rules — */
.lab-sess-setup { display: grid; gap: 16px; align-items: stretch; }
@container (min-width: 700px) {
  .lab-sess-setup { grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); }
}
.lab-sess-controls { border-top: 3px solid var(--color-text); }
.lab-sess-rules { border-top: 3px solid var(--lab-line-strong); display: flex; flex-direction: column; }
.lab-sess-rules > .btn { align-self: flex-start; margin-top: auto; }
.lab-sess-seed-row { display: flex; gap: 8px; }
.lab-sess-seed-row .input { flex: 1 1 auto; min-width: 0; font-family: ui-monospace, Consolas, monospace; }
.lab-sess-newseed { flex: 0 0 auto; white-space: nowrap; }
.lab-sess-controls .lab-field { margin-bottom: 14px; }
.lab-sess-actions { margin-top: 4px; }
.lab-sess-run { min-width: 190px; }
.lab-sess-blocker:empty { display: none; }
.lab-sess-blocker { margin: 0 0 12px; }
.lab-sess-blocker .lab-keypoint { margin: 0; display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; }
.lab-sess-estimate { margin-top: 10px; }

.lab-sess-rules-list { margin: 0 0 14px; display: grid; }
.lab-sess-rule { display: grid; grid-template-columns: minmax(96px, 38%) minmax(0, 1fr); gap: 10px; padding: 7px 0; border-bottom: 1px solid var(--lab-line); font-size: 13.5px; line-height: 19px; }
.lab-sess-rule:first-child { border-top: 1px solid var(--lab-line); }
.lab-sess-rule dt { color: var(--lab-muted); }
.lab-sess-rule dd { margin: 0; font-weight: 600; font-feature-settings: 'tnum' 1; overflow-wrap: anywhere; }

/* — progress — */
.lab-sess-progress { margin-top: 14px; }
.lab-sess-bar { height: 12px; border: 1px solid var(--color-text); background: #fff; overflow: hidden; }
.lab-sess-bar-fill { display: block; height: 100%; width: 0; background: var(--color-accent); transition: width 0.25s linear; }
.lab-sess-progress-text { font-size: 13px; font-weight: 600; margin: 6px 0 0; }

/* — results — */
.lab-sess-res, .lab-sess-replay, .lab-sess-compare { border-top: 3px solid var(--color-text); }
.lab-sess-res-head { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 8px 16px; margin-bottom: 12px; }
.lab-sess-res-head .lab-section-title { margin: 0; }
.lab-sess-res-head .lab-card-title { margin: 0; }
.lab-sess-tags { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; margin: 0; padding: 0; }
.lab-sess-tags li { font-size: 12px; font-weight: 600; letter-spacing: 0.02em; border: 1px solid var(--lab-line-strong); padding: 3px 8px; background: #fff; }
.lab-sess-tags li.lab-stale { border-color: var(--lab-caution); background: var(--lab-caution-bg); }
.lab-sess-method { margin: 0 0 14px; max-width: 80ch; }
.lab-sess-stale { margin: 0 0 14px; }
.lab-sess-stale .lab-btn-row { margin-top: 10px; }
.lab-sess-res-stale .lab-kpi-value, .lab-sess-res-stale .lab-table td, .lab-sess-res-stale .lab-sess-stat-value,
.lab-sess-res-stale .lab-sess-stack, .lab-sess-res-stale .lab-sess-qchart, .lab-sess-res-stale .lab-sess-strip { opacity: 0.55; }
.lab-sess-kpis { grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); margin-bottom: 4px; }
.lab-sess-kpis .lab-kpi { background: #fff; }
.lab-sess-block { margin-top: 22px; }
.lab-sess-h { font-family: var(--font-heading); font-weight: var(--font-heading-weight); font-size: 16px; line-height: 1.25; margin: 0 0 2px; }
.lab-sess-block > .lab-help { margin: 0 0 10px; }
.lab-sess-bench { margin-top: 18px; padding-top: 10px; border-top: 1px solid var(--lab-line); }

/* endings: stacked bar + table */
.lab-sess-stack { display: block; width: 100%; height: 22px; margin: 4px 0 10px; background: var(--color-surface); }
.lab-sess-seg { stroke: #fff; stroke-width: 2; vector-effect: non-scaling-stroke; }
.lab-sess-seg-target, .lab-sess-swatch-target { fill: var(--lab-win); background: var(--lab-win); }
.lab-sess-seg-stop_loss, .lab-sess-swatch-stop_loss { fill: var(--lab-loss); background: var(--lab-loss); }
.lab-sess-seg-unfundable, .lab-sess-swatch-unfundable { fill: var(--color-text); background: var(--color-text); }
.lab-sess-seg-table_cap, .lab-sess-swatch-table_cap { fill: var(--lab-caution); background: var(--lab-caution); }
.lab-sess-seg-horizon, .lab-sess-swatch-horizon { fill: var(--lab-push); background: var(--lab-push); }
.lab-sess-swatch { display: inline-block; width: 11px; height: 11px; margin-right: 8px; vertical-align: -1px; }
.lab-sess-endings th[scope="row"] { font-size: 13.5px; letter-spacing: 0; text-transform: none; font-weight: 600; color: var(--color-text); border-bottom: 1px solid var(--lab-line); white-space: nowrap; }
.lab-sess-endings tfoot th, .lab-sess-endings tfoot td { border-top: 2px solid var(--lab-line-strong); border-bottom: 0; font-weight: 700; color: var(--color-text); }
.lab-sess-endings .lab-sess-rate { font-weight: 700; }
.lab-sess-endings .lab-sess-ci { color: var(--lab-muted); white-space: nowrap; }
.lab-sess-row-zero th, .lab-sess-row-zero td { color: var(--lab-muted) !important; font-weight: 400 !important; }
/* Narrow cards: four columns squeeze the labels into three-line stacks, so each
   row becomes a card instead (label across the top, the three figures beneath,
   each captioned from its data-label). The column headers stay for screen
   readers; the captions are hidden from them so nothing is read twice. */
@container (max-width: 560px) {
  .lab-sess-endings, .lab-sess-endings tbody, .lab-sess-endings tfoot { display: block; }
  .lab-sess-endings thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
  .lab-sess-endings tr { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1.4fr); gap: 3px 12px; padding: 10px 0 11px; border-bottom: 1px solid var(--lab-line); }
  .lab-table.lab-sess-endings th, .lab-table.lab-sess-endings td { padding: 0; border: 0; text-align: left; }
  .lab-table.lab-sess-endings th[scope="row"] { grid-column: 1 / -1; font-size: 14px; white-space: normal; }
  .lab-sess-endings td { font-size: 14px; }
  .lab-sess-endings td::before { content: attr(data-label); content: attr(data-label) / ""; display: block; font-size: 11px; line-height: 16px; letter-spacing: 0.05em; text-transform: uppercase; font-weight: 600; color: var(--lab-muted); }
  .lab-sess-endings .lab-sess-ci { white-space: nowrap; }
  .lab-sess-endings tfoot tr { border-top: 2px solid var(--lab-line-strong); border-bottom: 0; }
}

/* P&L spread chart */
.lab-sess-qchart { display: block; width: 100%; height: 64px; overflow: visible; }
.lab-sess-q { position: relative; margin: 4px 0 0; }
.lab-sess-qchart line, .lab-sess-qchart rect { vector-effect: non-scaling-stroke; }
.lab-sess-q-axis { stroke: var(--lab-line-strong); stroke-width: 1; }
.lab-sess-q-zero { stroke: var(--color-text); stroke-width: 1.5; stroke-dasharray: 5 4; }
.lab-sess-q-whisker, .lab-sess-q-cap { stroke: var(--color-text); stroke-width: 1.5; }
.lab-sess-q-outer { fill: color-mix(in srgb, var(--color-text) 16%, transparent); }
.lab-sess-q-inner { fill: color-mix(in srgb, var(--color-accent) 20%, #fff); stroke: var(--color-text); stroke-width: 1.5; }
.lab-sess-q-median { stroke: var(--color-accent-700); stroke-width: 4; }
.lab-sess-q-mean { stroke: var(--color-text); stroke-width: 2; stroke-dasharray: 2 3; }
.lab-sess-q-scale { position: relative; display: flex; justify-content: space-between; font-size: 12.5px; font-weight: 600; color: var(--lab-muted); margin-top: 4px; min-height: 18px; }
.lab-sess-q-be { position: absolute; top: 0; transform: translateX(-50%); color: var(--color-text); white-space: nowrap; }
.lab-sess-q-legend { display: flex; flex-wrap: wrap; gap: 4px 16px; list-style: none; margin: 8px 0 10px; padding: 0; font-size: 12.5px; color: var(--lab-muted); }
.lab-sess-q-legend li { display: inline-flex; align-items: center; gap: 6px; }
.lab-sess-key { display: inline-block; width: 16px; height: 10px; }
.lab-sess-key-inner { background: color-mix(in srgb, var(--color-accent) 20%, #fff); border: 1.5px solid var(--color-text); }
.lab-sess-key-outer { background: color-mix(in srgb, var(--color-text) 16%, transparent); }
.lab-sess-key-median { width: 4px; height: 14px; background: var(--color-accent-700); }
.lab-sess-key-mean { width: 0; height: 14px; border-left: 2px dotted var(--color-text); }
.lab-sess-key-zero { width: 0; height: 14px; border-left: 1.5px dashed var(--color-text); }
.lab-sess-pnl th, .lab-sess-pnl td { white-space: nowrap; }

/* other stats */
.lab-sess-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 0 18px; margin: 0; }
.lab-sess-stat { border-top: 2px solid var(--color-text); padding: 10px 0 14px; }
.lab-sess-stat dt { font-size: 11.5px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--lab-muted); margin: 0 0 4px; }
.lab-sess-stat dd { margin: 0; }
.lab-sess-stat-value { font-family: var(--font-heading); font-weight: var(--font-heading-weight); font-size: 19px; line-height: 1.2; }
.lab-sess-stat-note { font-size: 12.5px; line-height: 18px; color: var(--lab-muted); margin-top: 4px !important; }

.lab-sess-exports { margin-top: 18px; padding: 14px; background: #fff; border: 1px solid var(--lab-line); }
.lab-sess-exports .lab-help { margin-top: 8px; }

/* — replay strip — */
.lab-sess-strip-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; overscroll-behavior-x: contain; border: 1px solid var(--lab-line); background: #fff; padding: 10px; scrollbar-width: thin; }
.lab-sess-strip-wrap:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
.lab-sess-strip { display: flex; gap: 8px; list-style: none; margin: 0; padding: 0; width: max-content; }
.lab-sess-spin { width: 136px; flex: 0 0 auto; border: 1px solid var(--lab-line); background: var(--lab-panel); padding: 8px; display: flex; flex-direction: column; gap: 6px; }
.lab-sess-spin-n { font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--lab-muted); }
.lab-sess-pocket { display: inline-flex; align-items: center; justify-content: center; width: 34px; height: 34px; color: #fff; font-family: var(--font-heading); font-weight: var(--font-heading-weight); font-size: 15px; font-feature-settings: 'tnum' 1; }
.lab-sess-pocket-red { background: var(--pocket-red); }
.lab-sess-pocket-black { background: var(--pocket-black); }
.lab-sess-pocket-green { background: var(--pocket-green); }
.lab-sess-spin-data { margin: 0; display: grid; gap: 2px; }
.lab-sess-spin-data div { display: flex; justify-content: space-between; gap: 6px; font-size: 12px; line-height: 17px; }
.lab-sess-spin-data dt { color: var(--lab-muted); }
.lab-sess-spin-data dd { margin: 0; font-weight: 600; }
.lab-sess-spin-bets { list-style: none; margin: 0; padding: 6px 0 0; border-top: 1px solid var(--lab-line); display: grid; gap: 2px; }
.lab-sess-spin-bets li { display: flex; justify-content: space-between; align-items: baseline; gap: 6px; font-size: 11.5px; line-height: 16px; }
.lab-sess-bet-name { min-width: 0; overflow-wrap: anywhere; color: var(--color-text); font-weight: 400; }
.lab-sess-spin-bets .lab-num { flex: 0 0 auto; font-weight: 600; }
.lab-sess-spin-end { width: 150px; border: 2px solid var(--color-text); background: var(--lab-caution-bg); justify-content: flex-start; }
.lab-sess-spin-end p { margin: 0; font-size: 12.5px; line-height: 18px; font-weight: 600; }
/* Layouts per level: a spin played on a customized level's own bets gets an
   ink rule on top; the "Custom" caption carries the meaning, not the rule. */
.lab-sess-spin-own { border-top: 3px solid var(--color-text); padding-top: 6px; }
.lab-sess-spin-level { white-space: nowrap; }
.lab-sess-replay-levels { margin: 0 0 10px; max-width: 80ch; }

/* "Layout by level" rule: one line per level, how it is made underneath. */
.lab-sess-rule-level { display: block; }
.lab-sess-rule-level + .lab-sess-rule-level { margin-top: 4px; }
.lab-sess-rule-how { display: block; font-size: 12px; line-height: 16px; font-weight: 400; color: var(--lab-muted); }
.lab-sess-rule-more { font-weight: 400; color: var(--lab-muted); font-size: 12.5px; }

/* — comparison — */
.lab-sess-whatifs { display: grid; gap: 12px; margin: 4px 0 14px; }
@container (min-width: 640px) {
  .lab-sess-whatifs { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
.lab-sess-whatif { border: 1px solid var(--lab-line-strong); background: #fff; margin: 0; padding: 12px 14px 2px; min-width: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 0 12px; }
.lab-sess-whatif legend { font-family: var(--font-heading); font-weight: var(--font-heading-weight); font-size: 14px; padding: 0 6px; margin-left: -6px; }
.lab-sess-amount { grid-column: auto; }
.lab-sess-compare-status:empty { display: none; }
.lab-sess-compare-status { font-weight: 600; }
.lab-sess-compare-body:empty { display: none; }
.lab-sess-compare-body { margin-top: 14px; }
.lab-sess-compare-body .lab-banner { margin-bottom: 12px; }
.lab-sess-compare-body .lab-banner .lab-btn-row { margin-top: 10px; }
.lab-sess-compare-body .lab-banner-title { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.lab-sess-cmp { min-width: 560px; }
.lab-sess-cmp-cap { margin: 0 0 8px; }
.lab-sess-cmp-wrap:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
/* The measure column stays put while the scenario columns scroll on phones. */
.lab-sess-cmp tbody th, .lab-sess-cmp thead th:first-child { position: sticky; left: 0; z-index: 1; background: var(--lab-panel); }
@media (max-width: 560px) {
  .lab-sess-cmp tbody th, .lab-sess-cmp thead th:first-child { max-width: 128px; white-space: normal; box-shadow: 1px 0 0 var(--lab-line-strong); }
}
.lab-sess-cmp thead th { vertical-align: bottom; text-transform: none; letter-spacing: 0; }
.lab-sess-cmp thead th:first-child { text-transform: uppercase; letter-spacing: 0.05em; }
.lab-sess-cmp-name { display: block; font-family: var(--font-heading); font-weight: var(--font-heading-weight); font-size: 14px; color: var(--color-text); }
.lab-sess-cmp-label { display: block; font-size: 12px; font-weight: 400; color: var(--lab-muted); margin-top: 2px; }
.lab-sess-cmp tbody th { font-size: 13px; font-weight: 600; text-transform: none; letter-spacing: 0; color: var(--color-text); border-bottom: 1px solid var(--lab-line); padding-right: 14px; }
.lab-sess-cmp td { white-space: nowrap; }
.lab-sess-cmp td:nth-child(2), .lab-sess-cmp thead th:nth-child(2) { background: color-mix(in srgb, var(--color-text) 4%, transparent); }
.lab-sess-cmp-main { font-weight: 700; }
.lab-sess-cmp-ci { display: block; font-size: 11.5px; color: var(--lab-muted); }
.lab-sess-cmp-notes { margin: 12px 0 0; padding-left: 18px; font-size: 13px; line-height: 20px; color: color-mix(in srgb, var(--color-text) 82%, transparent); }
.lab-sess-cmp-notes li + li { margin-top: 4px; }

.lab-sess-empty { border-top: 3px solid var(--lab-line-strong); }
.lab-sess-empty .lab-card-sub { margin: 0; }

@media (max-width: 560px) {
  .lab-sess-run { min-width: 0; flex: 1 1 100%; }
  .lab-sess-actions .lab-sess-cancel { flex: 1 1 100%; }
  .lab-sess-res .lab-card, .lab-sess .lab-card { padding: 14px; }
  .lab-sess-rule { grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr); }
}

/* Screen-reader-only text is absolutely positioned: keep its containing block
   inside each scroll container, or it escapes the clip and widens the page. */
.lab-sess .lab-table-wrap, .lab-sess-strip-wrap, .lab-sess-spin, .lab-sess-pocket { position: relative; }
@media (prefers-reduced-motion: reduce) {
  .lab-sess-bar-fill { transition: none; }
}