.qe-article{--bg:#090c0e;--paper:#f2f1ec;--muted:#b2b7bb;--line:#363c40;--gold:#d7bd86;--cyan:#85d6dc;--red:#e6a497;--panel:#11171a}.qe-article *{box-sizing:border-box}.qe-article{scroll-behavior:smooth;scroll-padding-top:25px}.qe-article{margin:0;background:var(--bg);color:var(--paper);font:17px/1.75 Arial,Helvetica,sans-serif}.qe-article a{color:var(--gold);text-underline-offset:4px}.qe-article a:hover{color:var(--paper)}.qe-article a:focus-visible,.qe-article button:focus-visible,.qe-article input:focus-visible,.qe-article textarea:focus-visible{outline:3px solid var(--cyan);outline-offset:4px}.qe-article .wrap{max-width:1160px;margin:auto;padding:32px clamp(20px,5vw,66px)}.qe-article .mast{display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;padding-bottom:18px;border-bottom:1px solid var(--line);font:11px/1.7 Consolas,monospace;letter-spacing:.1em}.qe-article .mast nav{display:flex;gap:18px;flex-wrap:wrap}.qe-article .eyebrow{color:var(--gold);font:12px/1.7 Consolas,monospace;letter-spacing:.12em;margin-top:43px}.qe-article h1{font:400 clamp(44px,7vw,84px)/1.06 Georgia,'Times New Roman',serif;letter-spacing:-.045em;max-width:900px;margin:19px 0 24px}.qe-article h2{font:400 clamp(27px,4vw,39px)/1.18 Georgia,serif;letter-spacing:-.025em;margin:63px 0 23px;scroll-margin-top:30px}.qe-article h3{font-size:18px;font-weight:500;color:var(--gold);margin:30px 0 12px}.qe-article p,.qe-article li{max-width:760px}.qe-article p{margin:0 0 21px}.qe-article .lead{font:400 24px/1.5 Georgia,serif;max-width:750px;color:var(--muted);margin-bottom:30px}.qe-article .meta{font:12px/1.7 Consolas,monospace;color:var(--muted)}.qe-article .layout{display:grid;grid-template-columns:minmax(0,1fr) 220px;gap:60px;margin-top:44px}.qe-article .text{min-width:0}.qe-article .toc{align-self:start;position:sticky;top:28px;border-top:1px solid var(--gold);padding-top:14px;font-size:13px;line-height:1.5}.qe-article .toc ol{padding-left:19px}.qe-article .toc li{margin:0 0 11px}.qe-article .toc a{color:var(--muted)}.qe-article ul,.qe-article ol{padding-left:24px}.qe-article li{margin-bottom:10px}.qe-article strong{font-weight:600}.qe-article code{font:14px/1.6 Consolas,monospace;color:var(--gold);overflow-wrap:anywhere}.qe-article figure{margin:34px 0 39px;padding:24px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);break-inside:avoid}.qe-article figure h3{color:var(--paper);font:26px/1.25 Georgia,serif;margin:9px 0 20px}.qe-article .figmeta{font:11px/1.6 Consolas,monospace;color:var(--muted);letter-spacing:.03em}.qe-article .figcaption{font-size:13px;color:var(--muted);margin:16px 0 0}.qe-article .legend{display:flex;flex-wrap:wrap;gap:15px;font-size:13px}.qe-article .legend span::before{content:'';display:inline-block;width:18px;height:2px;background:var(--gold);vertical-align:middle;margin-right:7px}.qe-article .legend span+span::before{background:var(--cyan)}.qe-article .chart{display:block;width:100%;max-width:660px;height:auto;margin-top:15px}.qe-article .chart text{fill:var(--muted);font:14px Arial,sans-serif}.qe-article .axis{display:flex;justify-content:space-between;font:12px/1.5 Consolas,monospace;color:var(--muted);margin-top:8px}.qe-article .nodes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:20px 0}.qe-article .node{border-top:2px solid var(--gold);padding-top:14px;overflow-wrap:anywhere;font-size:14px}.qe-article .node b{display:block;font:12px/1.4 Consolas,monospace;color:var(--muted);margin-bottom:10px}.qe-article .tiles{display:grid;grid-template-columns:repeat(6,1fr);gap:8px}.qe-article .tile{min-height:54px;display:grid;place-items:center;color:#090c0e;font:14px/1.5 Consolas,monospace;background:var(--cyan)}.qe-article .tile.known{background:#41494d;color:var(--paper)}.qe-article .tile.gap{background:var(--red)}.qe-article .counts{display:flex;flex-wrap:wrap;gap:12px;margin:22px 0}.qe-article .mark{width:30px;height:30px;border:2px solid var(--cyan)}.qe-article .mark.in{background:var(--gold);border-color:var(--gold)}.qe-article .notice{border-left:2px solid var(--gold);padding-left:18px;color:var(--muted)}.qe-article .labsection{margin:55px 0;border-top:1px solid var(--line);padding-top:10px}.qe-article .labsection label{display:block;font-size:14px;margin:14px 0 6px}.qe-article .labsection textarea{width:100%;min-height:230px;resize:vertical;background:var(--panel);color:var(--paper);border:1px solid var(--line);padding:15px;font:14px/1.55 Consolas,monospace}.qe-article .labsection input{display:block;width:100%;padding:12px;background:var(--panel);color:var(--paper);border:1px solid var(--line);font-size:16px}.qe-article .fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px 24px}.qe-article button{background:var(--gold);color:#090c0e;padding:13px 23px;border:0;font:500 15px Arial,sans-serif;cursor:pointer;margin:16px 0}.qe-article output{display:block;white-space:pre-wrap;font:15px/1.9 Consolas,monospace;background:var(--panel);padding:19px;border-left:2px solid var(--cyan);overflow-wrap:anywhere}.qe-article output[data-status=invalid]{border-color:var(--red)}.qe-article .footer{border-top:1px solid var(--line);padding-top:20px;margin-top:60px;font-size:12px;color:var(--muted)}.qe-article .editions{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}.qe-article .edition-card{padding:18px 0;border-top:1px solid var(--gold)}.qe-article .edition-card h2{margin:10px 0 18px}.qe-article .skip{position:absolute;left:-9999px}.qe-article .skip:focus{left:20px;top:10px;background:var(--bg);padding:10px;z-index:2}@media(max-width:820px){.qe-article .layout{grid-template-columns:1fr;gap:20px}.qe-article .toc{position:static;grid-row:1}.qe-article .toc ol{columns:2;column-gap:28px}.qe-article .text{grid-row:2}.qe-article .editions{grid-template-columns:1fr}}@media(max-width:460px){.qe-article{font-size:16px}.qe-article .wrap{padding:23px 18px}.qe-article .toc ol{columns:1}.qe-article .nodes{grid-template-columns:1fr}.qe-article .fields{grid-template-columns:1fr}.qe-article .tiles{grid-template-columns:repeat(3,1fr)}.qe-article h1{font-size:46px}.qe-article .lead{font-size:22px}}@media(prefers-reduced-motion:reduce){.qe-article{scroll-behavior:auto}}@media print{.qe-article{--bg:#fff;--paper:#111;--muted:#333;--line:#ccc;--gold:#775e25;--cyan:#00616b;--red:#8d3229;--panel:#f5f5f5}.qe-article{font-size:11pt}.qe-article .wrap{padding:0;max-width:none}.qe-article .mast nav,.qe-article .toc,.qe-article button{display:none}.qe-article .layout{display:block}.qe-article .text{max-width:none}.qe-article h1{font-size:36pt}.qe-article h2{font-size:23pt;break-after:avoid}.qe-article a{color:#111}.qe-article .tile{color:#fff}.qe-article figure{page-break-inside:avoid}.qe-article textarea{min-height:170px}.qe-article footer{position:static}}.qe-article .research-methods{margin:36px 0}.qe-article .method-chain{list-style:none;padding:0;margin:24px 0;display:grid;grid-template-columns:1fr;gap:22px}.qe-article .method-chain li{position:relative;border-top:2px solid #bca06a;padding:14px 0}.qe-article .method-chain h3{margin:0 0 14px;font-size:20px}.qe-article .method-number{color:#dac18a;font:14px ui-monospace,monospace}.qe-article .method-chain li:not(:last-child)::after{content:'↓';display:block;color:#dac18a;font-size:23px;margin-top:10px}.qe-article .research-methods dt{font-weight:700;color:#dac18a;margin:12px 0 3px}.qe-article .research-methods dd{margin:0}.qe-article .temporal-example{margin:24px 0}.qe-article .temporal-example figcaption{font-size:14px;line-height:1.6}.qe-article .temporal-row{border-top:1px solid #434b3e;margin-top:22px;padding-top:10px}.qe-article .time-cells{display:grid;grid-template-columns:repeat(8,minmax(0,1fr));gap:5px;list-style:none;padding:0;margin:16px 0}.qe-article .time-cells li{border:1px solid #6d756e;text-align:center;padding:8px 0;color:#f2eee2}.qe-article .time-cells span,.qe-article .time-cells strong{display:block}.qe-article .time-cells span{font:11px ui-monospace,monospace}.qe-article .time-train{background:#263c32}.qe-article .time-test{background:#343347}.qe-article .time-purged{background:#513522}.qe-article .time-unused{background:#202722}.qe-article .case-decisions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}.qe-article .case-decisions dl{padding:8px 0;border-top:1px solid #665b3c}@media(max-width:700px){.qe-article .method-chain,.qe-article .case-decisions{grid-template-columns:1fr}.qe-article .time-cells{gap:3px}.qe-article .time-cells li{padding:5px 0}.qe-article .method-chain h3{font-size:19px}}@media print{.qe-article .research-methods dt,.qe-article .method-number{color:#333}.qe-article .time-cells li{color:#111;background:white}.qe-article .method-chain li{break-inside:avoid}}