.lab-workspace {
  --lab-blue: var(--accent, var(--green, #3459df));
  --lab-accent: #c96d24;
  --lab-surface: var(--surface, #f7f8fb);
  --lab-blue-soft: #eef3ff;
  color: var(--ink, #202938);
  font-size: 15px;
  line-height: 1.9;
  max-width: 1180px;
  margin: 0 auto;
  padding: 8px 0 30px;
  container-type: inline-size;
  container-name: labs;
}
.lab-workspace * { box-sizing: border-box; }
.lab-workspace button, .lab-workspace select, .lab-workspace input { font: inherit; }
.lab-intro { padding: 8px 0 24px; }
.lab-eyebrow, .lab-kicker, .lab-note-label { font-size: 12px; font-weight: 600; letter-spacing: .07em; color: var(--muted, #687386); }
.lab-intro h1 { font-size: 34px; line-height: 1.35; font-weight: 700; letter-spacing: -.035em; margin: 10px 0 12px; }
.lab-intro p { font-size: 15px; color: var(--muted, #687386); line-height: 1.9; margin: 0; }
.lab-tabs { display: flex; border-bottom: 1px solid var(--line, #e5e9f0); gap: 26px; margin-bottom: 30px; overflow: auto; }
.lab-tab { appearance: none; border: 0; background: transparent; white-space: nowrap; padding: 14px 2px; color: var(--muted, #687386); font-size: 14px; cursor: pointer; border-bottom: 2px solid transparent; margin-bottom: -1px; }
.lab-tab span { font-size: 12px; font-variant-numeric: tabular-nums; margin-right: 7px; color: #8490a3; }
.lab-tab.is-active { border-bottom-color: var(--lab-blue); color: var(--lab-blue); font-weight: 600; }
.lab-tab.is-active span { color: var(--lab-blue); }
.lab-panel[hidden] { display: none !important; }
.lab-section-heading { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.lab-section-heading h2 { font-size: 24px; font-weight: 650; letter-spacing: -.025em; line-height: 1.45; margin: 7px 0 0; }
.lab-formula { background: var(--lab-surface); color: var(--ink, #202938); border: 1px solid var(--line, #e5e9f0); border-radius: 6px; font-family: Georgia, 'Times New Roman', serif; font-size: 18px; padding: 10px 16px; white-space: nowrap; }
.lab-lead { max-width: 850px; font-size: 15px; line-height: 1.9; color: var(--muted, #687386); margin: 16px 0 25px; }
.lab-split { display: grid; grid-template-columns: minmax(0, 1.7fr) minmax(290px, 1fr); gap: 20px; }
.lab-chart-card, .lab-control-card, .lab-matrix-card { background: var(--paper, #fff); border: 1px solid var(--line, #e5e9f0); border-radius: 8px; }
.lab-chart-card { min-width: 0; padding: 22px 18px 16px; }
.lab-chart-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; font-size: 14px; font-weight: 600; padding: 0 5px; margin-bottom: 16px; }
.lab-legend { display: inline-flex; gap: 7px; align-items: center; font-size: 12px; font-weight: 400; color: var(--muted, #687386); white-space: nowrap; }
.lab-legend i { width: 8px; height: 8px; border-radius: 50%; background: var(--lab-accent); display: inline-block; }
.lab-svg { display: block; width: 100%; overflow: visible; }
.lab-gridline { stroke: #edf0f5; stroke-width: 1; }
.lab-axis { stroke: #bdc7d6; stroke-width: 1; }
.lab-curve { fill: none; stroke: var(--lab-blue); stroke-width: 2.8; stroke-linecap: round; stroke-linejoin: round; }
.lab-trace { fill: none; stroke: var(--lab-accent); stroke-width: 1.8; stroke-dasharray: 4 4; opacity: .9; }
.lab-trace-point { fill: #d49360; stroke: #fff; stroke-width: 1.5; }
.lab-current-point { fill: var(--lab-accent); stroke: #fff; stroke-width: 3; }
.lab-minimum { fill: var(--lab-blue); stroke: #fff; stroke-width: 1; }
.lab-tick { font-family: inherit; font-size: 12px; fill: var(--muted, #687386); }
.lab-axis-label { font-family: Georgia, serif; font-size: 14px; fill: var(--ink, #202938); }
.lab-optimum-label { font-size: 12px; fill: var(--lab-blue); }
.lab-chart-caption { font-size: 12px; color: var(--muted, #687386); line-height: 1.9; text-align: center; margin: 12px 4px 0; }
.lab-control-card { background: var(--lab-surface); padding: 23px 21px 17px; display: flex; flex-direction: column; }
.lab-control-card h3 { font-size: 16px; font-weight: 600; margin: 0 0 24px; }
.lab-range-label { display: flex; align-items: center; justify-content: space-between; font-size: 14px; gap: 16px; margin: 0 0 12px; }
.lab-range-label output { font-size: 16px; font-variant-numeric: tabular-nums; font-weight: 600; color: var(--lab-blue); background: #e9efff; border-radius: 4px; padding: 2px 10px; }
.lab-workspace input[type=range] { width: 100%; accent-color: var(--lab-blue); height: 24px; cursor: pointer; margin: 0; min-width: 0; }
.lab-range-ends { display: flex; justify-content: space-between; font-size: 12px; color: var(--muted, #687386); margin: 7px 0 12px; }
.lab-small { font-size: 13px; line-height: 1.9; color: var(--muted, #687386); margin: 8px 0; }
.lab-actions { display: flex; gap: 9px; margin: 17px 0 7px; }
.lab-button { display: inline-flex; justify-content: center; align-items: center; gap: 12px; min-height: 42px; flex: 1; border: 1px solid #d8dfeb; border-radius: 6px; background: var(--paper, #fff); color: var(--ink, #202938); font-size: 14px !important; font-weight: 500 !important; cursor: pointer; padding: 8px 10px; white-space: nowrap; }
.lab-button-primary { background: var(--lab-blue); color: #fff; border-color: var(--lab-blue); }
.lab-button:hover { background: #edf1f8; border-color: #b9c6dc; }
.lab-button-primary:hover { background: #2848bf; border-color: #2848bf; }
.lab-reset { background: none; border: 0; color: var(--muted, #687386); font-size: 12px !important; text-align: center; cursor: pointer; padding: 9px 6px; margin-bottom: 14px; }
.lab-reset:hover { color: var(--lab-blue); }
.lab-stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--line, #e5e9f0); padding: 18px 0 0; margin-top: auto; gap: 10px; }
.lab-stats div { display: flex; flex-direction: column; gap: 8px; min-width: 0; }
.lab-stats span { font-size: 12px; color: var(--muted, #687386); }
.lab-stats strong { font-size: 22px; font-weight: 500; font-family: ui-monospace, SFMono-Regular, Consolas, monospace; overflow-wrap: anywhere; line-height: 1.3; font-variant-numeric: tabular-nums; }
.lab-status { font-size: 12px; line-height: 1.9; color: var(--lab-blue); min-height: 36px; margin: 14px 0 0; }
.lab-status-warning { color: #a45416; }
.lab-explain-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 24px; }
.lab-note { padding: 23px 24px; background: var(--lab-surface); border-radius: 6px; border: 1px solid var(--line, #e5e9f0); border-left: 3px solid #b1c2f7; }
.lab-note-observe { background: #f7f9ff; border-color: #e5eafa; border-left-color: var(--lab-blue); }
.lab-note-label { font-size: 12px; letter-spacing: .03em; }
.lab-note h3 { font-size: 16px; font-weight: 600; line-height: 1.6; margin: 8px 0 12px; }
.lab-note p { font-size: 15px; color: #526074; line-height: 1.9; margin: 9px 0 0; }
.lab-note .lab-small { font-size: 13px; color: var(--muted, #687386); }
.lab-note .lab-math { font-family: Georgia, 'Times New Roman', serif; font-size: 19px; letter-spacing: .015em; color: var(--ink, #202938); margin: 7px 0 11px; }
.lab-conv-toolbar { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; font-size: 14px; margin: 4px 0 22px; }
.lab-conv-toolbar label { font-weight: 500; }
.lab-conv-toolbar select { background: var(--paper, #fff); color: var(--ink, #202938); border: 1px solid var(--line, #e5e9f0); border-radius: 6px; padding: 9px 28px 9px 12px; font-size: 14px; cursor: pointer; min-height: 42px; }
.lab-conv-toolbar > span { color: var(--muted, #687386); font-size: 12px; padding-left: 12px; border-left: 1px solid var(--line, #e5e9f0); }
.lab-conv-stage { display: grid; grid-template-columns: minmax(0, 1.15fr) 16px minmax(0, .85fr) 16px minmax(0, 1fr); align-items: center; gap: 12px; }
.lab-matrix-card { padding: 21px 17px 16px; min-width: 0; align-self: stretch; }
.lab-matrix-title { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 5px 8px; margin-bottom: 20px; }
.lab-matrix-title h3 { font-size: 15px; font-weight: 600; margin: 0; }
.lab-matrix-title > span { font-size: 12px; color: var(--muted, #687386); }
.lab-matrix { display: grid; gap: 5px; max-width: 270px; margin: 0 auto; }
.lab-matrix-input { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.lab-matrix-three { grid-template-columns: repeat(3, minmax(0, 1fr)); max-width: 230px; }
.lab-cell { display: flex; justify-content: center; align-items: center; aspect-ratio: 1; font-variant-numeric: tabular-nums; font-size: 16px; border-radius: 4px; min-width: 0; line-height: 1.2; }
.lab-input-cell { background: color-mix(in srgb, #a4adbc calc(var(--lab-shade) * 60% + 8%), #f7f8fb); color: #435068; border: 2px solid transparent; }
.lab-input-cell.is-window { border-color: #8099eb; color: #263f8b; background: color-mix(in srgb, #a3b6ef calc(var(--lab-shade) * 60% + 12%), #f7f9ff); }
.lab-kernel-cell { background: var(--lab-blue-soft); color: #304eae; border: 1px solid #dce5fd; font-family: ui-monospace, SFMono-Regular, Consolas, monospace; }
.lab-kernel-cell.is-negative { background: #f0eef7; color: #66518d; border-color: #e1dced; }
.lab-output-cell { border: 1px solid var(--line, #e5e9f0); background: var(--lab-surface); color: #304eae; cursor: pointer; transition: background .15s, border-color .15s; }
.lab-output-cell:hover { background: #e9efff; border-color: #9caee4; }
.lab-output-cell.is-selected { background: var(--lab-blue); color: #fff; border-color: var(--lab-blue); box-shadow: 0 0 0 3px #e5ecff; }
.lab-conv-sign { font-size: 24px; font-weight: 300; color: #8a96aa; text-align: center; }
.lab-matrix-card > .lab-small { text-align: center; font-size: 12px; margin: 15px 0 0; }
.lab-kernel-card .lab-matrix-title { flex-wrap: wrap; }
.lab-calculation { background: var(--paper, #fff); border: 1px solid var(--line, #e5e9f0); border-radius: 8px; padding: 22px 24px; margin-top: 20px; }
.lab-calculation-heading { display: flex; align-items: center; justify-content: space-between; gap: 15px; margin-bottom: 20px; }
.lab-calculation-heading > strong { font-size: 14px; font-weight: 500; color: var(--lab-blue); }
.lab-products { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; font-size: 14px; line-height: 2; }
.lab-product { display: inline-flex; align-items: center; gap: 6px; padding: 3px 8px; background: var(--lab-surface); border: 1px solid var(--line, #e5e9f0); border-radius: 4px; font-variant-numeric: tabular-nums; }
.lab-product b { font-weight: 500; }
.lab-product > span, .lab-plus { color: #8792a5; }
.lab-product-result { display: inline-flex; align-items: center; gap: 9px; padding: 2px 8px; color: var(--lab-blue); font-variant-numeric: tabular-nums; }
.lab-product-result strong { font-size: 23px; font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-weight: 500; }
.lab-calculation > .lab-small { margin-top: 16px; }
.lab-function-options { display: flex; gap: 6px; margin: 0 0 26px; }
.lab-function { flex: 1; border: 1px solid #d8dfeb; border-radius: 5px; background: var(--paper, #fff); color: var(--muted, #687386); font-size: 14px !important; padding: 9px 8px; min-height: 42px; cursor: pointer; }
.lab-function.is-active { background: var(--lab-blue); color: #fff; border-color: var(--lab-blue); }
.lab-stats-two { grid-template-columns: 1fr 1fr; margin: 25px 0 16px; }
.lab-stats-two strong { font-size: 25px; }
.lab-stats strong.lab-stat-text { font-family: inherit; font-size: 15px; }
.lab-footnote { font-size: 12px; line-height: 1.9; color: var(--muted, #687386); border-top: 1px solid var(--line, #e5e9f0); padding-top: 20px; margin: 30px 0 0; }
.lab-workspace button:focus-visible, .lab-workspace select:focus-visible, .lab-workspace input:focus-visible { outline: 2px solid var(--lab-blue); outline-offset: 4px; }
.lab-workspace button:disabled { opacity: .5; cursor: default; }

/* Fit the available article width, including space taken by the site sidebar. */
@container labs (max-width: 1000px) {
  .lab-matrix-title { display: block; }
  .lab-matrix-title > span { display: block; margin-top: 5px; }
  .lab-matrix-card { padding: 20px 14px 16px; }
  .lab-conv-stage { gap: 9px; grid-template-columns: minmax(0, 1.1fr) 12px minmax(0, .85fr) 12px minmax(0, 1fr); }
  .lab-control-card { padding: 22px 19px 17px; }
}
@container labs (max-width: 880px) {
  .lab-split { grid-template-columns: 1fr; }
  .lab-control-card { padding: 23px; }
  .lab-stats { margin-top: 12px; }
  .lab-control-card h3 { margin-bottom: 21px; }
  .lab-stats-two { margin: 24px 0 16px; }
  .lab-note { padding: 22px; }
  .lab-explain-grid { gap: 16px; }
}
@container labs (max-width: 720px) {
  .lab-conv-stage { grid-template-columns: 1fr; gap: 10px; }
  .lab-matrix-card { padding: 21px 24px 18px; }
  .lab-matrix-title { display: flex; margin-bottom: 18px; }
  .lab-matrix-title > span { display: inline; margin: 0; }
  .lab-matrix { max-width: 290px; gap: 6px; }
  .lab-kernel-card .lab-matrix, .lab-matrix-three { max-width: 230px; }
  .lab-cell { font-size: 17px; }
  .lab-conv-sign { font-size: 23px; line-height: 1.2; }
}
@container labs (max-width: 600px) {
  .lab-intro { padding: 3px 0 20px; }
  .lab-intro h1 { font-size: 28px; }
  .lab-tabs { gap: 20px; margin-bottom: 25px; }
  .lab-tab { padding: 13px 0; font-size: 14px; }
  .lab-tab span { margin-right: 5px; }
  .lab-section-heading { align-items: flex-start; gap: 13px; flex-direction: column; }
  .lab-section-heading h2 { font-size: 23px; }
  .lab-formula { font-size: 18px; padding: 9px 13px; }
  .lab-explain-grid { grid-template-columns: 1fr; }
  .lab-chart-card { padding: 20px 12px 16px; }
  .lab-chart-top { padding: 0; font-size: 14px; }
  .lab-tick, .lab-optimum-label { font-size: 15px; }
  .lab-axis-label { font-size: 16px; }
  .lab-chart-caption { text-align: left; margin-top: 13px; }
  .lab-control-card { padding: 22px 19px 17px; }
  .lab-button, .lab-function { min-height: 44px; }
  .lab-conv-toolbar { gap: 10px 12px; margin-bottom: 20px; }
  .lab-conv-toolbar > span { padding-left: 10px; }
  .lab-calculation { padding: 20px 18px; }
  .lab-calculation-heading { margin-bottom: 17px; }
  .lab-products { gap: 6px; }
  .lab-product { padding: 3px 6px; gap: 5px; }
}
@container labs (max-width: 380px) {
  .lab-tabs { gap: 14px; }
  .lab-tab { font-size: 13px; }
  .lab-tab span { margin-right: 4px; }
  .lab-section-heading h2 { font-size: 22px; }
  .lab-chart-top { flex-wrap: wrap; gap: 6px 12px; }
  .lab-stats { gap: 7px; }
  .lab-stats strong { font-size: 20px; }
  .lab-note { padding: 20px; }
  .lab-matrix-card { padding: 20px 19px 17px; }
  .lab-calculation-heading { flex-wrap: wrap; gap: 5px 12px; }
}
@media (prefers-reduced-motion: reduce) {
  .lab-workspace * { transition: none !important; }
}