:root {
  --paper: #f7f9fc;
  --white: #fff;
  --ink: #101828;
  --muted: #5b6675;
  --line: #d7dee8;
  --green: #086cf0;
  --green-dark: #0b2552;
  --green-soft: #e1edff;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --shell: min(1180px, calc(100% - 40px));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: var(--sans); line-height: 1.6; }
a { color: inherit; }
.shell { width: var(--shell); margin-inline: auto; }
.skip-link { position: fixed; top: 8px; left: 8px; z-index: 100; padding: 10px 14px; color: var(--white); background: var(--green-dark); transform: translateY(-150%); }
.skip-link:focus { transform: none; }

.site-header { position: sticky; top: 0; z-index: 20; background: rgba(247, 248, 245, .94); border-bottom: 1px solid var(--line); backdrop-filter: blur(14px); }
.nav { min-height: 72px; display: flex; align-items: center; gap: 28px; }
.wordmark { display: inline-flex; align-items: center; gap: 10px; margin-right: auto; font-weight: 700; text-decoration: none; letter-spacing: -.02em; white-space: nowrap; }
.wordmark-mark { display: block; width: 36px; height: 36px; object-fit: cover; border-radius: 8px; }
.nav-links { display: flex; align-items: center; gap: 24px; font-size: .88rem; }
.nav-links a { color: var(--muted); text-decoration: none; }
.nav-links a:hover, .nav-links a:focus-visible { color: var(--ink); }

.button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 46px; padding: 0 19px; border: 1px solid var(--green-dark); color: var(--white); background: var(--green-dark); font-weight: 650; font-size: .9rem; text-decoration: none; }
.button:hover { background: var(--green); }
.button-small { min-height: 38px; padding-inline: 14px; }
.button-outline { color: var(--green-dark); background: transparent; }
.button-outline:hover { color: var(--white); background: var(--green-dark); }
.button-light { color: var(--green-dark); background: var(--white); border-color: var(--white); }
.button-light:hover { color: var(--white); background: transparent; }
.text-link { display: inline-flex; gap: 10px; align-items: center; color: var(--green-dark); font-weight: 650; text-underline-offset: 4px; }
.text-link-light { color: var(--white); }

.section { padding: 112px 0; }
.ruled { border-top: 1px solid var(--line); }
.hero { min-height: calc(100vh - 72px); display: grid; align-items: center; padding-block: 80px; background: linear-gradient(125deg, var(--paper) 0 68%, var(--green-soft) 68%); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.12fr) minmax(400px, .88fr); align-items: center; gap: clamp(50px, 7vw, 96px); }
.eyebrow, .section-index { margin: 0 0 22px; color: var(--green); font: 700 .75rem/1.4 var(--mono); letter-spacing: .1em; text-transform: uppercase; }
h1, h2 { margin: 0; font-weight: 650; line-height: 1.05; letter-spacing: -.055em; }
h1 { max-width: 850px; font-size: clamp(3.4rem, 6.5vw, 6.25rem); }
h2 { max-width: 540px; font-size: clamp(2.25rem, 4.2vw, 4rem); }
.lede { max-width: 690px; margin: 32px 0; color: var(--muted); font-size: clamp(1.1rem, 1.8vw, 1.35rem); }
.actions { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.definition { max-width: 720px; margin: 0 0 32px; border-left: 2px solid var(--green); }
.definition p { display: grid; grid-template-columns: 112px 1fr; gap: 18px; margin: 0; padding: 9px 0 9px 20px; color: var(--muted); font-size: .9rem; }
.definition span { color: var(--green); font: 700 .7rem/1.6 var(--mono); text-transform: uppercase; }
.definition strong { color: var(--ink); font-weight: 600; }
.value-line { display: flex; flex-wrap: wrap; gap: 10px 24px; margin: 38px 0 0; color: var(--muted); font: .75rem/1.5 var(--mono); }
.value-line span:not(:last-child)::after { content: " /"; margin-left: 24px; color: var(--green); }

.ecosystem-panel { overflow: hidden; color: #d6e6fb; background: #07162f; border: 1px solid #1c3f6d; box-shadow: 22px 22px 0 rgba(16, 25, 21, .08); }
.ecosystem-meta { display: flex; justify-content: space-between; gap: 20px; padding: 14px 18px; color: #8fa8c9; border-bottom: 1px solid #1c3f6d; font: .65rem/1.4 var(--mono); letter-spacing: .07em; }
.ecosystem-diagram { position: relative; min-height: 390px; overflow: hidden; background-image: linear-gradient(rgba(87,201,142,.055) 1px, transparent 1px), linear-gradient(90deg, rgba(87,201,142,.055) 1px, transparent 1px); background-size: 24px 24px; }
.network-ring { position: absolute; top: 50%; left: 50%; border: 1px solid #234f87; border-radius: 50%; transform: translate(-50%, -50%); }
.network-ring-outer { width: 290px; height: 290px; }
.network-ring-inner { width: 190px; height: 190px; border-style: dashed; }
.connector { position: absolute; z-index: 1; background: #2f72c9; }
.connector-north, .connector-south { left: calc(50% - 1px); width: 1px; height: 110px; }
.connector-north { top: 54px; }
.connector-south { bottom: 54px; }
.connector-east, .connector-west { top: calc(50% - 1px); width: 110px; height: 1px; }
.connector-east { right: 54px; }
.connector-west { left: 54px; }
.network-node, .network-core { position: absolute; z-index: 2; display: grid; place-items: center; text-align: center; font: .67rem/1.3 var(--mono); }
.network-node { width: 90px; min-height: 42px; padding: 7px; color: #a9c9f3; background: #0d2a54; border: 1px solid #2f72c9; }
.node-top { top: 30px; left: 50%; transform: translateX(-50%); }
.node-right { top: 50%; right: 28px; transform: translateY(-50%); }
.node-bottom { bottom: 30px; left: 50%; transform: translateX(-50%); }
.node-left { top: 50%; left: 28px; transform: translateY(-50%); }
.network-core { top: 50%; left: 50%; width: 132px; height: 132px; border-radius: 50%; color: #c5dcfb; background: var(--green-dark); border: 1px solid #4b98ff; transform: translate(-50%, -50%); }
.network-core span { font-size: .62rem; text-transform: uppercase; }
.network-core strong { font-size: 1.7rem; letter-spacing: -.05em; }
.not-list { padding: 22px 24px 24px; border-top: 1px solid #1c3f6d; }
.not-list p { margin: 0 0 12px; color: #8fa8c9; font: .65rem var(--mono); text-transform: uppercase; letter-spacing: .08em; }
.not-list ul { display: grid; grid-template-columns: 1fr 1fr; gap: 7px 18px; margin: 0 0 18px; padding: 0; color: #adc3df; list-style: none; font-size: .75rem; }
.not-list li::before { content: "×"; margin-right: 7px; color: #e9a29b; }
.not-list strong { display: block; padding-top: 15px; color: #dceaff; border-top: 1px solid #1c3f6d; font-size: .78rem; }

.problem-section { background: var(--white); }
.problem-heading { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(300px, .65fr); gap: clamp(50px, 9vw, 130px); align-items: end; }
.problem-heading h2 { max-width: 760px; }
.problem-summary { margin: 0 0 4px; color: var(--muted); font-size: 1.05rem; }
.problem-distinction { display: grid; grid-template-columns: 1fr 1fr; margin-top: 64px; border-block: 1px solid var(--line); }
.problem-distinction p { margin: 0; padding: 24px 28px 24px 0; color: var(--muted); }
.problem-distinction p + p { padding-left: 28px; border-left: 1px solid var(--line); }
.problem-distinction strong { color: var(--ink); }
.problem-context { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(50px, 9vw, 130px); padding: 70px 0; }
.problem-context > div > p { margin: 0 0 18px; color: var(--muted); }
.format-list { display: flex; flex-wrap: wrap; gap: 9px; margin: 0; padding: 0; list-style: none; }
.format-list li { padding: 8px 11px; color: var(--ink); background: var(--paper); border: 1px solid var(--line); font: .73rem/1.4 var(--mono); }
.problem-result { align-self: center; max-width: 550px; margin: 0; color: var(--muted); font-size: 1.2rem; }
.problem-result strong { color: var(--green-dark); }
.problem-cards { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.problem-card { min-height: 280px; padding: 26px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.problem-card > span { color: var(--green); font: .7rem var(--mono); }
.problem-card h3 { margin: 52px 0 14px; font-size: 1.08rem; letter-spacing: -.02em; }
.problem-card p { margin: 0; color: var(--muted); font-size: .86rem; }
.compatibility-figure { margin: 84px 0 0; padding: 0; }
.compatibility-figure figcaption { display: flex; justify-content: space-between; gap: 30px; align-items: end; margin-bottom: 24px; }
.compatibility-figure figcaption span { color: var(--green); font: .7rem var(--mono); text-transform: uppercase; letter-spacing: .08em; }
.compatibility-figure figcaption strong { max-width: 560px; font-size: 1.25rem; text-align: right; }
.compatibility-diagram { padding: clamp(24px, 4vw, 48px); background: #07162f; border: 1px solid #1c3f6d; }
.source-systems { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
.source-systems div { display: grid; place-items: center; gap: 10px; min-height: 94px; padding: 12px; color: #c2d4ea; border: 1px solid #315f99; text-align: center; font: .68rem/1.35 var(--mono); }
.source-systems span { display: grid; place-items: center; width: 34px; height: 26px; color: #82b7ff; background: #122e56; border: 1px solid #315f99; font-size: .6rem; }
.exchange-lines { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; height: 64px; }
.exchange-lines span { position: relative; width: 1px; height: 100%; margin: auto; background: #2f72c9; }
.exchange-lines span::before, .exchange-lines span::after { content: ""; position: absolute; left: -3px; width: 7px; height: 7px; border-left: 1px solid #82b7ff; border-top: 1px solid #82b7ff; }
.exchange-lines span::before { top: 2px; transform: rotate(45deg); }
.exchange-lines span::after { bottom: 2px; transform: rotate(225deg); }
.shared-layer { display: grid; grid-template-columns: auto 1fr auto; gap: 20px; align-items: center; padding: 22px 24px; color: #dceaff; background: var(--green-dark); border: 1px solid #4b98ff; }
.shared-layer small { color: #82b7ff; font: .58rem var(--mono); letter-spacing: .06em; }
.shared-layer strong { font-size: 1rem; }
.shared-layer span { color: #afc7e6; font-size: .72rem; }
.problem-closing { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(50px, 9vw, 130px); margin-top: 84px; padding-top: 34px; border-top: 2px solid var(--green-dark); }
.problem-closing p { margin: 0; color: var(--muted); font-size: 1.05rem; }
.problem-closing strong { color: var(--ink); }

.vision-section { background: var(--paper); border-top: 1px solid var(--line); }
.vision-intro { display: grid; grid-template-columns: minmax(0, .9fr) minmax(360px, .8fr); gap: clamp(60px, 10vw, 150px); align-items: end; }
.vision-intro h2 { max-width: 680px; }
.vision-copy p { margin: 0; color: var(--muted); font-size: 1.05rem; }
.vision-copy p + p { margin-top: 18px; }
.vision-distinction { display: grid; grid-template-columns: 1fr 1fr; gap: 0; margin: 64px 0; color: var(--muted); border-block: 1px solid var(--line); }
.vision-distinction span, .vision-distinction strong { padding: 22px 26px 22px 0; }
.vision-distinction strong { padding-left: 26px; color: var(--green-dark); border-left: 1px solid var(--line); font-weight: 650; }
.principle-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.principle-card { position: relative; min-height: 310px; padding: 28px; background: rgba(255,255,255,.48); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.principle-card:hover { background: var(--white); }
.principle-icon { display: grid; place-items: center; width: 46px; height: 46px; color: var(--green-dark); border: 1px solid var(--line); font: 700 .78rem var(--mono); }
.principle-number { position: absolute; top: 30px; right: 28px; margin: 0; color: var(--green); font: .68rem var(--mono); }
.principle-card h3 { margin: 48px 0 14px; font-size: 1.12rem; letter-spacing: -.025em; }
.principle-card > p:last-child { margin: 0; color: var(--muted); font-size: .85rem; }
.vision-figure { margin: 90px 0 0; }
.vision-figure figcaption { display: flex; justify-content: space-between; align-items: end; gap: 30px; margin-bottom: 24px; }
.vision-figure figcaption span { color: var(--green); font: .7rem var(--mono); text-transform: uppercase; letter-spacing: .08em; }
.vision-figure figcaption strong { font-size: 1.25rem; }
.vision-flow { overflow: hidden; padding: clamp(28px, 4vw, 48px); background: var(--white); border: 1px solid var(--line); }
.vision-domain-row, .vision-consumer-row { display: grid; gap: 10px; }
.vision-domain-row { grid-template-columns: repeat(5, 1fr); }
.vision-consumer-row { grid-template-columns: repeat(6, 1fr); }
.vision-domain-row span, .vision-consumer-row span { display: grid; place-items: center; min-height: 58px; padding: 9px; color: var(--muted); background: var(--paper); border: 1px solid var(--line); text-align: center; font: .68rem/1.35 var(--mono); }
.vision-flow-lines { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; height: 52px; }
.vision-flow-lines-six { grid-template-columns: repeat(6, 1fr); }
.vision-flow-lines i { position: relative; width: 1px; height: 100%; margin: auto; background: var(--line); }
.vision-flow-lines i::after { content: ""; position: absolute; bottom: 1px; left: -3px; width: 6px; height: 6px; border-right: 1px solid var(--green); border-bottom: 1px solid var(--green); transform: rotate(45deg); }
.vision-spec-layer { display: grid; grid-template-columns: auto 1fr auto; gap: 24px; align-items: center; padding: 22px 26px; color: var(--white); background: var(--green-dark); }
.vision-spec-layer small { color: #82b7ff; font: .58rem var(--mono); letter-spacing: .06em; }
.vision-spec-layer strong { font-size: 1rem; text-align: center; }
.vision-spec-layer span { color: #afc9ea; font-size: .72rem; }
.vision-closing { display: grid; grid-template-columns: auto auto auto 1fr; align-items: center; gap: 18px 32px; margin-top: 72px; padding-top: 30px; border-top: 2px solid var(--green-dark); }
.vision-closing p { margin: 0; color: var(--muted); font: .8rem var(--mono); }
.vision-closing strong { color: var(--green-dark); }
.vision-closing > span { justify-self: end; max-width: 470px; color: var(--muted); text-align: right; }

.how-section { background: var(--white); }
.how-intro { display: grid; grid-template-columns: minmax(0, .85fr) minmax(380px, .85fr); gap: clamp(60px, 10vw, 150px); align-items: start; }
.how-copy p { margin: 0; color: var(--muted); font-size: 1.05rem; }
.how-copy p + p { margin-top: 16px; }
.how-copy strong { color: var(--ink); }
.how-copy .how-boundary { margin-top: 26px; padding: 18px 0; color: var(--green-dark); border-block: 1px solid var(--line); font-size: .9rem; }
.workflow { display: grid; grid-template-columns: repeat(4, 1fr); margin: 76px 0 0; padding: 0; list-style: none; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.workflow-step { position: relative; min-height: 405px; padding: 26px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.workflow-step:not(:last-child)::after { content: "→"; position: absolute; top: 38px; right: -10px; z-index: 2; display: grid; place-items: center; width: 20px; height: 20px; color: var(--green); background: var(--white); font: .8rem var(--mono); }
.workflow-marker { display: grid; place-items: center; width: 42px; height: 42px; color: var(--green-dark); background: var(--green-soft); border: 1px solid #b7cef0; border-radius: 50%; font: 700 .78rem var(--mono); }
.workflow-step h3 { margin: 42px 0 14px; font-size: 1.25rem; }
.workflow-step > p { margin: 0 0 18px; color: var(--muted); font-size: .88rem; }
.workflow-step > strong { display: block; color: var(--ink); font-size: .76rem; line-height: 1.55; }
.document-fields { display: flex; flex-wrap: wrap; gap: 5px; margin: 20px 0 0; padding: 0; list-style: none; }
.document-fields li { padding: 4px 6px; color: var(--green-dark); background: var(--paper); border: 1px solid var(--line); font: .58rem var(--mono); }
.how-principles { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 32px; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.how-principles span { position: relative; padding: 17px 20px 17px 40px; color: var(--muted); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); font-size: .78rem; }
.how-principles span::before { content: "✓"; position: absolute; left: 18px; color: var(--green); font: .7rem var(--mono); }
.architecture-figure { margin: 90px 0 0; }
.architecture-figure figcaption { display: flex; justify-content: space-between; align-items: end; gap: 30px; margin-bottom: 24px; }
.architecture-figure figcaption span { color: var(--green); font: .7rem var(--mono); text-transform: uppercase; letter-spacing: .08em; }
.architecture-figure figcaption strong { font-size: 1.25rem; }
.architecture-diagram { display: grid; justify-items: center; padding: clamp(30px, 5vw, 58px); color: #c8dbf2; background: #07162f; border: 1px solid #1c3f6d; }
.architecture-source { display: grid; gap: 5px; min-width: 250px; padding: 16px 24px; border: 1px solid #315f99; text-align: center; font: .76rem var(--mono); }
.architecture-source small { color: #8ca6c8; font-size: .6rem; }
.architecture-arrow { height: 46px; color: #4b98ff; font: 1rem/46px var(--mono); }
.architecture-document { display: grid; gap: 7px; min-width: min(520px, 100%); padding: 20px 26px; color: var(--white); background: var(--green-dark); border: 1px solid #4b98ff; text-align: center; }
.architecture-document small, .optional-path small { color: #82b7ff; font: .56rem var(--mono); letter-spacing: .07em; }
.architecture-branches { position: relative; display: grid; grid-template-columns: repeat(3, 1fr); width: min(730px, 82%); height: 64px; border-top: 1px solid transparent; }
.architecture-branches::before { content: ""; position: absolute; top: 28px; left: 16.666%; right: 16.666%; height: 1px; background: #2f72c9; }
.architecture-branches i { position: relative; width: 1px; height: 36px; margin: 28px auto 0; background: #2f72c9; }
.architecture-branches i:first-child::before { content: ""; position: absolute; top: -28px; left: 0; width: 1px; height: 28px; background: #2f72c9; }
.architecture-actions { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; width: min(800px, 100%); }
.architecture-actions div { display: grid; gap: 6px; min-height: 92px; padding: 16px; border: 1px solid #315f99; text-align: center; }
.architecture-actions strong { color: #dceaff; font-size: .82rem; }
.architecture-actions span { color: #8ca6c8; font-size: .66rem; }
.optional-path { display: grid; justify-items: center; width: min(800px, 100%); }
.optional-line { height: 50px; color: #4b98ff; font: 1rem/50px var(--mono); }
.optional-path > div { display: grid; grid-template-columns: auto auto 1fr; gap: 18px; align-items: center; width: 72%; padding: 16px 20px; color: #adc3df; background: #0c2448; border: 1px dashed #3d6fa8; }
.optional-path > div strong { color: #dceaff; font-size: .78rem; }
.optional-path > div span { color: #8ca6c8; font-size: .65rem; text-align: right; }
.how-closing { display: grid; grid-template-columns: 1fr auto; gap: clamp(50px, 8vw, 110px); align-items: end; margin-top: 74px; padding-top: 30px; border-top: 2px solid var(--green-dark); }
.how-closing > p { max-width: 670px; margin: 0; color: var(--muted); font-size: 1.05rem; }
.how-closing > div { display: grid; gap: 4px; color: var(--muted); font: .76rem var(--mono); text-align: right; }
.how-closing strong { color: var(--green-dark); }

.section-grid { display: grid; grid-template-columns: minmax(280px, .9fr) minmax(0, 1.1fr); gap: clamp(60px, 10vw, 150px); }
.section-body { padding-top: 42px; }
.section-body > p:first-child { max-width: 670px; margin: 0 0 34px; color: var(--muted); font-size: 1.2rem; }
.placeholder-note { margin-top: 34px; padding: 16px 0; color: var(--muted); border-block: 1px solid var(--line); font: .75rem/1.5 var(--mono); }
.placeholder-note-dark { color: #adc3df; border-color: rgba(255,255,255,.2); }
.placeholder-note a { color: inherit; font-weight: 700; text-underline-offset: 3px; }
.steps { display: grid; gap: 0; margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.steps li { display: grid; grid-template-columns: 52px 140px 1fr; align-items: baseline; gap: 18px; padding: 24px 0; border-bottom: 1px solid var(--line); }
.steps span { color: var(--green); font: .75rem var(--mono); }
.steps p { margin: 0; color: var(--muted); }
.specification { color: var(--white); background: var(--green-dark); }
.specification .section-index, .specification .text-link { color: #82b7ff; }
.specification .section-body > p:first-child { color: #c5d8f2; }
.document-row { display: flex; justify-content: space-between; align-items: end; gap: 24px; padding-top: 28px; border-top: 1px solid rgba(255,255,255,.2); }
.document-row span { display: grid; gap: 4px; }
.document-row small { color: #95aed0; font: .68rem var(--mono); text-transform: uppercase; }
.tag-list { display: flex; flex-wrap: wrap; gap: 10px; }
.tag-list > span { padding: 10px 14px; border: 1px solid var(--line); background: var(--white); font: .82rem var(--mono); }
.tag-list .placeholder-note { width: 100%; }
.resource-grid { display: grid; grid-template-columns: 1fr 1fr; padding-top: 0; border-top: 1px solid var(--line); }
.resource-grid a { display: grid; gap: 10px; min-height: 150px; padding: 26px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); text-decoration: none; }
.resource-grid a:nth-child(even) { border-right: 0; }
.resource-grid a:hover { background: var(--white); }
.resource-grid span { color: var(--muted); font-size: .85rem; }
.governance-principles { display: grid; grid-template-columns: 1fr 1fr; margin: 0 0 34px; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.governance-principles article { min-height: 210px; padding: 24px; background: rgba(255,255,255,.48); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.governance-principles article > span, .participation-paths article > span { color: var(--green); font: 700 .67rem var(--mono); text-transform: uppercase; letter-spacing: .08em; }
.governance-principles h3, .participation-paths h3 { margin: 28px 0 10px; font-size: 1rem; letter-spacing: -.02em; }
.governance-principles p, .participation-paths p { margin: 0; color: var(--muted); font-size: .82rem; }
.governance-process { margin-bottom: 26px; padding: 24px 0; border-block: 1px solid var(--line); }
.governance-process > p { margin: 0 0 18px; color: var(--muted); font-size: .85rem; }
.governance-process ol { display: grid; grid-template-columns: repeat(6, 1fr); margin: 0; padding: 0; list-style: none; }
.governance-process li { position: relative; color: var(--green-dark); font: 700 .66rem var(--mono); text-align: center; }
.governance-process li:not(:last-child)::after { content: "→"; position: absolute; right: -5px; color: var(--green); }
.participation-paths { display: grid; grid-template-columns: repeat(3, 1fr); margin: 48px 0 38px; text-align: left; border-top: 1px solid rgba(255,255,255,.2); border-left: 1px solid rgba(255,255,255,.2); }
.participation-paths article { min-height: 220px; padding: 26px; border-right: 1px solid rgba(255,255,255,.2); border-bottom: 1px solid rgba(255,255,255,.2); }
.participation-paths article > span { color: #82b7ff; }
.participation-paths h3 { color: var(--white); }
.participation-paths p { color: #c5d8f2; }
.join { color: var(--white); background: var(--green-dark); }
.join-inner { max-width: 880px; margin-inline: auto; text-align: center; }
.join .section-index { color: #82b7ff; }
.join h2 { max-width: 800px; margin-inline: auto; }
.join > .join-inner > p:not(.section-index) { margin: 24px auto 34px; color: #c5d8f2; font-size: 1.1rem; }
.join .actions { justify-content: center; }
.join-actions { margin-top: 6px; }
.footer { padding: 54px 0; border-top: 1px solid var(--line); }
.footer-grid { display: grid; grid-template-columns: 1fr 1fr auto; gap: 50px; align-items: start; }
.footer strong, .footer span { font-size: .85rem; font-weight: 700; }
.footer p { max-width: 460px; margin: 8px 0 0; color: var(--muted); font-size: .8rem; }
.footer .copyright { white-space: nowrap; }

@media (max-width: 900px) {
  .nav { gap: 16px; }
  .nav-links { order: 3; width: 100%; overflow-x: auto; padding: 11px 0; border-top: 1px solid var(--line); }
  .nav { flex-wrap: wrap; padding-top: 12px; }
  .hero { min-height: auto; background: var(--paper); }
  .hero-grid, .section-grid { grid-template-columns: 1fr; gap: 42px; }
  .problem-heading { grid-template-columns: 1fr; gap: 32px; }
  .vision-intro { grid-template-columns: 1fr; gap: 34px; }
  .principle-grid { grid-template-columns: 1fr 1fr; }
  .vision-flow { overflow-x: auto; }
  .vision-domain-row, .vision-flow-lines:not(.vision-flow-lines-six) { grid-template-columns: repeat(5, minmax(115px, 1fr)); min-width: 615px; }
  .vision-consumer-row, .vision-flow-lines-six { grid-template-columns: repeat(6, minmax(105px, 1fr)); min-width: 680px; }
  .vision-spec-layer { min-width: 680px; }
  .vision-closing { grid-template-columns: auto auto auto; }
  .vision-closing > span { grid-column: 1 / -1; justify-self: start; text-align: left; }
  .how-intro { grid-template-columns: 1fr; gap: 34px; }
  .workflow { grid-template-columns: 1fr 1fr; }
  .workflow-step:nth-child(2)::after { display: none; }
  .how-principles { grid-template-columns: 1fr 1fr; }
  .problem-cards { grid-template-columns: 1fr 1fr; }
  .source-systems { grid-template-columns: repeat(5, minmax(115px, 1fr)); overflow-x: auto; padding-bottom: 10px; }
  .exchange-lines { grid-template-columns: repeat(5, minmax(115px, 1fr)); overflow: hidden; }
  .shared-layer { grid-template-columns: 1fr; gap: 7px; text-align: center; }
  .section-body { padding-top: 0; }
  .ecosystem-panel { max-width: 620px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer .copyright { grid-column: 1 / -1; }
}

@media (max-width: 620px) {
  :root { --shell: min(100% - 28px, 1180px); }
  .site-header .button-small { display: none; }
  .section { padding: 78px 0; }
  .hero { padding-block: 58px 78px; }
  h1 { font-size: clamp(3rem, 15vw, 4.6rem); }
  .definition p { grid-template-columns: 1fr; gap: 2px; }
  .value-line span:not(:last-child)::after { content: ""; margin: 0; }
  .ecosystem-diagram { min-height: 340px; }
  .network-ring-outer { width: 250px; height: 250px; }
  .network-ring-inner { width: 164px; height: 164px; }
  .connector-north, .connector-south { height: 90px; }
  .connector-east, .connector-west { width: 80px; }
  .network-node { width: 82px; }
  .node-right { right: 10px; }
  .node-left { left: 10px; }
  .not-list ul { grid-template-columns: 1fr; }
  .problem-distinction, .problem-context, .problem-closing { grid-template-columns: 1fr; }
  .problem-distinction p + p { padding-left: 0; border-left: 0; border-top: 1px solid var(--line); }
  .problem-distinction p { padding: 18px 0; }
  .problem-context { gap: 38px; padding-block: 54px; }
  .problem-cards { grid-template-columns: 1fr; }
  .problem-card { min-height: auto; }
  .problem-card h3 { margin-top: 30px; }
  .compatibility-figure figcaption { align-items: start; flex-direction: column; }
  .compatibility-figure figcaption strong { text-align: left; }
  .compatibility-diagram { overflow-x: auto; }
  .source-systems, .exchange-lines, .shared-layer { min-width: 660px; }
  .shared-layer { grid-template-columns: auto 1fr auto; text-align: left; }
  .problem-closing { gap: 24px; margin-top: 64px; }
  .governance-principles, .participation-paths { grid-template-columns: 1fr; }
  .governance-process ol { grid-template-columns: repeat(3, 1fr); gap: 18px 0; }
  .vision-distinction { grid-template-columns: 1fr; }
  .vision-distinction span, .vision-distinction strong { padding: 18px 0; }
  .vision-distinction strong { border-top: 1px solid var(--line); border-left: 0; }
  .principle-grid { grid-template-columns: 1fr; }
  .principle-card { min-height: auto; }
  .principle-card h3 { margin-top: 34px; }
  .vision-figure figcaption { align-items: start; flex-direction: column; }
  .vision-spec-layer { grid-template-columns: auto 1fr auto; }
  .vision-closing { grid-template-columns: 1fr; gap: 9px; }
  .vision-closing > span { grid-column: auto; margin-top: 12px; }
  .workflow { grid-template-columns: 1fr; }
  .workflow-step { min-height: auto; }
  .workflow-step:not(:last-child)::after { top: auto; right: auto; bottom: -10px; left: 37px; transform: rotate(90deg); }
  .workflow-step:nth-child(2)::after { display: grid; }
  .workflow-step h3 { margin-top: 28px; }
  .how-principles { grid-template-columns: 1fr; }
  .architecture-figure figcaption { align-items: start; flex-direction: column; }
  .architecture-diagram { overflow-x: auto; justify-items: start; }
  .architecture-source, .architecture-document, .architecture-branches, .architecture-actions, .optional-path { min-width: 660px; }
  .architecture-source { justify-self: start; }
  .optional-path > div { width: 82%; }
  .how-closing { grid-template-columns: 1fr; gap: 24px; }
  .how-closing > div { text-align: left; }
  .steps li { grid-template-columns: 40px 1fr; }
  .steps p { grid-column: 2; }
  .document-row { align-items: start; flex-direction: column; }
  .resource-grid { grid-template-columns: 1fr; }
  .resource-grid a { border-right: 0; }
  .footer-grid { grid-template-columns: 1fr; }
}

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