:root {
    --ink: #17211f;
    --ink-soft: #52605c;
    --forest: #173c35;
    --forest-deep: #102d28;
    --green: #2f6b5e;
    --sage: #8eaa9f;
    --mint: #dbeae4;
    --paper: #f4f1e8;
    --paper-deep: #e8e2d4;
    --white: #fffefa;
    --line: #d2d0c6;
    --line-dark: rgba(255,255,255,.22);
    --clay: #a85840;
    --ochre: #b78943;
    --blue: #274f61;
    --shadow: 0 18px 48px rgba(18, 48, 42, .10);
    --shell: 1180px;
    --narrow: 900px;
    --radius: 12px;
    --sans: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --serif: Georgia, "Times New Roman", serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--white); font: 17px/1.62 var(--sans); -webkit-font-smoothing: antialiased; }
body.menu-open { overflow: hidden; }
img, svg { display: block; max-width: 100%; }
a { color: var(--green); text-underline-offset: .2em; }
a:hover { color: var(--clay); }
button, input, select { font: inherit; }
button, select { cursor: pointer; }
input, select { color: var(--ink); }
::selection { background: #bcd8ce; }
[hidden] { display: none !important; }

h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { line-height: 1.08; letter-spacing: -.025em; }
h1 { font: 400 clamp(2.8rem, 6.5vw, 5.5rem)/1.02 var(--serif); }
h2 { font: 400 clamp(1.9rem, 3.6vw, 3.2rem)/1.08 var(--serif); }
h3 { font-size: 1.18rem; }

.site-shell { width: min(calc(100% - 40px), var(--shell)); margin-inline: auto; }
.narrow-shell { width: min(calc(100% - 40px), var(--narrow)); }
.section { padding: 88px 0; }
.section-tight { padding: 58px 0 88px; }
.section-paper { background: var(--paper); }
.section-dark { background: var(--forest-deep); color: var(--white); }
.section-overlap { position: relative; z-index: 2; margin-top: -54px; padding-top: 0; }
.eyebrow { margin-bottom: 16px; color: var(--green); font-size: .74rem; font-weight: 800; letter-spacing: .15em; text-transform: uppercase; }
.lede { max-width: 760px; font-size: clamp(1.1rem, 2vw, 1.34rem); line-height: 1.55; }
.small-print { color: var(--ink-soft); font-size: .86rem; }

.skip-link { position: fixed; left: 14px; top: -60px; z-index: 999; padding: 10px 14px; background: var(--white); border: 2px solid var(--ink); color: var(--ink); }
.skip-link:focus { top: 14px; }
.site-header { position: sticky; top: 0; z-index: 100; background: rgba(255,254,250,.96); border-bottom: 1px solid rgba(210,208,198,.8); backdrop-filter: blur(12px); }
.header-inner { min-height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 11px; color: var(--forest); text-decoration: none; }
.brand:hover { color: var(--forest); }
.brand-mark { width: 38px; height: 38px; fill: currentColor; }
.brand span { display: grid; line-height: 1.08; }
.brand strong { font-size: 1.08rem; letter-spacing: -.02em; }
.brand small { margin-top: 4px; color: var(--ink-soft); font-size: .67rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.site-nav { display: flex; align-items: center; gap: 4px; }
.site-nav a { padding: 10px 13px; color: var(--ink); border-bottom: 2px solid transparent; font-size: .92rem; font-weight: 680; text-decoration: none; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--forest); border-color: var(--forest); }
.menu-toggle { display: none; align-items: center; gap: 8px; border: 0; background: transparent; color: var(--ink); font-weight: 700; }
.menu-toggle svg { width: 24px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; }

.hero { overflow: hidden; background: var(--paper); }
.home-hero { min-height: 640px; display: grid; align-items: center; padding: 82px 0 108px; }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 54px; align-items: center; }
.hero-copy h1 { margin-bottom: 26px; }
.hero-copy .lede { max-width: 650px; color: var(--ink-soft); }
.button-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 48px; padding: 12px 19px; border: 1px solid var(--forest); border-radius: 4px; font-size: .93rem; font-weight: 760; line-height: 1.2; text-align: center; text-decoration: none; transition: transform .15s ease, background-color .15s ease, color .15s ease; }
.button:hover { transform: translateY(-1px); }
.button-primary { background: var(--forest); color: var(--white); }
.button-primary:hover { background: var(--green); color: var(--white); }
.button-secondary { background: transparent; color: var(--forest); }
.button-secondary:hover { background: var(--mint); color: var(--forest); }
.button-light { border-color: var(--white); background: var(--white); color: var(--forest); }
.button-light:hover { background: var(--mint); color: var(--forest); }
.button-quiet { min-height: 40px; padding: 8px 13px; border-color: var(--line); background: transparent; color: var(--ink); }
.button-block { width: 100%; }
.button svg, .resource-link svg, .answer-file-link svg, .paper-resource svg, .support-link svg, .text-link svg { width: 16px; height: 16px; flex: 0 0 auto; fill: currentColor; }
.hero-figure svg { width: 100%; }
.figure-lines path { fill: none; stroke: var(--sage); stroke-width: 2; stroke-dasharray: 5 7; }
.figure-node circle { fill: var(--white); stroke: var(--forest); stroke-width: 2; }
.figure-node text { fill: var(--forest); font: 700 15px var(--sans); letter-spacing: .08em; text-anchor: middle; }
.main-node circle { fill: var(--forest); }
.main-node text { fill: var(--white); }

.resource-launch-grid { display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--line); background: var(--white); box-shadow: var(--shadow); }
.launch-card { min-height: 310px; display: grid; grid-template-rows: auto 1fr auto; gap: 18px; padding: 34px; color: var(--ink); border-right: 1px solid var(--line); text-decoration: none; }
.launch-card:last-child { border-right: 0; }
.launch-card:hover { background: var(--mint); color: var(--ink); }
.launch-card h2 { margin-bottom: 12px; font-size: 2.2rem; }
.launch-card p { color: var(--ink-soft); }
.card-number { font-size: .76rem; font-weight: 800; letter-spacing: .14em; }
.card-kicker { margin-bottom: 9px; font-size: .73rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.card-arrow { justify-self: end; font-size: 1.7rem; }
.split-heading, .dark-callout { display: grid; grid-template-columns: .95fr 1.05fr; gap: 78px; align-items: start; }
.split-heading { margin-bottom: 42px; }
.split-heading > p { max-width: 560px; color: var(--ink-soft); }
.level-choice-grid, .qualification-choice-grid, .tier-choice-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.level-choice, .qualification-choice, .tier-choice { min-height: 260px; display: flex; flex-direction: column; padding: 34px; border: 1px solid var(--line); background: var(--white); color: var(--ink); text-decoration: none; }
.level-choice:hover, .qualification-choice:hover, .tier-choice:hover { background: var(--mint); color: var(--ink); border-color: var(--sage); }
.level-choice > span, .qualification-choice > span, .tier-choice > span { color: var(--green); font-size: .74rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.level-choice h2, .qualification-choice h2, .tier-choice h2 { margin: 26px 0 14px; font-size: 2.15rem; }
.level-choice p, .qualification-choice p, .tier-choice p { color: var(--ink-soft); }
.level-choice strong, .tier-choice strong { margin-top: auto; color: var(--forest); }
.qualification-choice > div { display: flex; justify-content: space-between; align-items: end; margin-top: auto; padding-top: 24px; border-top: 1px solid var(--line); }
.qualification-choice > div strong { font: 400 2rem var(--serif); color: var(--forest); }
.qualification-choice > div span { color: var(--green); font-weight: 750; }
.dark-callout h2 { margin: 0; color: var(--white); }
.dark-callout p { color: #d7e4df; }
.dark-callout .button { margin-top: 12px; }

.page-hero, .book-detail-hero { min-height: 390px; display: grid; align-items: center; padding: 70px 0 112px; color: var(--white); background: var(--forest); }
.page-hero h1, .book-detail-hero h1 { margin-bottom: 22px; font-size: clamp(2.7rem, 5.8vw, 5rem); }
.page-hero .eyebrow, .book-detail-hero .eyebrow { color: #b8d3ca; }
.page-hero-books { background: #173c35; }
.page-hero-papers { background: #203e47; }
.page-hero-boundaries { background: #443d2b; }
.page-hero-about { background: #293a32; }
.breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 32px; color: var(--ink-soft); font-size: .82rem; }
.breadcrumb a { color: inherit; }
.breadcrumb-light { color: #cbdad6; }
.book-meta { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 36px; border: 1px solid var(--line-dark); }
.book-meta div { padding: 18px 20px; border-right: 1px solid var(--line-dark); }
.book-meta div:last-child { border-right: 0; }
.book-meta span { display: block; color: #b8d3ca; font-size: .68rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.book-meta strong { display: block; margin-top: 7px; color: var(--white); font-size: .9rem; }

.filter-panel, .content-panel, .source-card, .tracker-summary, .qualification-summary, .boundary-controls, .boundary-result { border: 1px solid var(--line); background: var(--white); box-shadow: var(--shadow); }
.filter-panel { padding: 28px; margin-bottom: 28px; }
.filter-heading { display: flex; justify-content: space-between; gap: 40px; align-items: end; margin-bottom: 24px; }
.filter-heading h2 { margin: 0; font-size: 2rem; }
.filter-heading > p { max-width: 480px; margin: 0; color: var(--ink-soft); }
.filter-grid { display: grid; grid-template-columns: .7fr .8fr 1.5fr; gap: 16px; }
label > span { display: block; margin-bottom: 7px; color: var(--ink-soft); font-size: .75rem; font-weight: 800; letter-spacing: .06em; text-transform: uppercase; }
input, select { width: 100%; min-height: 47px; padding: 10px 12px; border: 1px solid var(--line); background: var(--white); border-radius: 3px; }
input:focus, select:focus { outline: 3px solid rgba(47,107,94,.18); border-color: var(--green); }
.book-results { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.book-card { min-height: 270px; display: flex; flex-direction: column; padding: 26px; border: 1px solid var(--line); background: var(--white); }
.book-card-top { display: flex; justify-content: space-between; gap: 15px; align-items: center; color: var(--ink-soft); font-size: .75rem; }
.book-board { padding: 4px 8px; border: 1px solid var(--sage); color: var(--forest); font-size: .68rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.book-card h2 { margin: 28px 0 12px; font-size: 1.72rem; }
.book-card h2 a { color: var(--ink); text-decoration: none; }
.book-card h2 a:hover { color: var(--green); }
.book-card > p { color: var(--ink-soft); }
.book-card-foot { display: flex; justify-content: space-between; gap: 15px; align-items: end; margin-top: auto; padding-top: 20px; border-top: 1px solid var(--line); }
.book-card-foot > span { color: var(--ink-soft); font-size: .78rem; }
.text-link { display: inline-flex; align-items: center; gap: 6px; color: var(--green); font-size: .88rem; font-weight: 760; text-decoration: none; }
.empty-state { padding: 40px; border: 1px solid var(--line); background: var(--white); text-align: center; }

.content-sidebar-grid { display: grid; grid-template-columns: minmax(0, 1fr) 310px; gap: 28px; align-items: start; }
.content-panel { padding: 36px; }
.sticky-column { position: sticky; top: 105px; display: grid; gap: 16px; }
.source-card { padding: 26px; box-shadow: none; }
.source-card h2 { margin-bottom: 14px; font-size: 1.8rem; }
.source-card p { color: var(--ink-soft); }
.muted-card { background: #edf2ef; }
.compact-card { background: var(--paper-deep); }
.answer-note { display: flex; justify-content: space-between; gap: 20px; padding: 17px 19px; margin-bottom: 40px; border-left: 4px solid var(--green); background: var(--mint); }
.answer-note span { color: var(--ink-soft); font-size: .86rem; }
.answer-group + .answer-group { margin-top: 58px; }
.section-heading-inline { display: flex; justify-content: space-between; gap: 25px; align-items: end; margin-bottom: 24px; }
.section-heading-inline h2 { margin: 0; font-size: 2.15rem; }
.section-heading-inline > span { color: var(--ink-soft); font-size: .8rem; }
.answer-file-list { border-top: 1px solid var(--line); }
.answer-file-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 24px; align-items: center; padding: 16px 0; border-bottom: 1px solid var(--line); }
.answer-file-title { display: grid; grid-template-columns: 46px minmax(0, 1fr); gap: 14px; align-items: center; }
.answer-title-link { color: var(--ink); font-weight: 760; text-decoration: none; }
.answer-title-link:hover { color: var(--green); text-decoration: underline; }
.answer-file-row-single:hover { background: rgba(219,234,228,.44); }
.answer-number { width: 42px; height: 42px; display: grid; place-items: center; border: 1px solid var(--sage); color: var(--forest); font: 700 .78rem var(--sans); }
.answer-file-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px; }
.answer-file-link { display: inline-flex; align-items: center; gap: 8px; min-height: 40px; padding: 8px 12px; border: 1px solid var(--line); background: var(--white); color: var(--forest); font-size: .82rem; font-weight: 750; text-decoration: none; }
.answer-file-link:hover { border-color: var(--green); background: var(--mint); color: var(--forest); }
.chapter-list { padding: 0; margin: 24px 0 0; list-style: none; border-top: 1px solid var(--line); }
.chapter-list li { display: grid; grid-template-columns: 46px 1fr; gap: 14px; align-items: center; min-height: 58px; border-bottom: 1px solid var(--line); }
.chapter-list li span { color: var(--green); font-weight: 800; }

.choice-intro { max-width: 760px; margin-bottom: 38px; }
.choice-intro h2 { margin-bottom: 18px; }
.choice-intro > p:last-child { color: var(--ink-soft); }
.qualification-summary { display: grid; grid-template-columns: 1fr auto; gap: 30px; align-items: end; padding: 30px; margin-bottom: 24px; }
.qualification-summary h2 { margin-bottom: 12px; font-size: 2.3rem; }
.qualification-summary p { margin-bottom: 0; color: var(--ink-soft); }
.official-link-row { display: flex; flex-direction: column; align-items: flex-end; gap: 10px; }
.archive-summary { margin-bottom: 18px; }
.tracker-summary { display: grid; grid-template-columns: 1fr auto auto; gap: 30px; align-items: center; padding: 26px 30px; margin-bottom: 18px; box-shadow: none; }
.tracker-summary h2 { margin-bottom: 6px; font-size: 1.8rem; }
.tracker-summary p { margin-bottom: 0; color: var(--ink-soft); font-size: .9rem; }
.tracker-metrics { display: flex; gap: 25px; }
.tracker-metrics div { min-width: 85px; display: grid; text-align: center; }
.tracker-metrics strong { font: 400 2rem var(--serif); color: var(--forest); }
.tracker-metrics span { color: var(--ink-soft); font-size: .7rem; text-transform: uppercase; }
.year-jump { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; padding: 15px 18px; margin-bottom: 18px; border: 1px solid var(--line); background: rgba(255,255,255,.56); }
.year-jump span { margin-right: 5px; color: var(--ink-soft); font-size: .75rem; font-weight: 800; text-transform: uppercase; }
.year-jump a { padding: 5px 9px; border: 1px solid var(--line); background: var(--white); color: var(--ink); font-size: .78rem; text-decoration: none; }
.year-jump a:hover { border-color: var(--green); color: var(--green); }
.paper-archive { display: grid; gap: 12px; }
.paper-series { border: 1px solid var(--line); background: var(--white); }
.paper-series > summary { display: flex; justify-content: space-between; gap: 20px; align-items: center; padding: 20px 24px; list-style: none; cursor: pointer; }
.paper-series > summary::-webkit-details-marker { display: none; }
.paper-series > summary > div { display: flex; gap: 14px; align-items: center; }
.paper-series > summary strong { font: 400 1.55rem var(--serif); }
.paper-series > summary > span { color: var(--ink-soft); font-size: .78rem; }
.series-index { color: var(--green); font-size: .72rem; font-weight: 800; letter-spacing: .12em; }
.paper-series[open] > summary { border-bottom: 1px solid var(--line); background: #f8faf8; }
.paper-series-body { padding: 0 24px; }
.paper-card { padding: 28px 0; border-bottom: 1px solid var(--line); }
.paper-card:last-child { border-bottom: 0; }
.paper-card-main { display: grid; grid-template-columns: minmax(0, 1fr) minmax(250px, 320px); gap: 34px; }
.paper-code { display: inline-block; margin-bottom: 11px; padding: 3px 7px; border: 1px solid var(--sage); color: var(--forest); font-size: .68rem; font-weight: 800; letter-spacing: .08em; }
.paper-card h3 { margin-bottom: 9px; font-size: 1.28rem; }
.paper-card-main p:not(.paper-code) { color: var(--ink-soft); }
.paper-meta { display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 14px 0 0; list-style: none; }
.paper-meta li { padding: 4px 8px; background: var(--paper); color: var(--ink-soft); font-size: .74rem; }
.paper-links { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; align-content: start; }
.paper-resource { display: inline-flex; align-items: center; justify-content: space-between; gap: 8px; min-height: 42px; padding: 9px 11px; border: 1px solid var(--line); color: var(--ink); font-size: .78rem; font-weight: 720; text-decoration: none; }
.paper-resource:hover { border-color: var(--green); background: var(--mint); color: var(--forest); }
.paper-resource-paper { border-color: var(--green); }
.paper-resource-report { background: #f5f0e5; }
.paper-tracker-row { display: grid; grid-template-columns: 1fr 150px 64px 95px; gap: 12px; align-items: end; margin-top: 22px; padding: 14px; background: var(--paper); }
.paper-tracker-row label > span { margin-bottom: 5px; font-size: .65rem; }
.paper-tracker-row select, .paper-tracker-row input { min-height: 40px; background: var(--white); }
.score-entry { display: flex; align-items: center; border: 1px solid var(--line); background: var(--white); }
.score-entry input { min-width: 0; border: 0; }
.score-entry span { padding-right: 10px; color: var(--ink-soft); font-size: .8rem; }
.paper-tracker-row output { min-height: 40px; display: grid; place-items: center; border: 1px solid var(--line); background: var(--white); color: var(--forest); font-weight: 800; }
.paper-tracker-row small { align-self: center; color: var(--ink-soft); font-size: .7rem; }
.sample-section, .support-section { margin-top: 64px; }
.sample-archive .paper-series { background: #fbfaf5; }
.source-fallback { display: flex; justify-content: space-between; gap: 28px; align-items: center; padding: 26px; border: 1px solid var(--line); background: var(--white); }
.source-fallback p { margin: 5px 0 0; color: var(--ink-soft); }
.support-link-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.support-link { display: flex; justify-content: space-between; gap: 12px; padding: 18px; border: 1px solid var(--line); background: var(--white); color: var(--ink); font-weight: 700; text-decoration: none; }
.support-link:hover { background: var(--mint); color: var(--forest); }
.archive-note { display: grid; grid-template-columns: 180px 1fr; gap: 25px; padding: 24px 28px; margin-top: 24px; border: 1px solid var(--ochre); background: #fff9e9; }
.archive-note p { margin: 0; color: var(--ink-soft); }

.boundary-controls { display: grid; grid-template-columns: 1.2fr .9fr 1fr; gap: 18px; padding: 27px; margin-bottom: 18px; }
.mark-entry { display: flex; align-items: center; min-height: 47px; margin-top: 7px; border: 1px solid var(--line); }
.mark-entry input { flex: 1; min-width: 0; margin: 0; border: 0; }
.mark-entry span { padding-right: 12px; color: var(--ink-soft); }
.boundary-result { display: grid; grid-template-columns: 125px 1fr 150px; gap: 28px; align-items: center; padding: 25px 30px; margin-bottom: 18px; box-shadow: none; }
.grade-disc { width: 105px; aspect-ratio: 1; display: grid; place-items: center; border-radius: 50%; background: var(--forest); color: var(--white); }
.grade-disc span { font: 400 3.15rem/1 var(--serif); }
.result-copy h2 { margin-bottom: 7px; font-size: 2rem; }
.result-copy p { margin-bottom: 0; color: var(--ink-soft); }
.result-stat { display: grid; padding-left: 24px; border-left: 1px solid var(--line); }
.result-stat span { color: var(--forest); font: 400 2rem var(--serif); }
.result-stat small { color: var(--ink-soft); font-size: .68rem; line-height: 1.3; text-transform: uppercase; }
.boundary-layout { display: grid; grid-template-columns: .82fr 1.18fr; gap: 18px; }
.boundary-table-panel, .boundary-chart-panel { min-width: 0; padding: 28px; box-shadow: none; }
.panel-heading { display: flex; justify-content: space-between; gap: 20px; align-items: end; margin-bottom: 22px; }
.panel-heading h2 { margin: 0; font-size: 1.8rem; }
.boundary-table { border-top: 1px solid var(--line); }
.boundary-table > div { display: grid; grid-template-columns: 60px 1fr 60px; align-items: center; min-height: 48px; border-bottom: 1px solid var(--line); }
.boundary-table strong { color: var(--forest); font: 400 1.45rem var(--serif); }
.boundary-table span { font-weight: 700; }
.boundary-table small { color: var(--ink-soft); text-align: right; }
.gap-note, .source-small { margin: 18px 0 0; color: var(--ink-soft); font-size: .8rem; }
.chart-grade-label { display: flex; align-items: center; gap: 8px; white-space: nowrap; }
.chart-grade-label span { margin: 0; }
.chart-grade-label select { width: 78px; min-height: 39px; }
.chart-wrap { width: 100%; max-width: 100%; min-height: 315px; overflow-x: auto; }
.boundary-chart { min-width: 620px; width: 100%; height: auto; }
.chart-grid { stroke: var(--line); stroke-width: 1; }
.chart-axis-label { fill: var(--ink-soft); font: 12px var(--sans); }
.chart-line { fill: none; stroke: var(--green); stroke-width: 4; stroke-linejoin: round; stroke-linecap: round; }
.chart-dot { fill: var(--white); stroke: var(--green); stroke-width: 3; }
.chart-value { fill: var(--ink); font: 700 12px var(--sans); text-anchor: middle; }
.boundary-warning { display: grid; grid-template-columns: 245px 1fr; gap: 28px; padding: 24px 28px; margin-top: 18px; border: 1px solid var(--ochre); background: #fff9e9; }
.boundary-warning p { margin: 0; color: var(--ink-soft); }

.article-layout { display: grid; grid-template-columns: minmax(0, 760px) 300px; gap: 70px; align-items: start; }
.article-body h2 { margin: 52px 0 16px; font-size: 2.25rem; }
.article-body h2:first-child { margin-top: 0; }
.article-body p { color: var(--ink-soft); }
.article-aside { position: sticky; top: 105px; display: grid; gap: 15px; }
.error-page { min-height: 70vh; display: grid; align-items: center; padding: 100px 0; background: var(--paper); }
.error-code { margin-bottom: 10px; color: var(--clay); font: 400 4rem/1 var(--serif); }
.error-page h1 { font-size: clamp(2.6rem, 6vw, 4.8rem); }

.site-footer { padding: 68px 0 28px; background: var(--forest-deep); color: var(--white); }
.footer-grid { display: grid; grid-template-columns: 1.3fr .7fr .7fr; gap: 68px; }
.footer-brand { color: var(--white); }
.footer-brand:hover { color: var(--white); }
.footer-brand small { color: #a9c9be; }
.footer-grid > div:first-child > p { max-width: 370px; margin-top: 22px; color: #c7d7d2; }
.footer-grid h2 { margin-bottom: 14px; color: #a9c9be; font: 800 .72rem var(--sans); letter-spacing: .12em; text-transform: uppercase; }
.footer-grid > div:not(:first-child) { display: flex; flex-direction: column; align-items: flex-start; gap: 8px; }
.footer-grid a { color: #e3eeeb; font-size: .88rem; text-decoration: none; }
.footer-grid a:hover { color: var(--white); text-decoration: underline; }
.footer-lower { display: flex; justify-content: space-between; gap: 30px; padding-top: 28px; margin-top: 58px; border-top: 1px solid var(--line-dark); }
.footer-lower p { margin: 0; color: #aebfba; font-size: .72rem; }
.footer-lower p:last-child { max-width: 720px; text-align: right; }

@media (max-width: 980px) {
    .hero-grid, .split-heading, .dark-callout { grid-template-columns: 1fr; gap: 34px; }
    .hero-figure { max-width: 590px; margin-inline: auto; }
    .resource-launch-grid { grid-template-columns: 1fr; }
    .launch-card { min-height: 220px; border-right: 0; border-bottom: 1px solid var(--line); }
    .launch-card:last-child { border-bottom: 0; }
    .book-results { grid-template-columns: repeat(2, 1fr); }
    .content-sidebar-grid, .article-layout { grid-template-columns: 1fr; }
    .sticky-column, .article-aside { position: static; }
    .paper-card-main { grid-template-columns: 1fr; }
    .boundary-layout { grid-template-columns: 1fr; }
    .tracker-summary { grid-template-columns: 1fr auto; }
    .tracker-summary .button { grid-column: 1 / -1; justify-self: start; }
    .footer-grid { gap: 35px; }
}

@media (max-width: 730px) {
    body { font-size: 16px; }
    .site-shell, .narrow-shell { width: min(calc(100% - 28px), var(--shell)); }
    .section { padding: 66px 0; }
    .section-tight { padding: 40px 0 66px; }
    .section-overlap { margin-top: -34px; }
    .header-inner { min-height: 68px; }
    .brand-mark { width: 34px; height: 34px; }
    .menu-toggle { display: inline-flex; }
    .site-nav { position: fixed; inset: 68px 0 auto 0; display: none; flex-direction: column; align-items: stretch; padding: 14px; background: var(--white); border-bottom: 1px solid var(--line); box-shadow: var(--shadow); }
    .site-nav.is-open { display: flex; }
    .site-nav a { padding: 14px; border-bottom: 1px solid var(--line); }
    .home-hero { min-height: 0; padding: 62px 0 88px; }
    .hero-grid { gap: 24px; }
    .hero-copy h1 { font-size: clamp(2.85rem, 13vw, 4.2rem); }
    .hero-figure { margin: 12px -8px 0; }
    .resource-launch-grid { box-shadow: none; }
    .launch-card { padding: 25px; }
    .level-choice-grid, .qualification-choice-grid, .tier-choice-grid, .book-results { grid-template-columns: 1fr; }
    .level-choice, .qualification-choice, .tier-choice { min-height: 235px; padding: 26px; }
    .page-hero, .book-detail-hero { min-height: 350px; padding: 52px 0 84px; }
    .book-meta { grid-template-columns: 1fr; }
    .book-meta div { border-right: 0; border-bottom: 1px solid var(--line-dark); }
    .book-meta div:last-child { border-bottom: 0; }
    .filter-panel, .content-panel { padding: 22px 19px; }
    .filter-heading { align-items: flex-start; flex-direction: column; gap: 12px; }
    .filter-grid { grid-template-columns: 1fr; }
    .book-card { min-height: 0; }
    .book-card-foot { align-items: flex-start; flex-direction: column; }
    .answer-note { flex-direction: column; gap: 3px; }
    .section-heading-inline { align-items: flex-start; flex-direction: column; }
    .answer-file-row { grid-template-columns: 1fr; gap: 12px; }
    .answer-file-actions { justify-content: flex-start; padding-left: 56px; }
    .answer-file-link { flex: 1 1 150px; }
    .qualification-summary { grid-template-columns: 1fr; padding: 23px; }
    .official-link-row { align-items: flex-start; }
    .tracker-summary { grid-template-columns: 1fr; padding: 23px; }
    .tracker-metrics { justify-content: flex-start; }
    .paper-series > summary { padding: 17px; }
    .paper-series-body { padding: 0 17px; }
    .paper-links { grid-template-columns: 1fr 1fr; }
    .paper-tracker-row { grid-template-columns: 1fr 1fr; }
    .paper-tracker-row small { grid-column: 1 / -1; }
    .source-fallback { align-items: flex-start; flex-direction: column; }
    .support-link-grid { grid-template-columns: 1fr; }
    .archive-note { grid-template-columns: 1fr; gap: 8px; }
    .boundary-controls { grid-template-columns: 1fr; padding: 21px; }
    .boundary-result { grid-template-columns: 82px 1fr; gap: 18px; padding: 22px; }
    .grade-disc { width: 78px; }
    .grade-disc span { font-size: 2.45rem; }
    .result-stat { grid-column: 1 / -1; padding: 17px 0 0; border-top: 1px solid var(--line); border-left: 0; }
    .boundary-table-panel, .boundary-chart-panel { padding: 21px; overflow: hidden; }
    .panel-heading { align-items: flex-start; flex-direction: column; }
    .boundary-warning { grid-template-columns: 1fr; gap: 8px; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-lower { align-items: flex-start; flex-direction: column; }
    .footer-lower p:last-child { text-align: left; }
}

@media (max-width: 470px) {
    .paper-links { grid-template-columns: 1fr; }
    .paper-tracker-row { grid-template-columns: 1fr; }
    .answer-file-actions { padding-left: 0; }
    .answer-file-title { grid-template-columns: 42px 1fr; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}