/* AVBG Free — clinical editorial system v55.0.7 */
:root {
  --navy-950: #060816;
  --navy-900: #0b1020;
  --navy-850: #10172b;
  --navy-800: #151e35;
  --navy-700: #1c2947;
  --border: #34446e;
  --border-soft: #202d4d;
  --ink-100: #f5f7ff;
  --ink-300: #cad2e8;
  --ink-500: #8f9bb8;
  --ink-600: #6f7b99;
  --emerald: #5f82ff;
  --emerald-bright: #7c8dff;
  --emerald-dim: rgba(95, 130, 255, .14);
  --clinical-blue: #8ec5ff;
  --brand-red: #ef3340;
  --brand-violet: #7454e8;
  --amber: #f1b35a;
  --amber-dim: rgba(241, 179, 90, .1);
  --danger: #ff7f78;
  --font-ui: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-data: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --font-ar: "Segoe UI", Tahoma, "Noto Sans Arabic", Arial, sans-serif;
  --content-max: 1220px;
  --article-max: 760px;
  --sp-1: 8px;
  --sp-2: 16px;
  --sp-3: 24px;
  --sp-4: 32px;
  --sp-5: 40px;
  --sp-6: 48px;
  --sp-8: 64px;
  --sp-10: 80px;
  --sp-12: 96px;
  --radius: 8px;
  --radius-sm: 5px;
  --ease: cubic-bezier(.2, .8, .2, 1);
  --dur: 180ms;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--navy-900);
  color: var(--ink-300);
  font-family: var(--font-ui);
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
::selection { background: var(--emerald-bright); color: var(--navy-950); }
a, button, input, [tabindex] { outline-offset: 3px; }
a:focus-visible, button:focus-visible, [tabindex]:focus-visible { outline: 2px solid var(--emerald-bright); border-radius: 3px; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
}

.skip-link { position: absolute; z-index: 1000; left: 12px; top: -60px; padding: 10px 16px; background: var(--emerald-bright); color: var(--navy-950); font-weight: 800; text-decoration: none; transition: top var(--dur) var(--ease); }
.skip-link:focus { top: 12px; }
.wrap { width: min(100% - 40px, var(--content-max)); margin-inline: auto; }
.article { width: min(100% - 40px, var(--article-max)); margin-inline: auto; }

h1, h2, h3, h4 { margin: 0; color: var(--ink-100); line-height: 1.08; letter-spacing: -.035em; }
h1 { font-size: clamp(3rem, 7.2vw, 6.4rem); font-weight: 730; }
h2 { font-size: clamp(2rem, 4.3vw, 4.1rem); font-weight: 700; }
h3 { font-size: 1.1rem; font-weight: 720; letter-spacing: -.015em; }
p { margin: 0 0 15px; }
ul, ol { margin: 0 0 15px; padding-left: 22px; }
li { margin-bottom: 6px; }
a { color: var(--clinical-blue); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--emerald-bright); }
strong { color: var(--ink-100); }

.eyebrow, .section-index, .release-line, .closing-code {
  font-family: var(--font-data);
  text-transform: uppercase;
  letter-spacing: .12em;
  font-size: .7rem;
  font-weight: 700;
}
.eyebrow { display: inline-block; margin-bottom: 14px; color: var(--emerald-bright); }
.section-index { color: var(--ink-600); padding-top: 8px; }
.section-head { max-width: 690px; margin-bottom: var(--sp-4); }
.section-head p { color: var(--ink-500); font-size: 1.02rem; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-height: 46px;
  padding: 0 21px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font: 750 .91rem/1 var(--font-ui);
  text-decoration: none;
  cursor: pointer;
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn-primary { background: var(--brand-violet); color: #fff; }
.btn-primary:hover { background: #866bf0; color: #fff; }
.btn-secondary { background: transparent; border-color: var(--border); color: var(--ink-100); }
.btn-secondary:hover { border-color: var(--emerald-bright); color: var(--emerald-bright); }
.btn-block { width: 100%; }
.btn-large { min-height: 58px; padding-inline: 28px; font-size: 1rem; }
.cta-row { display: flex; align-items: center; flex-wrap: wrap; gap: 18px; }
.text-link { color: var(--ink-300); font-weight: 700; text-decoration: none; }
.text-link:hover { color: var(--emerald-bright); }
.microcopy { margin-top: 16px; color: var(--ink-500); font-size: .82rem; }
.icon { width: 22px; height: 22px; stroke: currentColor; fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; flex: 0 0 auto; }

/* Navigation */
.site-header { position: sticky; top: 0; z-index: 100; background: rgba(11, 16, 32, .95); border-bottom: 1px solid var(--border-soft); backdrop-filter: blur(12px); }
.site-header .wrap { min-height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.brand { display: inline-flex; align-items: center; gap: 11px; color: var(--ink-100); font-weight: 800; text-decoration: none; flex: 0 0 auto; }
.brand-logo { width: 36px; height: 36px; display: block; border-radius: 8px; box-shadow: 0 0 0 1px rgba(255,255,255,.09); }
.brand-words { font-size: 1rem; letter-spacing: -.02em; }
.brand .mark { color: var(--emerald-bright); font-weight: 650; }
nav.site-nav ul { list-style: none; display: flex; gap: clamp(16px, 2.4vw, 30px); margin: 0; padding: 0; }
nav.site-nav a { color: var(--ink-500); font-size: .83rem; font-weight: 700; text-decoration: none; }
nav.site-nav a:hover, nav.site-nav a[aria-current="page"] { color: var(--ink-100); }
.nav-actions { display: flex; align-items: center; gap: 15px; }
.nav-pro { color: var(--ink-500); font-size: .78rem; font-weight: 800; text-transform: uppercase; letter-spacing: .08em; text-decoration: none; }
.nav-toggle { display: none; width: 44px; height: 44px; align-items: center; justify-content: center; border: 1px solid var(--border); background: transparent; color: var(--ink-100); }
.nav-toggle svg { width: 20px; height: 20px; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; }
.nav-toggle .icon-close { display: none; }
.nav-toggle[aria-expanded="true"] .icon-open { display: none; }
.nav-toggle[aria-expanded="true"] .icon-close { display: block; }
.mobile-panel { display: none; background: var(--navy-850); border-bottom: 1px solid var(--border); }
.mobile-panel ul { list-style: none; margin: 0; padding: 12px 0 18px; }
.mobile-panel a { display: block; min-height: 44px; padding: 10px 4px; color: var(--ink-300); font-weight: 700; text-decoration: none; border-bottom: 1px solid var(--border-soft); }
.mobile-panel a:hover, .mobile-panel a[aria-current="page"] { color: var(--emerald-bright); }

/* Home hero */
.clinical-grid-bg { background-image: linear-gradient(rgba(124, 141, 255, .035) 1px, transparent 1px), linear-gradient(90deg, rgba(124, 141, 255, .035) 1px, transparent 1px); background-size: 48px 48px; background-position: center; }
.hero { position: relative; min-height: 720px; display: grid; align-items: center; padding: 78px 0 88px; border-bottom: 1px solid var(--border-soft); overflow: hidden; }
.hero::before { content: ""; position: absolute; width: 360px; height: 360px; right: -160px; top: 80px; border: 1px solid rgba(116,84,232,.2); border-radius: 50%; box-shadow: 0 0 0 70px rgba(95,130,255,.025), 0 0 0 140px rgba(239,51,64,.012); pointer-events: none; }
.hero-layout { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(430px, .95fr); gap: clamp(46px, 7vw, 96px); align-items: center; }
.release-line { display: flex; align-items: center; gap: 10px; color: var(--ink-500); margin-bottom: 24px; }
.release-line span:last-child { margin-left: 8px; color: var(--ink-600); }
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--brand-red); box-shadow: 0 0 0 4px rgba(239,51,64,.12); }
.hero h1 { max-width: 10ch; }
.hero h1 em { color: #8f83ff; font-style: normal; font-weight: 560; }
.hero-lede { max-width: 59ch; margin: 30px 0 32px; color: var(--ink-300); font-size: clamp(1.04rem, 1.6vw, 1.28rem); line-height: 1.65; }
.hero-proof { display: flex; flex-wrap: wrap; gap: 8px 22px; list-style: none; padding: 28px 0 0; margin: 0; color: var(--ink-500); font: 650 .75rem/1.3 var(--font-data); text-transform: uppercase; letter-spacing: .04em; }
.hero-proof li { position: relative; margin: 0; padding-left: 12px; }
.hero-proof li::before { content: ""; position: absolute; left: 0; top: .48em; width: 4px; height: 4px; background: var(--emerald); }

.acid-base-board { position: relative; background: var(--navy-950); border: 1px solid var(--border); box-shadow: 16px 16px 0 rgba(116,84,232,.08); }
.acid-base-board::before { content: ""; position: absolute; inset: -7px 7px 7px -7px; border: 1px solid rgba(239,51,64,.18); pointer-events: none; }
.board-topline { height: 46px; display: flex; align-items: center; justify-content: space-between; padding: 0 18px; border-bottom: 1px solid var(--border); color: var(--ink-600); font: 700 .64rem/1 var(--font-data); letter-spacing: .09em; }
.live-state { display: inline-flex; align-items: center; gap: 7px; color: var(--clinical-blue); }
.live-state i { width: 6px; height: 6px; border-radius: 50%; background: var(--brand-red); }
.board-values { display: grid; grid-template-columns: repeat(3, 1fr); }
.board-values > div { min-width: 0; padding: 22px 18px 18px; border-right: 1px solid var(--border-soft); }
.board-values > div:last-child { border-right: 0; }
.board-values span, .board-values small { display: block; font: 700 .62rem/1.2 var(--font-data); color: var(--ink-600); letter-spacing: .08em; }
.board-values strong { display: block; margin: 8px 0 6px; color: var(--ink-100); font: 500 clamp(1.7rem, 3vw, 2.6rem)/1 var(--font-data); letter-spacing: -.06em; }
.board-values small { color: var(--clinical-blue); }
.ph-position { padding: 20px; border-top: 1px solid var(--border-soft); border-bottom: 1px solid var(--border-soft); background: #090d1b; }
.ph-scale-labels { display: flex; justify-content: space-between; margin-bottom: 12px; color: var(--ink-600); font: 700 .57rem/1 var(--font-data); letter-spacing: .08em; }
.ph-scale { position: relative; height: 8px; margin: 0 7px 24px; background: linear-gradient(90deg, rgba(239,51,64,.86), #6758c8 48%, #4e86de); }
.ph-scale::before { content: ""; position: absolute; inset: -4px 50% -4px auto; width: 1px; background: rgba(255,255,255,.45); }
.ph-scale i { position: absolute; top: 50%; width: 16px; height: 16px; border: 3px solid #fff; border-radius: 50%; background: var(--brand-red); transform: translate(-50%,-50%); box-shadow: 0 0 0 4px rgba(239,51,64,.18); }
.ph-scale b { position: absolute; top: 19px; transform: translateX(-50%); color: #fff; font: 700 .67rem/1 var(--font-data); white-space: nowrap; }
.driver-grid { display: grid; grid-template-columns: 1fr 1fr; }
.driver-card { padding: 18px 20px; border-bottom: 1px solid var(--border-soft); }
.driver-card + .driver-card { border-left: 1px solid var(--border-soft); }
.driver-card > span, .calculation-verdict span { display: block; color: var(--ink-600); font: 700 .58rem/1.2 var(--font-data); letter-spacing: .08em; }
.driver-card > strong { display: block; margin: 8px 0 10px; color: var(--ink-100); font: 700 .9rem/1.2 var(--font-data); }
.driver-track { height: 4px; background: var(--navy-700); }
.driver-track i { display: block; height: 100%; background: var(--clinical-blue); }
.driver-card.metabolic .driver-track i { background: var(--brand-red); }
.driver-card small { display: block; margin-top: 8px; color: var(--ink-600); font-size: .67rem; }
.calculation-verdict { display: grid; grid-template-columns: .72fr .55fr 1.25fr; }
.calculation-verdict > div { padding: 17px 18px; border-right: 1px solid var(--border-soft); border-bottom: 1px solid var(--border-soft); }
.calculation-verdict > div:last-child { border-right: 0; }
.calculation-verdict strong { display: block; margin: 7px 0 4px; color: var(--ink-100); font: 700 .89rem/1.2 var(--font-data); }
.calculation-verdict small { color: var(--ink-600); font-size: .66rem; }
.calculation-verdict .verdict-main strong { color: #8f83ff; font-family: var(--font-ui); }
.identity-channel { display: grid; grid-template-columns: 1fr auto; gap: 5px 15px; align-items: center; padding: 15px 20px; background: rgba(95,130,255,.07); }
.identity-channel span { color: var(--ink-600); font: 700 .61rem/1 var(--font-data); letter-spacing: .09em; }
.identity-channel strong { grid-row: 1 / span 2; grid-column: 2; color: var(--emerald-bright); font: 700 .69rem/1 var(--font-data); letter-spacing: .06em; }
.identity-channel small { color: var(--ink-500); font-size: .72rem; }

.proof-rail { background: var(--navy-950); border-bottom: 1px solid var(--border-soft); }
.proof-rail .wrap { display: grid; grid-template-columns: repeat(4, 1fr); }
.proof-rail .wrap > div { min-height: 86px; display: flex; align-items: center; gap: 14px; padding: 16px 24px; border-right: 1px solid var(--border-soft); }
.proof-rail .wrap > div:first-child { border-left: 1px solid var(--border-soft); }
.proof-rail b { color: var(--emerald-bright); font: 700 .66rem/1 var(--font-data); }
.proof-rail span { color: var(--ink-300); font-size: .86rem; font-weight: 700; }

/* Editorial sections */
.editorial-section { padding: clamp(76px, 10vw, 132px) 0; border-bottom: 1px solid var(--border-soft); }
.editorial-grid { display: grid; grid-template-columns: 150px minmax(260px, .72fr) minmax(480px, 1.28fr); gap: clamp(28px, 5vw, 72px); align-items: start; }
.section-intro h2 { font-size: clamp(2.2rem, 4vw, 3.8rem); max-width: 13ch; }
.section-intro p { color: var(--ink-500); font-size: 1rem; }
.section-intro h2 + p { margin-top: 25px; }

.boundary-panel { border: 1px solid var(--border); background: var(--navy-850); }
.boundary-col { padding: 28px 30px; }
.boundary-col + .boundary-col { border-top: 1px solid var(--border); }
.boundary-head { display: grid; grid-template-columns: 1fr auto; align-items: baseline; gap: 15px; margin-bottom: 18px; }
.boundary-head span { color: var(--ink-600); font: 700 .63rem/1 var(--font-data); letter-spacing: .1em; }
.boundary-head b { color: var(--ink-100); font-size: .92rem; }
.boundary-col ul { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 10px 22px; }
.boundary-col li { position: relative; padding-left: 15px; margin: 0; color: var(--ink-300); font-size: .86rem; }
.boundary-col li::before { position: absolute; left: 0; color: var(--emerald-bright); font-family: var(--font-data); }
.included li::before { content: "+"; }
.excluded li::before { content: "–"; color: var(--danger); }
.boundary-cut { display: flex; align-items: center; gap: 14px; padding: 0 30px; color: var(--danger); font: 700 .59rem/1 var(--font-data); letter-spacing: .12em; }
.boundary-cut::before, .boundary-cut::after { content: ""; height: 1px; flex: 1; background: rgba(255,127,120,.24); }

.engine-section { background: var(--navy-850); }
.capability-ledger { border-top: 1px solid var(--border); }
.capability-ledger article { display: grid; grid-template-columns: 34px 1fr auto; gap: 18px; align-items: start; padding: 22px 6px; border-bottom: 1px solid var(--border-soft); }
.capability-ledger article > span { color: var(--ink-600); font: 700 .68rem/1.3 var(--font-data); }
.capability-ledger h3 { margin-bottom: 6px; }
.capability-ledger p { margin: 0; color: var(--ink-500); font-size: .86rem; }
.capability-ledger article > b { color: var(--emerald); font: 700 .62rem/1.3 var(--font-data); letter-spacing: .08em; }

.edition-section { background: var(--navy-950); }
.edition-heading { display: grid; grid-template-columns: 1.3fr .7fr; gap: 70px; align-items: end; margin: 28px 0 54px 150px; }
.edition-heading h2 { font-size: clamp(2.3rem, 4.7vw, 4.5rem); }
.edition-heading > p { color: var(--ink-500); font-size: 1rem; }
.edition-table { border: 1px solid var(--border); }
.edition-row { display: grid; grid-template-columns: .68fr 1fr 1.18fr; border-bottom: 1px solid var(--border-soft); }
.edition-row:last-child { border-bottom: 0; }
.edition-row > div { padding: 17px 20px; border-right: 1px solid var(--border-soft); font-size: .87rem; }
.edition-row > div:last-child { border-right: 0; }
.edition-row > div:first-child { color: var(--ink-500); font-weight: 750; }
.edition-table-head { background: var(--navy-800); }
.edition-table-head > div { color: var(--ink-100) !important; font: 700 .72rem/1.3 var(--font-ui); text-transform: uppercase; letter-spacing: .05em; }
.edition-tag { display: inline-block; margin-right: 8px; padding: 3px 6px; font: 800 .58rem/1 var(--font-data); }
.free-tag { background: var(--emerald-bright); color: var(--navy-950); }
.pro-tag { background: var(--clinical-blue); color: var(--navy-950); }
.edition-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.edition-actions > span { margin-left: auto; color: var(--ink-500); font-size: .82rem; }

.privacy-flow-section { background: var(--navy-900); }
.data-flow { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr; align-items: center; margin-top: 9px; }
.flow-node { min-height: 136px; padding: 20px; display: flex; flex-direction: column; justify-content: space-between; border: 1px solid var(--border); background: var(--navy-850); }
.flow-node span { color: var(--emerald); font: 700 .65rem/1 var(--font-data); }
.flow-node b { color: var(--ink-100); font-size: .9rem; }
.flow-node small { color: var(--ink-600); font-size: .73rem; }
.flow-arrow { padding: 0 9px; color: var(--emerald-bright); font-family: var(--font-data); }
.privacy-fineprint { grid-column: 3; margin-top: 22px; padding-left: 18px; border-left: 2px solid var(--emerald); }
.privacy-fineprint p { color: var(--ink-500); font-size: .84rem; }
.privacy-fineprint a { font-size: .84rem; font-weight: 700; }

.evidence-band { padding: 72px 0; background: var(--brand-violet); color: #eef1ff; }
.evidence-band .wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.evidence-band .eyebrow { color: #d8d4ff; }
.evidence-band h2, .evidence-band strong { color: #fff; }
.evidence-band h2 { font-size: clamp(2rem, 4vw, 3.7rem); }
.evidence-band p { font-size: 1rem; font-weight: 540; }
.evidence-links { display: flex; gap: 24px; }
.evidence-links a { color: #fff; font-weight: 800; }

.arabic-section { padding: clamp(76px, 10vw, 120px) 0; background: var(--navy-800); border-bottom: 1px solid var(--border); font-family: var(--font-ar); }
.arabic-layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: 90px; }
.arabic-section h2 { font-family: var(--font-ar); font-size: clamp(2.2rem, 4.4vw, 4rem); line-height: 1.35; letter-spacing: -.025em; }
.arabic-section p { color: var(--ink-300); font-size: 1.02rem; line-height: 1.95; }
.arabic-points { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; list-style: none; padding: 0; margin: 28px 0; }
.arabic-points li { position: relative; margin: 0; padding: 13px 18px 13px 34px; border: 1px solid var(--border); color: var(--ink-300); font-size: .9rem; }
.arabic-points li::before { content: "✓"; position: absolute; left: 14px; color: var(--emerald-bright); }

.closing-cta { padding: 86px 0; background: var(--navy-950); }
.closing-cta .wrap { display: flex; align-items: end; justify-content: space-between; gap: 40px; }
.closing-code { display: block; margin-bottom: 15px; color: var(--ink-600); }
.closing-cta h2 { font-size: clamp(2rem, 4.3vw, 4rem); }

/* Footer */
.site-footer { padding: 62px 0 30px; background: var(--navy-900); border-top: 1px solid var(--border-soft); font-size: .86rem; }
.footer-grid { display: grid; grid-template-columns: 1.45fr repeat(3, 1fr); gap: 44px; margin-bottom: 46px; }
.footer-identity .brand { margin-bottom: 15px; }
.footer-col h4 { margin-bottom: 16px; color: var(--ink-600); font: 800 .66rem/1 var(--font-data); letter-spacing: .11em; text-transform: uppercase; }
.footer-col ul { list-style: none; margin: 0; padding: 0; }
.footer-col li { margin: 0 0 9px; }
.footer-col a { color: var(--ink-300); text-decoration: none; }
.footer-col a:hover { color: var(--emerald-bright); }
.footer-tag { max-width: 30ch; margin-bottom: 8px; color: var(--ink-500); }
.footer-version { color: var(--ink-600); font: 700 .68rem/1 var(--font-data); }
.footer-brand { color: var(--ink-100); font-weight: 800; margin-bottom: 6px; }
.footer-bottom { padding-top: 25px; border-top: 1px solid var(--border-soft); color: var(--ink-600); font-size: .78rem; }

/* Article pages */
.article-hero { padding: 88px 0 50px; border-bottom: 1px solid var(--border-soft); background-image: linear-gradient(rgba(124,141,255,.035) 1px, transparent 1px), linear-gradient(90deg, rgba(124,141,255,.035) 1px, transparent 1px); background-size: 48px 48px; }
.article-hero h1 { font-size: clamp(2.6rem, 5vw, 4.7rem) !important; }
.article-hero .hero-lede { margin: 20px 0 0; max-width: 60ch; font-size: 1.05rem !important; }
.article-body { padding: 64px 0 100px; }
.article-layout { width: min(100% - 40px, 1020px); margin-inline: auto; display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 72px; }
.toc { position: sticky; top: 92px; align-self: start; }
.toc-label { margin-bottom: 15px; color: var(--ink-600); font: 800 .65rem/1 var(--font-data); letter-spacing: .1em; text-transform: uppercase; }
.toc ul { display: grid; gap: 1px; list-style: none; padding: 0; margin: 0; border-left: 1px solid var(--border); }
.toc li { margin: 0; }
.toc a { display: block; padding: 6px 0 6px 15px; color: var(--ink-500); font-size: .82rem; text-decoration: none; }
.toc a:hover { color: var(--emerald-bright); border-left: 1px solid var(--emerald-bright); margin-left: -1px; }
.article-content { max-width: var(--article-max); }
.article-content h2 { margin: 52px 0 12px; font-size: clamp(1.55rem, 2.8vw, 2.25rem); letter-spacing: -.025em; }
.article-content h2:first-child { margin-top: 0; }
.article-content h3 { margin: 30px 0 8px; }
.article-content p, .article-content li { color: var(--ink-300); }
.article-content pre { overflow-x: auto; padding: 15px; background: var(--navy-950); border: 1px solid var(--border); color: var(--ink-100); font: .82rem/1.5 var(--font-data); }
.disclaimer-inline { padding: 18px 20px; border: 1px solid rgba(241,179,90,.32); border-left: 3px solid var(--amber); background: var(--amber-dim); color: var(--ink-300); }
.note-line { padding: 14px 16px; border-left: 3px solid var(--emerald); background: var(--navy-800); color: var(--ink-300); }
.privacy-points { list-style: none; padding: 0; }
.compare-grid, .feature-grid, .split-grid, .limits-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.compare-card, .feature-card, .refs-panel, .limits-panel { padding: 24px; border: 1px solid var(--border); background: var(--navy-800); }
.compare-card ul { list-style: none; padding: 0; }
.compare-card li { display: flex; gap: 8px; }
.compare-card .icon { width: 17px; height: 17px; color: var(--emerald-bright); }
.compare-label { color: var(--emerald-bright); font: 700 .65rem/1 var(--font-data); letter-spacing: .1em; text-transform: uppercase; }
.term-cloud { display: flex; flex-wrap: wrap; gap: 7px; }
.term-chip { padding: 4px 8px; border: 1px solid var(--border); color: var(--ink-500); font: .72rem/1.4 var(--font-data); }

@media (max-width: 1040px) {
  nav.site-nav { display: none; }
  .hero-layout { grid-template-columns: 1fr; }
  .hero h1 { max-width: 12ch; }
  .acid-base-board { max-width: 650px; }
  .editorial-grid { grid-template-columns: 110px minmax(250px, .75fr) minmax(390px, 1.25fr); gap: 32px; }
  .edition-heading { margin-left: 110px; }
}

@media (max-width: 860px) {
  .nav-toggle { display: inline-flex; }
  .header-cta-desktop, .nav-pro { display: none; }
  body.nav-open .mobile-panel { display: block; }
  .hero { min-height: auto; padding: 64px 0 72px; }
  .editorial-grid { grid-template-columns: 1fr; }
  .section-index { margin-bottom: -10px; }
  .section-intro h2 { max-width: 16ch; }
  .privacy-fineprint { grid-column: 1; }
  .edition-heading { margin: 24px 0 44px; grid-template-columns: 1fr; gap: 22px; }
  .edition-row { grid-template-columns: .6fr 1fr 1.15fr; }
  .evidence-band .wrap, .arabic-layout { grid-template-columns: 1fr; gap: 38px; }
  .article-layout { grid-template-columns: 1fr; gap: 32px; }
  .toc { position: static; }
  .toc ul { display: flex; flex-wrap: wrap; gap: 7px 15px; border-left: 0; }
  .toc a { padding: 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 680px) {
  .wrap, .article, .article-layout { width: min(100% - 32px, var(--content-max)); }
  .site-header .wrap { min-height: 62px; }
  .brand-logo { width: 33px; height: 33px; }
  .hero h1 { font-size: clamp(2.8rem, 14vw, 4.5rem); }
  .hero-lede { margin-top: 23px; }
  .hero-proof { display: grid; grid-template-columns: 1fr 1fr; }
  .acid-base-board { box-shadow: 8px 8px 0 rgba(116,84,232,.08); }
  .acid-base-board::before { display: none; }
  .board-values > div { padding: 18px 11px 15px; }
  .board-values strong { font-size: 1.55rem; }
  .driver-grid, .calculation-verdict { grid-template-columns: 1fr; }
  .driver-card + .driver-card { border-left: 0; }
  .calculation-verdict > div { border-right: 0; }
  .identity-channel { grid-template-columns: 1fr; }
  .identity-channel strong { grid-row: auto; grid-column: auto; }
  .proof-rail .wrap { grid-template-columns: 1fr 1fr; }
  .proof-rail .wrap > div { min-height: 68px; padding: 12px; border-bottom: 1px solid var(--border-soft); }
  .proof-rail .wrap > div:nth-child(odd) { border-left: 1px solid var(--border-soft); }
  .proof-rail span { font-size: .75rem; }
  .editorial-section { padding: 72px 0; }
  .boundary-col { padding: 22px 19px; }
  .boundary-head { grid-template-columns: 1fr; }
  .boundary-col ul { grid-template-columns: 1fr; }
  .boundary-cut { padding-inline: 19px; }
  .edition-table { overflow-x: auto; }
  .edition-row { min-width: 690px; }
  .edition-row > div { padding: 14px; }
  .edition-actions { align-items: stretch; }
  .edition-actions .btn { width: 100%; }
  .edition-actions > span { margin-left: 0; }
  .data-flow { grid-template-columns: 1fr; gap: 8px; }
  .flow-node { min-height: 112px; }
  .flow-arrow { transform: rotate(90deg); justify-self: center; padding: 0; }
  .arabic-points { grid-template-columns: 1fr; }
  .closing-cta .wrap { display: grid; }
  .closing-cta .btn { width: 100%; }
  .footer-grid, .compare-grid, .feature-grid, .split-grid, .limits-grid { grid-template-columns: 1fr; }
}