:root {
  color-scheme: light;
  --ink: #111512;
  --paper: #f4f6ef;
  --paper-2: #e7ebe5;
  --muted: #5d6861;
  --line: #111512;
  --lime: #d9ee45;
  --green: #0a706c;
  --cyan: #55d8cf;
  --coral: #ff705c;
  --yellow: #f6c84c;
  --blue: #82c7ff;
  --white: #ffffff;
  --mono: Consolas, "Courier New", monospace;
  --sans: Inter, "Segoe UI", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--ink); }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: var(--sans); letter-spacing: 0; }
a { color: inherit; }
button, input, select { font: inherit; letter-spacing: 0; }
button, select { cursor: pointer; }
button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible { outline: 3px solid var(--blue); outline-offset: 3px; }

.skip-link { position: fixed; z-index: 100; top: 8px; left: 8px; padding: 12px 16px; color: var(--ink); background: var(--lime); border: 1px solid var(--ink); font: 800 10px/1 var(--mono); transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }

.site-header { position: relative; z-index: 20; height: 58px; display: flex; align-items: stretch; justify-content: space-between; color: var(--paper); background: var(--ink); border-bottom: 1px solid #465049; }
.brand { min-width: 250px; display: flex; align-items: center; gap: 14px; padding: 0 24px; text-decoration: none; border-right: 1px solid #465049; }
.brand span { display: grid; place-items: center; width: 34px; height: 34px; color: var(--ink); background: var(--lime); font: 900 11px/1 var(--mono); }
.brand b { font: 800 10px/1 var(--mono); }
.site-header nav { display: flex; align-items: stretch; }
.site-header nav a { min-width: 112px; display: grid; place-items: center; padding: 0 16px; color: #c7d0c9; border-left: 1px solid #465049; text-decoration: none; font: 800 9px/1 var(--mono); }
.site-header nav a:hover { color: var(--ink); background: var(--lime); }

.delta-hero { position: relative; min-height: 620px; height: calc(100svh - 104px); max-height: 780px; overflow: hidden; color: var(--paper); background: #1b201c; border-bottom: 1px solid var(--line); }
.delta-hero__media, .delta-hero__shade { position: absolute; inset: 0; }
.delta-hero__media img { width: 100%; height: 100%; object-fit: cover; object-position: center 44%; filter: saturate(.85) contrast(1.05); }
.delta-hero__shade { background: rgba(10, 14, 11, .72); }
.delta-hero__inner { position: relative; z-index: 2; width: min(100%, 1480px); height: 100%; margin: 0 auto; padding: 54px 28px 44px; display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(420px, .75fr); align-items: end; gap: 70px; }
.delta-hero__copy { max-width: 810px; }
.eyebrow { margin: 0; color: var(--green); font: 900 9px/1.5 var(--mono); }
.delta-hero .eyebrow { color: var(--cyan); }
.delta-hero h1 { max-width: 800px; margin: 16px 0 20px; font: 800 58px/.98 var(--mono); text-wrap: balance; overflow-wrap: anywhere; }
.delta-hero__copy > p:not(.eyebrow) { max-width: 680px; margin: 0; color: #d7dfd8; font-size: 15px; line-height: 1.7; }
.delta-hero__actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.delta-hero__actions a { min-height: 48px; display: inline-grid; place-items: center; padding: 12px 18px; color: var(--ink); background: var(--lime); border: 1px solid var(--lime); text-decoration: none; font: 900 9px/1.2 var(--mono); }
.delta-hero__actions a + a { color: var(--paper); background: transparent; border-color: #79847c; }
.delta-hero__actions a:hover { color: var(--ink); background: var(--cyan); border-color: var(--cyan); }
.delta-hero__copy > small { display: block; max-width: 680px; margin-top: 16px; color: #aeb8b0; font: 700 9px/1.55 var(--mono); }

.release-map { background: rgba(15, 19, 16, .88); border: 1px solid #7c887f; }
.release-map > header { min-height: 42px; display: flex; align-items: center; justify-content: space-between; padding: 10px 14px; border-bottom: 1px solid #566159; font: 800 8px/1 var(--mono); }
.release-map > header span { color: var(--cyan); }
.release-map > header b { color: #aeb8b0; }
.release-map__versions { min-height: 170px; display: grid; grid-template-columns: 1fr 42px 1fr; align-items: center; padding: 22px 16px; }
.release-map__versions > div { min-width: 0; }
.release-map__versions span, .release-map__versions small { display: block; color: #9ea9a1; font: 800 8px/1.4 var(--mono); }
.release-map__versions strong { display: block; margin: 10px 0 8px; color: var(--paper); font: 900 20px/1 var(--mono); overflow-wrap: anywhere; }
.release-map__versions i { position: relative; height: 1px; background: var(--lime); }
.release-map__versions i::after { content: ""; position: absolute; top: -4px; right: 0; width: 8px; height: 8px; border-top: 1px solid var(--lime); border-right: 1px solid var(--lime); transform: rotate(45deg); }
.release-map dl { margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid #566159; }
.release-map dl div { min-height: 76px; display: grid; place-items: center; align-content: center; border-right: 1px solid #566159; }
.release-map dl div:last-child { border-right: 0; }
.release-map dt { color: #9ea9a1; font: 800 7px/1 var(--mono); }
.release-map dd { margin: 7px 0 0; color: var(--paper); font: 900 22px/1 var(--mono); }
.release-map dl div:nth-child(1) dd { color: var(--coral); }
.release-map dl div:nth-child(2) dd { color: var(--blue); }
.release-map dl div:nth-child(3) dd { color: var(--yellow); }
.release-map dl div:nth-child(4) dd { color: var(--cyan); }
.release-map > footer { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid #566159; }
.release-map > footer span { min-width: 0; padding: 10px 7px; color: #9ea9a1; border-right: 1px solid #566159; text-align: center; overflow-wrap: anywhere; font: 700 7px/1.3 var(--mono); }
.release-map > footer span:last-child { border-right: 0; }

.evidence-rail { min-height: 92px; display: grid; grid-template-columns: repeat(4, 1fr); color: var(--ink); background: var(--lime); border-bottom: 1px solid var(--line); }
.evidence-rail div { min-width: 0; display: grid; place-items: center; align-content: center; gap: 8px; padding: 14px; border-right: 1px solid var(--line); text-align: center; }
.evidence-rail div:last-child { border-right: 0; }
.evidence-rail b { font: 900 15px/1 var(--mono); }
.evidence-rail span { font: 800 7px/1.3 var(--mono); overflow-wrap: anywhere; }

.ledger-band { background: var(--paper); border-bottom: 1px solid var(--line); }
.ledger-shell, .brief-shell, .method-shell { width: min(100%, 1480px); margin: 0 auto; padding: 70px 28px; }
.section-heading { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(320px, .5fr); gap: 64px; align-items: end; margin-bottom: 28px; }
.section-heading h2, .brief-copy h2 { max-width: 900px; margin: 12px 0 0; font: 800 42px/1.03 var(--mono); text-wrap: balance; overflow-wrap: anywhere; }
.section-heading > p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.7; }

.filter-workbench { display: grid; grid-template-columns: minmax(320px, 1.5fr) minmax(180px, .55fr) minmax(160px, .45fr) 104px; align-items: end; border: 1px solid var(--line); background: var(--white); }
.filter-workbench label { min-width: 0; display: grid; gap: 7px; padding: 12px 14px; border-right: 1px solid var(--line); }
.filter-workbench label span { color: var(--green); font: 900 8px/1 var(--mono); }
.filter-workbench input, .filter-workbench select { width: 100%; min-width: 0; height: 42px; padding: 0 12px; color: var(--ink); background: var(--paper); border: 1px solid #a7afa8; border-radius: 0; font: 700 11px/1 var(--mono); }
.filter-workbench input::placeholder { color: #7d8880; opacity: 1; }
.reset-button { height: 100%; min-height: 75px; color: var(--paper); background: var(--ink); border: 0; font: 900 8px/1 var(--mono); }
.reset-button:hover { color: var(--ink); background: var(--coral); }

.category-tabs { margin-top: 14px; display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); border: 1px solid var(--line); background: var(--white); }
.category-tabs button { min-width: 0; min-height: 54px; padding: 9px 8px; color: var(--ink); background: transparent; border: 0; border-right: 1px solid var(--line); font: 800 8px/1.3 var(--mono); overflow-wrap: anywhere; }
.category-tabs button:last-child { border-right: 0; }
.category-tabs button span { display: block; margin-top: 5px; color: var(--muted); font-size: 7px; }
.category-tabs button[aria-selected="true"] { background: var(--lime); }
.category-tabs button:hover { background: var(--paper-2); }

.ledger-status { min-height: 72px; margin-top: 14px; display: grid; grid-template-columns: minmax(0, 1fr) repeat(3, 128px); color: var(--paper); background: var(--ink); border: 1px solid var(--line); }
.ledger-status > * { margin: 0; min-width: 0; display: flex; align-items: center; justify-content: center; gap: 7px; border-right: 1px solid #465049; }
.ledger-status > *:last-child { border-right: 0; }
.ledger-status p { justify-content: flex-start; padding: 0 18px; }
.ledger-status strong, .ledger-status div span { color: var(--lime); font: 900 22px/1 var(--mono); }
.ledger-status p span, .ledger-status small { color: #aeb8b0; font: 800 7px/1.3 var(--mono); }

.change-ledger { margin-top: 14px; border-top: 1px solid var(--line); border-right: 1px solid var(--line); border-left: 1px solid var(--line); }
.delta-card { background: var(--white); border-bottom: 1px solid var(--line); }
.delta-card__summary { min-height: 104px; display: grid; grid-template-columns: 64px 116px minmax(260px, 1fr) 140px 42px; align-items: stretch; }
.delta-card__number { display: grid; place-items: center; background: var(--paper-2); border-right: 1px solid var(--line); font: 900 11px/1 var(--mono); }
.delta-card[data-impact="critical"] .delta-card__number { background: var(--coral); }
.delta-card[data-impact="high"] .delta-card__number { background: var(--yellow); }
.delta-card[data-impact="medium"] .delta-card__number { background: var(--blue); }
.delta-card[data-impact="info"] .delta-card__number { background: var(--cyan); }
.delta-card__meta { min-width: 0; display: grid; align-content: center; gap: 7px; padding: 14px; border-right: 1px solid var(--line); }
.delta-card__meta b, .delta-card__meta span { overflow-wrap: anywhere; font: 900 7px/1.3 var(--mono); }
.delta-card__meta b { color: var(--green); }
.delta-card__meta span { color: var(--muted); }
.delta-card__title { min-width: 0; display: grid; align-content: center; gap: 8px; padding: 15px 20px; }
.delta-card__title h3 { margin: 0; font: 800 18px/1.25 var(--mono); overflow-wrap: anywhere; }
.delta-card__title p { margin: 0; color: var(--muted); font-size: 11px; line-height: 1.5; }
.delta-card__roles { display: flex; flex-wrap: wrap; align-content: center; gap: 5px; padding: 12px; border-left: 1px solid var(--line); }
.delta-card__roles span { padding: 5px 6px; color: var(--ink); background: var(--paper-2); border: 1px solid #aab2ab; font: 800 7px/1 var(--mono); }
.delta-card__toggle { color: var(--paper); background: var(--ink); border: 0; border-left: 1px solid var(--line); font: 900 20px/1 var(--mono); }
.delta-card__toggle:hover, .delta-card[data-open="true"] .delta-card__toggle { color: var(--ink); background: var(--lime); }
.delta-card__details { display: none; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line); }
.delta-card[data-open="true"] .delta-card__details { display: grid; }
.delta-card__before, .delta-card__after { min-width: 0; padding: 20px; }
.delta-card__before { background: #f0e9e5; border-right: 1px solid var(--line); }
.delta-card__after { background: #e8f1e7; }
.delta-card__details h4 { margin: 0 0 10px; color: var(--green); font: 900 8px/1 var(--mono); }
.delta-card__details p { margin: 0; font-size: 12px; line-height: 1.65; }
.delta-card__action { grid-column: 1/-1; display: grid; grid-template-columns: 108px minmax(0, 1fr) 170px; align-items: center; min-height: 72px; border-top: 1px solid var(--line); }
.delta-card__action b { padding: 18px; color: var(--green); font: 900 8px/1 var(--mono); }
.delta-card__action p { padding: 14px 18px; border-right: 1px solid var(--line); border-left: 1px solid var(--line); }
.delta-card__action a { height: 100%; display: grid; place-items: center; padding: 12px; color: var(--paper); background: var(--ink); text-align: center; text-decoration: none; font: 900 8px/1.3 var(--mono); }
.delta-card__action a:hover { color: var(--ink); background: var(--cyan); }
.empty-state { padding: 56px 20px; text-align: center; border: 1px solid var(--line); background: var(--white); }
.empty-state strong { font: 900 15px/1.3 var(--mono); }
.empty-state p { margin: 12px 0 0; color: var(--muted); font-size: 12px; }

.brief-band { color: var(--paper); background: var(--ink); border-bottom: 1px solid #465049; }
.brief-shell { display: grid; grid-template-columns: minmax(0, 1fr) minmax(380px, .72fr); gap: 72px; align-items: center; }
.brief-copy .eyebrow { color: var(--cyan); }
.brief-copy h2 { max-width: 720px; }
.brief-copy > p:not(.eyebrow) { max-width: 700px; margin: 18px 0 0; color: #bdc7bf; font-size: 13px; line-height: 1.75; }
.brief-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.brief-actions button { min-height: 46px; padding: 10px 16px; color: var(--ink); background: var(--lime); border: 1px solid var(--lime); font: 900 8px/1 var(--mono); }
.brief-actions button + button { color: var(--paper); background: transparent; border-color: #657067; }
.brief-actions button:hover { color: var(--ink); background: var(--cyan); border-color: var(--cyan); }
.brief-copy output { display: block; min-height: 20px; margin-top: 12px; color: var(--cyan); font: 800 8px/1.4 var(--mono); }
.brief-contract { border: 1px solid #657067; background: #171c18; }
.brief-contract header, .brief-contract footer { min-height: 42px; display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 10px 14px; font: 800 8px/1 var(--mono); }
.brief-contract header { border-bottom: 1px solid #465049; }
.brief-contract header span { color: var(--cyan); }
.brief-contract header b { color: var(--lime); }
.brief-contract pre { margin: 0; padding: 28px 20px; overflow: auto; color: #cbd5cd; font: 700 11px/1.75 var(--mono); }
.brief-contract footer { justify-content: flex-start; border-top: 1px solid #465049; color: #8f9a91; }

.method-band { background: var(--paper-2); }
.method-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.method-grid article { min-height: 230px; padding: 24px; background: var(--paper); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.method-grid article > span { display: grid; place-items: center; width: 34px; height: 34px; background: var(--lime); border: 1px solid var(--line); font: 900 9px/1 var(--mono); }
.method-grid h3 { margin: 42px 0 10px; font: 800 17px/1.2 var(--mono); }
.method-grid p { margin: 0; color: var(--muted); font-size: 11px; line-height: 1.7; }
.source-ledger { margin-top: 20px; display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.source-ledger a { min-height: 92px; display: grid; align-content: center; gap: 9px; padding: 15px; background: var(--white); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); text-decoration: none; }
.source-ledger a:hover { background: var(--lime); }
.source-ledger span { color: var(--green); font: 900 7px/1 var(--mono); }
.source-ledger b { font: 800 9px/1.25 var(--mono); overflow-wrap: anywhere; }

.site-footer { min-height: 104px; display: flex; align-items: center; justify-content: space-between; gap: 30px; padding: 24px 28px; color: var(--paper); background: var(--ink); border-top: 1px solid #465049; }
.site-footer > div { display: grid; gap: 8px; }
.site-footer strong { color: var(--lime); font: 900 10px/1 var(--mono); }
.site-footer span { color: #8f9a91; font: 800 7px/1 var(--mono); }
.site-footer nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px; }
.site-footer a { padding: 9px 10px; color: #c8d1ca; border: 1px solid #465049; text-decoration: none; font: 800 7px/1 var(--mono); }
.site-footer a:hover { color: var(--ink); background: var(--lime); }
.noscript { padding: 12px; color: var(--ink); background: var(--coral); text-align: center; font: 800 9px/1.4 var(--mono); }

@media (max-width: 1080px) {
  .delta-hero__inner { grid-template-columns: minmax(0, 1fr) minmax(360px, .75fr); gap: 34px; }
  .delta-hero h1 { font-size: 48px; }
  .filter-workbench { grid-template-columns: 1fr 1fr 1fr; }
  .filter-workbench .search-field { grid-column: 1/-1; border-right: 0; border-bottom: 1px solid var(--line); }
  .reset-button { min-height: 75px; }
  .category-tabs { grid-template-columns: repeat(4, 1fr); }
  .category-tabs button { border-bottom: 1px solid var(--line); }
  .category-tabs button:nth-child(4n) { border-right: 0; }
  .category-tabs button:nth-last-child(-n+3) { border-bottom: 0; }
  .delta-card__summary { grid-template-columns: 56px 104px minmax(0, 1fr) 42px; }
  .delta-card__roles { grid-column: 3; border-top: 1px solid #c2c9c3; border-left: 0; padding: 8px 20px; }
  .delta-card__title { grid-row: span 2; }
  .delta-card__toggle { grid-column: 4; grid-row: 1 / span 2; }
  .brief-shell { gap: 36px; }
}

@media (max-width: 820px) {
  .site-header nav a { min-width: 76px; padding: 0 9px; }
  .brand { min-width: 190px; padding: 0 14px; }
  .delta-hero { min-height: 700px; height: calc(100svh - 72px); max-height: 760px; }
  .delta-hero__inner { grid-template-columns: 1fr; align-content: end; gap: 28px; padding: 38px 20px 28px; }
  .delta-hero h1 { max-width: 720px; font-size: 42px; }
  .release-map { max-width: 620px; }
  .section-heading, .brief-shell { grid-template-columns: 1fr; gap: 22px; }
  .ledger-status { grid-template-columns: 1fr repeat(3, 96px); }
  .method-grid { grid-template-columns: 1fr; }
  .method-grid article { min-height: 170px; }
  .method-grid h3 { margin-top: 28px; }
  .source-ledger { grid-template-columns: 1fr 1fr; }
  .source-ledger a:nth-child(2n) { border-right: 0; }
}

@media (max-width: 620px) {
  .site-header { height: 52px; }
  .brand { min-width: 0; flex: 1; }
  .brand span { width: 30px; height: 30px; }
  .site-header nav a { min-width: 46px; padding: 0 8px; font-size: 0; }
  .site-header nav a::after { font: 900 8px/1 var(--mono); }
  .site-header nav a:nth-child(1)::after { content: "01"; }
  .site-header nav a:nth-child(2)::after { content: "02"; }
  .site-header nav a:nth-child(3)::after { content: "03"; }
  .site-header nav a:nth-child(4) { display: none; }
  .delta-hero { min-height: 690px; height: calc(100svh - 34px); max-height: 760px; }
  .delta-hero__inner { padding: 34px 14px 18px; gap: 18px; }
  .delta-hero h1 { margin: 12px 0 14px; font-size: 34px; line-height: 1.02; }
  .delta-hero__copy > p:not(.eyebrow) { font-size: 12px; line-height: 1.55; }
  .delta-hero__actions { margin-top: 18px; }
  .delta-hero__actions a { min-height: 42px; padding: 9px 11px; font-size: 7px; }
  .delta-hero__copy > small { margin-top: 10px; font-size: 7px; }
  .release-map__versions { min-height: 116px; grid-template-columns: 1fr 28px 1fr; padding: 12px; }
  .release-map__versions strong { font-size: 14px; }
  .release-map dl div { min-height: 58px; }
  .release-map dd { font-size: 17px; }
  .release-map > footer { display: none; }
  .evidence-rail { grid-template-columns: 1fr 1fr; min-height: 116px; }
  .evidence-rail div:nth-child(2) { border-right: 0; }
  .evidence-rail div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .ledger-shell, .brief-shell, .method-shell { padding: 50px 14px; }
  .section-heading h2, .brief-copy h2 { font-size: 31px; }
  .section-heading > p { font-size: 11px; }
  .filter-workbench { grid-template-columns: 1fr 1fr; }
  .filter-workbench .search-field { grid-column: 1/-1; }
  .filter-workbench label:nth-child(3) { border-right: 0; }
  .reset-button { grid-column: 1/-1; min-height: 42px; border-top: 1px solid var(--line); }
  .category-tabs { grid-template-columns: 1fr 1fr; }
  .category-tabs button, .category-tabs button:nth-child(4n) { border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
  .category-tabs button:nth-child(2n) { border-right: 0; }
  .category-tabs button:last-child { grid-column: 1/-1; border-right: 0; border-bottom: 0; }
  .ledger-status { grid-template-columns: repeat(3, 1fr); }
  .ledger-status p { grid-column: 1/-1; min-height: 54px; border-right: 0; border-bottom: 1px solid #465049; }
  .ledger-status div { min-height: 58px; }
  .delta-card__summary { grid-template-columns: 44px minmax(0, 1fr) 42px; }
  .delta-card__number { grid-row: 1 / span 2; }
  .delta-card__meta { grid-column: 2; min-height: 48px; grid-auto-flow: column; justify-content: start; align-content: center; border-right: 0; border-bottom: 1px solid #c2c9c3; }
  .delta-card__title { grid-column: 2; grid-row: 2; padding: 13px 14px; }
  .delta-card__title h3 { font-size: 15px; }
  .delta-card__roles { display: none; }
  .delta-card__toggle { grid-column: 3; grid-row: 1 / span 2; }
  .delta-card__details { grid-template-columns: 1fr; }
  .delta-card__before { border-right: 0; border-bottom: 1px solid var(--line); }
  .delta-card__action { grid-template-columns: 1fr; }
  .delta-card__action b { padding-bottom: 4px; }
  .delta-card__action p { padding-top: 8px; border: 0; }
  .delta-card__action a { min-height: 44px; border-top: 1px solid var(--line); }
  .brief-actions { display: grid; grid-template-columns: 1fr 1fr; }
  .brief-actions button { min-width: 0; padding: 8px; }
  .brief-contract pre { font-size: 9px; }
  .source-ledger { grid-template-columns: 1fr; }
  .source-ledger a { border-right: 0; }
  .site-footer { align-items: flex-start; flex-direction: column; }
  .site-footer nav { justify-content: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}