:root {
  --desk-bg: #080b09;
  --desk-bg-2: #0d120f;
  --desk-panel: #121814;
  --desk-text: #efe9d8;
  --desk-muted: #9ca69c;
  --desk-line: #303a32;
  --desk-line-hot: #586358;
  --acid: #d8ff3f;
  --mint: #70e1bd;
  --amber: #ffbd59;
  --red: #ff6f61;
  --violet: #d6a4ff;
  --indexed: #73b9ff;
  --desk-grid-strong: #ffffff10;
  --desk-grid-soft: #ffffff07;
  --mono: "IBM Plex Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --display: "Arial Narrow", "Roboto Condensed", Impact, sans-serif;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, serif;
}

:root[data-cd-theme="light"] {
  --desk-bg: #f2efe7;
  --desk-bg-2: #e9e5dc;
  --desk-panel: #fbf9f3;
  --desk-text: #171b1e;
  --desk-muted: #59636c;
  --desk-line: #c8c2b5;
  --desk-line-hot: #737b84;
  --acid: #526a00;
  --mint: #087a55;
  --amber: #8b5b00;
  --red: #b4233a;
  --violet: #7a3d9c;
  --indexed: #075d8b;
  --desk-grid-strong: #171b1e14;
  --desk-grid-soft: #171b1e0a;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--desk-text);
  background: var(--desk-bg);
  font-family: var(--serif);
  background-image: linear-gradient(90deg, transparent 49.9%, var(--desk-grid-strong) 50%, transparent 50.1%), repeating-linear-gradient(0deg, transparent 0 79px, var(--desk-grid-soft) 80px);
}
a { color: inherit; }
button, select, input { font: inherit; }
.skip { position: fixed; top: -5rem; left: 1rem; z-index: 50; padding: .8rem 1rem; color: var(--desk-bg); background: var(--acid); font: 800 12px var(--mono); }
.skip:focus { top: 1rem; }
.ticker { height: 32px; display: flex; align-items: center; justify-content: space-around; gap: 4rem; overflow: hidden; color: var(--desk-bg); background: var(--acid); font: 900 10px var(--mono); letter-spacing: .13em; white-space: nowrap; }

.mast { min-height: 690px; display: grid; grid-template-columns: minmax(0, 1fr) 310px; gap: clamp(2rem, 6vw, 6rem); align-items: end; padding: clamp(4rem, 9vw, 8rem) clamp(1rem, 5vw, 5rem) 4rem; border-bottom: 1px solid var(--desk-line); }
.eyebrow, .section-head > div > p, .card-index { margin: 0; color: var(--acid); font: 800 10px var(--mono); letter-spacing: .16em; text-transform: uppercase; }
h1 { margin: 2rem 0 3rem; font: 900 clamp(5rem, 15vw, 13rem)/.66 var(--display); letter-spacing: -.055em; }
h1 em { color: transparent; font-style: normal; -webkit-text-stroke: 1px var(--desk-text); }
.dek { max-width: 760px; margin: 0; color: var(--desk-muted); font-size: clamp(1.05rem, 2vw, 1.4rem); line-height: 1.5; }
.tape { display: grid; align-self: stretch; align-content: end; border: 1px solid var(--desk-line); border-top: 6px solid var(--acid); background: color-mix(in srgb, var(--desk-bg) 94%, transparent); }
.tape > div { display: grid; grid-template-columns: 1fr auto; gap: .5rem; padding: 1.2rem; border-bottom: 1px solid var(--desk-line); }
.tape span, .metric-strip span, .model-output > span, .comparison article span, .callout span { color: var(--desk-muted); font: 800 9px var(--mono); letter-spacing: .1em; text-transform: uppercase; }
.tape strong { color: var(--desk-text); font: 800 1.15rem var(--mono); }
.tape small { grid-column: 1/-1; color: var(--desk-muted); font: 10px/1.45 var(--mono); }
.tape .snapshot { grid-template-columns: auto 1fr; align-items: center; border: 0; }
.lamp { display: inline-block; width: 8px; height: 8px; flex: 0 0 auto; border-radius: 50%; background: var(--desk-muted); }
.lamp.good { background: var(--acid); box-shadow: 0 0 14px var(--acid); }
.lamp.stale { background: var(--amber); }
.lamp.bad { background: var(--red); }

nav { position: sticky; top: var(--cd-site-shell-height, 0px); z-index: 20; display: flex; gap: 2rem; overflow-x: auto; padding: 1rem clamp(1rem, 5vw, 5rem); border-bottom: 1px solid var(--desk-line); background: color-mix(in srgb, var(--desk-bg) 95%, transparent); scrollbar-width: thin; }
nav a, .sources a { color: var(--desk-text); font: 800 10px var(--mono); letter-spacing: .09em; text-decoration: none; text-transform: uppercase; white-space: nowrap; }
nav a:hover, nav a:focus-visible, .sources a:hover { color: var(--acid); }
main { max-width: 1560px; margin: auto; }
.method-strip { display: flex; align-items: center; gap: 2rem; margin: 2rem clamp(1rem, 5vw, 5rem) 0; padding: 1.1rem 1.25rem; border: 1px solid var(--desk-line); font: 11px/1.8 var(--mono); }
.method-strip > b { color: var(--acid); font-size: 10px; white-space: nowrap; }
.method-strip p { margin: 0; }
.tag { display: inline-block; padding: .22rem .4rem; border: 1px solid; font: 800 8px var(--mono); letter-spacing: .08em; text-transform: uppercase; vertical-align: middle; }
.tag.observed { color: var(--mint); }
.tag.indexed { color: var(--indexed); }
.tag.documented { color: var(--amber); }
.tag.assumption { color: var(--violet); }
.tag.modeled { color: var(--acid); }

.section { padding: clamp(4rem, 8vw, 8rem) clamp(1rem, 5vw, 5rem); border-bottom: 1px solid var(--desk-line); }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 2rem; margin-bottom: 3rem; }
.section-head h2 { max-width: 1050px; margin: .85rem 0 0; font: 900 clamp(2.8rem, 6.5vw, 6.5rem)/.86 var(--display); letter-spacing: -.045em; }
.head-note { max-width: 370px; margin: 0; color: var(--desk-muted); font: 11px/1.6 var(--mono); }
.fine { color: var(--desk-muted); font: 10px/1.6 var(--mono); }

.queue-key { display: flex; gap: 1rem; color: var(--desk-muted); font: 800 9px var(--mono); text-transform: uppercase; }
.queue-key span { display: flex; align-items: center; gap: .4rem; }
.dot { display: inline-block; width: 7px; height: 7px; border-radius: 50%; }
.dot.optimize { background: var(--acid); }
.dot.watch { background: var(--amber); }
.dot.avoid { background: var(--red); }
.decision-board { border-top: 1px solid var(--desk-line); }
.decision { display: grid; grid-template-columns: 60px minmax(0, 1fr) minmax(190px, 28%); gap: 1.5rem; align-items: center; padding: 1.5rem 0; border-bottom: 1px solid var(--desk-line); }
.decision.optimize { box-shadow: inset 3px 0 var(--acid); }
.decision.watch { box-shadow: inset 3px 0 var(--amber); }
.decision.avoid { box-shadow: inset 3px 0 var(--red); }
.decision-rank { color: var(--desk-line-hot); font: 400 2rem var(--mono); text-align: center; }
.decision h3 { margin: .65rem 0 .25rem; font-size: 1.4rem; }
.decision p { margin: 0; color: var(--desk-muted); line-height: 1.45; }
.decision-metric { display: grid; justify-items: end; gap: .4rem; text-align: right; }
.decision-metric strong { font: 800 1.35rem var(--mono); }
.decision-metric span { color: var(--desk-muted); font: 9px var(--mono); text-transform: uppercase; }
.verdict { display: inline-flex; align-items: center; gap: .4rem; font: 900 8px var(--mono); letter-spacing: .11em; text-transform: uppercase; }
.verdict.optimize { color: var(--acid); }
.verdict.watch { color: var(--amber); }
.verdict.avoid { color: var(--red); }
.positive { color: var(--acid) !important; }
.negative { color: var(--red) !important; }

.strategy { background: var(--desk-bg-2); }
.section-head button { padding: .85rem 1.1rem; border: 1px solid var(--desk-line); color: var(--desk-text); background: var(--desk-panel); font: 800 10px var(--mono); text-transform: uppercase; cursor: pointer; }
.section-head button:hover, .section-head button:focus-visible { border-color: var(--acid); color: var(--acid); }
.strategy-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1px; border: 1px solid var(--desk-line); background: var(--desk-line); }
.control { min-width: 0; display: grid; grid-template-columns: 1fr auto; gap: .9rem; padding: 1.2rem; background: var(--desk-bg); }
.control label, .calc-controls label { color: var(--desk-text); font: 800 10px var(--mono); letter-spacing: .04em; }
.control output, .calc-controls output { color: var(--acid); font: 800 11px var(--mono); }
.control input { grid-column: 1/-1; width: 100%; }
.hero-control { grid-column: span 2; padding: 1.5rem; }
.hero-control label { display: flex; align-items: center; gap: .5rem; }
select { grid-column: 1/-1; width: 100%; padding: .8rem; border: 1px solid var(--desk-line); border-radius: 0; color: var(--desk-text); background: var(--desk-panel); font: 800 12px var(--mono); }
input[type="range"] { accent-color: var(--acid); }
.formula { display: grid; grid-template-columns: 170px 1fr; gap: .7rem 1rem; margin-top: 2rem; font: 10px/1.5 var(--mono); }
.formula span { color: var(--desk-muted); }
code { color: var(--acid); font-family: var(--mono); overflow-wrap: anywhere; }

.metric-strip { display: grid; grid-template-columns: repeat(4, 1fr); margin: 2rem 0; border: 1px solid var(--desk-line); background: var(--desk-line); gap: 1px; }
.metric-strip article { min-width: 0; padding: 1.5rem; background: var(--desk-panel); }
.metric-strip strong { display: block; margin: 1rem 0 .45rem; color: var(--desk-text); font: 800 clamp(1.15rem, 2.5vw, 2rem) var(--mono); letter-spacing: -.04em; }
.metric-strip small { display: block; color: var(--desk-muted); font: 10px/1.45 var(--mono); }
.table-wrap { max-width: 100%; overflow-x: auto; border: 1px solid var(--desk-line); }
table { width: 100%; min-width: 780px; border-collapse: collapse; font-family: var(--mono); }
th { padding: .9rem 1rem; color: var(--desk-muted); background: var(--desk-bg-2); font-size: 8px; letter-spacing: .1em; text-align: left; text-transform: uppercase; }
td { padding: 1rem; border-top: 1px solid var(--desk-line); color: var(--desk-text); font-size: 11px; }
td strong { color: var(--desk-text); }
td small { display: block; margin-top: .3rem; color: var(--desk-muted); font-size: 8px; }
tr.selected { background: color-mix(in srgb, var(--acid) 7%, transparent); box-shadow: inset 3px 0 var(--acid); }
.split-card { display: grid; grid-template-columns: 1fr 300px; margin-top: 2rem; border: 1px solid var(--desk-line); }
.split-card article { min-width: 0; padding: 1.5rem; }
.split-card article + article { border-left: 1px solid var(--desk-line); background: var(--desk-panel); }
.split-card h3 { margin: .8rem 0; font: 800 2.5rem var(--mono); }
.split-card p:not(.card-index) { color: var(--desk-muted); line-height: 1.5; }
.model-output { display: grid; align-content: center; gap: .8rem; }
.model-output strong { font: 800 1.6rem var(--mono); }
.model-output small { color: var(--desk-muted); font: 10px/1.5 var(--mono); }

.regime-panel { display: grid; grid-template-columns: minmax(0, 1fr) 310px; border: 1px solid var(--desk-line); }
.regime-panel > div, .regime-panel > aside { padding: 1.5rem; }
.regime-panel > aside { display: grid; align-content: center; gap: 1rem; border-left: 1px solid var(--desk-line); background: var(--acid); color: var(--desk-bg); }
.regime-panel aside span, .regime-panel aside small { font: 800 9px/1.5 var(--mono); text-transform: uppercase; }
.regime-panel aside strong { font: 900 1.8rem var(--mono); }
.regime-panel aside p { margin: 0; font-size: 1rem; line-height: 1.4; }
.regime-chart { display: grid; gap: .8rem; margin-top: 1.5rem; }
.regime { display: grid; grid-template-columns: 130px 1fr 130px; align-items: center; gap: 1rem; padding: .8rem; border: 1px solid transparent; }
.regime.selected { border-color: var(--acid); background: color-mix(in srgb, var(--acid) 5%, transparent); }
.regime span, .regime strong { font: 800 10px var(--mono); }
.regime small { display: block; margin-top: .25rem; color: var(--desk-muted); font: 8px var(--mono); }
.regime strong { text-align: right; }
.bar { height: 8px; background: var(--desk-line); }
.bar i { display: block; height: 100%; background: var(--acid); }

.calc-grid { display: grid; grid-template-columns: minmax(260px, .7fr) 1.3fr; border: 1px solid var(--desk-line); }
.calc-controls { display: grid; align-content: center; gap: 1rem; padding: 1.5rem; background: var(--desk-panel); }
.calc-controls label { display: grid; grid-template-columns: 1fr auto; gap: .8rem; padding-bottom: 1rem; border-bottom: 1px solid var(--desk-line); }
.calc-controls input { grid-column: 1/-1; width: 100%; }
.comparison { display: grid; grid-template-columns: repeat(2, 1fr); }
.comparison article { display: grid; align-content: center; min-height: 160px; padding: 1.5rem; border-left: 1px solid var(--desk-line); border-bottom: 1px solid var(--desk-line); }
.comparison article.winner { background: color-mix(in srgb, var(--acid) 6%, transparent); box-shadow: inset 0 3px var(--acid); }
.comparison article strong, .callout strong { margin: .8rem 0 .25rem; font: 800 1.6rem var(--mono); }
.comparison article small { color: var(--desk-muted); font: 9px var(--mono); }
.callout { grid-column: 1/-1; padding: 1.5rem; border-left: 1px solid var(--desk-line); background: var(--acid); color: var(--desk-bg); }
.callout span { color: var(--desk-bg); }
.callout strong { display: block; }
.callout p { margin: .4rem 0 0; }
.callout.negative-box { background: var(--red); }
.callout.positive-box { background: var(--acid); }
.observed-line { display: grid; grid-template-columns: auto 1fr; gap: .7rem 1rem; align-items: center; margin-top: 1rem; padding: 1rem; border: 1px solid var(--desk-line); font-family: var(--mono); }
.observed-line strong { font-size: 11px; }
.observed-line small { grid-column: 2; color: var(--desk-muted); font-size: 9px; line-height: 1.5; }

.box-model { display: grid; grid-template-columns: 1fr 1fr 1.2fr; gap: 1px; margin-bottom: 2rem; border: 1px solid var(--desk-line); background: var(--desk-line); }
.box-model .model-output { padding: 1.2rem; background: var(--desk-panel); }
.box-model .model-output strong { font-size: 1.35rem; }

.source-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin-bottom: 3rem; border: 1px solid var(--desk-line); background: var(--desk-line); }
.source-grid article { display: grid; grid-template-columns: auto 1fr auto; gap: .8rem; align-items: center; min-width: 0; padding: 1rem; background: var(--desk-panel); }
.source-grid strong { display: block; font: 800 10px var(--mono); text-transform: uppercase; }
.source-grid small { display: block; margin-top: .3rem; overflow: hidden; color: var(--desk-muted); font: 8px var(--mono); text-overflow: ellipsis; white-space: nowrap; }
.source-grid a { color: var(--acid); text-decoration: none; }
.sources { display: grid; grid-template-columns: 1fr 1fr; }
.sources a { display: flex; justify-content: space-between; margin-right: 2rem; padding: 1.2rem 0; border-top: 1px solid var(--desk-line); }
details { margin-top: 3rem; padding: 1rem; border: 1px solid var(--desk-line); font: 10px/1.7 var(--mono); }
summary { color: var(--acid); cursor: pointer; text-transform: uppercase; }
.error { padding: 1rem; border: 1px solid var(--red); color: var(--red); font: 11px/1.5 var(--mono); }

footer { display: flex; justify-content: space-between; gap: 2rem; padding: 2rem clamp(1rem, 5vw, 5rem); color: var(--desk-bg); background: var(--acid); font: 900 9px var(--mono); letter-spacing: .09em; text-transform: uppercase; }
:focus-visible { outline: 3px solid var(--acid); outline-offset: 3px; }

@media (max-width: 980px) {
  .mast { grid-template-columns: 1fr; min-height: 560px; }
  .tape { grid-template-columns: 1fr 1fr; }
  .tape > div { border-right: 1px solid var(--desk-line); }
  .section-head { align-items: flex-start; flex-direction: column; }
  .strategy-grid { grid-template-columns: repeat(2, 1fr); }
  .metric-strip { grid-template-columns: repeat(2, 1fr); }
  .source-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 760px) {
  .method-strip { align-items: flex-start; flex-direction: column; gap: .5rem; }
  .decision { grid-template-columns: 40px minmax(0, 1fr); }
  .decision-metric { grid-column: 2; justify-items: start; text-align: left; }
  .queue-key { flex-wrap: wrap; }
  .split-card, .regime-panel, .calc-grid { grid-template-columns: 1fr; }
  .split-card article + article, .regime-panel > aside { border-top: 1px solid var(--desk-line); border-left: 0; }
  .formula { grid-template-columns: 1fr; }
  .box-model { grid-template-columns: 1fr 1fr; }
  .box-model .model-output { grid-column: 1/-1; }
  .sources { grid-template-columns: 1fr; }
  .sources a { margin-right: 0; }
}

@media (max-width: 520px) {
  .ticker span:nth-child(n+3) { display: none; }
  .mast { padding-top: 4rem; }
  h1 { font-size: 22vw; }
  .tape { grid-template-columns: 1fr; }
  .strategy-grid, .metric-strip, .source-grid, .comparison, .box-model { grid-template-columns: 1fr; }
  .hero-control { grid-column: auto; }
  .comparison article { border-left: 0; }
  .callout, .box-model .model-output { grid-column: 1; }
  .regime { grid-template-columns: 90px 1fr; }
  .regime strong { grid-column: 2; text-align: left; }
  .observed-line { grid-template-columns: 1fr; }
  .observed-line small { grid-column: 1; }
  footer { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}