:root {
  /* Preserve the approved live-site typography and neutral black/white palette. */
  --font-body: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-heading: ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
  --font-accent: ui-serif, Georgia, Cambria, "Times New Roman", Times, serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  color-scheme: dark;
  --background: #000;
  --foreground: #f5f5f5;
  --surface: #0c0c0c;
  --surface-raised: #141414;
  --muted: #a2a2a2;
  --subtle: #949494;
  --line: #ffffff19;
  --line-strong: #ffffff2c;
  --selection: #ffffff09;
  --button-bg: #f1f1f1;
  --button-text: #111;
  --button-hover: #dcdcdc;
}
:root[data-theme="light"] {
  color-scheme: light;
  --background: #fff;
  --foreground: #171717;
  --surface: #fafafa;
  --surface-raised: #f1f1f1;
  --muted: #606060;
  --subtle: #696969;
  --line: #00000017;
  --line-strong: #0000002c;
  --selection: #00000005;
  --button-bg: #181818;
  --button-text: #fff;
  --button-hover: #343434;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; scroll-padding-top: 28px; }
body { margin: 0; background: var(--background); color: var(--foreground); font: 400 1rem/1.6 var(--font-body); -webkit-font-smoothing: antialiased; }
button, input { font: inherit; }
button { background: none; border: 0; color: inherit; cursor: pointer; }
button, a, input, summary { -webkit-tap-highlight-color: transparent; touch-action: manipulation; }
a { color: inherit; text-decoration: none; }
button:focus-visible, a:focus-visible, input:focus-visible, summary:focus-visible, [tabindex]:focus-visible { outline: 2px solid var(--foreground); outline-offset: 4px; }
h1,h2,h3,h4,h5,p,blockquote { margin: 0; }
h1,h2,h3,h4,h5 { font-family: var(--font-heading); font-weight: 500; line-height: 1.3; text-wrap: balance; }
h1,h2 { font-weight: 300; }
h2 { font-size: 2.6875rem; letter-spacing: -.05em; line-height: 1.16; }
em { font: inherit; }
.type-accent { font-family: var(--font-accent); font-style: italic; }
.heading-secondary { color: var(--muted); }
svg { fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
.icon { width: 18px; height: 18px; flex-shrink: 0; vertical-align: middle; }
.symbols, .sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; }
.wrap { width: min(1160px,calc(100% - 96px)); margin-inline: auto; }
::selection { background: var(--foreground); color: var(--background); }
.skip-link { position: absolute; z-index: 100; top: -80px; left: 20px; background: var(--foreground); color: var(--background); padding: 12px 18px; border-radius: 6px; }
.skip-link:focus { top: 12px; }
.eyebrow, .mini-label { color: var(--muted); font-family: var(--font-heading); font-size: .875rem; font-weight: 400; line-height: 1.6; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 14px; min-height: 48px; padding: 12px 20px; border-radius: 7px; font-size: .9375rem; font-weight: 500; line-height: 1.4; transition: background .2s, border-color .2s; text-align: center; }
.button .icon, .text-link .icon { width: 16px; height: 16px; transition: transform .2s; }
.button:hover .icon, .text-link:hover .icon { transform: translateX(2px); }
.primary { background: var(--button-bg); color: var(--button-text); }
.primary:hover { background: var(--button-hover); }
.outline { border: 1px solid var(--line-strong); }
.outline:hover, .ghost:hover { background: var(--selection); }
.ghost { color: var(--muted); }
.button.small { font-size: .875rem; min-height: 42px; padding: 10px 15px; border-radius: 6px; }
.button:disabled { cursor: not-allowed; opacity: .55; }
.text-link { display: inline-flex; align-items: center; gap: 12px; padding: 10px 0; min-height: 44px; font-size: .875rem; font-weight: 400; text-align: left; }
.text-link:hover { text-decoration: underline; text-underline-offset: 5px; }
.small-note { font-size: .8125rem; color: var(--subtle); line-height: 1.65; }
.reading-progress { position: fixed; height: 1px; top: 0; left: 0; width: 100%; z-index: 50; pointer-events: none; }
.reading-progress span { display: block; height: 100%; background: var(--foreground); opacity: .35; transform: scaleX(var(--reading-progress,0)); transform-origin: left; }

.site-header { display: flex; flex-wrap: wrap; min-height: 84px; align-items: center; justify-content: space-between; gap: 12px 24px; padding-block: 12px; }
.brand { display: inline-flex; align-items: center; gap: 3px; font-family: var(--font-heading); font-size: 1.5625rem; font-weight: 500; letter-spacing: -1.1px; margin-left: -7px; flex-shrink: 0; }
.brand-image { object-fit: contain; width: 42px; height: 42px; mix-blend-mode: screen; flex-shrink: 0; }
[data-theme="light"] .brand-image { filter: invert(1); mix-blend-mode: multiply; }
.top-nav { display: flex; gap: 22px; color: var(--muted); font-family: var(--font-heading); font-size: .875rem; }
.top-nav a { padding-block: 10px; white-space: nowrap; }
.top-nav a:hover { color: var(--foreground); }
.header-actions { display: flex; gap: 18px; align-items: center; }
.theme-toggle { display: grid; place-items: center; width: 44px; height: 44px; border-radius: 6px; color: var(--muted); flex-shrink: 0; }
.theme-toggle:hover { background: var(--selection); color: var(--foreground); }
.theme-toggle .icon { width: 17px; height: 17px; }
.theme-moon, [data-theme="light"] .theme-sun { display: none; }
[data-theme="light"] .theme-moon { display: block; }
.login { font-size: .875rem; display: flex; align-items: center; gap: 6px; white-space: nowrap; }
.login .icon { width: 13px; height: 13px; }
.header-cta { white-space: nowrap; }

.hero { padding: 64px 0 66px; text-align: center; position: relative; isolation: isolate; }
.hero::before { content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none; background: radial-gradient(ellipse at 50% 15%,#ffffff06,transparent 65%); }
[data-theme="light"] .hero::before { background: radial-gradient(ellipse at 50% 15%,#00000002,transparent 65%); }
.hero-eyebrow { font-size: .875rem; color: var(--muted); margin-bottom: 20px; }
.hero h1 { font-size: 4.5rem; font-weight: 300; line-height: 1.1; letter-spacing: -.05em; }
.hero h1 > span { display: block; }
.hero-description { max-width: 640px; margin: 24px auto 0; font-size: 1.25rem; color: var(--muted); line-height: 1.5; text-wrap: pretty; }
.hero-emphasis { color: var(--foreground); }
.hero-actions { display: flex; justify-content: center; align-items: center; gap: 12px; margin-top: 26px; }
.helper { font-size: .8125rem; color: var(--subtle); margin-top: 13px; }

.demo-section { padding-bottom: 94px; }
.section-heading { display: flex; justify-content: space-between; align-items: end; gap: 55px; margin-bottom: 40px; }
.section-heading h2 { margin-top: 14px; }
.section-heading > p { max-width: 350px; color: var(--muted); font-size: 1rem; line-height: 1.7; }
.demo-heading { align-items: end; margin-bottom: 26px; }
.demo-heading h2 { font-size: 1.75rem; font-weight: 400; letter-spacing: -.035em; }
.demo-heading > p { font-size: .875rem; }
.steps { display: flex; gap: 28px; border-bottom: 1px solid var(--line); margin-bottom: 24px; }
.steps button { position: relative; padding: 13px 0; min-height: 48px; font-size: .875rem; line-height: 1.5; color: var(--muted); text-align: left; }
.steps button::after { content: ""; position: absolute; height: 2px; left: 0; right: 0; bottom: -1px; background: var(--foreground); transform: scaleX(0); transition: transform .2s ease; }
.steps button[aria-selected="true"] { color: var(--foreground); }
.steps button[aria-selected="true"]::after { transform: scaleX(1); }
.steps button:hover { color: var(--foreground); }
.brief-frame { background: var(--surface); border: 1px solid var(--line-strong); border-radius: 12px; box-shadow: 0 28px 90px #00000014; }
[data-theme="light"] .brief-frame { background: #fff; box-shadow: 0 14px 60px #00000005; }
.brief-header { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 27px 36px 18px; }
.brief-heading { display: flex; align-items: center; gap: 14px; min-width: 0; }
.document-icon { width: 38px; height: 44px; border: 1px solid var(--line-strong); border-radius: 5px; display: grid; place-items: center; color: var(--muted); flex-shrink: 0; }
.brief-heading .mini-label { font-size: .8125rem; margin-bottom: 6px; }
.brief-heading h3 { font-size: 1.375rem; font-weight: 400; letter-spacing: -.025em; text-wrap: pretty; }
.brief-date { flex-shrink: 0; color: var(--subtle); font-size: .8125rem; text-align: right; }
.brief-date time { display: block; }
.sample-disclosure { font-size: .8125rem; color: var(--muted); padding: 0 36px 23px; border-bottom: 1px solid var(--line); }
.demo-panel { padding: 28px 36px 30px; min-width: 0; outline-offset: -4px !important; }
.brief-context { display: grid; grid-template-columns: 1.25fr 1fr; gap: 50px; margin-bottom: 28px; padding-bottom: 25px; border-bottom: 1px solid var(--line); }
.brief-context p { font-size: .9375rem; margin-top: 5px; }
.brief-columns { display: grid; grid-template-columns: 1.25fr 1fr; gap: 50px; }
.brief-columns > *, .brief-columns section { min-width: 0; }
.brief-columns h4 { font-size: .875rem; font-weight: 500; line-height: 1.5; margin-bottom: 12px; }
.opening-block blockquote { font-size: 1.1875rem; line-height: 1.65; letter-spacing: -.015em; }
.opening-block .small-note { margin-top: 12px; }
.questions-block { margin-top: 29px; }
.discovery-questions { margin: 0; padding: 0; list-style: none; }
.discovery-questions li { display: flex; gap: 18px; padding: 17px 0; border-top: 1px solid var(--line); }
.question-index { color: var(--subtle); font: .75rem/1.75 var(--mono); padding-top: 3px; flex-shrink: 0; }
.discovery-questions p { line-height: 1.65; }
.question-purpose { display: inline-block; font-size: .8125rem; color: var(--muted); margin-top: 7px; }
.next-step { margin-top: 14px; padding-top: 23px; border-top: 1px solid var(--line-strong); }
.next-step p { color: var(--muted); font-size: 1rem; line-height: 1.7; }
.reasoning-column { border-left: 1px solid var(--line); padding-left: 30px; }
.reasoning-column > section + section { border-top: 1px solid var(--line); padding-top: 22px; margin-top: 22px; }
.reasoning-column p { color: var(--muted); font-size: .9375rem; line-height: 1.7; }
.reasoning-column .small-note { font-size: .8125rem; margin-top: 10px; }
.brief-fact + .brief-fact { margin-top: 18px; }
.source-link { display: inline-flex; align-items: center; gap: 7px; font-size: .875rem; min-height: 34px; margin-top: 5px; padding: 4px 0; text-decoration: underline; text-decoration-color: var(--line-strong); text-underline-offset: 4px; }
.source-link .icon { width: 13px; height: 13px; }
.source-link:hover { text-decoration-color: var(--foreground); }
.source-date { display: block; font-size: .75rem; color: var(--subtle); line-height: 1.65; }
.role-list { margin: 0; }
.role-list > div + div { margin-top: 12px; }
.role-list dt { font-size: .875rem; color: var(--foreground); }
.role-list dd { font-size: .875rem; color: var(--muted); margin: 2px 0 0; line-height: 1.6; }
.brief-bottom { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 14px 36px; border-top: 1px solid var(--line); }
.brief-bottom > span { font-size: .8125rem; color: var(--muted); max-width: 490px; }
.brief-bottom .text-link { flex-shrink: 0; }
.demo-caption { margin-top: 16px; color: var(--subtle); font-size: .8125rem; }
.panel-intro { max-width: 700px; margin-bottom: 28px; }
.panel-intro h4 { font-size: 1.6875rem; font-weight: 400; letter-spacing: -.03em; margin: 11px 0 14px; }
.panel-intro p { color: var(--muted); font-size: 1rem; }
.ledger-row { display: grid; grid-template-columns: 30px minmax(0,1fr) 115px; gap: 22px; padding: 24px 0; border-top: 1px solid var(--line); }
.ledger-number { color: var(--subtle); font: .8125rem/1.7 var(--mono); }
.ledger-row h5 { font-size: 1rem; margin-bottom: 9px; }
.ledger-row p { max-width: 700px; color: var(--muted); }
.evidence-tag { font-size: .8125rem; color: var(--muted); text-align: right; }
.source-stack { display: flex; flex-direction: column; gap: 12px; margin-top: 18px; }
.source-stack a { display: flex; align-items: center; flex-wrap: wrap; gap: 7px 15px; width: fit-content; font-size: .875rem; text-decoration: underline; text-decoration-color: var(--line-strong); text-underline-offset: 4px; }
.source-stack a span { font-size: .75rem; color: var(--subtle); text-decoration: none; }
.source-stack a .icon { width: 13px; height: 13px; }
.panel-footnote { color: var(--subtle); font-size: .8125rem; margin-top: 22px; max-width: 790px; line-height: 1.7; }
.panel-footnote a { text-decoration: underline; text-underline-offset: 3px; }
.demo-panel > .text-link { margin-top: 14px; }
.fixed-evidence { padding: 18px 22px; background: var(--surface-raised); border-left: 2px solid var(--line-strong); margin-bottom: 26px; }
.fixed-evidence p { margin-top: 5px; }
.offering-control { display: flex; align-items: center; flex-wrap: wrap; gap: 16px; margin-bottom: 26px; }
.offering-control > span { font-size: .875rem; color: var(--muted); }
.offering-switch { display: flex; flex-wrap: wrap; gap: 4px; padding: 4px; border: 1px solid var(--line); border-radius: 7px; }
.offering-switch button { padding: 9px 14px; min-height: 42px; border-radius: 4px; color: var(--muted); font-size: .875rem; line-height: 1.5; text-align: left; transition: background .2s,color .2s; }
.offering-switch button[aria-pressed="true"] { background: var(--surface-raised); color: var(--foreground); }
.product-interpretation { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; padding-top: 24px; border-top: 1px solid var(--line); }
.product-interpretation h5 { font-size: .9375rem; margin: 22px 0 10px; }
.product-interpretation > section:nth-child(2) h5:first-child { margin-top: 0; }
.product-interpretation p { color: var(--muted); line-height: 1.7; }
.product-interpretation .product-question { color: var(--foreground); font-size: 1.25rem; line-height: 1.55; letter-spacing: -.02em; }
.product-interpretation .mini-label { font-size: .8125rem; }

.approach-section { padding: 18px 0 91px; }
.approach-flow { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 44px; padding: 0; margin: 47px 0 0; list-style: none; }
.approach-flow li { border-top: 1px solid var(--line-strong); padding-top: 18px; }
.flow-index { font: .8125rem var(--mono); color: var(--subtle); }
.approach-flow h3 { font-size: 1.125rem; font-weight: 400; margin: 21px 0 12px; letter-spacing: -.025em; }
.approach-flow p { color: var(--muted); line-height: 1.7; }
.comparison-note { border-top: 1px solid var(--line); margin-top: 34px; padding-top: 24px; color: var(--muted); max-width: 870px; font-size: .9375rem; line-height: 1.7; }

.platform-section { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 81px 0; }
.platform-layout { display: grid; grid-template-columns: .85fr 1.15fr; gap: 90px; align-items: start; }
.platform-copy h2 { margin-top: 18px; font-size: 3rem; }
.platform-copy > p { color: var(--muted); font-size: 1.0625rem; margin-top: 25px; line-height: 1.75; max-width: 400px; }
.platform-copy .text-link { margin-top: 20px; }
.platform-capabilities { margin: 0; min-width: 0; }
.platform-capabilities > div { display: grid; grid-template-columns: .85fr 1.15fr; gap: 26px; padding: 26px 0; border-top: 1px solid var(--line); }
.platform-capabilities > div:first-child { padding-top: 0; border-top: 0; }
.platform-capabilities > div:last-child { padding-bottom: 0; }
.platform-capabilities dt span { display: block; font-size: .8125rem; color: var(--muted); margin-bottom: 9px; }
.platform-capabilities dt strong { display: block; font-family: var(--font-heading); font-size: 1.125rem; font-weight: 400; letter-spacing: -.02em; }
.platform-capabilities dd { margin: 0; color: var(--muted); line-height: 1.75; }
summary { cursor: pointer; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary .icon { transition: transform .2s; width: 16px; height: 16px; }
details[open] > summary .icon { transform: rotate(45deg); }

.faq-section { padding: 87px 0; }
.faq-layout { display: grid; grid-template-columns: .75fr 1.25fr; gap: 75px; }
.faq-copy h2 { font-size: 2.375rem; }
.faq-copy p { color: var(--muted); margin-top: 20px; font-size: 1rem; }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list details:first-child { border-top: 1px solid var(--line); }
.faq-list summary { display: flex; justify-content: space-between; align-items: center; gap: 24px; min-height: 67px; padding: 20px 0; font-size: 1rem; line-height: 1.5; }
.faq-list details > p { color: var(--muted); font-size: 1rem; line-height: 1.8; padding: 0 28px 23px 0; }

.closing { display: grid; grid-template-columns: 1.05fr 1fr; align-items: start; gap: 106px; padding: 38px 0 96px; }
.closing-copy h2 { margin-top: 18px; font-size: 2.75rem; }
.closing-copy > p { font-size: 1.0625rem; line-height: 1.75; color: var(--muted); margin-top: 24px; max-width: 410px; }
.walkthrough-agenda { padding: 0; margin: 26px 0 21px; list-style: none; }
.walkthrough-agenda li { display: flex; gap: 18px; padding: 12px 0; border-top: 1px solid var(--line); font-size: .9375rem; line-height: 1.65; }
.walkthrough-agenda li > span { font: .75rem/1.8 var(--mono); color: var(--subtle); padding-top: 2px; }
.request-panel { border: 1px solid var(--line); border-radius: 10px; padding: 30px; background: var(--surface); min-width: 0; }
.request-panel h3 { font-size: 1.5rem; font-weight: 400; line-height: 1.3; letter-spacing: -.025em; margin-top: 14px; }
#request-context { font-size: .9375rem; color: var(--muted); margin-top: 12px; }
#demo-request-form { margin-top: 27px; }
#demo-request-form label { display: flex; justify-content: space-between; gap: 16px; font-size: .875rem; margin: 19px 0 9px; }
#demo-request-form label span { color: var(--subtle); font-size: .8125rem; }
#demo-request-form input { width: 100%; min-width: 0; min-height: 47px; border: 1px solid var(--line-strong); border-radius: 5px; background: var(--background); color: var(--foreground); padding: 11px 13px; font-size: 1rem; }
#demo-request-form input::placeholder { color: var(--subtle); opacity: 1; }
.request-preview-note { font-size: .8125rem; line-height: 1.7; color: var(--muted); margin-top: 21px; }
.request-submit { width: 100%; margin-top: 22px; }
.request-alternative { font-size: .8125rem; color: var(--subtle); line-height: 1.7; margin-top: 19px; }
.request-alternative a { text-decoration: underline; text-underline-offset: 3px; }
.request-complete { padding: 25px 0; }
.completion-mark { display: inline-flex; align-items: center; justify-content: center; width: 38px; height: 38px; border: 1px solid var(--line-strong); border-radius: 50%; margin-bottom: 9px; }
.request-complete > p { color: var(--muted); font-size: 1rem; line-height: 1.7; margin-top: 19px; }
.request-complete .text-link { margin-top: 22px; }

.site-footer { display: flex; gap: 20px 30px; align-items: center; flex-wrap: wrap; padding: 34px 0 28px; border-top: 1px solid var(--line); }
.footer-note { color: var(--muted); font-size: .875rem; }
.site-footer nav { display: flex; gap: 24px; margin-left: auto; font-size: .875rem; color: var(--muted); }
.site-footer nav a { padding: 10px 0; }
.site-footer nav a:hover { color: var(--foreground); }
.copyright { width: 100%; color: var(--subtle); font-size: .75rem; }

@keyframes panel-in { from { opacity: .4; transform: translateY(5px); } to { opacity: 1; transform: none; } }
.motion-enabled .demo-panel:not([hidden]) { animation: panel-in .24s ease both; }
.motion-enabled [data-reveal] { opacity: 0; transform: translateY(14px); transition: opacity .6s ease,transform .6s ease; }
.motion-enabled [data-reveal].is-visible, .motion-enabled [data-reveal]:focus-within { opacity: 1; transform: none; }

@media (max-width: 1150px) {
  .top-nav { gap: 16px; }
  .header-actions { gap: 12px; }
  .site-header { gap: 18px; }
  .login { display: none; }
  .hero h1 { font-size: 4.125rem; }
  .platform-layout, .closing { gap: 65px; }
  .brief-columns, .brief-context { gap: 32px; }
  .reasoning-column { padding-left: 24px; }
}
@media (max-width: 960px) {
  .wrap { width: calc(100% - 64px); }
  .top-nav { display: none; }
  .login { display: flex; }
  .hero h1 { font-size: 3.75rem; }
  .hero { padding-top: 47px; }
  .section-heading { gap: 32px; }
  .section-heading > p { max-width: 295px; }
  .brief-header { padding: 24px 26px 16px; }
  .sample-disclosure { padding: 0 26px 20px; }
  .demo-panel { padding: 25px 26px; }
  .brief-bottom { padding: 14px 26px; }
  .brief-columns { grid-template-columns: 1.15fr 1fr; gap: 28px; }
  .brief-context { grid-template-columns: 1.15fr 1fr; gap: 28px; }
  .opening-block blockquote { font-size: 1.125rem; }
  .reasoning-column { padding-left: 22px; }
  .brief-bottom { align-items: start; }
  .brief-bottom > span { max-width: 320px; }
  .approach-flow { gap: 28px; }
  .platform-layout { gap: 45px; grid-template-columns: .9fr 1.1fr; }
  .platform-capabilities > div { grid-template-columns: 1fr; gap: 12px; }
  .platform-copy h2 { font-size: 2.625rem; }
  .faq-layout { grid-template-columns: .75fr 1.25fr; gap: 45px; }
  .closing { gap: 45px; grid-template-columns: 1fr 1fr; }
  .closing-copy h2 { font-size: 2.375rem; }
  .request-panel { padding: 25px; }
  .request-submit { gap: 10px; padding-inline: 14px; }
}
@media (max-width: 760px) {
  .section-heading { flex-direction: column; align-items: start; gap: 19px; }
  .section-heading > p { max-width: 510px; }
  .section-heading br { display: none; }
  .brief-columns { grid-template-columns: 1fr; gap: 30px; }
  .reasoning-column { border-left: 0; padding-left: 0; padding-top: 24px; border-top: 1px solid var(--line); display: grid; grid-template-columns: 1fr 1fr; gap: 22px 28px; }
  .reasoning-column > section + section { padding-top: 0; margin-top: 0; border-top: 0; }
  .reasoning-column > section:last-child { grid-column: 1 / -1; padding-top: 20px; border-top: 1px solid var(--line); }
  .role-list { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 20px; }
  .role-list > div + div { margin-top: 0; }
  .brief-bottom { flex-direction: column; gap: 4px; }
  .brief-bottom > span { max-width: none; }
  .platform-layout { grid-template-columns: 1fr; gap: 36px; }
  .platform-copy > p { max-width: 560px; }
  .platform-capabilities > div { grid-template-columns: .75fr 1.25fr; gap: 30px; }
  .faq-layout { grid-template-columns: 1fr; gap: 29px; }
  .faq-copy p br { display: none; }
  .closing { grid-template-columns: 1fr; gap: 36px; }
  .closing-copy > p { max-width: 570px; }
  .closing-copy h2 { font-size: 2.75rem; }
  .request-panel { max-width: none; padding: 30px; }
  .site-footer nav { margin-left: 0; width: 100%; }
  .copyright { margin-top: 0; }
}
@media (max-width: 600px) {
  .wrap { width: calc(100% - 40px); }
  .site-header { min-height: 72px; }
  .brand { font-size: 1.375rem; }
  .brand-image { width: 38px; height: 38px; }
  .header-actions { gap: 10px; }
  .header-cta { display: none; }
  .hero { padding: 35px 0 47px; }
  .hero h1 { font-size: clamp(2.3rem,8.1vw,3rem); line-height: 1.15; }
  .hero-description { font-size: 1.0625rem; line-height: 1.65; max-width: 440px; margin-top: 21px; }
  .hero-eyebrow { font-size: .8125rem; margin-bottom: 18px; }
  .hero-actions { flex-direction: column; gap: 9px; margin-top: 24px; }
  .hero-actions .button { width: 100%; max-width: 360px; }
  .hero .helper { max-width: 285px; margin-inline: auto; }
  .demo-heading h2 { font-size: 1.625rem; }
  .demo-heading { margin-bottom: 22px; gap: 14px; }
  .demo-heading > p br { display: none; }
  .demo-section { padding-bottom: 62px; }
  .steps { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 18px; margin-bottom: 20px; }
  .steps button { font-size: .875rem; min-height: 62px; line-height: 1.45; padding: 11px 0; }
  .brief-frame { border-radius: 8px; }
  .brief-header { padding: 22px 20px 16px; flex-wrap: wrap; gap: 12px; }
  .brief-heading { gap: 10px; }
  .brief-heading h3 { font-size: 1.1875rem; line-height: 1.4; }
  .brief-heading .mini-label { font-size: .75rem; }
  .document-icon { display: none; }
  .brief-date { text-align: left; font-size: .75rem; }
  .brief-date time { display: inline; }
  .sample-disclosure { padding: 0 20px 19px; line-height: 1.65; }
  .demo-panel { padding: 22px 20px; }
  .brief-context { grid-template-columns: 1fr; gap: 14px; margin-bottom: 22px; padding-bottom: 22px; }
  .brief-context p { font-size: .9375rem; margin-top: 3px; }
  .brief-columns { gap: 26px; }
  .opening-block blockquote { font-size: 1.125rem; line-height: 1.7; }
  .questions-block { margin-top: 25px; }
  .discovery-questions li { gap: 12px; }
  .reasoning-column { grid-template-columns: 1fr; gap: 23px; }
  .reasoning-column > section + section { border-top: 1px solid var(--line); padding-top: 22px; }
  .reasoning-column > section:last-child { grid-column: auto; }
  .role-list { display: block; }
  .role-list > div + div { margin-top: 12px; }
  .brief-bottom { padding: 16px 20px; gap: 7px; }
  .brief-bottom .text-link { flex-shrink: 1; }
  .panel-intro h4 { font-size: 1.4375rem; }
  .ledger-row { grid-template-columns: 20px minmax(0,1fr); gap: 12px; padding: 21px 0; }
  .ledger-row .evidence-tag { grid-column: 2; text-align: left; }
  .source-stack a { display: inline; line-height: 1.8; }
  .source-stack a span { display: block; }
  .source-stack a .icon { display: none; }
  .fixed-evidence { padding: 17px; }
  .offering-control { align-items: start; gap: 10px; }
  .offering-switch { display: grid; grid-template-columns: 1fr; width: 100%; }
  .product-interpretation { grid-template-columns: 1fr; gap: 24px; }
  .product-interpretation > section + section { border-top: 1px solid var(--line); padding-top: 24px; }
  .approach-section { padding-bottom: 61px; }
  h2 { font-size: 2.125rem; }
  .approach-flow { grid-template-columns: 1fr; gap: 26px; margin-top: 27px; }
  .approach-flow h3 { margin-top: 13px; }
  .comparison-note { margin-top: 26px; padding-top: 23px; }
  .platform-section { padding: 56px 0; }
  .platform-copy h2 { font-size: 2.5rem; }
  .platform-copy > p { font-size: 1rem; }
  .platform-capabilities > div { grid-template-columns: 1fr; gap: 12px; }
  .faq-section { padding: 59px 0; }
  .faq-copy h2 { font-size: 2.125rem; }
  .faq-list summary { gap: 15px; padding: 19px 0; }
  .faq-list details > p { padding-right: 0; }
  .closing { padding: 9px 0 65px; }
  .closing-copy h2 { font-size: 2.375rem; }
  .closing-copy > p { font-size: 1rem; }
  .request-panel { padding: 24px 20px; }
  .request-panel h3 { font-size: 1.375rem; }
  .request-submit { font-size: .875rem; padding-inline: 12px; }
  .site-footer { padding: 27px 0; gap: 15px 20px; }
  .footer-note { font-size: .8125rem; }
  .site-footer nav { gap: 14px 23px; flex-wrap: wrap; font-size: .875rem; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  [data-reveal] { opacity: 1 !important; transform: none !important; }
}