/* tabbr Learn pages: field guide, approach, sovereignty, glossary, AI readiness.
   Tokens follow the homepage (index.html). Dark is the homepage look; light is derived from the same ink and violet. */
:root {
  --bg: #F7F6FB; --surface: #FFFFFF; --panel: #F0EEF8; --line: #E4E0F0; --line-2: #CFC8E6;
  --fg: #15122B; --fg-2: #2E2950; --mut: #554F73; --dim: #6A6488;
  --vio: #5B3DF0; --vio-fill: #7C5CFF; --vio-soft: #4B30D6; --vio-wash: rgba(124, 92, 255, .10);
  --mint: #0E7C70; --amber: #9A5B00; --rose: #B3261E;
  --c1: #6A4BE8; --c2: #0E8C7E; --c-neutral: #A7A2BC; --grid: #ECE9F4; --axis: #8F89AA;
  --tip-bg: #15122B; --tip-fg: #F4F2FF;
  --f-disp: 'Bricolage Grotesque', 'Helvetica Neue', Arial, sans-serif;
  --f-body: 'Instrument Sans', 'Helvetica Neue', Arial, sans-serif;
  --f-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --r: 16px; --wrap: 1200px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0B0918; --surface: #16122C; --panel: #1C1738; --line: #2A2448; --line-2: #3A3263;
    --fg: #F4F2FF; --fg-2: #D8D3F0; --mut: #A49DC4; --dim: #8F88B3;
    --vio: #9B82FF; --vio-fill: #7C5CFF; --vio-soft: #B9A9FF; --vio-wash: rgba(124, 92, 255, .14);
    --mint: #5EEAD4; --amber: #F5B94E; --rose: #F49393;
    --c1: #8A6CF7; --c2: #26A99A; --c-neutral: #5B5578; --grid: #241F40; --axis: #6E6793;
    --tip-bg: #F4F2FF; --tip-fg: #15122B;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0B0918; --surface: #16122C; --panel: #1C1738; --line: #2A2448; --line-2: #3A3263;
  --fg: #F4F2FF; --fg-2: #D8D3F0; --mut: #A49DC4; --dim: #8F88B3;
  --vio: #9B82FF; --vio-fill: #7C5CFF; --vio-soft: #B9A9FF; --vio-wash: rgba(124, 92, 255, .14);
  --mint: #5EEAD4; --amber: #F5B94E; --rose: #F49393;
  --c1: #8A6CF7; --c2: #26A99A; --c-neutral: #5B5578; --grid: #241F40; --axis: #6E6793;
  --tip-bg: #F4F2FF; --tip-fg: #15122B;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { background: var(--bg); -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--fg); font-family: var(--f-body); font-size: 17px; line-height: 1.6; -webkit-font-smoothing: antialiased; overflow-x: hidden; }
a { color: var(--vio); text-underline-offset: 3px; }
a:hover { color: var(--vio-soft); }
:focus-visible { outline: 2px solid var(--vio); outline-offset: 3px; border-radius: 4px; }
img, svg { max-width: 100%; }
p { margin: 0; }
strong { font-weight: 600; color: var(--fg); }
.wrap { max-width: var(--wrap); margin: 0 auto; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); }
.skip { position: absolute; left: -9999px; top: 8px; z-index: 100; background: var(--surface); color: var(--fg); padding: 10px 14px; border-radius: 8px; }
.skip:focus { left: 16px; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* Type */
h1, h2, h3, h4 { font-family: var(--f-disp); margin: 0; letter-spacing: -.025em; line-height: 1.08; text-wrap: balance; }
h1 { font-size: clamp(40px, 6vw, 72px); font-weight: 800; letter-spacing: -.035em; line-height: 1; }
h2 { font-size: clamp(28px, 3.4vw, 40px); font-weight: 700; }
h3 { font-size: 20px; font-weight: 700; letter-spacing: -.015em; }
h4 { font-size: 17px; font-weight: 700; letter-spacing: -.01em; }
.eyebrow { font-family: var(--f-mono); font-size: 12px; letter-spacing: .14em; text-transform: uppercase; color: var(--vio); margin: 0; }
.lede { font-size: clamp(18px, 2vw, 20.5px); color: var(--mut); max-width: 640px; line-height: 1.5; }
.mono { font-family: var(--f-mono); }
.muted { color: var(--mut); }
.prose { display: grid; gap: 1em; max-width: 68ch; }
.prose ul, .prose ol { margin: 0; padding-left: 1.2em; display: grid; gap: .4em; }

/* Buttons and chips */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 46px; padding: 0 20px; border-radius: 12px; font: 600 15px/1 var(--f-body); text-decoration: none; cursor: pointer; border: 0; background: var(--vio-fill); color: #fff; }
.btn:hover { background: #6B4BF0; color: #fff; }
.btn.ghost { background: transparent; color: var(--fg); box-shadow: inset 0 0 0 1px var(--line-2); }
.btn.ghost:hover { background: var(--vio-wash); color: var(--fg); }
.chip { display: inline-flex; align-items: center; gap: 6px; font: 500 12px/1 var(--f-mono); padding: 8px 11px; border-radius: 999px; background: transparent; color: var(--fg-2); border: 1px solid var(--line-2); cursor: pointer; min-height: 36px; }
.chip[aria-pressed="true"] { background: var(--vio-fill); border-color: var(--vio-fill); color: #fff; }
.tag { display: inline-block; font: 500 11.5px/1 var(--f-mono); padding: 6px 9px; border-radius: 7px; background: var(--vio-wash); color: var(--vio); white-space: nowrap; }

/* Nav */
.nav { position: sticky; top: 0; z-index: 50; background: color-mix(in srgb, var(--bg) 82%, transparent); backdrop-filter: saturate(1.4) blur(14px); -webkit-backdrop-filter: saturate(1.4) blur(14px); border-bottom: 1px solid var(--line); }
.nav .wrap { display: flex; align-items: center; gap: 16px; min-height: 64px; }
.logo { display: flex; align-items: center; flex: none; }
.logo img { height: 30px; width: auto; display: block; }
.logo .on-dark { display: none; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .logo .on-dark { display: block; } :root:not([data-theme="light"]) .logo .on-light { display: none; } }
:root[data-theme="dark"] .logo .on-dark { display: block; }
:root[data-theme="dark"] .logo .on-light { display: none; }
.nav-links { display: flex; align-items: center; gap: 2px; list-style: none; margin: 0 0 0 12px; padding: 0; flex: 1; }
.nav-links a, .nav-links button { display: block; padding: 9px 12px; border-radius: 9px; color: var(--fg-2); text-decoration: none; font: 500 14.5px/1.2 var(--f-body); background: none; border: 0; cursor: pointer; }
.nav-links a:hover, .nav-links button:hover { background: var(--vio-wash); color: var(--fg); }
.nav-links a[aria-current="page"] { color: var(--fg); box-shadow: inset 0 -2px 0 var(--vio); border-radius: 0; }
.learn { position: relative; }
.learn button::after { content: ""; display: inline-block; width: 6px; height: 6px; margin-left: 8px; border-right: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor; transform: translateY(-3px) rotate(45deg); }
.learn-menu { position: absolute; top: calc(100% + 6px); left: 0; min-width: 260px; background: var(--surface); border: 1px solid var(--line-2); border-radius: 12px; padding: 6px; box-shadow: 0 18px 50px rgba(10, 8, 30, .18); display: none; list-style: none; margin: 0; }
.learn-menu.open { display: grid; }
.learn-menu a { display: grid; gap: 2px; padding: 10px 12px; border-radius: 8px; }
.learn-menu a span { font-size: 13px; color: var(--mut); }
.learn-menu a[aria-current="page"] { box-shadow: none; background: var(--vio-wash); border-radius: 8px; }
.nav-right { display: flex; align-items: center; gap: 8px; margin-left: auto; }
.nav-right .btn { min-height: 40px; padding: 0 16px; font-size: 14px; }
.theme-toggle { width: 40px; height: 40px; border-radius: 10px; border: 1px solid var(--line-2); background: transparent; color: var(--fg-2); cursor: pointer; display: inline-flex; align-items: center; justify-content: center; }
.theme-toggle svg { width: 18px; height: 18px; }
@media (max-width: 860px) {
  .nav-links .hide-sm { display: none; }
  .nav-links { margin-left: 4px; }
}
@media (max-width: 520px) {
  .nav-right .btn { display: none; }
  .logo img { height: 26px; }
  .learn-menu { position: fixed; left: 16px; right: 16px; top: 62px; min-width: 0; }
}

/* Hero */
.hero { padding-block: clamp(44px, 7vw, 92px) clamp(28px, 4vw, 48px); display: grid; gap: 22px; }
.byline { font-family: var(--f-mono); font-size: 12.5px; color: var(--dim); display: flex; gap: 16px; flex-wrap: wrap; }
.hero .ctas { display: flex; gap: 12px; flex-wrap: wrap; }

/* Stat strip */
.stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 2px solid var(--fg); border-bottom: 1px solid var(--line); margin-top: 8px; }
.stat { padding: 18px 18px 20px 0; display: grid; gap: 8px; align-content: start; }
.stat + .stat { padding-left: 18px; border-left: 1px solid var(--line); }
.stat .num { font-family: var(--f-disp); font-weight: 800; font-size: clamp(34px, 4vw, 46px); letter-spacing: -.035em; line-height: 1; font-variant-numeric: tabular-nums; color: var(--vio); }
.stat p { font-size: 15px; line-height: 1.4; color: var(--fg-2); }
.stat cite { font-family: var(--f-mono); font-size: 11.5px; color: var(--dim); font-style: normal; }
.stat cite a { color: inherit; }
@media (max-width: 900px) {
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stat:nth-child(3) { padding-left: 0; border-left: 0; }
  .stat:nth-child(n+3) { border-top: 1px solid var(--line); }
}
@media (max-width: 520px) {
  .stats { grid-template-columns: minmax(0, 1fr); }
  .stat, .stat + .stat { padding-left: 0; border-left: 0; }
  .stat + .stat { border-top: 1px solid var(--line); }
}

/* Article with layer rail */
.article { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 56px; padding-block: 24px 72px; }
.rail { position: sticky; top: 88px; align-self: start; display: grid; gap: 1px; font-size: 14px; max-height: calc(100vh - 110px); overflow-y: auto; }
.rail .rail-h { font-family: var(--f-mono); font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: var(--dim); margin-bottom: 8px; }
.rail a { color: var(--mut); text-decoration: none; padding: 5px 0 5px 12px; border-left: 2px solid var(--line); }
.rail a:hover, .rail a.on { color: var(--fg); border-left-color: var(--vio); }
.body { min-width: 0; display: grid; gap: 72px; }
.section { display: grid; gap: 20px; scroll-margin-top: 84px; min-width: 0; }
.layer-tag { font-family: var(--f-mono); font-size: 12.5px; color: var(--vio); letter-spacing: .04em; }
@media (max-width: 960px) {
  .article { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .rail { display: none; }
}

/* "For your organization" note */
.fyo { background: var(--vio-wash); border-left: 3px solid var(--vio); border-radius: 0 12px 12px 0; padding: 16px 20px; max-width: 68ch; display: grid; gap: 6px; font-size: 16px; color: var(--fg-2); }
.fyo b { font-family: var(--f-mono); font-size: 11.5px; letter-spacing: .1em; text-transform: uppercase; color: var(--vio); font-weight: 600; }

/* Figures, charts, tooltip */
.figure { margin: 0; display: grid; gap: 10px; min-width: 0; }
.figure .frame { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 20px; min-width: 0; }
.figure .head { display: grid; gap: 4px; margin-bottom: 10px; }
.figure .ctitle { font-family: var(--f-disp); font-weight: 700; font-size: 18px; letter-spacing: -.015em; line-height: 1.25; }
.figure .csub { font-size: 14.5px; color: var(--mut); }
.figure figcaption { font-family: var(--f-mono); font-size: 12px; color: var(--dim); line-height: 1.55; }
.figure figcaption a { color: var(--mut); }
.legend { display: flex; gap: 16px; flex-wrap: wrap; font-family: var(--f-mono); font-size: 12px; color: var(--mut); margin-bottom: 6px; }
.legend i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin-right: 6px; vertical-align: -1px; }
.legend i.dash { background: transparent !important; border: 1.5px dashed var(--c1); }
.chart { min-width: 0; overflow: hidden; }
.chart svg { display: block; width: 100%; height: auto; overflow: visible; }
.chart text { font-family: var(--f-mono); }
.chart [tabindex]:focus { outline: none; }
.chart [tabindex]:focus-visible .hit { stroke: var(--vio); stroke-width: 2; }
.figure details { font-size: 14px; color: var(--mut); }
.figure details summary { cursor: pointer; font-family: var(--f-mono); font-size: 12px; color: var(--mut); padding: 6px 0; }
.figure details table { margin-top: 8px; }
#tip { position: fixed; z-index: 80; pointer-events: none; background: var(--tip-bg); color: var(--tip-fg); font: 12.5px/1.45 var(--f-mono); padding: 8px 11px; border-radius: 8px; max-width: 280px; box-shadow: 0 8px 24px rgba(0, 0, 0, .2); }
#tip[hidden] { display: none; }

/* Diagrams: inline SVG that scales; text wears tokens */
.diagram svg { display: block; width: 100%; max-width: 460px; height: auto; margin-inline: auto; }
.diagram svg a:focus-visible rect { stroke-width: 3; }
.diagram svg text { font-family: var(--f-body); }
.d-box { fill: var(--surface); stroke: var(--line-2); stroke-width: 1.5; }
.d-acc { fill: var(--vio-wash); stroke: var(--vio); stroke-width: 1.5; }
.d-mint { fill: var(--surface); stroke: var(--c2); stroke-width: 1.5; }
.d-t { fill: var(--fg); font-weight: 700; }
.d-s { fill: var(--mut); }
.d-v { fill: var(--vio); font-weight: 700; }
.d-line { stroke: var(--axis); stroke-width: 1.5; fill: none; }
.d-vline { stroke: var(--vio); stroke-width: 1.8; fill: none; }
.d-dash { stroke: var(--vio); stroke-width: 1.5; fill: none; stroke-dasharray: 6 5; }
.d-arrow { fill: var(--axis); }
.d-arrow-v { fill: var(--vio); }

/* Tables */
.tablewrap { overflow-x: auto; max-width: 100%; border: 1px solid var(--line); border-radius: var(--r); background: var(--surface); }
table.t { border-collapse: collapse; width: 100%; font-size: 14.5px; min-width: 640px; }
table.t.narrow { min-width: 0; }
table.t th, table.t td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
table.t tr:last-child td, table.t tr:last-child th { border-bottom: 0; }
table.t thead th { font: 500 11.5px/1.3 var(--f-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--dim); background: var(--panel); }
table.t tbody th { font-family: var(--f-disp); font-weight: 700; color: var(--fg); }
table.t td { color: var(--fg-2); }
table.t .hl { background: var(--vio-wash); }
.tnote { font-family: var(--f-mono); font-size: 12px; color: var(--dim); margin-top: 8px; }
.tnote a { color: var(--mut); }

/* Grids, cards, steps */
.grid2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.grid3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.grid4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 22px; display: grid; gap: 10px; align-content: start; min-width: 0; }
.card p { color: var(--mut); font-size: 15.5px; }
.card .k { font: 500 12px var(--f-mono); color: var(--dim); }
a.card { text-decoration: none; color: inherit; }
a.card:hover { border-color: var(--vio); }
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; counter-reset: s; }
.steps li { counter-increment: s; display: grid; gap: 8px; align-content: start; border-top: 2px solid var(--fg); padding-top: 14px; }
.steps li::before { content: counter(s, decimal-leading-zero); font: 600 13px var(--f-mono); color: var(--vio); }
.steps p { color: var(--mut); font-size: 15.5px; }
@media (max-width: 900px) { .grid3, .grid4, .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .grid2, .grid3, .grid4, .steps { grid-template-columns: minmax(0, 1fr); } }

/* Bands, CTA, sources, footer */
.band { background: var(--panel); border-block: 1px solid var(--line); }
.band .inner { padding-block: clamp(44px, 6vw, 80px); display: grid; gap: 28px; }
.page-sec { padding-block: clamp(40px, 6vw, 72px); display: grid; gap: 24px; }
.cta-box { display: grid; gap: 16px; padding: clamp(28px, 5vw, 48px); border-radius: 20px; background: var(--surface); border: 1px solid var(--line-2); }
.cta-box .row { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.cta-box small { font-family: var(--f-mono); font-size: 12.5px; color: var(--dim); }
.sources ol { margin: 0; padding-left: 1.4em; display: grid; gap: 8px; font-size: 14.5px; color: var(--mut); }
.sources li a { word-break: break-word; }
.pull { font-family: var(--f-disp); font-size: clamp(22px, 2.8vw, 30px); line-height: 1.25; letter-spacing: -.02em; max-width: 32ch; border-top: 2px solid var(--fg); padding-top: 16px; font-weight: 600; }
footer.foot { border-top: 1px solid var(--line); margin-top: 24px; }
footer.foot .wrap { padding-block: 32px; display: flex; gap: 24px; flex-wrap: wrap; justify-content: space-between; font-size: 14px; color: var(--mut); }
footer.foot nav { display: flex; gap: 18px; flex-wrap: wrap; }
footer.foot a { color: var(--fg-2); text-decoration: none; }
footer.foot a:hover { color: var(--vio); }

/* Checklist (sovereignty) */
.checklist { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }
.checklist li { display: flex; gap: 12px; align-items: flex-start; padding: 12px 0; border-bottom: 1px solid var(--line); }
.checklist input { width: 20px; height: 20px; margin-top: 3px; accent-color: var(--vio-fill); flex: none; }
.checklist label { display: grid; gap: 2px; cursor: pointer; }
.checklist label span { font-size: 14.5px; color: var(--mut); }
.progress { font-family: var(--f-mono); font-size: 13px; color: var(--mut); }

/* Glossary */
.gl-tools { display: grid; gap: 14px; position: sticky; top: 64px; z-index: 5; background: var(--bg); padding-block: 14px; border-bottom: 1px solid var(--line); }
.gl-search { width: 100%; height: 50px; border-radius: 12px; border: 1px solid var(--line-2); background: var(--surface); color: var(--fg); padding: 0 16px; font: 400 16px var(--f-body); }
.gl-chips { display: flex; gap: 8px; flex-wrap: wrap; }
.gl-group { display: grid; gap: 14px; padding-top: 32px; }
.gl-group[hidden], .term[hidden] { display: none; }
.gl-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin: 0; }
.term { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 18px 20px; display: grid; gap: 8px; align-content: start; scroll-margin-top: 200px; }
.term dt { font-family: var(--f-disp); font-weight: 700; font-size: 18px; letter-spacing: -.01em; }
.term dd { margin: 0; color: var(--fg-2); font-size: 15.5px; }
.term dd.ex { color: var(--mut); font-size: 14.5px; border-top: 1px dashed var(--line-2); padding-top: 8px; }
.term dd.ex b { font: 600 11px var(--f-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--vio); margin-right: 6px; }
.gl-empty { color: var(--mut); padding: 24px 0; }
@media (max-width: 760px) { .gl-list { grid-template-columns: minmax(0, 1fr); } .gl-tools { position: static; } }

/* AI readiness */
.quiz { display: grid; gap: 18px; max-width: 760px; }
.q { border: 1px solid var(--line); border-radius: 14px; padding: 18px 20px; background: var(--surface); margin: 0; display: grid; gap: 10px; min-width: 0; }
.q legend { font-family: var(--f-disp); font-weight: 700; font-size: 17.5px; letter-spacing: -.01em; padding: 0; line-height: 1.3; }
.q legend small { display: block; font: 500 11.5px var(--f-mono); color: var(--vio); letter-spacing: .06em; text-transform: uppercase; margin-bottom: 6px; }
.q label { display: flex; gap: 10px; align-items: flex-start; padding: 8px 10px; border-radius: 10px; cursor: pointer; color: var(--fg-2); font-size: 15.5px; }
.q label:hover { background: var(--vio-wash); }
.q input { margin-top: 4px; accent-color: var(--vio-fill); width: 18px; height: 18px; flex: none; }
.result { display: grid; gap: 18px; padding: 24px; border-radius: 16px; border: 1px solid var(--vio); background: var(--surface); max-width: 760px; }
.result[hidden] { display: none; }
.meter { display: grid; gap: 6px; }
.meter .bar { height: 10px; border-radius: 999px; background: var(--grid); overflow: hidden; }
.meter .bar i { display: block; height: 100%; border-radius: 999px; background: var(--c1); }
.meter.gov .bar i { background: var(--c2); }
.meter .lab { display: flex; justify-content: space-between; font: 500 13px var(--f-mono); color: var(--fg-2); }

@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
@media print { .nav, .rail, .theme-toggle, footer.foot { display: none; } body { background: #fff; color: #000; } }

/* Vendor questions (sovereignty) */
.qlist { margin: 0; padding-left: 1.4em; display: grid; gap: .8em; color: var(--fg-2); font-size: 15.5px; }
.qlist li::marker { font-family: var(--f-mono); color: var(--vio); }

/* Small screens: keep diagram text at its designed size; the frame scrolls, not the page */
@media (max-width: 520px) {
  .figure .frame { padding: 14px; }
  .diagram .frame { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .diagram svg { min-width: 360px; }
}